Added recomp runtime library and portultra, MM initial boot

.gitignore

@@ -42,10 +42,7 @@ bld/
 .vs/
 
 # Libraries (binaries that aren't in the repo)
-Lib
+lib/
-
-# RT64 (since it's not public yet)
-RT64
 
 # Runtime files
 imgui.ini

MMRecomp.vcxproj

@@ -17,7 +17,6 @@
       <Configuration>Release</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
-
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <VCProjectVersion>16.0</VCProjectVersion>
@@ -53,25 +52,23 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
-
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Label="Shared" >
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
-    <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-      <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    </ImportGroup>
-    <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-      <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    </ImportGroup>
-    <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-      <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    </ImportGroup>
-    <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-      <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    </ImportGroup>
-
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <LinkIncremental>true</LinkIncremental>
@@ -85,18 +82,24 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <LinkIncremental>false</LinkIncremental>
   </PropertyGroup>
-
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>$(SolutionDir)include;$(SolutionDir)lib/SDL2-2.24.0\include;$(SolutionDir)thirdparty;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(ProjectDir)lib\RT64\$(Configuration)\RT64.lib;$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
+    <PostBuildEvent>
+      <Command>XCOPY "$(ProjectDir)lib\RT64\$(Configuration)\*.dll" "$(TargetDir)" /S /Y
+XCOPY "$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.dll" "$(TargetDir)" /S /Y</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
@@ -106,13 +109,20 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>$(SolutionDir)include;$(SolutionDir)lib/SDL2-2.24.0\include;$(SolutionDir)thirdparty;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(ProjectDir)lib\RT64\$(Configuration)\RT64.lib;$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
+    <PostBuildEvent>
+      <Command>XCOPY "$(ProjectDir)lib\RT64\$(Configuration)\*.dll" "$(TargetDir)" /S /Y
+XCOPY "$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.dll" "$(TargetDir)" /S /Y</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
@@ -120,11 +130,18 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>$(SolutionDir)include;$(SolutionDir)lib/SDL2-2.24.0\include;$(SolutionDir)thirdparty;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(ProjectDir)lib\RT64\$(Configuration)\RT64.lib;$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
+    <PostBuildEvent>
+      <Command>XCOPY "$(ProjectDir)lib\RT64\$(Configuration)\*.dll" "$(TargetDir)" /S /Y
+XCOPY "$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.dll" "$(TargetDir)" /S /Y</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <ClCompile>
@@ -134,17 +151,83 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>$(SolutionDir)include;$(SolutionDir)lib/SDL2-2.24.0\include;$(SolutionDir)thirdparty;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(ProjectDir)lib\RT64\$(Configuration)\RT64.lib;$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
+    <PostBuildEvent>
+      <Command>XCOPY "$(ProjectDir)lib\RT64\$(Configuration)\*.dll" "$(TargetDir)" /S /Y
+XCOPY "$(ProjectDir)lib\SDL2-2.24.0\lib\$(Platform)\SDL2.dll" "$(TargetDir)" /S /Y</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
-
+  <ItemGroup>
-  <ItemGroup></ItemGroup>
+    <ClCompile Include="portultra\audio.cpp" />
+    <ClCompile Include="portultra\events.cpp" />
+    <ClCompile Include="portultra\mesgqueue.cpp" />
+    <ClCompile Include="portultra\misc_ultra.cpp" />
+    <ClCompile Include="portultra\port_main.c" />
+    <ClCompile Include="portultra\scheduler.cpp" />
+    <ClCompile Include="portultra\task_pthreads.cpp" />
+    <ClCompile Include="portultra\task_win32.cpp" />
+    <ClCompile Include="portultra\threads.cpp" />
+    <ClCompile Include="portultra\timer.cpp" />
+    <ClCompile Include="portultra\ultrainit.cpp" />
+    <ClCompile Include="RecompiledFuncs\lookup.cpp" />
+    <ClCompile Include="rsp\aspMain.cpp">
+      <Optimization Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">MaxSpeed</Optimization>
+      <Optimization Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">MaxSpeed</Optimization>
+      <BasicRuntimeChecks Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Default</BasicRuntimeChecks>
+      <BasicRuntimeChecks Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Default</BasicRuntimeChecks>
+    </ClCompile>
+    <ClCompile Include="rsp\njpgdspMain.cpp">
+      <Optimization Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">MaxSpeed</Optimization>
+      <Optimization Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">MaxSpeed</Optimization>
+      <BasicRuntimeChecks Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Default</BasicRuntimeChecks>
+      <BasicRuntimeChecks Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Default</BasicRuntimeChecks>
+    </ClCompile>
+    <ClCompile Include="src\ai.cpp" />
+    <ClCompile Include="src\cont.cpp" />
+    <ClCompile Include="src\dp.cpp" />
+    <ClCompile Include="src\eep.cpp" />
+    <ClCompile Include="src\euc-jp.cpp" />
+    <ClCompile Include="src\flash.cpp" />
+    <ClCompile Include="src\math_routines.cpp" />
+    <ClCompile Include="src\overlays.cpp" />
+    <ClCompile Include="src\pak.cpp" />
+    <ClCompile Include="src\pi.cpp" />
+    <ClCompile Include="src\portultra_stubs.cpp" />
+    <ClCompile Include="src\portultra_translation.cpp" />
+    <ClCompile Include="src\print.cpp" />
+    <ClCompile Include="src\recomp.cpp" />
+    <ClCompile Include="src\rt64_layer.cpp" />
+    <ClCompile Include="src\sp.cpp" />
+    <ClCompile Include="src\vi.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\disable_warnings.h" />
+    <ClInclude Include="include\recomp.h" />
+    <ClInclude Include="include\rsp.h" />
+    <ClInclude Include="include\rsp_vu.h" />
+    <ClInclude Include="include\rsp_vu_impl.h" />
+    <ClInclude Include="include\rt64_layer.h" />
+    <ClInclude Include="include\sections.h" />
+    <ClInclude Include="portultra\multilibultra.hpp" />
+    <ClInclude Include="portultra\platform_specific.h" />
+    <ClInclude Include="portultra\ultra64.h" />
+    <ClInclude Include="src\euc-jp.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="RecompiledFuncs.vcxproj">
+      <Project>{7bf5e3f9-c49f-4c84-ab64-7681f028cac2}</Project>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

MMRecomp.vcxproj.filters

@@ -14,4 +14,134 @@
       <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
     </Filter>
   </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="src\ai.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\cont.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\dp.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\eep.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\euc-jp.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\math_routines.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\overlays.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\pak.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\pi.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\portultra_translation.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\print.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\recomp.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\sp.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vi.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\audio.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\events.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\mesgqueue.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\misc_ultra.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\port_main.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\scheduler.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\task_pthreads.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\task_win32.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\threads.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\timer.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="portultra\ultrainit.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\rt64_layer.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\portultra_stubs.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\flash.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="RecompiledFuncs\lookup.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="rsp\njpgdspMain.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="rsp\aspMain.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="src\euc-jp.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\disable_warnings.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\recomp.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rsp.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rsp_vu.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rsp_vu_impl.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="portultra\multilibultra.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="portultra\platform_specific.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="portultra\ultra64.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rt64_layer.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\sections.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
 </Project>

RecompiledFuncs.vcxproj

@@ -113,8 +113,11 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <EnableParallelCodeGeneration>
+      </EnableParallelCodeGeneration>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <WholeProgramOptimization>false</WholeProgramOptimization>
+      <PrecompiledHeaderFile />
     </ClCompile>
     <Link>
       <SubSystem>
@@ -149,8 +152,11 @@
       <PreprocessorDefinitions>NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <EnableParallelCodeGeneration>
+      </EnableParallelCodeGeneration>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <WholeProgramOptimization>false</WholeProgramOptimization>
+      <PrecompiledHeaderFile />
     </ClCompile>
     <Link>
       <SubSystem>

include/rsp.h

@@ -0,0 +1,65 @@
+#ifndef __RSP_H__
+#define __RSP_H__
+
+#include "rsp_vu.h"
+#include "recomp.h"
+
+enum class RspExitReason {
+    Invalid,
+    Broke,
+    ImemOverrun,
+    UnhandledJumpTarget
+};
+
+extern uint8_t dmem[];
+extern uint16_t rspReciprocals[512];
+extern uint16_t rspInverseSquareRoots[512];
+
+#define RSP_MEM_W(offset, addr) \
+    (*reinterpret_cast<uint32_t*>(dmem + (offset) + (addr)))
+
+#define RSP_MEM_H(offset, addr) \
+    (*reinterpret_cast<int16_t*>(dmem + (((offset) + (addr)) ^ 2)))
+
+#define RSP_MEM_HU(offset, addr) \
+    (*reinterpret_cast<uint16_t*>(dmem + (((offset) + (addr)) ^ 2)))
+
+#define RSP_MEM_B(offset, addr) \
+    (*reinterpret_cast<int8_t*>(dmem + (((offset) + (addr)) ^ 3)))
+
+#define RSP_MEM_BU(offset, addr) \
+    (*reinterpret_cast<uint8_t*>(dmem + (((offset) + (addr)) ^ 3)))
+    
+#define RSP_ADD32(a, b) \
+    ((int32_t)((a) + (b)))
+    
+#define RSP_SUB32(a, b) \
+    ((int32_t)((a) - (b)))
+
+#define RSP_SIGNED(val) \
+    ((int32_t)(val))
+
+#define SET_DMA_DMEM(dmem_addr) dma_dmem_address = (dmem_addr)
+#define SET_DMA_DRAM(dram_addr) dma_dram_address = (dram_addr)
+#define DO_DMA_READ(rd_len) dma_rdram_to_dmem(rdram, dma_dmem_address, dma_dram_address, (rd_len))
+#define DO_DMA_WRITE(wr_len) dma_dmem_to_rdram(rdram, dma_dmem_address, dma_dram_address, (wr_len))
+
+static inline void dma_rdram_to_dmem(uint8_t* rdram, uint32_t dmem_addr, uint32_t dram_addr, uint32_t rd_len) {
+    rd_len += 1; // Read length is inclusive
+    dram_addr &= 0xFFFFF8;
+    assert(dmem_addr + rd_len <= 0x1000);
+    for (uint32_t i = 0; i < rd_len; i++) {
+        RSP_MEM_B(i, dmem_addr) = MEM_B(0, (int64_t)(int32_t)(dram_addr + i + 0x80000000));
+    }
+}
+
+static inline void dma_dmem_to_rdram(uint8_t* rdram, uint32_t dmem_addr, uint32_t dram_addr, uint32_t wr_len) {
+    wr_len += 1; // Write length is inclusive
+    dram_addr &= 0xFFFFF8;
+    assert(dmem_addr + wr_len <= 0x1000);
+    for (uint32_t i = 0; i < wr_len; i++) {
+        MEM_B(0, (int64_t)(int32_t)(dram_addr + i + 0x80000000)) = RSP_MEM_B(i, dmem_addr);
+    }
+}
+
+#endif

include/rsp_vu.h

@@ -0,0 +1,199 @@
+// This file is modified from the Ares N64 emulator core. Ares can
+// be found at https://github.com/ares-emulator/ares. The original license
+// for this portion of Ares is as follows:
+// ----------------------------------------------------------------------
+// ares
+// 
+// Copyright(c) 2004 - 2021 ares team, Near et al
+// 
+// Permission to use, copy, modify, and /or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright noticeand this permission notice appear in all copies.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS.IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+// ----------------------------------------------------------------------
+#include <cstdint>
+
+#define ARCHITECTURE_AMD64
+#define ARCHITECTURE_SUPPORTS_SSE4_1 1
+
+#if defined(ARCHITECTURE_AMD64)
+#include <nmmintrin.h>
+using v128 = __m128i;
+#elif defined(ARCHITECTURE_ARM64)
+#include <sse2neon.h>
+using v128 = __m128i;
+#endif
+
+namespace Accuracy {
+    namespace RSP {
+#if ARCHITECTURE_SUPPORTS_SSE4_1
+        constexpr bool SISD = false;
+        constexpr bool SIMD = true;
+#else
+        constexpr bool SISD = true;
+        constexpr bool SIMD = false;
+#endif
+    }
+}
+
+using u8 = uint8_t;
+using s8 = int8_t;
+using u16 = uint16_t;
+using s16 = int16_t;
+using u32 = uint32_t;
+using s32 = int32_t;
+using u64 = uint64_t;
+using s64 = int64_t;
+using uint128_t = uint64_t[2];
+
+template<u32 bits> inline auto sclamp(s64 x) -> s64 {
+  enum : s64 { b = 1ull << (bits - 1), m = b - 1 };
+  return (x > m) ? m : (x < -b) ? -b : x;
+}
+
+struct RSP {
+    using r32 = uint32_t;
+    using cr32 = const r32;
+
+    union r128 {
+        struct { uint64_t u128[2]; };
+#if ARCHITECTURE_SUPPORTS_SSE4_1
+        struct {   __m128i v128; };
+
+        operator __m128i() const { return v128; }
+        auto operator=(__m128i value) { v128 = value; }
+#endif
+
+        auto byte(u32 index) -> uint8_t& { return ((uint8_t*)&u128)[15 - index]; }
+        auto byte(u32 index) const -> uint8_t { return ((uint8_t*)&u128)[15 - index]; }
+
+        auto element(u32 index) -> uint16_t& { return ((uint16_t*)&u128)[7 - index]; }
+        auto element(u32 index) const -> uint16_t { return ((uint16_t*)&u128)[7 - index]; }
+
+        auto u8(u32 index) -> uint8_t& { return ((uint8_t*)&u128)[15 - index]; }
+        auto u8(u32 index) const -> uint8_t { return ((uint8_t*)&u128)[15 - index]; }
+
+        auto s16(u32 index) -> int16_t& { return ((int16_t*)&u128)[7 - index]; }
+        auto s16(u32 index) const -> int16_t { return ((int16_t*)&u128)[7 - index]; }
+
+        auto u16(u32 index) -> uint16_t& { return ((uint16_t*)&u128)[7 - index]; }
+        auto u16(u32 index) const -> uint16_t { return ((uint16_t*)&u128)[7 - index]; }
+
+        //VCx registers
+        auto get(u32 index) const -> bool { return u16(index) != 0; }
+        auto set(u32 index, bool value) -> bool { return u16(index) = 0 - value, value; }
+
+        //vu-registers.cpp
+        inline auto operator()(u32 index) const -> r128;
+    };
+    using cr128 = const r128;
+
+    struct VU {
+        r128 r[32];
+        r128 acch, accm, accl;
+        r128 vcoh, vcol;  //16-bit little endian
+        r128 vcch, vccl;  //16-bit little endian
+        r128 vce;         // 8-bit little endian
+        s16 divin;
+        s16 divout;
+        bool divdp;
+    } vpu;
+
+    static constexpr r128 zero{0};
+    static constexpr r128 invert{(uint64_t)-1, (uint64_t)-1};
+
+    inline auto accumulatorGet(u32 index) const -> u64;
+    inline auto accumulatorSet(u32 index, u64 value) -> void;
+    inline auto accumulatorSaturate(u32 index, bool slice, u16 negative, u16 positive) const -> u16;
+
+    inline auto CFC2(r32& rt, u8 rd) -> void;
+    inline auto CTC2(cr32& rt, u8 rd) -> void;
+    template<u8 e> inline auto LBV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LDV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LFV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LHV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LLV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LPV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LQV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LRV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LSV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LTV(u8 vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LUV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto LWV(r128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto MFC2(r32& rt, cr128& vs) -> void;
+    template<u8 e> inline auto MTC2(cr32& rt, r128& vs) -> void;
+    template<u8 e> inline auto SBV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SDV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SFV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SHV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SLV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SPV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SQV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SRV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SSV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto STV(u8 vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SUV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto SWV(cr128& vt, cr32& rs, s8 imm) -> void;
+    template<u8 e> inline auto VABS(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VADD(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VADDC(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VAND(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VCH(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VCL(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VCR(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VEQ(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VGE(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VLT(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<bool U, u8 e>
+    inline auto VMACF(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMACF(r128& vd, cr128& vs, cr128& vt) -> void { VMACF<0, e>(vd, vs, vt); }
+    template<u8 e> inline auto VMACU(r128& vd, cr128& vs, cr128& vt) -> void { VMACF<1, e>(vd, vs, vt); }
+    inline auto VMACQ(r128& vd) -> void;
+    template<u8 e> inline auto VMADH(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMADL(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMADM(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMADN(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMOV(r128& vd, u8 de, cr128& vt) -> void;
+    template<u8 e> inline auto VMRG(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMUDH(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMUDL(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMUDM(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMUDN(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<bool U, u8 e>
+    inline auto VMULF(r128& rd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VMULF(r128& rd, cr128& vs, cr128& vt) -> void { VMULF<0, e>(rd, vs, vt); }
+    template<u8 e> inline auto VMULU(r128& rd, cr128& vs, cr128& vt) -> void { VMULF<1, e>(rd, vs, vt); }
+    template<u8 e> inline auto VMULQ(r128& rd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VNAND(r128& rd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VNE(r128& vd, cr128& vs, cr128& vt) -> void;
+    inline auto VNOP() -> void;
+    template<u8 e> inline auto VNOR(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VNXOR(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VOR(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<bool L, u8 e>
+    inline auto VRCP(r128& vd, u8 de, cr128& vt) -> void;
+    template<u8 e> inline auto VRCP(r128& vd, u8 de, cr128& vt) -> void { VRCP<0, e>(vd, de, vt); }
+    template<u8 e> inline auto VRCPL(r128& vd, u8 de, cr128& vt) -> void { VRCP<1, e>(vd, de, vt); }
+    template<u8 e> inline auto VRCPH(r128& vd, u8 de, cr128& vt) -> void;
+    template<bool D, u8 e>
+    inline auto VRND(r128& vd, u8 vs, cr128& vt) -> void;
+    template<u8 e> inline auto VRNDN(r128& vd, u8 vs, cr128& vt) -> void { VRND<0, e>(vd, vs, vt); }
+    template<u8 e> inline auto VRNDP(r128& vd, u8 vs, cr128& vt) -> void { VRND<1, e>(vd, vs, vt); }
+    template<bool L, u8 e>
+    inline auto VRSQ(r128& vd, u8 de, cr128& vt) -> void;
+    template<u8 e> inline auto VRSQ(r128& vd, u8 de, cr128& vt) -> void { VRSQ<0, e>(vd, de, vt); }
+    template<u8 e> inline auto VRSQL(r128& vd, u8 de, cr128& vt) -> void { VRSQ<1, e>(vd, de, vt); }
+    template<u8 e> inline auto VRSQH(r128& vd, u8 de, cr128& vt) -> void;
+    template<u8 e> inline auto VSAR(r128& vd, cr128& vs) -> void;
+    template<u8 e> inline auto VSUB(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VSUBC(r128& vd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VXOR(r128& rd, cr128& vs, cr128& vt) -> void;
+    template<u8 e> inline auto VZERO(r128& rd, cr128& vs, cr128& vt) -> void;
+};

include/rt64_layer.h

@@ -0,0 +1,61 @@
+#ifndef __RT64_LAYER_H__
+#define __RT64_LAYER_H__
+
+typedef struct {
+    unsigned char* HEADER;  /* This is the rom header (first 40h bytes of the rom) */
+    unsigned char* RDRAM;
+    unsigned char* DMEM;
+    unsigned char* IMEM;
+
+    unsigned int* MI_INTR_REG;
+
+    unsigned int* DPC_START_REG;
+    unsigned int* DPC_END_REG;
+    unsigned int* DPC_CURRENT_REG;
+    unsigned int* DPC_STATUS_REG;
+    unsigned int* DPC_CLOCK_REG;
+    unsigned int* DPC_BUFBUSY_REG;
+    unsigned int* DPC_PIPEBUSY_REG;
+    unsigned int* DPC_TMEM_REG;
+
+    unsigned int* VI_STATUS_REG;
+    unsigned int* VI_ORIGIN_REG;
+    unsigned int* VI_WIDTH_REG;
+    unsigned int* VI_INTR_REG;
+    unsigned int* VI_V_CURRENT_LINE_REG;
+    unsigned int* VI_TIMING_REG;
+    unsigned int* VI_V_SYNC_REG;
+    unsigned int* VI_H_SYNC_REG;
+    unsigned int* VI_LEAP_REG;
+    unsigned int* VI_H_START_REG;
+    unsigned int* VI_V_START_REG;
+    unsigned int* VI_V_BURST_REG;
+    unsigned int* VI_X_SCALE_REG;
+    unsigned int* VI_Y_SCALE_REG;
+
+    void (*CheckInterrupts)(void);
+
+    unsigned int version;
+    unsigned int* SP_STATUS_REG;
+    const unsigned int* RDRAM_SIZE;
+} GFX_INFO;
+
+#define DLLEXPORT extern "C" __declspec(dllexport)  
+#define DLLIMPORT extern "C" __declspec(dllimport)
+#define CALL   __cdecl
+
+// Dynamic loading
+//DLLEXPORT int (CALL *InitiateGFX)(GFX_INFO Gfx_Info) = nullptr;
+//DLLEXPORT void (CALL *ProcessRDPList)(void) = nullptr;
+//DLLEXPORT void (CALL *ProcessDList)(void) = nullptr;
+//DLLEXPORT void (CALL *UpdateScreen)(void) = nullptr;
+//DLLEXPORT void (CALL *PumpEvents)(void) = nullptr;
+
+DLLIMPORT int InitiateGFX(GFX_INFO Gfx_Info);
+DLLIMPORT void ProcessRDPList(void);
+DLLIMPORT void ProcessDList(void);
+DLLIMPORT void UpdateScreen(void);
+DLLIMPORT void PumpEvents(void);
+
+#endif
+

include/sections.h

@@ -0,0 +1,23 @@
+#ifndef __SECTIONS_H__
+#define __SECTIONS_H__
+
+#include <stdint.h>
+#include "recomp.h"
+
+#define ARRLEN(x) (sizeof(x) / sizeof((x)[0]))
+
+typedef struct {
+    recomp_func_t* func;
+    uint32_t offset;
+} FuncEntry;
+
+typedef struct {
+    uint32_t rom_addr;
+    uint32_t ram_addr;
+    uint32_t size;
+    FuncEntry *funcs;
+    size_t num_funcs;
+    size_t index;
+} SectionTableEntry;
+
+#endif

portultra/audio.cpp

@@ -0,0 +1,88 @@
+#include "ultra64.h"
+#include "multilibultra.hpp"
+#include "SDL.h"
+#include "SDL_audio.h"
+#include <cassert>
+
+static SDL_AudioDeviceID audio_device = 0;
+static uint32_t sample_rate = 48000;
+
+void Multilibultra::init_audio() {
+	// Initialize SDL audio.
+	SDL_InitSubSystem(SDL_INIT_AUDIO);
+	// Pick an initial dummy sample rate; this will be set by the game later to the true sample rate.
+	set_audio_frequency(48000);
+}
+
+void Multilibultra::set_audio_frequency(uint32_t freq) {
+	if (audio_device != 0) {
+		SDL_CloseAudioDevice(audio_device);
+	}
+	SDL_AudioSpec spec_desired{
+		.freq = (int)freq,
+		.format = AUDIO_S16,
+		.channels = 2,
+		.silence = 0, // calculated
+		.samples = 0x100, // Fairly small sample count to reduce the latency of internal buffering
+		.padding = 0, // unused
+		.size = 0, // calculated
+		.callback = nullptr,//feed_audio, // Use a callback as QueueAudio causes popping
+		.userdata = nullptr
+	};
+
+	audio_device = SDL_OpenAudioDevice(nullptr, false, &spec_desired, nullptr, 0);
+	if (audio_device == 0) {
+		printf("SDL Error: %s\n", SDL_GetError());
+		fflush(stdout);
+		assert(false);
+	}
+	SDL_PauseAudioDevice(audio_device, 0);
+	sample_rate = freq;
+}
+
+void Multilibultra::queue_audio_buffer(RDRAM_ARG PTR(s16) audio_data_, uint32_t byte_count) {
+	// Buffer for holding the output of swapping the audio channels. This is reused across
+	// calls to reduce runtime allocations.
+	static std::vector<uint16_t> swap_buffer;
+
+	// Ensure that the byte count is an integer multiple of samples.
+	assert((byte_count & 1) == 0);
+
+	// Calculate the number of samples from the number of bytes.
+	uint32_t sample_count = byte_count / sizeof(s16);
+
+	// Make sure the swap buffer is large enough to hold all the incoming audio data.
+	if (sample_count > swap_buffer.size()) {
+		swap_buffer.resize(sample_count);
+	}
+
+	// Swap the audio channels into the swap buffer to correct for the address xor caused by endianness handling.
+	s16* audio_data = TO_PTR(s16, audio_data_);
+	for (size_t i = 0; i < sample_count; i += 2) {
+		swap_buffer[i + 0] = audio_data[i + 1];
+		swap_buffer[i + 1] = audio_data[i + 0];
+	}
+
+	// Queue the swapped audio data.
+	SDL_QueueAudio(audio_device, swap_buffer.data(), byte_count);
+}
+
+// If there's ever any audio popping, check here first. Some games are very sensitive to
+// the remaining sample count and reporting a number that's too high here can lead to issues.
+// Reporting a number that's too low can lead to audio lag in some games.
+uint32_t Multilibultra::get_remaining_audio_bytes() {
+	// Get the number of remaining buffered audio bytes.
+	uint32_t buffered_byte_count = SDL_GetQueuedAudioSize(audio_device);
+	
+	// Adjust the reported count to be four refreshes in the future, which helps ensure that
+	// there are enough samples even if the game experiences a small amount of lag. This prevents
+	// audio popping on games that use the buffered audio byte count to determine how many samples
+	// to generate.
+	uint32_t samples_per_vi = (sample_rate / 60);
+	if (buffered_byte_count > (4u * samples_per_vi)) {
+		buffered_byte_count -= (4u * samples_per_vi);
+	} else {
+		buffered_byte_count = 0;
+	}
+	return buffered_byte_count;
+}

portultra/events.cpp

@@ -0,0 +1,340 @@
+#include <thread>
+#include <atomic>
+#include <chrono>
+#include <cinttypes>
+#include <variant>
+#include <unordered_map>
+#include <utility>
+#include <mutex>
+#include <queue>
+
+#include <Windows.h>
+#include "SDL.h"
+#include "blockingconcurrentqueue.h"
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+#include "recomp.h"
+#include "rsp.h"
+
+struct SpTaskAction {
+    OSTask task;
+};
+
+struct SwapBuffersAction {
+    uint32_t origin;
+};
+
+using Action = std::variant<SpTaskAction, SwapBuffersAction>;
+
+static struct {
+    struct {
+        std::thread thread;
+        PTR(OSMesgQueue) mq = NULLPTR;
+        PTR(void) current_buffer = NULLPTR;
+        PTR(void) next_buffer = NULLPTR;
+        OSMesg msg = (OSMesg)0;
+        int retrace_count = 1;
+    } vi;
+    struct {
+        std::thread thread;
+        PTR(OSMesgQueue) mq = NULLPTR;
+        OSMesg msg = (OSMesg)0;
+    } sp;
+    struct {
+        std::thread thread;
+        PTR(OSMesgQueue) mq = NULLPTR;
+        OSMesg msg = (OSMesg)0;
+    } dp;
+    struct {
+        std::thread thread;
+        PTR(OSMesgQueue) mq = NULLPTR;
+        OSMesg msg = (OSMesg)0;
+    } ai;
+    struct {
+        std::thread thread;
+        PTR(OSMesgQueue) mq = NULLPTR;
+        OSMesg msg = (OSMesg)0;
+    } si;
+    // The same message queue may be used for multiple events, so share a mutex for all of them
+    std::mutex message_mutex;
+    uint8_t* rdram;
+    moodycamel::BlockingConcurrentQueue<Action> action_queue{};
+} events_context{};
+
+extern "C" void osSetEventMesg(RDRAM_ARG OSEvent event_id, PTR(OSMesgQueue) mq_, OSMesg msg) {
+    OSMesgQueue* mq = TO_PTR(OSMesgQueue, mq_);
+    std::lock_guard lock{ events_context.message_mutex };
+
+    switch (event_id) {
+        case OS_EVENT_SP:
+            events_context.sp.msg = msg;
+            events_context.sp.mq = mq_;
+            break;
+        case OS_EVENT_DP:
+            events_context.dp.msg = msg;
+            events_context.dp.mq = mq_;
+            break;
+        case OS_EVENT_AI:
+            events_context.ai.msg = msg;
+            events_context.ai.mq = mq_;
+            break;
+        case OS_EVENT_SI:
+            events_context.si.msg = msg;
+            events_context.si.mq = mq_;
+    }
+}
+
+extern "C" void osViSetEvent(RDRAM_ARG PTR(OSMesgQueue) mq_, OSMesg msg, u32 retrace_count) {
+    std::lock_guard lock{ events_context.message_mutex };
+    events_context.vi.mq = mq_;
+    events_context.vi.msg = msg;
+    events_context.vi.retrace_count = retrace_count;
+}
+
+void vi_thread_func() {
+    using namespace std::chrono_literals;
+    
+    uint64_t total_vis = 0;
+    int remaining_retraces = events_context.vi.retrace_count;
+
+    while (true) {
+        // Determine the next VI time (more accurate than adding 16ms each VI interrupt)
+        auto next = Multilibultra::get_start() + (total_vis * 1000000us) / (60 * Multilibultra::get_speed_multiplier());
+        //if (next > std::chrono::system_clock::now()) {
+        //    printf("Sleeping for %" PRIu64 " us to get from %" PRIu64 " us to %" PRIu64 " us \n",
+        //        (next - std::chrono::system_clock::now()) / 1us,
+        //        (std::chrono::system_clock::now() - events_context.start) / 1us,
+        //        (next - events_context.start) / 1us);
+        //} else {
+        //    printf("No need to sleep\n");
+        //}
+        std::this_thread::sleep_until(next);
+        // Calculate how many VIs have passed
+        uint64_t new_total_vis = (Multilibultra::time_since_start() * (60 * Multilibultra::get_speed_multiplier()) / 1000ms) + 1;
+        if (new_total_vis > total_vis + 1) {
+            //printf("Skipped % " PRId64 " frames in VI interupt thread!\n", new_total_vis - total_vis - 1);
+        }
+        total_vis = new_total_vis;
+
+        remaining_retraces--;
+
+        {
+            std::lock_guard lock{ events_context.message_mutex };
+            uint8_t* rdram = events_context.rdram;
+            if (remaining_retraces == 0) {
+                remaining_retraces = events_context.vi.retrace_count;
+
+                if (events_context.vi.mq != NULLPTR) {
+                    if (osSendMesg(PASS_RDRAM events_context.vi.mq, events_context.vi.msg, OS_MESG_NOBLOCK) == -1) {
+                        //printf("Game skipped a VI frame!\n");
+                    }
+                }
+            }
+            if (events_context.ai.mq != NULLPTR) {
+                if (osSendMesg(PASS_RDRAM events_context.ai.mq, events_context.ai.msg, OS_MESG_NOBLOCK) == -1) {
+                    //printf("Game skipped a AI frame!\n");
+                }
+            }
+        }
+    }
+}
+
+void sp_complete() {
+    uint8_t* rdram = events_context.rdram;
+    std::lock_guard lock{ events_context.message_mutex };
+    osSendMesg(PASS_RDRAM events_context.sp.mq, events_context.sp.msg, OS_MESG_NOBLOCK);
+}
+
+void dp_complete() {
+    uint8_t* rdram = events_context.rdram;
+    std::lock_guard lock{ events_context.message_mutex };
+    osSendMesg(PASS_RDRAM events_context.dp.mq, events_context.dp.msg, OS_MESG_NOBLOCK);
+}
+
+void RT64Init(uint8_t* rom, uint8_t* rdram);
+void RT64SendDL(uint8_t* rdram, const OSTask* task);
+void RT64UpdateScreen(uint32_t vi_origin);
+
+std::unordered_map<SDL_Scancode, int> button_map{
+    { SDL_Scancode::SDL_SCANCODE_LEFT,   0x0002 }, // c left
+    { SDL_Scancode::SDL_SCANCODE_RIGHT,  0x0001 }, // c right
+    { SDL_Scancode::SDL_SCANCODE_UP,     0x0008 }, // c up
+    { SDL_Scancode::SDL_SCANCODE_DOWN,   0x0004 }, // c down
+    { SDL_Scancode::SDL_SCANCODE_RETURN, 0x1000 }, // start
+    { SDL_Scancode::SDL_SCANCODE_SPACE,  0x8000 }, // a
+    { SDL_Scancode::SDL_SCANCODE_LSHIFT, 0x4000 }, // b
+    { SDL_Scancode::SDL_SCANCODE_Q,      0x2000 }, // z
+    { SDL_Scancode::SDL_SCANCODE_E,      0x0020 }, // l
+    { SDL_Scancode::SDL_SCANCODE_R,      0x0010 }, // r
+    { SDL_Scancode::SDL_SCANCODE_J,      0x0200 }, // dpad left
+    { SDL_Scancode::SDL_SCANCODE_L,      0x0100 }, // dpad right
+    { SDL_Scancode::SDL_SCANCODE_I,      0x0800 }, // dpad up
+    { SDL_Scancode::SDL_SCANCODE_K,      0x0400 }, // dpad down
+};
+
+extern int button;
+extern int stick_x;
+extern int stick_y;
+
+int sdl_event_filter(void* userdata, SDL_Event* event) {
+    switch (event->type) {
+    case SDL_EventType::SDL_KEYUP:
+    case SDL_EventType::SDL_KEYDOWN:
+        {
+            const Uint8* key_states = SDL_GetKeyboardState(nullptr);
+            int new_button = 0;
+
+            for (const auto& mapping : button_map) {
+                if (key_states[mapping.first]) {
+                    new_button |= mapping.second;
+                }
+            }
+
+            button = new_button;
+
+            stick_x = 127 * (key_states[SDL_Scancode::SDL_SCANCODE_D] - key_states[SDL_Scancode::SDL_SCANCODE_A]);
+            stick_y = 127 * (key_states[SDL_Scancode::SDL_SCANCODE_W] - key_states[SDL_Scancode::SDL_SCANCODE_S]);
+        }
+        break;
+    case SDL_EventType::SDL_QUIT:
+        std::quick_exit(ERROR_SUCCESS);
+        break;
+    }
+    return 1;
+}
+
+uint8_t dmem[0x1000];
+uint16_t rspReciprocals[512];
+uint16_t rspInverseSquareRoots[512];
+
+using RspUcodeFunc = RspExitReason(uint8_t* rdram);
+extern RspUcodeFunc njpgdspMain;
+extern RspUcodeFunc aspMain;
+
+// From Ares emulator. For license details, see rsp_vu.h
+void rsp_constants_init() {
+    rspReciprocals[0] = u16(~0);
+    for (u16 index = 1; index < 512; index++) {
+        u64 a = index + 512;
+        u64 b = (u64(1) << 34) / a;
+        rspReciprocals[index] = u16(b + 1 >> 8);
+    }
+
+    for (u16 index = 0; index < 512; index++) {
+        u64 a = index + 512 >> ((index % 2 == 1) ? 1 : 0);
+        u64 b = 1 << 17;
+        //find the largest b where b < 1.0 / sqrt(a)
+        while (a * (b + 1) * (b + 1) < (u64(1) << 44)) b++;
+        rspInverseSquareRoots[index] = u16(b >> 1);
+    }
+}
+
+// Runs a recompiled RSP microcode
+void run_rsp_microcode(uint8_t* rdram, const OSTask* task, RspUcodeFunc* ucode_func) {
+    // Load the OSTask into DMEM
+    memcpy(&dmem[0xFC0], task, sizeof(OSTask));
+    // Load the ucode data into DMEM
+    dma_rdram_to_dmem(rdram, 0x0000, task->t.ucode_data, 0xF80 - 1);
+    // Run the ucode
+    RspExitReason exit_reason = ucode_func(rdram);
+    // Ensure that the ucode exited correctly
+    assert(exit_reason == RspExitReason::Broke);
+    sp_complete();
+}
+
+void event_thread_func(uint8_t* rdram, uint8_t* rom, std::atomic_flag* events_thread_ready) {
+    using namespace std::chrono_literals;
+    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
+        fprintf(stderr, "Failed to initialize SDL2: %s\n", SDL_GetError());
+        std::quick_exit(EXIT_FAILURE);
+    }
+    RT64Init(rom, rdram);
+    SDL_Window* window = SDL_GetWindowFromID(1);
+    // TODO set this window title in RT64, create the window here and send it to RT64, or something else entirely
+    // as the current window name visibly changes as RT64 is initialized
+    SDL_SetWindowTitle(window, "Recomp");
+    //SDL_SetEventFilter(sdl_event_filter, nullptr);
+
+    rsp_constants_init();
+
+    // Notify the caller thread that this thread is ready.
+    events_thread_ready->test_and_set();
+    events_thread_ready->notify_all();
+
+    while (true) {
+        // Try to pull an action from the queue
+        Action action;
+        if (events_context.action_queue.wait_dequeue_timed(action, 1ms)) {
+            // Determine the action type and act on it
+            if (const auto* task_action = std::get_if<SpTaskAction>(&action)) {
+                if (task_action->task.t.type == M_GFXTASK) {
+                    // (TODO let RT64 do this) Tell the game that the RSP and RDP tasks are complete
+                    RT64SendDL(rdram, &task_action->task);
+                    sp_complete();
+                    dp_complete();
+                } else if (task_action->task.t.type == M_AUDTASK) {
+                    run_rsp_microcode(rdram, &task_action->task, aspMain);
+                } else if (task_action->task.t.type == M_NJPEGTASK) {
+                    run_rsp_microcode(rdram, &task_action->task, njpgdspMain);
+                } else {
+                    fprintf(stderr, "Unknown task type: %" PRIu32 "\n", task_action->task.t.type);
+                    assert(false);
+                    std::quick_exit(EXIT_FAILURE);
+                }
+            } else if (const auto* swap_action = std::get_if<SwapBuffersAction>(&action)) {
+                static volatile int i = 0;
+                if (i >= 100) {
+                    i = 0;
+                }
+                i++;
+                events_context.vi.current_buffer = events_context.vi.next_buffer;
+                RT64UpdateScreen(swap_action->origin);
+            }
+        }
+
+        // Handle events
+        constexpr int max_events_per_frame = 16;
+        SDL_Event cur_event;
+        int i = 0;
+        while (i++ < max_events_per_frame && SDL_PollEvent(&cur_event)) {
+            sdl_event_filter(nullptr, &cur_event);
+        }
+        //SDL_PumpEvents();
+    }
+}
+
+extern "C" void osViSwapBuffer(RDRAM_ARG PTR(void) frameBufPtr) {
+    events_context.vi.next_buffer = frameBufPtr;
+    events_context.action_queue.enqueue(SwapBuffersAction{ osVirtualToPhysical(frameBufPtr) + 640 });
+}
+
+extern "C" PTR(void) osViGetNextFramebuffer() {
+    return events_context.vi.next_buffer;
+}
+
+extern "C" PTR(void) osViGetCurrentFramebuffer() {
+    return events_context.vi.current_buffer;
+}
+
+void Multilibultra::submit_rsp_task(RDRAM_ARG PTR(OSTask) task_) {
+    OSTask* task = TO_PTR(OSTask, task_);
+    events_context.action_queue.enqueue(SpTaskAction{ *task });
+}
+
+void Multilibultra::send_si_message() {
+    uint8_t* rdram = events_context.rdram;
+    osSendMesg(PASS_RDRAM events_context.si.mq, events_context.si.msg, OS_MESG_NOBLOCK);
+}
+
+void Multilibultra::init_events(uint8_t* rdram, uint8_t* rom) {
+    std::atomic_flag events_thread_ready;
+    events_context.rdram = rdram;
+    events_context.sp.thread = std::thread{ event_thread_func, rdram, rom, &events_thread_ready };
+    
+    // Wait for the event thread to be ready before continuing to prevent the game from
+    // running before we're able to handle RSP tasks.
+    events_thread_ready.wait(false);
+
+    events_context.vi.thread = std::thread{ vi_thread_func };
+}

portultra/mesgqueue.cpp

@@ -0,0 +1,194 @@
+#include <thread>
+#include <atomic>
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+#include "recomp.h"
+
+extern "C" void osCreateMesgQueue(RDRAM_ARG PTR(OSMesgQueue) mq_, PTR(OSMesg) msg, s32 count) {
+    OSMesgQueue *mq = TO_PTR(OSMesgQueue, mq_);
+    mq->blocked_on_recv = NULLPTR;
+    mq->blocked_on_send = NULLPTR;
+    mq->msgCount = count;
+    mq->msg = msg;
+    mq->validCount = 0;
+    mq->first = 0;
+}
+
+s32 MQ_GET_COUNT(OSMesgQueue *mq) {
+    return mq->validCount;
+}
+
+s32 MQ_IS_EMPTY(OSMesgQueue *mq) {
+    return mq->validCount == 0;
+}
+
+s32 MQ_IS_FULL(OSMesgQueue* mq) {
+    return MQ_GET_COUNT(mq) >= mq->msgCount;
+}
+
+void thread_queue_insert(RDRAM_ARG PTR(OSThread)* queue, PTR(OSThread) toadd_) {
+    PTR(OSThread)* cur = queue;
+    OSThread* toadd = TO_PTR(OSThread, toadd_); 
+    while (*cur && TO_PTR(OSThread, *cur)->priority > toadd->priority) {
+        cur = &TO_PTR(OSThread, *cur)->next;
+    }
+    toadd->next = (*cur);
+    *cur = toadd_;
+}
+
+OSThread* thread_queue_pop(RDRAM_ARG PTR(OSThread)* queue) {
+    PTR(OSThread) ret = *queue;
+    *queue = TO_PTR(OSThread, ret)->next;
+    return TO_PTR(OSThread, ret);
+}
+
+bool thread_queue_empty(RDRAM_ARG PTR(OSThread)* queue) {
+    return *queue == NULLPTR;
+}
+
+extern "C" s32 osSendMesg(RDRAM_ARG PTR(OSMesgQueue) mq_, OSMesg msg, s32 flags) {
+    OSMesgQueue *mq = TO_PTR(OSMesgQueue, mq_);
+    
+    // Prevent accidentally blocking anything that isn't a game thread
+    if (!Multilibultra::is_game_thread()) {
+        flags = OS_MESG_NOBLOCK;
+    }
+
+    Multilibultra::disable_preemption();
+
+    if (flags == OS_MESG_NOBLOCK) {
+        // If non-blocking, fail if the queue is full
+        if (MQ_IS_FULL(mq)) {
+            Multilibultra::enable_preemption();
+            return -1;
+        }
+    } else {
+        // Otherwise, yield this thread until the queue has room
+        while (MQ_IS_FULL(mq)) {
+            debug_printf("[Message Queue] Thread %d is blocked on send\n", TO_PTR(OSThread, Multilibultra::this_thread())->id);
+            thread_queue_insert(PASS_RDRAM &mq->blocked_on_send, Multilibultra::this_thread());
+            Multilibultra::enable_preemption();
+            Multilibultra::pause_self(PASS_RDRAM1);
+            Multilibultra::disable_preemption();
+        }
+    }
+    
+    s32 last = (mq->first + mq->validCount) % mq->msgCount;
+    TO_PTR(OSMesg, mq->msg)[last] = msg;
+    mq->validCount++;
+    
+    OSThread* to_run = nullptr;
+
+    if (!thread_queue_empty(PASS_RDRAM &mq->blocked_on_recv)) {
+        to_run = thread_queue_pop(PASS_RDRAM &mq->blocked_on_recv);
+    }
+    
+    Multilibultra::enable_preemption();
+    if (to_run) {
+        debug_printf("[Message Queue] Thread %d is unblocked\n", to_run->id);
+        if (Multilibultra::is_game_thread()) {
+            OSThread* self = TO_PTR(OSThread, Multilibultra::this_thread());
+            if (to_run->priority > self->priority) {
+                Multilibultra::swap_to_thread(PASS_RDRAM to_run);
+            } else {
+                Multilibultra::schedule_running_thread(to_run);
+            }
+        } else {
+            Multilibultra::schedule_running_thread(to_run);
+        }
+    }
+    return 0;
+}
+
+extern "C" s32 osJamMesg(RDRAM_ARG PTR(OSMesgQueue) mq_, OSMesg msg, s32 flags) {
+    OSMesgQueue *mq = TO_PTR(OSMesgQueue, mq_);
+    Multilibultra::disable_preemption();
+
+    if (flags == OS_MESG_NOBLOCK) {
+        // If non-blocking, fail if the queue is full
+        if (MQ_IS_FULL(mq)) {
+            Multilibultra::enable_preemption();
+            return -1;
+        }
+    } else {
+        // Otherwise, yield this thread in a loop until the queue is no longer full
+        while (MQ_IS_FULL(mq)) {
+            debug_printf("[Message Queue] Thread %d is blocked on jam\n", TO_PTR(OSThread, Multilibultra::this_thread())->id);
+            thread_queue_insert(PASS_RDRAM &mq->blocked_on_send, Multilibultra::this_thread());
+            Multilibultra::enable_preemption();
+            Multilibultra::pause_self(PASS_RDRAM1);
+            Multilibultra::disable_preemption();
+        }
+    }
+    
+    mq->first = (mq->first + mq->msgCount - 1) % mq->msgCount;
+    TO_PTR(OSMesg, mq->msg)[mq->first] = msg;
+    mq->validCount++;
+    
+    OSThread *to_run = nullptr;
+
+    if (!thread_queue_empty(PASS_RDRAM &mq->blocked_on_recv)) {
+        to_run = thread_queue_pop(PASS_RDRAM &mq->blocked_on_recv);
+    }
+    
+    Multilibultra::enable_preemption();
+    if (to_run) {
+        debug_printf("[Message Queue] Thread %d is unblocked\n", to_run->id);
+        OSThread *self = TO_PTR(OSThread, Multilibultra::this_thread());
+        if (to_run->priority > self->priority) {
+            Multilibultra::swap_to_thread(PASS_RDRAM to_run);
+        } else {
+            Multilibultra::schedule_running_thread(to_run);
+        }
+    }
+    return 0;
+}
+
+extern "C" s32 osRecvMesg(RDRAM_ARG PTR(OSMesgQueue) mq_, PTR(OSMesg) msg_, s32 flags) {
+    OSMesgQueue *mq = TO_PTR(OSMesgQueue, mq_);
+    OSMesg *msg = TO_PTR(OSMesg, msg_);
+    Multilibultra::disable_preemption();
+
+    if (flags == OS_MESG_NOBLOCK) {
+        // If non-blocking, fail if the queue is empty
+        if (MQ_IS_EMPTY(mq)) {
+            Multilibultra::enable_preemption();
+            return -1;
+        }
+    } else {
+        // Otherwise, yield this thread in a loop until the queue is no longer full
+        while (MQ_IS_EMPTY(mq)) {
+            debug_printf("[Message Queue] Thread %d is blocked on receive\n", TO_PTR(OSThread, Multilibultra::this_thread())->id);
+            thread_queue_insert(PASS_RDRAM &mq->blocked_on_recv, Multilibultra::this_thread());
+            Multilibultra::enable_preemption();
+            Multilibultra::pause_self(PASS_RDRAM1);
+            Multilibultra::disable_preemption();
+        }
+    }
+
+    if (msg_ != NULLPTR) {
+        *msg = TO_PTR(OSMesg, mq->msg)[mq->first];
+    }
+    
+    mq->first = (mq->first + 1) % mq->msgCount;
+    mq->validCount--;
+
+    OSThread *to_run = nullptr;
+
+    if (!thread_queue_empty(PASS_RDRAM &mq->blocked_on_send)) {
+        to_run = thread_queue_pop(PASS_RDRAM &mq->blocked_on_send);
+    }
+    
+    Multilibultra::enable_preemption();
+    if (to_run) {
+        debug_printf("[Message Queue] Thread %d is unblocked\n", to_run->id);
+        OSThread *self = TO_PTR(OSThread, Multilibultra::this_thread());
+        if (to_run->priority > self->priority) {
+            Multilibultra::swap_to_thread(PASS_RDRAM to_run);
+        } else {
+            Multilibultra::schedule_running_thread(to_run);
+        }
+    }
+    return 0;
+}

portultra/misc_ultra.cpp

@@ -0,0 +1,22 @@
+#include "ultra64.h"
+
+#define	K0BASE		0x80000000
+#define	K1BASE		0xA0000000
+#define	K2BASE		0xC0000000
+#define	IS_KSEG0(x)	((u32)(x) >= K0BASE && (u32)(x) < K1BASE)
+#define	IS_KSEG1(x)	((u32)(x) >= K1BASE && (u32)(x) < K2BASE)
+#define	K0_TO_PHYS(x)	((u32)(x)&0x1FFFFFFF)	/* kseg0 to physical */
+#define	K1_TO_PHYS(x)	((u32)(x)&0x1FFFFFFF)	/* kseg1 to physical */
+
+u32 osVirtualToPhysical(PTR(void) addr) {
+    uintptr_t addr_val = (uintptr_t)addr;
+    if (IS_KSEG0(addr_val)) {
+        return K0_TO_PHYS(addr_val);
+    } else if (IS_KSEG1(addr_val)) {
+        return K1_TO_PHYS(addr_val);
+    } else {
+        // TODO handle TLB mappings
+        return (u32)addr_val;
+    }
+}
+

portultra/multilibultra.hpp

@@ -0,0 +1,75 @@
+#ifndef __MULTILIBULTRA_HPP__
+#define __MULTILIBULTRA_HPP__
+
+#include <thread>
+#include <atomic>
+#include <mutex>
+#include <algorithm>
+
+#include "ultra64.h"
+#include "platform_specific.h"
+
+struct UltraThreadContext {
+    std::thread host_thread;
+    std::atomic_bool running;
+    std::atomic_bool initialized;
+};
+
+namespace Multilibultra {
+
+// We need a place in rdram to hold the PI handles, so pick an address in extended rdram
+constexpr int32_t cart_handle = 0x80800000;
+constexpr int32_t flash_handle = (int32_t)(cart_handle + sizeof(OSPiHandle));
+constexpr uint32_t save_size = 1024 * 1024 / 8; // Maximum save size, 1Mbit for flash
+
+void preinit(uint8_t* rdram, uint8_t* rom);
+void save_init();
+void native_init();
+void init_scheduler();
+void init_events(uint8_t* rdram, uint8_t* rom);
+void init_timers(RDRAM_ARG1);
+void native_thread_init(OSThread *t);
+void set_self_paused(RDRAM_ARG1);
+void wait_for_resumed(RDRAM_ARG1);
+void swap_to_thread(RDRAM_ARG OSThread *to);
+void pause_thread_impl(OSThread *t);
+void pause_thread_native_impl(OSThread *t);
+void resume_thread_impl(OSThread *t);
+void resume_thread_native_impl(OSThread *t);
+void schedule_running_thread(OSThread *t);
+void stop_thread(OSThread *t);
+void pause_self(RDRAM_ARG1);
+void cleanup_thread(OSThread *t);
+PTR(OSThread) this_thread();
+void disable_preemption();
+void enable_preemption();
+void notify_scheduler();
+void reprioritize_thread(OSThread *t, OSPri pri);
+void set_main_thread();
+bool is_game_thread();
+void submit_rsp_task(RDRAM_ARG PTR(OSTask) task);
+void send_si_message();
+uint32_t get_speed_multiplier();
+std::chrono::system_clock::time_point get_start();
+std::chrono::system_clock::duration time_since_start();
+void init_audio();
+void set_audio_frequency(uint32_t freq);
+void queue_audio_buffer(RDRAM_ARG PTR(s16) audio_data, uint32_t byte_count);
+uint32_t get_remaining_audio_bytes();
+
+class preemption_guard {
+public:
+    preemption_guard();
+    ~preemption_guard();
+private:
+    std::lock_guard<std::mutex> lock;
+};
+
+} // namespace Multilibultra
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+#define debug_printf(...)
+//#define debug_printf(...) printf(__VA_ARGS__);
+
+#endif

portultra/platform_specific.h

@@ -0,0 +1,32 @@
+#ifndef __PLATFORM_SPECIFIC_H__
+#define __PLATFORM_SPECIFIC_H__
+
+#if defined(__linux__)
+
+//#include <pthread.h>
+//
+//typedef struct {
+//    pthread_t t;
+//    pthread_barrier_t pause_barrier;
+//    pthread_mutex_t pause_mutex;
+//    pthread_cond_t pause_cond;
+//    void (*entrypoint)(void *);
+//    void *arg;
+//} OSThreadNative;
+
+#elif defined(_WIN32)
+
+//#include <pthread.h>
+//
+//typedef struct {
+//    pthread_t t;
+//    pthread_barrier_t pause_barrier;
+//    pthread_mutex_t pause_mutex;
+//    pthread_cond_t pause_cond;
+//    void (*entrypoint)(void*);
+//    void* arg;
+//} OSThreadNative;
+
+#endif
+
+#endif

portultra/port_main.c

@@ -0,0 +1,83 @@
+#if 0
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "ultra64.h"
+
+#define THREAD_STACK_SIZE 0x1000
+
+u8 idle_stack[THREAD_STACK_SIZE] ALIGNED(16);
+u8 main_stack[THREAD_STACK_SIZE] ALIGNED(16);
+u8 thread3_stack[THREAD_STACK_SIZE] ALIGNED(16);
+u8 thread4_stack[THREAD_STACK_SIZE] ALIGNED(16);
+
+OSThread idle_thread;
+OSThread main_thread;
+OSThread thread3;
+OSThread thread4;
+
+OSMesgQueue queue;
+OSMesg buf[1];
+
+void thread3_func(UNUSED void *arg) {
+    OSMesg val;
+    printf("Thread3 recv\n");
+    fflush(stdout);
+    osRecvMesg(&queue, &val, OS_MESG_BLOCK);
+    printf("Thread3 complete: %d\n", (int)(intptr_t)val);
+    fflush(stdout);
+}
+
+void thread4_func(void *arg) {
+    printf("Thread4 send %d\n", (int)(intptr_t)arg);
+    fflush(stdout);
+    osSendMesg(&queue, arg, OS_MESG_BLOCK);
+    printf("Thread4 complete\n");
+    fflush(stdout);
+}
+
+void main_thread_func(UNUSED void* arg) {
+    osCreateMesgQueue(&queue, buf, sizeof(buf) / sizeof(buf[0]));
+
+    printf("main thread creating thread 3\n");
+    osCreateThread(&thread3, 3, thread3_func, NULL, &thread3_stack[THREAD_STACK_SIZE], 14);
+    printf("main thread starting thread 3\n");
+    osStartThread(&thread3);
+    
+    printf("main thread creating thread 4\n");
+    osCreateThread(&thread4, 4, thread4_func, (void*)10, &thread4_stack[THREAD_STACK_SIZE], 13);
+    printf("main thread starting thread 4\n");
+    osStartThread(&thread4);
+
+    while (1) {
+        printf("main thread doin stuff\n");
+        sleep(1);
+    }
+}
+
+void idle_thread_func(UNUSED void* arg) {
+    printf("idle thread\n");
+    printf("creating main thread\n");
+    osCreateThread(&main_thread, 2, main_thread_func, NULL, &main_stack[THREAD_STACK_SIZE], 11);
+    printf("starting main thread\n");
+    osStartThread(&main_thread);
+
+    // Set this thread's priority to 0, making it the idle thread
+    osSetThreadPri(NULL, 0);
+
+    // idle
+    while (1) {
+        printf("idle thread doin stuff\n");
+        sleep(1);
+    }
+}
+
+void bootproc(void) {
+    osInitialize();
+    
+    osCreateThread(&idle_thread, 1, idle_thread_func, NULL, &idle_stack[THREAD_STACK_SIZE], 127);
+    printf("Starting idle thread\n");
+    osStartThread(&idle_thread);
+}
+
+#endif

portultra/scheduler.cpp

@@ -0,0 +1,286 @@
+#include <thread>
+#include <queue>
+#include <atomic>
+#include <vector>
+
+#include "multilibultra.hpp"
+
+class OSThreadComparator {
+public:
+    bool operator() (OSThread *a, OSThread *b) const {
+        return a->priority < b->priority;
+    }
+};
+
+class thread_queue_t : public std::priority_queue<OSThread*, std::vector<OSThread*>, OSThreadComparator> {
+public:
+    // TODO comment this
+    bool remove(const OSThread* value) {
+        auto it = std::find(this->c.begin(), this->c.end(), value);
+    
+        if (it == this->c.end()) {
+            return false;
+        }
+
+        if (it == this->c.begin()) {
+            // deque the top element
+            this->pop();
+        } else {
+            // remove element and re-heap
+            this->c.erase(it);
+            std::make_heap(this->c.begin(), this->c.end(), this->comp);
+        }
+        
+        return true;
+    }
+};
+
+static struct {
+    std::vector<OSThread*> to_schedule;
+    std::vector<OSThread*> to_stop;
+    std::vector<OSThread*> to_cleanup;
+    std::vector<std::pair<OSThread*, OSPri>> to_reprioritize;
+    std::mutex mutex;
+    // OSThread* running_thread;
+    std::atomic_int notify_count;
+    std::atomic_int action_count;
+
+    bool can_preempt;
+    std::mutex premption_mutex;
+} scheduler_context{};
+
+void handle_thread_queueing(thread_queue_t& running_thread_queue) {
+    std::lock_guard lock{scheduler_context.mutex};
+
+    if (!scheduler_context.to_schedule.empty()) {
+        OSThread* to_schedule = scheduler_context.to_schedule.back();
+        scheduler_context.to_schedule.pop_back();
+        scheduler_context.action_count.fetch_sub(1);
+        debug_printf("[Scheduler] Scheduling thread %d\n", to_schedule->id);
+        running_thread_queue.push(to_schedule);
+    }
+}
+
+void handle_thread_stopping(thread_queue_t& running_thread_queue) {
+    std::lock_guard lock{scheduler_context.mutex};
+
+    while (!scheduler_context.to_stop.empty()) {
+        OSThread* to_stop = scheduler_context.to_stop.back();
+        scheduler_context.to_stop.pop_back();
+        scheduler_context.action_count.fetch_sub(1);
+        debug_printf("[Scheduler] Stopping thread %d\n", to_stop->id);
+        running_thread_queue.remove(to_stop);
+    }
+}
+
+void handle_thread_cleanup(thread_queue_t& running_thread_queue) {
+    std::lock_guard lock{scheduler_context.mutex};
+
+    while (!scheduler_context.to_cleanup.empty()) {
+        OSThread* to_cleanup = scheduler_context.to_cleanup.back();
+        scheduler_context.to_cleanup.pop_back();
+        scheduler_context.action_count.fetch_sub(1);
+        
+        debug_printf("[Scheduler] Destroying thread %d\n", to_cleanup->id);
+        running_thread_queue.remove(to_cleanup);
+        to_cleanup->context->host_thread.join();
+        delete to_cleanup->context;
+    }
+}
+
+void handle_thread_reprioritization(thread_queue_t& running_thread_queue) {
+    std::lock_guard lock{scheduler_context.mutex};
+
+    while (!scheduler_context.to_reprioritize.empty()) {
+        const std::pair<OSThread*, OSPri> to_reprioritize = scheduler_context.to_reprioritize.back();
+        scheduler_context.to_reprioritize.pop_back();
+        scheduler_context.action_count.fetch_sub(1);
+        
+        debug_printf("[Scheduler] Reprioritizing thread %d to %d\n", to_reprioritize.first->id, to_reprioritize.second);
+        running_thread_queue.remove(to_reprioritize.first);
+        to_reprioritize.first->priority = to_reprioritize.second;
+        running_thread_queue.push(to_reprioritize.first);
+    }
+}
+
+void handle_scheduler_notifications() {
+    std::lock_guard lock{scheduler_context.mutex};
+    int32_t notify_count = scheduler_context.notify_count.exchange(0);
+    if (notify_count) {
+        debug_printf("Received %d notifications\n", notify_count);
+        scheduler_context.action_count.fetch_sub(notify_count);
+    }
+}
+
+void swap_running_thread(thread_queue_t& running_thread_queue, OSThread*& cur_running_thread) {
+    if (running_thread_queue.size() > 0) {
+        OSThread* new_running_thread = running_thread_queue.top();
+        if (cur_running_thread != new_running_thread) {
+            if (cur_running_thread && cur_running_thread->state == OSThreadState::RUNNING) {
+                debug_printf("[Scheduler] Need to wait for thread %d to pause itself\n", cur_running_thread->id);
+                return;
+                //debug_printf("[Scheduler] Switching execution from thread %d (%d) to thread %d (%d)\n",
+                //    cur_running_thread->id, cur_running_thread->priority,
+                //    new_running_thread->id, new_running_thread->priority);
+                //Multilibultra::pause_thread_impl(cur_running_thread);
+            } else {
+                debug_printf("[Scheduler] Switching execution to thread %d (%d)\n", new_running_thread->id, new_running_thread->priority);
+            }
+            Multilibultra::resume_thread_impl(new_running_thread);
+            cur_running_thread = new_running_thread;
+        } else if (cur_running_thread && cur_running_thread->state != OSThreadState::RUNNING) {
+            Multilibultra::resume_thread_impl(cur_running_thread);
+        }
+    } else {
+        cur_running_thread = nullptr;
+    }
+}
+
+void scheduler_func() {
+    thread_queue_t running_thread_queue{};
+    OSThread* cur_running_thread = nullptr;
+
+    while (true) {
+        OSThread* old_running_thread = cur_running_thread;
+        scheduler_context.action_count.wait(0);
+
+        std::lock_guard lock{scheduler_context.premption_mutex};
+        
+        // Handle notifications
+        handle_scheduler_notifications();
+
+        // Handle stopping threads
+        handle_thread_stopping(running_thread_queue);
+
+        // Handle cleaning up threads
+        handle_thread_cleanup(running_thread_queue);
+
+        // Handle queueing threads to run
+        handle_thread_queueing(running_thread_queue);
+
+        // Handle threads that have changed priority
+        handle_thread_reprioritization(running_thread_queue);
+
+        // Determine which thread to run, stopping the current running thread if necessary
+        swap_running_thread(running_thread_queue, cur_running_thread);
+
+        std::this_thread::yield();
+        if (old_running_thread != cur_running_thread && old_running_thread && cur_running_thread) {
+            debug_printf("[Scheduler] Swapped from Thread %d (%d) to Thread %d (%d)\n",
+                old_running_thread->id, old_running_thread->priority, cur_running_thread->id, cur_running_thread->priority);
+        }
+    }
+}
+
+extern "C" void do_yield() {
+    std::this_thread::yield();
+}
+
+namespace Multilibultra {
+
+void init_scheduler() {
+    scheduler_context.can_preempt = true;
+    std::thread scheduler_thread{scheduler_func};
+    scheduler_thread.detach();
+}
+
+void schedule_running_thread(OSThread *t) {
+    debug_printf("[Scheduler] Queuing Thread %d to be scheduled\n", t->id);
+    std::lock_guard lock{scheduler_context.mutex};
+    scheduler_context.to_schedule.push_back(t);
+    scheduler_context.action_count.fetch_add(1);
+    scheduler_context.action_count.notify_all();
+}
+
+void swap_to_thread(RDRAM_ARG OSThread *to) {
+    OSThread *self = TO_PTR(OSThread, Multilibultra::this_thread());
+    debug_printf("[Scheduler] Scheduling swap from thread %d to %d\n", self->id, to->id);
+    {
+        std::lock_guard lock{scheduler_context.mutex};
+        scheduler_context.to_schedule.push_back(to);
+        Multilibultra::set_self_paused(PASS_RDRAM1);
+        scheduler_context.action_count.fetch_add(1);
+        scheduler_context.action_count.notify_all();
+    }
+    Multilibultra::wait_for_resumed(PASS_RDRAM1);
+}
+
+void reprioritize_thread(OSThread *t, OSPri pri) {
+    debug_printf("[Scheduler] Adjusting Thread %d priority to %d\n", t->id, pri);
+    std::lock_guard lock{scheduler_context.mutex};
+    scheduler_context.to_reprioritize.emplace_back(t, pri);
+    scheduler_context.action_count.fetch_add(1);
+    scheduler_context.action_count.notify_all();
+}
+
+void pause_self(RDRAM_ARG1) {
+    OSThread *self = TO_PTR(OSThread, Multilibultra::this_thread());
+    debug_printf("[Scheduler] Thread %d pausing itself\n", self->id);
+    {
+        std::lock_guard lock{scheduler_context.mutex};
+        Multilibultra::set_self_paused(PASS_RDRAM1);
+        scheduler_context.to_stop.push_back(self);
+        scheduler_context.action_count.fetch_add(1);
+        scheduler_context.action_count.notify_all();
+    }
+    Multilibultra::wait_for_resumed(PASS_RDRAM1);
+}
+
+void stop_thread(OSThread *t) {
+    debug_printf("[Scheduler] Queuing Thread %d to be stopped\n", t->id);
+    {
+        std::lock_guard lock{scheduler_context.mutex};
+        scheduler_context.to_stop.push_back(t);
+        scheduler_context.action_count.fetch_add(1);
+        scheduler_context.action_count.notify_all();
+    }
+    Multilibultra::pause_thread_impl(t);
+}
+
+void cleanup_thread(OSThread *t) {
+    std::lock_guard lock{scheduler_context.mutex};
+    scheduler_context.to_cleanup.push_back(t);
+    scheduler_context.action_count.fetch_add(1);
+    scheduler_context.action_count.notify_all();
+}
+
+void disable_preemption() {
+    scheduler_context.premption_mutex.lock();
+    if (Multilibultra::is_game_thread()) {
+        scheduler_context.can_preempt = false;
+    }
+}
+
+void enable_preemption() {
+    if (Multilibultra::is_game_thread()) {
+        scheduler_context.can_preempt = true;
+    }
+#pragma warning(push)
+#pragma warning( disable : 26110)
+    scheduler_context.premption_mutex.unlock();
+#pragma warning( pop ) 
+}
+
+// lock's constructor is called first, so can_preempt is set after locking
+preemption_guard::preemption_guard() : lock{scheduler_context.premption_mutex} {
+    scheduler_context.can_preempt = false;
+}
+
+// lock's destructor is called last, so can_preempt is set before unlocking
+preemption_guard::~preemption_guard() {
+    scheduler_context.can_preempt = true;
+}
+
+void notify_scheduler() {
+    std::lock_guard lock{scheduler_context.mutex};
+    scheduler_context.notify_count.fetch_add(1);
+    scheduler_context.action_count.fetch_add(1);
+    scheduler_context.action_count.notify_all();
+}
+
+}
+
+extern "C" void pause_self(uint8_t* rdram) {
+    Multilibultra::pause_self(rdram);
+}
+

portultra/task_pthreads.cpp

@@ -0,0 +1,60 @@
+#ifndef _WIN32
+
+// #include <thread>
+// #include <stdexcept>
+// #include <atomic>
+
+#include <pthread.h>
+#include <signal.h>
+#include <limits.h>
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+
+constexpr int pause_thread_signum = SIGUSR1;
+
+// void cleanup_current_thread(OSThread *t) {
+//     debug_printf("Thread cleanup %d\n", t->id);
+
+//     // delete t->context;
+// }
+
+void sig_handler(int signum, siginfo_t *info, void *context) {
+    if (signum == pause_thread_signum) {
+        OSThread *t = Multilibultra::this_thread();
+
+        debug_printf("[Sig] Thread %d paused\n", t->id);
+
+        // Wait until the thread is marked as running again
+        t->context->running.wait(false);
+
+        debug_printf("[Sig] Thread %d resumed\n", t->id);
+    }
+}
+
+void Multilibultra::native_init(void) {
+    // Set up a signal handler to capture pause signals
+    struct sigaction sigact;
+    sigemptyset(&sigact.sa_mask);
+    sigact.sa_flags = SA_SIGINFO | SA_RESTART;
+    sigact.sa_sigaction = sig_handler;
+
+    sigaction(pause_thread_signum, &sigact, nullptr);
+}
+
+void Multilibultra::native_thread_init(OSThread *t) {
+    debug_printf("[Native] Init thread %d\n", t->id);
+}
+
+void Multilibultra::pause_thread_native_impl(OSThread *t) {
+    debug_printf("[Native] Pause thread %d\n", t->id);
+    // Send a pause signal to the thread, which will trigger it to wait on its pause barrier in the signal handler
+    pthread_kill(t->context->host_thread.native_handle(), pause_thread_signum);
+}
+
+void Multilibultra::resume_thread_native_impl(UNUSED OSThread *t) {
+    debug_printf("[Native] Resume thread %d\n", t->id);
+    // Nothing to do here
+}
+
+#endif

portultra/task_win32.cpp

@@ -0,0 +1,32 @@
+#include <Windows.h>
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+
+extern "C" unsigned int sleep(unsigned int seconds) {
+    Sleep(seconds * 1000);
+    return 0;
+}
+
+void Multilibultra::native_init(void) {
+}
+
+void Multilibultra::native_thread_init(OSThread *t) {
+    debug_printf("[Native] Init thread %d\n", t->id);
+}
+
+void Multilibultra::pause_thread_native_impl(OSThread *t) {
+    debug_printf("[Native] Pause thread %d\n", t->id);
+    // Pause the thread via the win32 API
+    SuspendThread(t->context->host_thread.native_handle());
+    // Perform a synchronous action to ensure that the thread is suspended
+    // see: https://devblogs.microsoft.com/oldnewthing/20150205-00/?p=44743
+    CONTEXT threadContext{};
+    GetThreadContext(t->context->host_thread.native_handle(), &threadContext);
+}
+
+void Multilibultra::resume_thread_native_impl(UNUSED OSThread *t) {
+    debug_printf("[Native] Resume thread %d\n", t->id);
+    // Resume the thread
+    ResumeThread(t->context->host_thread.native_handle());
+}

portultra/threads.cpp

@@ -0,0 +1,193 @@
+#include <cstdio>
+#include <thread>
+#include <cassert>
+#include <string>
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+
+// Native APIs only used to set thread names for easier debugging
+#ifdef _WIN32
+#include <Windows.h>
+#endif
+
+extern "C" void bootproc();
+
+thread_local bool is_main_thread = false;
+// Whether this thread is part of the game (i.e. the start thread or one spawned by osCreateThread)
+thread_local bool is_game_thread = false;
+thread_local PTR(OSThread) thread_self = NULLPTR;
+
+void Multilibultra::set_main_thread() {
+    ::is_game_thread = true;
+    is_main_thread = true;
+}
+
+bool Multilibultra::is_game_thread() {
+    return ::is_game_thread;
+}
+
+#if 0
+int main(int argc, char** argv) {
+    Multilibultra::set_main_thread();
+
+    bootproc();
+}
+#endif
+
+#if 1
+void run_thread_function(uint8_t* rdram, uint64_t addr, uint64_t sp, uint64_t arg);
+#else
+#define run_thread_function(func, sp, arg) func(arg)
+#endif
+
+static void _thread_func(RDRAM_ARG PTR(OSThread) self_, PTR(thread_func_t) entrypoint, PTR(void) arg) {
+    OSThread *self = TO_PTR(OSThread, self_);
+    debug_printf("[Thread] Thread created: %d\n", self->id);
+    thread_self = self_;
+    is_game_thread = true;
+
+    // Set the thread name
+#ifdef _WIN32
+    std::wstring thread_name = L"Game Thread " + std::to_wstring(self->id);
+    HRESULT r;
+    r = SetThreadDescription(
+        GetCurrentThread(),
+        thread_name.c_str()
+    );
+#endif
+
+    // Perform any necessary native thread initialization.
+    Multilibultra::native_thread_init(self);
+
+    // Set initialized to false to indicate that this thread can be started.
+    self->context->initialized.store(true);
+    self->context->initialized.notify_all();
+
+    debug_printf("[Thread] Thread waiting to be started: %d\n", self->id);
+
+    // Wait until the thread is marked as running.
+    Multilibultra::set_self_paused(PASS_RDRAM1);
+    Multilibultra::wait_for_resumed(PASS_RDRAM1);
+
+    debug_printf("[Thread] Thread started: %d\n", self->id);
+
+    // Run the thread's function with the provided argument.
+    run_thread_function(PASS_RDRAM entrypoint, self->sp, arg);
+
+    // Dispose of this thread after it completes.
+    Multilibultra::cleanup_thread(self);
+}
+
+extern "C" void osStartThread(RDRAM_ARG PTR(OSThread) t_) {
+    OSThread* t = TO_PTR(OSThread, t_);
+    debug_printf("[os] Start Thread %d\n", t->id);
+
+    // Wait until the thread is initialized to indicate that it's action_queued to be started.
+    t->context->initialized.wait(false);
+
+    debug_printf("[os] Thread %d is ready to be started\n", t->id);
+
+    if (thread_self && (t->priority > TO_PTR(OSThread, thread_self)->priority)) {
+        Multilibultra::swap_to_thread(PASS_RDRAM t);
+    } else {
+        Multilibultra::schedule_running_thread(t);
+    }
+
+    // The main thread "becomes" the first thread started, so join on it and exit after it completes.
+    if (is_main_thread) {
+        t->context->host_thread.join();
+        std::exit(EXIT_SUCCESS);
+    }
+}
+
+extern "C" void osCreateThread(RDRAM_ARG PTR(OSThread) t_, OSId id, PTR(thread_func_t) entrypoint, PTR(void) arg, PTR(void) sp, OSPri pri) {
+    debug_printf("[os] Create Thread %d\n", id);
+    OSThread *t = TO_PTR(OSThread, t_);
+    
+    t->next = NULLPTR;
+    t->priority = pri;
+    t->id = id;
+    t->state = OSThreadState::PAUSED;
+    t->sp = sp - 0x10; // Set up the first stack frame
+
+    // Spawn a new thread, which will immediately pause itself and wait until it's been started.
+    t->context = new UltraThreadContext{};
+    t->context->initialized.store(false);
+    t->context->running.store(false);
+
+    t->context->host_thread = std::thread{_thread_func, PASS_RDRAM t_, entrypoint, arg};
+}
+
+extern "C" void osStopThread(RDRAM_ARG PTR(OSThread) t_) {
+    assert(false);
+}
+
+extern "C" void osDestroyThread(RDRAM_ARG PTR(OSThread) t_) {
+    assert(false);
+}
+
+extern "C" void osSetThreadPri(RDRAM_ARG PTR(OSThread) t, OSPri pri) {
+    if (t == NULLPTR) {
+        t = thread_self;
+    }
+    bool pause_self = false;
+    if (pri > TO_PTR(OSThread, thread_self)->priority) {
+        pause_self = true;
+        Multilibultra::set_self_paused(PASS_RDRAM1);
+    } else if (t == thread_self && pri < TO_PTR(OSThread, thread_self)->priority) {
+        pause_self = true;
+        Multilibultra::set_self_paused(PASS_RDRAM1);
+    }
+    Multilibultra::reprioritize_thread(TO_PTR(OSThread, t), pri);
+    if (pause_self) {
+        Multilibultra::wait_for_resumed(PASS_RDRAM1);
+    }
+}
+
+extern "C" OSPri osGetThreadPri(RDRAM_ARG PTR(OSThread) t) {
+    if (t == NULLPTR) {
+        t = thread_self;
+    }
+    return TO_PTR(OSThread, t)->priority;
+}
+
+extern "C" OSId osGetThreadId(RDRAM_ARG PTR(OSThread) t) {
+    if (t == NULLPTR) {
+        t = thread_self;
+    }
+    return TO_PTR(OSThread, t)->id;
+}
+
+// TODO yield thread, need a stable priority queue in the scheduler
+
+void Multilibultra::set_self_paused(RDRAM_ARG1) {
+    debug_printf("[Thread] Thread pausing itself: %d\n", TO_PTR(OSThread, thread_self)->id);
+    TO_PTR(OSThread, thread_self)->state = OSThreadState::PAUSED;
+    TO_PTR(OSThread, thread_self)->context->running.store(false);
+    TO_PTR(OSThread, thread_self)->context->running.notify_all();
+}
+
+void Multilibultra::wait_for_resumed(RDRAM_ARG1) {
+    TO_PTR(OSThread, thread_self)->context->running.wait(false);
+}
+
+void Multilibultra::pause_thread_impl(OSThread* t) {
+    t->state = OSThreadState::PREEMPTED;
+    t->context->running.store(false);
+    t->context->running.notify_all();
+    Multilibultra::pause_thread_native_impl(t);
+}
+
+void Multilibultra::resume_thread_impl(OSThread *t) {
+    if (t->state == OSThreadState::PREEMPTED) {
+        Multilibultra::resume_thread_native_impl(t);
+    }
+    t->state = OSThreadState::RUNNING;
+    t->context->running.store(true);
+    t->context->running.notify_all();
+}
+
+PTR(OSThread) Multilibultra::this_thread() {
+    return thread_self;
+}

portultra/timer.cpp

@@ -0,0 +1,192 @@
+#include <thread>
+#include <variant>
+#include <set>
+#include "blockingconcurrentqueue.h"
+
+#include "ultra64.h"
+#include "multilibultra.hpp"
+#include "recomp.h"
+
+// Start time for the program
+static std::chrono::system_clock::time_point start = std::chrono::system_clock::now();
+// Game speed multiplier (1 means no speedup)
+constexpr uint32_t speed_multiplier = 1;
+// N64 CPU counter ticks per millisecond
+constexpr uint32_t counter_per_ms = 46'875 * speed_multiplier;
+
+struct OSTimer {
+    PTR(OSTimer) unused1;
+    PTR(OSTimer) unused2;
+    OSTime interval;
+    OSTime timestamp;
+    PTR(OSMesgQueue) mq;
+    OSMesg msg;
+};
+
+struct AddTimerAction {
+    PTR(OSTask) timer;
+};
+
+struct RemoveTimerAction {
+    PTR(OSTimer) timer;
+};
+
+using Action = std::variant<AddTimerAction, RemoveTimerAction>;
+
+struct {
+    std::thread thread;
+    moodycamel::BlockingConcurrentQueue<Action> action_queue{};
+} timer_context;
+
+uint64_t duration_to_ticks(std::chrono::system_clock::duration duration) {
+    uint64_t delta_micros = std::chrono::duration_cast<std::chrono::microseconds>(duration).count();
+    // More accurate than using a floating point timer, will only overflow after running for 12.47 years
+    // Units: (micros * (counts/millis)) / (micros/millis) = counts
+    uint64_t total_count = (delta_micros * counter_per_ms) / 1000;
+
+    return total_count;
+}
+
+std::chrono::microseconds ticks_to_duration(uint64_t ticks) {
+    using namespace std::chrono_literals;
+    return ticks * 1000us / counter_per_ms;
+}
+
+std::chrono::system_clock::time_point ticks_to_timepoint(uint64_t ticks) {
+    return start + ticks_to_duration(ticks);
+}
+
+uint64_t time_now() {
+    return duration_to_ticks(std::chrono::system_clock::now() - start);
+}
+
+void timer_thread(RDRAM_ARG1) {
+    // Lambda comparator function to keep the set ordered
+    auto timer_sort = [PASS_RDRAM1](PTR(OSTimer) a_, PTR(OSTimer) b_) {
+        OSTimer* a = TO_PTR(OSTimer, a_);
+        OSTimer* b = TO_PTR(OSTimer, b_);
+
+        // Order by timestamp if the timers have different timestamps
+        if (a->timestamp != b->timestamp) {
+            return a->timestamp < b->timestamp;
+        }
+
+        // If they have the exact same timestamp then order by address instead
+        return a < b;
+    };
+
+    // Ordered set of timers that are currently active
+    std::set<PTR(OSTimer), decltype(timer_sort)> active_timers{timer_sort};
+    
+    // Lambda to process a timer action to handle adding and removing timers
+    auto process_timer_action = [&](const Action& action) {
+        // Determine the action type and act on it
+        if (const auto* add_action = std::get_if<AddTimerAction>(&action)) {
+            active_timers.insert(add_action->timer);
+        } else if (const auto* remove_action = std::get_if<RemoveTimerAction>(&action)) {
+            active_timers.erase(remove_action->timer);
+        }
+    };
+
+    while (true) {
+        // Empty the action queue
+        Action cur_action;
+        while (timer_context.action_queue.try_dequeue(cur_action)) {
+            process_timer_action(cur_action);
+        }
+
+        // If there's no timer to act on, wait for one to come in from the action queue
+        while (active_timers.empty()) {
+            timer_context.action_queue.wait_dequeue(cur_action);
+            process_timer_action(cur_action);
+        }
+
+        // Get the timer that's closest to running out
+        PTR(OSTimer) cur_timer_ = *active_timers.begin();
+        OSTimer* cur_timer = TO_PTR(OSTimer, cur_timer_);
+
+        // Remove the timer from the queue (it may get readded if waiting is interrupted)
+        active_timers.erase(cur_timer_);
+
+        // Determine how long to wait to reach the timer's timestamp
+        auto wait_duration = ticks_to_timepoint(cur_timer->timestamp) - std::chrono::system_clock::now();
+        auto wait_us = std::chrono::duration_cast<std::chrono::microseconds>(wait_duration);
+
+        // Wait for either the duration to complete or a new action to come through
+        if (timer_context.action_queue.wait_dequeue_timed(cur_action, wait_duration)) {
+            // Timer was interrupted by a new action 
+            // Add the current timer back to the queue (done first in case the action is to remove this timer)
+            active_timers.insert(cur_timer_);
+            // Process the new action
+            process_timer_action(cur_action);
+        } else {
+            // Waiting for the timer completed, so send the timer's message to its message queue
+            osSendMesg(PASS_RDRAM cur_timer->mq, cur_timer->msg, OS_MESG_NOBLOCK);
+            // If the timer has a specified interval then reload it with that value
+            if (cur_timer->interval != 0) {
+                cur_timer->timestamp = cur_timer->interval + time_now();
+                active_timers.insert(cur_timer_);
+            }
+        }
+    }
+}
+
+void Multilibultra::init_timers(RDRAM_ARG1) {
+    timer_context.thread = std::thread{ timer_thread, PASS_RDRAM1 };
+}
+
+uint32_t Multilibultra::get_speed_multiplier() {
+    return speed_multiplier;
+}
+
+std::chrono::system_clock::time_point Multilibultra::get_start() {
+    return start;
+}
+
+std::chrono::system_clock::duration Multilibultra::time_since_start() {
+    return std::chrono::system_clock::now() - start;
+}
+
+extern "C" u32 osGetCount() {
+    uint64_t total_count = time_now();
+
+    // Allow for overflows, which is how osGetCount behaves
+    return (uint32_t)total_count;
+}
+
+extern "C" OSTime osGetTime() {
+    uint64_t total_count = time_now();
+
+    return total_count;
+}
+
+extern "C" int osSetTimer(RDRAM_ARG PTR(OSTimer) t_, OSTime countdown, OSTime interval, PTR(OSMesgQueue) mq, OSMesg msg) {
+    OSTimer* t = TO_PTR(OSTimer, t_);
+
+    // HACK: Skip the RCP timeout detection
+    if ((countdown == 140625000 || countdown == 1500000) && (uintptr_t)msg == 666) {
+        return 0;
+    }
+
+    // Determine the time when this timer will trigger off
+    if (countdown == 0) {
+        // Set the timestamp based on the interval
+        t->timestamp = interval + time_now();
+    } else {
+        t->timestamp = countdown + time_now();
+    }
+    t->interval = interval;
+    t->mq = mq;
+    t->msg = msg;
+
+    timer_context.action_queue.enqueue(AddTimerAction{ t_ });
+
+    return 0;
+}
+
+extern "C" int osStopTimer(RDRAM_ARG PTR(OSTimer) t_) {
+    timer_context.action_queue.enqueue(RemoveTimerAction{ t_ });
+
+    // TODO don't blindly return 0 here; requires some response from the timer thread to know what the returned value was
+    return 0;
+}

portultra/ultra64.h

@@ -0,0 +1,221 @@
+#ifndef __ULTRA64_MULTILIBULTRA_H__
+#define __ULTRA64_MULTILIBULTRA_H__
+
+#include <stdint.h>
+#include "platform_specific.h"
+
+#ifdef __cplusplus
+#include <queue>
+#endif
+
+#ifdef __GNUC__
+#define UNUSED __attribute__((unused))
+#define ALIGNED(x) __attribute__((aligned(x)))
+#else
+#define UNUSED
+#define ALIGNED(x)
+#endif
+
+typedef int64_t s64;
+typedef uint64_t u64;
+typedef int32_t s32;
+typedef uint32_t u32;
+typedef int16_t s16;
+typedef uint16_t u16;
+typedef int8_t s8;
+typedef uint8_t u8;
+
+#define PTR(x) int32_t
+#define RDRAM_ARG uint8_t *rdram, 
+#define RDRAM_ARG1 uint8_t *rdram
+#define PASS_RDRAM rdram, 
+#define PASS_RDRAM1 rdram
+#define TO_PTR(type, var) ((type*)(&rdram[(uint64_t)var - 0xFFFFFFFF80000000]))
+#ifdef __cplusplus
+#define NULLPTR (PTR(void))0
+#endif
+
+#ifndef NULL
+#define NULL (PTR(void) 0)
+#endif
+
+#define OS_MESG_NOBLOCK     0
+#define OS_MESG_BLOCK       1
+
+typedef s32 OSPri;
+typedef s32 OSId;
+
+typedef u64	OSTime;
+
+#define OS_EVENT_SW1              0     /* CPU SW1 interrupt */
+#define OS_EVENT_SW2              1     /* CPU SW2 interrupt */
+#define OS_EVENT_CART             2     /* Cartridge interrupt: used by rmon */
+#define OS_EVENT_COUNTER          3     /* Counter int: used by VI/Timer Mgr */
+#define OS_EVENT_SP               4     /* SP task done interrupt */
+#define OS_EVENT_SI               5     /* SI (controller) interrupt */
+#define OS_EVENT_AI               6     /* AI interrupt */
+#define OS_EVENT_VI               7     /* VI interrupt: used by VI/Timer Mgr */
+#define OS_EVENT_PI               8     /* PI interrupt: used by PI Manager */
+#define OS_EVENT_DP               9     /* DP full sync interrupt */
+#define OS_EVENT_CPU_BREAK        10    /* CPU breakpoint: used by rmon */
+#define OS_EVENT_SP_BREAK         11    /* SP breakpoint:  used by rmon */
+#define OS_EVENT_FAULT            12    /* CPU fault event: used by rmon */
+#define OS_EVENT_THREADSTATUS     13    /* CPU thread status: used by rmon */
+#define OS_EVENT_PRENMI           14    /* Pre NMI interrupt */
+
+#define	M_GFXTASK	1
+#define	M_AUDTASK	2
+#define	M_VIDTASK	3
+#define M_NJPEGTASK 4
+
+/////////////
+// Structs //
+/////////////
+
+// Threads
+
+typedef struct UltraThreadContext UltraThreadContext;
+
+typedef enum {
+    RUNNING,
+    PAUSED,
+    PREEMPTED
+} OSThreadState;
+
+typedef struct OSThread_t {
+    PTR(struct OSThread_t) next; // Next thread in the given queue
+    OSPri priority;
+    uint32_t pad1;
+    uint32_t pad2;
+    uint16_t flags; // These two are swapped to reflect rdram byteswapping
+    uint16_t state;
+    OSId id;
+    int32_t pad3;
+    UltraThreadContext* context; // An actual pointer regardless of platform
+    int32_t sp;
+} OSThread;
+
+typedef u32 OSEvent;
+typedef PTR(void) OSMesg;
+
+typedef struct OSMesgQueue {
+    PTR(OSThread) blocked_on_recv; /* Linked list of threads blocked on receiving from this queue */
+    PTR(OSThread) blocked_on_send; /* Linked list of threads blocked on sending to this queue */ 
+    s32 validCount;            /* Number of messages in the queue */
+    s32 first;                 /* Index of the first message in the ring buffer */
+    s32 msgCount;              /* Size of message buffer */
+    PTR(OSMesg) msg;               /* Pointer to circular buffer to store messages */
+} OSMesgQueue;
+
+// RSP
+
+typedef struct {
+    u32	type;
+    u32	flags;
+
+    PTR(u64) ucode_boot;
+    u32	ucode_boot_size;
+
+    PTR(u64) ucode;
+    u32	ucode_size;
+
+    PTR(u64) ucode_data;
+    u32	ucode_data_size;
+
+    PTR(u64) dram_stack;
+    u32	dram_stack_size;
+
+    PTR(u64) output_buff;
+    PTR(u64) output_buff_size;
+
+    PTR(u64) data_ptr;
+    u32	data_size;
+
+    PTR(u64) yield_data_ptr;
+    u32	yield_data_size;
+} OSTask_t;
+
+typedef union {
+    OSTask_t t;
+    int64_t force_structure_alignment;
+} OSTask;
+
+// PI
+
+struct OSIoMesgHdr {
+    // These 3 reversed due to endianness
+    u8 status;                 /* Return status */
+    u8 pri;                    /* Message priority (High or Normal) */
+    u16 type;                  /* Message type */
+    PTR(OSMesgQueue) retQueue; /* Return message queue to notify I/O completion */
+};
+
+struct OSIoMesg {
+    OSIoMesgHdr	hdr;    /* Message header */
+    PTR(void) dramAddr;	/* RDRAM buffer address (DMA) */
+    u32 devAddr;	    /* Device buffer address (DMA) */
+    u32 size;		    /* DMA transfer size in bytes */
+    u32 piHandle;	    /* PI device handle */
+};
+
+struct OSPiHandle {
+    PTR(OSPiHandle_s)    unused;        /* point to next handle on the table */
+    // These four members reversed due to endianness
+    u8                   relDuration;   /* domain release duration */
+    u8                   pageSize;      /* domain page size */
+    u8                   latency;       /* domain latency */
+    u8                   type;          /* DEVICE_TYPE_BULK for disk */
+    // These three members reversed due to endianness
+    u16                  padding;       /* struct alignment padding */
+    u8                   domain;        /* which domain */
+    u8                   pulse;         /* domain pulse width */
+    u32                  baseAddress;   /* Domain address */
+    u32                  speed;         /* for roms only */
+    /* The following are "private" elements" */
+    u32                  transferInfo[18];  /* for disk only */
+};
+
+///////////////
+// Functions //
+///////////////
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+void osInitialize(void);
+
+typedef void (thread_func_t)(PTR(void));
+
+void osCreateThread(RDRAM_ARG PTR(OSThread) t, OSId id, PTR(thread_func_t) entry, PTR(void) arg, PTR(void) sp, OSPri p);
+void osStartThread(RDRAM_ARG PTR(OSThread) t);
+void osStopThread(RDRAM_ARG PTR(OSThread) t);
+void osDestroyThread(RDRAM_ARG PTR(OSThread) t);
+void osSetThreadPri(RDRAM_ARG PTR(OSThread) t, OSPri pri);
+OSPri osGetThreadPri(RDRAM_ARG PTR(OSThread) thread);
+OSId osGetThreadId(RDRAM_ARG PTR(OSThread) t);
+
+s32 MQ_GET_COUNT(RDRAM_ARG PTR(OSMesgQueue));
+s32 MQ_IS_EMPTY(RDRAM_ARG PTR(OSMesgQueue));
+s32 MQ_IS_FULL(RDRAM_ARG PTR(OSMesgQueue));
+
+void osCreateMesgQueue(RDRAM_ARG PTR(OSMesgQueue), PTR(OSMesg), s32);
+s32 osSendMesg(RDRAM_ARG PTR(OSMesgQueue), OSMesg, s32);
+s32 osJamMesg(RDRAM_ARG PTR(OSMesgQueue), OSMesg, s32);
+s32 osRecvMesg(RDRAM_ARG PTR(OSMesgQueue), PTR(OSMesg), s32);
+void osSetEventMesg(RDRAM_ARG OSEvent, PTR(OSMesgQueue), OSMesg);
+void osViSetEvent(RDRAM_ARG PTR(OSMesgQueue), OSMesg, u32);
+void osViSwapBuffer(RDRAM_ARG PTR(void) frameBufPtr);
+PTR(void) osViGetNextFramebuffer();
+PTR(void) osViGetCurrentFramebuffer();
+u32 osGetCount();
+OSTime osGetTime();
+int osSetTimer(RDRAM_ARG PTR(OSTimer) timer, OSTime countdown, OSTime interval, PTR(OSMesgQueue) mq, OSMesg msg);
+int osStopTimer(RDRAM_ARG PTR(OSTimer) timer);
+u32 osVirtualToPhysical(PTR(void) addr);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif

portultra/ultrainit.cpp

@@ -0,0 +1,15 @@
+#include "ultra64.h"
+#include "multilibultra.hpp"
+
+void Multilibultra::preinit(uint8_t* rdram, uint8_t* rom) {
+    Multilibultra::set_main_thread();
+    Multilibultra::init_events(rdram, rom);
+    Multilibultra::init_timers(rdram);
+    Multilibultra::init_audio();
+    Multilibultra::save_init();
+}
+
+extern "C" void osInitialize() {
+    Multilibultra::init_scheduler();
+    Multilibultra::native_init();
+}

rsp/.gitignore

@@ -0,0 +1,2 @@
+aspMain.cpp
+njpgdspMain.cpp

src/ai.cpp

@@ -0,0 +1,29 @@
+#include "recomp.h"
+#include <cstdio>
+#include <string>
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+
+#define VI_NTSC_CLOCK 48681812
+
+extern "C" void osAiSetFrequency_recomp(uint8_t* rdram, recomp_context* ctx) {
+    uint32_t freq = ctx->r4;
+    // This makes actual audio frequency more accurate to console, but may not be desirable
+    //uint32_t dacRate = (uint32_t)(((float)VI_NTSC_CLOCK / freq) + 0.5f);
+    //freq = VI_NTSC_CLOCK / dacRate;
+    ctx->r2 = freq;
+    Multilibultra::set_audio_frequency(freq);
+}
+
+extern "C" void osAiSetNextBuffer_recomp(uint8_t* rdram, recomp_context* ctx) {
+    Multilibultra::queue_audio_buffer(rdram, ctx->r4, ctx->r5);
+    ctx->r2 = 0;
+}
+
+extern "C" void osAiGetLength_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = Multilibultra::get_remaining_audio_bytes();
+}
+
+extern "C" void osAiGetStatus_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = 0x00000000; // Pretend the audio DMAs finish instantly
+}

src/cont.cpp

@@ -0,0 +1,108 @@
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+static int max_controllers = 0;
+
+extern "C" void osContInit_recomp(uint8_t* rdram, recomp_context* ctx) {
+    gpr bitpattern = ctx->r5;
+    gpr status = ctx->r6;
+
+    // Set bit 0 to indicate that controller 0 is present
+    MEM_B(0, bitpattern) = 0x01;
+
+    // Mark controller 0 as present
+    MEM_H(0, status) = 0x0005; // type: CONT_TYPE_NORMAL (from joybus)
+    MEM_B(2, status) = 0x00; // status: 0 (from joybus)
+    MEM_B(3, status) = 0x00; // errno: 0 (from libultra)
+
+    max_controllers = 4;
+
+    // Mark controllers 1-3 as not connected
+    for (size_t controller = 1; controller < max_controllers; controller++) {
+        // Libultra doesn't write status or type for absent controllers
+        MEM_B(4 * controller + 3, status) = 0x80 >> 4; // errno: CONT_NO_RESPONSE_ERROR >> 4
+    }
+
+    ctx->r2 = 0;
+}
+
+extern "C" void osContStartReadData_recomp(uint8_t* rdram, recomp_context* ctx) {
+    Multilibultra::send_si_message();
+}
+
+struct OSContPad {
+    u16 button;
+    s8 stick_x;		/* -80 <= stick_x <= 80 */
+    s8 stick_y;		/* -80 <= stick_y <= 80 */
+    u8 errno_;
+};
+
+int button = 0;
+int stick_x = 0;
+int stick_y = 0;
+
+void press_button(int button) {
+
+}
+
+void release_button(int button) {
+
+}
+
+extern "C" void osContGetReadData_recomp(uint8_t* rdram, recomp_context* ctx) {
+    int32_t pad = (int32_t)ctx->r4;
+
+    if (max_controllers > 0) {
+        // button
+        MEM_H(0, pad) = button;
+        // stick_x
+        MEM_B(2, pad) = stick_x;
+        // stick_y
+        MEM_B(3, pad) = stick_y;
+        // errno
+        MEM_B(4, pad) = 0;
+    }
+    for (int controller = 1; controller < max_controllers; controller++) {
+        MEM_B(6 * controller + 4, pad) = 0x80 >> 4; // errno: CONT_NO_RESPONSE_ERROR >> 4
+    }
+}
+
+extern "C" void osContStartQuery_recomp(uint8_t * rdram, recomp_context * ctx) {
+    Multilibultra::send_si_message();
+}
+
+extern "C" void osContGetQuery_recomp(uint8_t * rdram, recomp_context * ctx) {
+    gpr status = ctx->r4;
+
+    // Mark controller 0 as present
+    MEM_H(0, status) = 0x0005; // type: CONT_TYPE_NORMAL (from joybus)
+    MEM_B(2, status) = 0x00; // status: 0 (from joybus)
+    MEM_B(3, status) = 0x00; // errno: 0 (from libultra)
+
+    // Mark controllers 1-3 as not connected
+    for (size_t controller = 1; controller < max_controllers; controller++) {
+        // Libultra doesn't write status or type for absent controllers
+        MEM_B(4 * controller + 3, status) = 0x80 >> 4; // errno: CONT_NO_RESPONSE_ERROR >> 4
+    }
+}
+
+extern "C" void osContSetCh_recomp(uint8_t* rdram, recomp_context* ctx) {
+    max_controllers = std::min((unsigned int)ctx->r4, 4u);
+    ctx->r2 = 0;
+}
+
+extern "C" void __osMotorAccess_recomp(uint8_t* rdram, recomp_context* ctx) {
+
+}
+
+extern "C" void osMotorInit_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osMotorStart_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osMotorStop_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}

src/dp.cpp

@@ -0,0 +1,5 @@
+#include "recomp.h"
+
+extern "C" void osDpSetNextBuffer_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}

src/eep.cpp

@@ -0,0 +1,21 @@
+#include "recomp.h"
+
+extern "C" void osEepromProbe_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osEepromWrite_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osEepromLongWrite_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osEepromRead_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osEepromLongRead_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}

src/euc-jp.h

@@ -0,0 +1,11 @@
+#ifndef __EUC_JP_H__
+#define __EUC_JP_H__
+
+#include <string>
+#include <string_view>
+
+namespace Encoding {
+    std::string decode_eucjp(std::string_view src);
+}
+
+#endif

src/flash.cpp

@@ -0,0 +1,137 @@
+#include <array>
+#include <cassert>
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+constexpr uint32_t flash_size = 1024 * 1024 / 8; // 1Mbit
+constexpr uint32_t page_size = 128;
+constexpr uint32_t pages_per_sector = 128;
+constexpr uint32_t sector_size = page_size * pages_per_sector;
+constexpr uint32_t sector_count = flash_size / sector_size;
+
+void save_write_ptr(const void* in, uint32_t offset, uint32_t count);
+void save_write(uint8_t* rdram, gpr rdram_address, uint32_t offset, uint32_t count);
+void save_read(uint8_t* rdram, gpr rdram_address, uint32_t offset, uint32_t count);
+void save_clear(uint32_t start, uint32_t size);
+
+std::array<char, page_size> write_buffer;
+
+extern "C" void osFlashInit_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = Multilibultra::flash_handle;
+}
+
+extern "C" void osFlashReadStatus_recomp(uint8_t * rdram, recomp_context * ctx) {
+	PTR(u8) flash_status = ctx->r4;
+
+	MEM_B(0, flash_status) = 0;
+}
+
+extern "C" void osFlashReadId_recomp(uint8_t * rdram, recomp_context * ctx) {
+	PTR(u32) flash_type = ctx->r4;
+	PTR(u32) flash_maker = ctx->r5;
+
+	MEM_B(0, flash_type) = 0;
+	MEM_B(0, flash_maker) = 0;
+}
+
+extern "C" void osFlashClearStatus_recomp(uint8_t * rdram, recomp_context * ctx) {
+
+}
+
+extern "C" void osFlashAllErase_recomp(uint8_t * rdram, recomp_context * ctx) {
+	save_clear(0, Multilibultra::save_size);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashAllEraseThrough_recomp(uint8_t * rdram, recomp_context * ctx) {
+	save_clear(0, Multilibultra::save_size);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashSectorErase_recomp(uint8_t * rdram, recomp_context * ctx) {
+	uint32_t page_num = (uint32_t)ctx->r4;
+	uint32_t sector_num = page_num / sector_size;
+
+	// Prevent out of bounds erase
+	if (sector_num >= sector_size) {
+		ctx->r2 = -1;
+		return;
+	}
+
+	save_clear(sector_num * sector_size, sector_size);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashSectorEraseThrough_recomp(uint8_t * rdram, recomp_context * ctx) {
+	uint32_t page_num = (uint32_t)ctx->r4;
+	uint32_t sector_num = page_num / sector_size;
+
+	// Prevent out of bounds erase
+	if (sector_num >= sector_size) {
+		ctx->r2 = -1;
+		return;
+	}
+
+	save_clear(sector_num * sector_size, sector_size);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashCheckEraseEnd_recomp(uint8_t * rdram, recomp_context * ctx) {
+	// All erases are blocking in this implementation, so this should always return OK.
+	ctx->r2 = 0; // FLASH_STATUS_ERASE_OK
+}
+
+extern "C" void osFlashWriteBuffer_recomp(uint8_t * rdram, recomp_context * ctx) {
+	OSIoMesg* mb = TO_PTR(OSIoMesg, ctx->r4);
+	int32_t pri = ctx->r5;
+	PTR(void) dramAddr = ctx->r6;
+	PTR(OSMesgQueue) mq = ctx->r7;
+	
+	// Copy the input data into the write buffer
+	for (size_t i = 0; i < page_size; i++) {
+		write_buffer[i] = MEM_B(i, dramAddr);
+	}
+
+	// Send the message indicating write completion
+	osSendMesg(PASS_RDRAM mq, 0, OS_MESG_NOBLOCK);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashWriteArray_recomp(uint8_t * rdram, recomp_context * ctx) {
+	uint32_t page_num = ctx->r4;
+
+	// Copy the write buffer into the save file
+	save_write_ptr(write_buffer.data(), page_num * page_size, page_size);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashReadArray_recomp(uint8_t * rdram, recomp_context * ctx) {
+	OSIoMesg* mb = TO_PTR(OSIoMesg, ctx->r4);
+	int32_t pri = ctx->r5;
+	uint32_t page_num = ctx->r6;
+	PTR(void) dramAddr = ctx->r7;
+	uint32_t n_pages = MEM_W(0x10, ctx->r29);
+	PTR(OSMesgQueue) mq = MEM_W(0x14, ctx->r29);
+
+	uint32_t offset = page_num * page_size;
+	uint32_t count = n_pages * page_size;
+
+	// Read from the save file into the provided buffer
+	save_read(PASS_RDRAM dramAddr, offset, count);
+
+	// Send the message indicating read completion
+	osSendMesg(PASS_RDRAM mq, 0, OS_MESG_NOBLOCK);
+
+	ctx->r2 = 0;
+}
+
+extern "C" void osFlashChange_recomp(uint8_t * rdram, recomp_context * ctx) {
+	assert(false);
+}

src/math_routines.cpp

@@ -0,0 +1,80 @@
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+
+extern "C" void __udivdi3_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    uint64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    uint64_t ret = a / b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __divdi3_recomp(uint8_t * rdram, recomp_context * ctx) {
+    int64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    int64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    int64_t ret = a / b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __umoddi3_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    uint64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    uint64_t ret = a % b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __ull_div_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    uint64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    uint64_t ret = a / b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __ll_div_recomp(uint8_t * rdram, recomp_context * ctx) {
+    int64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    int64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    int64_t ret = a / b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __ll_mul_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    uint64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    uint64_t ret = a * b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __ull_rem_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    uint64_t b = (ctx->r6 << 32) | ((ctx->r7 << 0) & 0xFFFFFFFFu);
+    uint64_t ret = a % b;
+
+    ctx->r2 = (int32_t)(ret >> 32);
+    ctx->r3 = (int32_t)(ret >> 0);
+}
+
+extern "C" void __ull_to_d_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    double ret = (double)a;
+
+    ctx->f0.d = ret;
+}
+
+extern "C" void __ull_to_f_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t a = (ctx->r4 << 32) | ((ctx->r5 << 0) & 0xFFFFFFFFu);
+    float ret = (float)a;
+
+    ctx->f0.fl = ret;
+}

src/overlays.cpp

@@ -0,0 +1,110 @@
+#include <unordered_map>
+#include <algorithm>
+#include <vector>
+#include "recomp.h"
+#include "../RecompiledFuncs/recomp_overlays.inl"
+
+constexpr size_t num_code_sections = ARRLEN(section_table);
+
+// SectionTableEntry sections[] defined in recomp_overlays.inl
+
+struct LoadedSection {
+    int32_t loaded_ram_addr;
+    size_t section_table_index;
+
+    bool operator<(const LoadedSection& rhs) {
+        return loaded_ram_addr < rhs.loaded_ram_addr;
+    }
+};
+
+std::vector<LoadedSection> loaded_sections{};
+std::unordered_map<int32_t, recomp_func_t*> func_map{};
+
+void load_overlay(size_t section_table_index, int32_t ram) {
+    const SectionTableEntry& section = section_table[section_table_index];
+    for (size_t function_index = 0; function_index < section.num_funcs; function_index++) {
+        const FuncEntry& func = section.funcs[function_index];
+        func_map[ram + func.offset] = func.func;
+    }
+    loaded_sections.emplace_back(ram, section_table_index);
+    section_addresses[section.index] = ram;
+}
+
+
+extern "C" {
+int32_t section_addresses[num_sections];
+}
+
+extern "C" void load_overlays(uint32_t rom, int32_t ram_addr, uint32_t size) {
+    // Search for the first section that's included in the loaded rom range
+    // Sections were sorted by `init_overlays` so we can use the bounds functions
+    auto lower = std::lower_bound(&section_table[0], &section_table[num_code_sections], rom,
+        [](const SectionTableEntry& entry, uint32_t addr) {
+            return entry.rom_addr < addr;
+        }
+    );
+    auto upper = std::upper_bound(&section_table[0], &section_table[num_code_sections], (uint32_t)(rom + size),
+        [](uint32_t addr, const SectionTableEntry& entry) {
+            return addr < entry.size + entry.rom_addr;
+        }
+    );
+    // Load the overlays that were found
+    for (auto it = lower; it != upper; ++it) {
+        load_overlay(std::distance(&section_table[0], it), it->rom_addr - rom + ram_addr);
+    }
+}
+
+extern "C" void unload_overlays(int32_t ram_addr, uint32_t size) {
+    for (auto it = loaded_sections.begin(); it != loaded_sections.end();) {
+        const auto& section = section_table[it->section_table_index];
+
+        // Check if the unloaded region overlaps with the loaded section
+        if (ram_addr < (it->loaded_ram_addr + section.size) && (ram_addr + size) >= it->loaded_ram_addr) {
+            // Check if the section isn't entirely in the loaded region
+            if (ram_addr > it->loaded_ram_addr || (ram_addr + size) < (it->loaded_ram_addr + section.size)) {
+                fprintf(stderr,
+                    "Cannot partially unload section\n"
+                    "  rom: 0x%08X size: 0x%08X loaded_addr: 0x%08X\n"
+                    "  unloaded_ram: 0x%08X unloaded_size : 0x%08X\n",
+                        section.rom_addr, section.size, it->loaded_ram_addr, ram_addr, size);
+                std::exit(EXIT_FAILURE);
+            }
+            // Determine where each function was loaded to and remove that entry from the function map
+            for (size_t func_index = 0; func_index < section.num_funcs; func_index++) {
+                const auto& func = section.funcs[func_index];
+                uint32_t func_address = func.offset + it->loaded_ram_addr;
+                func_map.erase(func_address);
+            }
+            // Reset the section's address in the address table
+            section_addresses[section.index] = 0;
+            // Remove the section from the loaded section map
+            it = loaded_sections.erase(it);
+            // Skip incrementing the iterator
+            continue;
+        }
+        ++it;
+    }
+}
+
+void init_overlays() {
+    for (size_t section_index = 0; section_index < num_code_sections; section_index++) {
+        section_addresses[section_table[section_index].index] = section_table[section_index].ram_addr;
+    }
+
+    // Sort the executable sections by rom address
+    std::sort(&section_table[0], &section_table[num_code_sections],
+        [](const SectionTableEntry& a, const SectionTableEntry& b) {
+            return a.rom_addr < b.rom_addr;
+        }
+    );
+}
+
+extern "C" recomp_func_t * get_function(int32_t addr) {
+    auto func_find = func_map.find(addr);
+    if (func_find == func_map.end()) {
+        fprintf(stderr, "Failed to find function at 0x%08X\n", addr);
+        std::exit(EXIT_FAILURE);
+    }
+    return func_find->second;
+}
+

src/pak.cpp

@@ -0,0 +1,31 @@
+#include "recomp.h"
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+
+extern "C" void osPfsInitPak_recomp(uint8_t * rdram, recomp_context* ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsFreeBlocks_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsAllocateFile_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsDeleteFile_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsFileState_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsFindFile_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}
+
+extern "C" void osPfsReadWriteFile_recomp(uint8_t * rdram, recomp_context * ctx) {
+	ctx->r2 = 1; // PFS_ERR_NOPACK
+}

src/pi.cpp

@@ -0,0 +1,193 @@
+#include <memory>
+#include <fstream>
+#include <array>
+#include "recomp.h"
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+
+// Flashram occupies the same physical address as sram, but that issue is avoided because libultra exposes
+// a high-level interface for flashram. Because that high-level interface is reimplemented, low level accesses
+// that involve physical addresses don't need to be handled for flashram.
+constexpr uint32_t sram_base = 0x08000000;
+constexpr uint32_t rom_base = 0x10000000;
+
+constexpr uint32_t k1_to_phys(uint32_t addr) {
+    return addr & 0x1FFFFFFF;
+}
+
+constexpr uint32_t phys_to_k1(uint32_t addr) {
+    return addr | 0xA0000000;
+}
+
+extern std::unique_ptr<uint8_t[]> rom;
+extern size_t rom_size;
+
+extern "C" void osCartRomInit_recomp(uint8_t* rdram, recomp_context* ctx) {
+    OSPiHandle* handle = TO_PTR(OSPiHandle, Multilibultra::cart_handle);
+    handle->type = 0; // cart
+    handle->baseAddress = phys_to_k1(rom_base);
+    handle->domain = 0;
+
+    ctx->r2 = (gpr)Multilibultra::cart_handle;
+}
+
+extern "C" void osCreatePiManager_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+void do_rom_read(uint8_t* rdram, gpr ram_address, uint32_t physical_addr, size_t num_bytes) {
+    // TODO use word copies when possible
+    uint8_t* rom_addr = rom.get() + physical_addr - rom_base;
+    for (size_t i = 0; i < num_bytes; i++) {
+        MEM_B(i, ram_address) = *rom_addr;
+        rom_addr++;
+    }
+}
+
+std::array<char, 0x20000> save_buffer;
+const char save_filename[] = "save.bin";
+
+void update_save_file() {
+    std::ofstream save_file{ save_filename, std::ios_base::binary };
+
+    if (save_file.good()) {
+        save_file.write(save_buffer.data(), save_buffer.size());
+    } else {
+        fprintf(stderr, "Failed to save!\n");
+        std::exit(EXIT_FAILURE);
+    }
+}
+
+void save_write_ptr(const void* in, uint32_t offset, uint32_t count) {
+    memcpy(&save_buffer[offset], in, count);
+    update_save_file();
+}
+
+void save_write(uint8_t* rdram, gpr rdram_address, uint32_t offset, uint32_t count) {
+    for (uint32_t i = 0; i < count; i++) {
+        save_buffer[offset + i] = MEM_B(i, rdram_address);
+    }
+    update_save_file();
+}
+
+void save_read(uint8_t* rdram, gpr rdram_address, uint32_t offset, uint32_t count) {
+    for (size_t i = 0; i < count; i++) {
+        MEM_B(i, rdram_address) = save_buffer[offset + i];
+    }
+}
+
+void save_clear(uint32_t start, uint32_t size) {
+    std::fill_n(save_buffer.begin() + start, size, 0);
+    std::ofstream save_file{ save_filename, std::ios_base::binary };
+
+    if (save_file.good()) {
+        save_file.write(save_buffer.data(), save_buffer.size());
+    } else {
+        fprintf(stderr, "Failed to save!\n");
+        std::exit(EXIT_FAILURE);
+    }
+}
+
+void Multilibultra::save_init() {
+    std::ifstream save_file{ save_filename, std::ios_base::binary };
+
+    if (save_file.good()) {
+        save_file.read(save_buffer.data(), save_buffer.size());
+    } else {
+        save_buffer.fill(0);
+    }
+}
+
+void do_dma(uint8_t* rdram, PTR(OSMesgQueue) mq, gpr rdram_address, uint32_t physical_addr, uint32_t size, uint32_t direction) {
+    // TODO asynchronous transfer
+    // TODO implement unaligned DMA correctly
+    if (direction == 0) {
+        if (physical_addr >= rom_base) {
+            // read cart rom
+            do_rom_read(rdram, rdram_address, physical_addr, size);
+
+            // Send a message to the mq to indicate that the transfer completed
+            osSendMesg(rdram, mq, 0, OS_MESG_NOBLOCK);
+        } else if (physical_addr >= sram_base) {
+            // read sram
+            save_read(rdram, rdram_address, physical_addr - sram_base, size);
+
+            // Send a message to the mq to indicate that the transfer completed
+            osSendMesg(rdram, mq, 0, OS_MESG_NOBLOCK);
+        } else {
+            fprintf(stderr, "[WARN] PI DMA read from unknown region, phys address 0x%08X\n", physical_addr);
+        }
+    } else {
+        if (physical_addr >= rom_base) {
+            // write cart rom
+            throw std::runtime_error("ROM DMA write unimplemented");
+        } else if (physical_addr >= sram_base) {
+            // write sram
+            save_write(rdram, rdram_address, physical_addr - sram_base, size);
+
+            // Send a message to the mq to indicate that the transfer completed
+            osSendMesg(rdram, mq, 0, OS_MESG_NOBLOCK);
+        } else {
+            fprintf(stderr, "[WARN] PI DMA write to unknown region, phys address 0x%08X\n", physical_addr);
+        }
+    }
+}
+
+extern "C" void osPiStartDma_recomp(uint8_t* rdram, recomp_context* ctx) {
+    uint32_t mb = ctx->r4;
+    uint32_t pri = ctx->r5;
+    uint32_t direction = ctx->r6;
+    uint32_t devAddr = ctx->r7;
+    gpr dramAddr = MEM_W(0x10, ctx->r29);
+    uint32_t size = MEM_W(0x14, ctx->r29);
+    PTR(OSMesgQueue) mq = MEM_W(0x18, ctx->r29);
+    uint32_t physical_addr = k1_to_phys(devAddr);
+
+    debug_printf("[pi] DMA from 0x%08X into 0x%08X of size 0x%08X\n", devAddr, dramAddr, size);
+
+    do_dma(rdram, mq, dramAddr, physical_addr, size, direction);
+
+    ctx->r2 = 0;
+}
+
+extern "C" void osEPiStartDma_recomp(uint8_t* rdram, recomp_context* ctx) {
+    OSPiHandle* handle = TO_PTR(OSPiHandle, ctx->r4);
+    OSIoMesg* mb = TO_PTR(OSIoMesg, ctx->r5);
+    uint32_t direction = ctx->r6;
+    uint32_t devAddr = handle->baseAddress | mb->devAddr;
+    gpr dramAddr = mb->dramAddr;
+    uint32_t size = mb->size;
+    PTR(OSMesgQueue) mq = mb->hdr.retQueue;
+    uint32_t physical_addr = k1_to_phys(devAddr);
+
+    debug_printf("[pi] DMA from 0x%08X into 0x%08X of size 0x%08X\n", devAddr, dramAddr, size);
+
+    do_dma(rdram, mq, dramAddr, physical_addr, size, direction);
+
+    ctx->r2 = 0;
+}
+
+extern "C" void osEPiReadIo_recomp(uint8_t * rdram, recomp_context * ctx) {
+    OSPiHandle* handle = TO_PTR(OSPiHandle, ctx->r4);
+    uint32_t devAddr = handle->baseAddress | ctx->r5;
+    gpr dramAddr = ctx->r6;
+    uint32_t physical_addr = k1_to_phys(devAddr);
+
+    if (physical_addr > rom_base) {
+        // cart rom
+        do_rom_read(rdram, dramAddr, physical_addr, sizeof(uint32_t));
+    } else {
+        // sram
+        assert(false && "SRAM ReadIo unimplemented");
+    }
+
+    ctx->r2 = 0;
+}
+
+extern "C" void osPiGetStatus_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}
+
+extern "C" void osPiRawStartDma_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}

src/portultra_stubs.cpp

@@ -0,0 +1,45 @@
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+// None of these functions need to be reimplemented, so stub them out
+extern "C" void osUnmapTLBAll_recomp(uint8_t * rdram, recomp_context * ctx) {
+    // TODO this will need to be implemented in the future for any games that actually use the TLB
+}
+
+extern "C" void osVoiceInit_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 11; // CONT_ERR_DEVICE
+}
+
+extern "C" void osVoiceSetWord_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceCheckWord_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceStopReadData_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceMaskDictionary_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceStartReadData_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceControlGain_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceGetReadData_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+
+extern "C" void osVoiceClearDictionary_recomp(uint8_t * rdram, recomp_context * ctx) {
+    assert(false);
+}
+

src/portultra_translation.cpp

@@ -0,0 +1,158 @@
+#include <memory>
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+extern "C" void osInitialize_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osInitialize();
+}
+
+extern "C" void __osInitialize_common_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osInitialize();
+}
+
+extern "C" void osCreateThread_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osCreateThread(rdram, (int32_t)ctx->r4, (OSId)ctx->r5, (int32_t)ctx->r6, (int32_t)ctx->r7,
+        (int32_t)MEM_W(0x10, ctx->r29), (OSPri)MEM_W(0x14, ctx->r29));
+}
+
+extern "C" void osStartThread_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osStartThread(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osStopThread_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osStopThread(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osDestroyThread_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osDestroyThread(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osSetThreadPri_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osSetThreadPri(rdram, (int32_t)ctx->r4, (OSPri)ctx->r5);
+}
+
+extern "C" void osGetThreadPri_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = osGetThreadPri(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osGetThreadId_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = osGetThreadId(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osCreateMesgQueue_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osCreateMesgQueue(rdram, (int32_t)ctx->r4, (int32_t)ctx->r5, (s32)ctx->r6);
+}
+
+extern "C" void osRecvMesg_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = osRecvMesg(rdram, (int32_t)ctx->r4, (int32_t)ctx->r5, (s32)ctx->r6);
+}
+
+extern "C" void osSendMesg_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = osSendMesg(rdram, (int32_t)ctx->r4, (OSMesg)ctx->r5, (s32)ctx->r6);
+}
+
+extern "C" void osJamMesg_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = osJamMesg(rdram, (int32_t)ctx->r4, (OSMesg)ctx->r5, (s32)ctx->r6);
+}
+
+extern "C" void osSetEventMesg_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osSetEventMesg(rdram, (OSEvent)ctx->r4, (int32_t)ctx->r5, (OSMesg)ctx->r6);
+}
+
+extern "C" void osViSetEvent_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osViSetEvent(rdram, (int32_t)ctx->r4, (OSMesg)ctx->r5, (u32)ctx->r6);
+}
+
+extern "C" void osGetCount_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = osGetCount();
+}
+
+extern "C" void osGetTime_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t total_count = osGetTime();
+    ctx->r2 = (int32_t)(total_count >> 32);
+    ctx->r3 = (int32_t)(total_count >> 0);
+}
+
+extern "C" void osSetTimer_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t countdown = ((uint64_t)(ctx->r6) << 32) | ((ctx->r7) & 0xFFFFFFFFu);
+    uint64_t interval = load_doubleword(rdram, ctx->r29, 0x10);
+    ctx->r2 = osSetTimer(rdram, (int32_t)ctx->r4, countdown, interval, (int32_t)MEM_W(0x18, ctx->r29), (OSMesg)MEM_W(0x1C, ctx->r29));
+}
+
+extern "C" void osStopTimer_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = osStopTimer(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osVirtualToPhysical_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = osVirtualToPhysical((int32_t)ctx->r2);
+}
+
+extern "C" void osInvalDCache_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osInvalICache_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osWritebackDCache_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osWritebackDCacheAll_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osSetIntMask_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void __osDisableInt_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void __osRestoreInt_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void __osSetFpcCsr_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}
+
+// For the Mario Party games (not working)
+//extern "C" void longjmp_recomp(uint8_t * rdram, recomp_context * ctx) {
+//    RecompJmpBuf* buf = TO_PTR(RecompJmpBuf, ctx->r4);
+//
+//    // Check if this is a buffer that was set up with setjmp
+//    if (buf->magic == SETJMP_MAGIC) {
+//        // If so, longjmp to it
+//        // Setjmp/longjmp does not work across threads, so verify that this buffer was made by this thread
+//        assert(buf->owner == Multilibultra::this_thread());
+//        longjmp(buf->storage->buffer, ctx->r5);
+//    } else {
+//        // Otherwise, check if it was one built manually by the game with $ra pointing to a function
+//        gpr sp = MEM_W(0, ctx->r4);
+//        gpr ra = MEM_W(4, ctx->r4);
+//        ctx->r29 = sp;
+//        recomp_func_t* target = LOOKUP_FUNC(ra);
+//        if (target == nullptr) {
+//            fprintf(stderr, "Failed to find function for manual longjmp\n");
+//            std::quick_exit(EXIT_FAILURE);
+//        }
+//        target(rdram, ctx);
+//
+//        // TODO kill this thread if the target function returns
+//        assert(false);
+//    }
+//}
+//
+//#undef setjmp_recomp
+//extern "C" void setjmp_recomp(uint8_t * rdram, recomp_context * ctx) {
+//    fprintf(stderr, "Program called setjmp_recomp\n");
+//    std::quick_exit(EXIT_FAILURE);
+//}
+//
+//extern "C" int32_t osGetThreadEx(void) {
+//    return Multilibultra::this_thread();
+//}

src/print.cpp

@@ -0,0 +1,70 @@
+#include "../portultra/ultra64.h"
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+#include "euc-jp.h"
+
+extern "C" void __checkHardware_msp_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}
+
+extern "C" void __checkHardware_kmc_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}
+
+extern "C" void __checkHardware_isv_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 0;
+}
+
+extern "C" void __osInitialize_msp_recomp(uint8_t * rdram, recomp_context * ctx) {
+}
+
+extern "C" void __osInitialize_kmc_recomp(uint8_t * rdram, recomp_context * ctx) {
+}
+
+extern "C" void __osInitialize_isv_recomp(uint8_t * rdram, recomp_context * ctx) {
+}
+
+extern "C" void isPrintfInit_recomp(uint8_t * rdram, recomp_context * ctx) {
+}
+
+extern "C" void __osRdbSend_recomp(uint8_t * rdram, recomp_context * ctx) {
+    gpr buf = ctx->r4;
+    size_t size = ctx->r5;
+    u32 type = (u32)ctx->r6;
+    std::unique_ptr<char[]> to_print = std::make_unique<char[]>(size + 1);
+
+    for (size_t i = 0; i < size; i++) {
+        to_print[i] = MEM_B(i, buf);
+    }
+    to_print[size] = '\x00';
+
+    fwrite(to_print.get(), 1, size, stdout);
+
+    ctx->r2 = size;
+}
+
+extern "C" void is_proutSyncPrintf_recomp(uint8_t * rdram, recomp_context * ctx) {
+    // Buffering to speed up print performance
+    static std::vector<char> print_buffer;
+
+    gpr buf = ctx->r5;
+    size_t size = ctx->r6;
+
+    //for (size_t i = 0; i < size; i++) {
+    //    // Add the new character to the buffer
+    //    char cur_char = MEM_B(i, buf);
+
+    //    // If the new character is a newline, flush the buffer
+    //    if (cur_char == '\n') {
+    //        std::string utf8_str = Encoding::decode_eucjp(std::string_view{ print_buffer.data(), print_buffer.size() });
+    //        puts(utf8_str.c_str());
+    //        print_buffer.clear();
+    //    } else {
+    //        print_buffer.push_back(cur_char);
+    //    }
+    //}
+
+    //fwrite(to_print.get(), size, 1, stdout);
+
+    ctx->r2 = 1;
+}

src/recomp.cpp

@@ -0,0 +1,165 @@
+#ifdef _WIN32
+#include <Windows.h>
+#endif
+#include <cstdio>
+#include <cstdlib>
+#include <memory>
+#include <cmath>
+#include <unordered_map>
+#include <fstream>
+#include <iostream>
+#include "recomp.h"
+#include "../portultra/multilibultra.hpp"
+
+#ifdef _MSC_VER
+inline uint32_t byteswap(uint32_t val) {
+    return _byteswap_ulong(val);
+}
+#else
+constexpr uint32_t byteswap(uint32_t val) {
+    return __builtin_bswap32(val);
+}
+#endif
+
+extern "C" void _bzero(uint8_t* rdram, recomp_context* ctx) {
+    gpr start_addr = ctx->r4;
+    gpr size = ctx->r5;
+
+    for (uint32_t i = 0; i < size; i++) {
+        MEM_B(start_addr, i) = 0;
+    }
+}
+
+extern "C" void osGetMemSize_recomp(uint8_t * rdram, recomp_context * ctx) {
+    ctx->r2 = 8 * 1024 * 1024;
+}
+
+extern "C" void switch_error(const char* func, uint32_t vram, uint32_t jtbl) {
+    printf("Switch-case out of bounds in %s at 0x%08X for jump table at 0x%08X\n", func, vram, jtbl);
+    exit(EXIT_FAILURE);
+}
+
+extern "C" void do_break(uint32_t vram) {
+    printf("Encountered break at original vram 0x%08X\n", vram);
+    exit(EXIT_FAILURE);
+}
+
+void run_thread_function(uint8_t* rdram, uint64_t addr, uint64_t sp, uint64_t arg) {
+    recomp_context ctx{};
+    ctx.r29 = sp;
+    ctx.r4 = arg;
+    recomp_func_t* func = get_function(addr);
+    func(rdram, &ctx);
+}
+
+void do_rom_read(uint8_t* rdram, gpr ram_address, uint32_t dev_address, size_t num_bytes);
+
+std::unique_ptr<uint8_t[]> rom;
+size_t rom_size;
+
+// Recomp generation functions
+extern "C" void recomp_entrypoint(uint8_t * rdram, recomp_context * ctx);
+gpr get_entrypoint_address();
+const char* get_rom_name();
+void init_overlays();
+extern "C" void load_overlays(uint32_t rom, int32_t ram_addr, uint32_t size);
+extern "C" void unload_overlays(int32_t ram_addr, uint32_t size);
+
+#ifdef _WIN32
+#include <Windows.h>
+#endif
+
+int main(int argc, char **argv) {
+    //if (argc != 2) {
+    //    printf("Usage: %s [baserom]\n", argv[0]);
+    //    exit(EXIT_SUCCESS);
+    //}
+
+#ifdef _WIN32
+    // Set up console output to accept UTF-8 on windows
+    SetConsoleOutputCP(CP_UTF8);
+
+    // Change to a font that supports Japanese characters
+    CONSOLE_FONT_INFOEX cfi;
+    cfi.cbSize = sizeof cfi;
+    cfi.nFont = 0;
+    cfi.dwFontSize.X = 0;
+    cfi.dwFontSize.Y = 16;
+    cfi.FontFamily = FF_DONTCARE;
+    cfi.FontWeight = FW_NORMAL;
+    wcscpy_s(cfi.FaceName, L"NSimSun");
+    SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &cfi);
+#else
+    std::setlocale(LC_ALL, "en_US.UTF-8");
+#endif
+
+    {
+        std::basic_ifstream<uint8_t> rom_file{ get_rom_name(), std::ios::binary };
+
+        size_t iobuf_size = 0x100000;
+        std::unique_ptr<uint8_t[]> iobuf = std::make_unique<uint8_t[]>(iobuf_size);
+        rom_file.rdbuf()->pubsetbuf(iobuf.get(), iobuf_size);
+
+        if (!rom_file) {
+            fprintf(stderr, "Failed to open rom: %s\n", get_rom_name());
+            exit(EXIT_FAILURE);
+        }
+
+        rom_file.seekg(0, std::ios::end);
+        rom_size = rom_file.tellg();
+        rom_file.seekg(0, std::ios::beg);
+
+        rom = std::make_unique<uint8_t[]>(rom_size);
+
+        rom_file.read(rom.get(), rom_size);
+
+        // TODO remove this
+        // Modify the name in the rom header so RT64 doesn't find it
+        rom[0x2F] = 'O';
+    }
+
+    // Initialize the overlays
+    init_overlays();
+
+    // Get entrypoint from recomp function
+    gpr entrypoint = get_entrypoint_address();
+
+    // Load overlays in the first 1MB
+    load_overlays(0x1000, (int32_t)entrypoint, 1024 * 1024);
+
+    // Allocate rdram_buffer (16MB to give room for any extra addressable data used by recomp)
+    std::unique_ptr<uint8_t[]> rdram_buffer = std::make_unique<uint8_t[]>(16 * 1024 * 1024);
+    std::memset(rdram_buffer.get(), 0, 8 * 1024 * 1024);
+    recomp_context context{};
+
+    // Initial 1MB DMA (rom address 0x1000 = physical address 0x10001000)
+    do_rom_read(rdram_buffer.get(), entrypoint, 0x10001000, 0x100000);
+
+    // Set up stack pointer
+    context.r29 = 0xFFFFFFFF803FFFF0u;
+
+    // Initialize variables normally set by IPL3
+    constexpr int32_t osTvType = 0x80000300;
+    constexpr int32_t osRomType = 0x80000304;
+    constexpr int32_t osRomBase = 0x80000308;
+    constexpr int32_t osResetType = 0x8000030c;
+    constexpr int32_t osCicId = 0x80000310;
+    constexpr int32_t osVersion = 0x80000314;
+    constexpr int32_t osMemSize = 0x80000318;
+    constexpr int32_t osAppNMIBuffer = 0x8000031c;
+    uint8_t *rdram = rdram_buffer.get();
+    MEM_W(osTvType, 0) = 1; // NTSC
+    MEM_W(osRomBase, 0) = 0xB0000000u; // standard rom base
+    MEM_W(osResetType, 0) = 0; // cold reset
+    MEM_W(osMemSize, 0) = 8 * 1024 * 1024; // 8MB
+
+    debug_printf("[Recomp] Starting\n");
+
+    Multilibultra::preinit(rdram_buffer.get(), rom.get());
+
+    recomp_entrypoint(rdram_buffer.get(), &context);
+
+    debug_printf("[Recomp] Quitting\n");
+
+    return EXIT_SUCCESS;
+}

src/rt64_layer.cpp

@@ -0,0 +1,114 @@
+#include <memory>
+#include <Windows.h>
+
+#include "../portultra/multilibultra.hpp"
+#include "rt64_layer.h"
+#include "SDL.h"
+
+static uint8_t DMEM[0x1000];
+static uint8_t IMEM[0x1000];
+
+unsigned int MI_INTR_REG = 0;
+
+unsigned int DPC_START_REG = 0;
+unsigned int DPC_END_REG = 0;
+unsigned int DPC_CURRENT_REG = 0;
+unsigned int DPC_STATUS_REG = 0;
+unsigned int DPC_CLOCK_REG = 0;
+unsigned int DPC_BUFBUSY_REG = 0;
+unsigned int DPC_PIPEBUSY_REG = 0;
+unsigned int DPC_TMEM_REG = 0;
+
+unsigned int VI_STATUS_REG = 0;
+unsigned int VI_ORIGIN_REG = 0;
+unsigned int VI_WIDTH_REG = 0;
+unsigned int VI_INTR_REG = 0;
+unsigned int VI_V_CURRENT_LINE_REG = 0;
+unsigned int VI_TIMING_REG = 0;
+unsigned int VI_V_SYNC_REG = 0;
+unsigned int VI_H_SYNC_REG = 0;
+unsigned int VI_LEAP_REG = 0;
+unsigned int VI_H_START_REG = 0;
+unsigned int VI_V_START_REG = 0;
+unsigned int VI_V_BURST_REG = 0;
+unsigned int VI_X_SCALE_REG = 0;
+unsigned int VI_Y_SCALE_REG = 0;
+
+unsigned int SP_STATUS_REG = 0;
+unsigned int RDRAM_SIZE = 0x800000;
+
+#define GET_FUNC(lib, name) \
+    name = (decltype(name))GetProcAddress(lib, #name)
+
+void dummy_check_interrupts() {
+
+}
+
+void RT64Init(uint8_t* rom, uint8_t* rdram) {
+    // Dynamic loading
+    //auto RT64 = LoadLibrary("RT64.dll");
+    //if (RT64 == 0) {
+    //    fprintf(stdout, "Failed to load RT64\n");
+    //    std::exit(EXIT_FAILURE);
+    //}
+    //GET_FUNC(RT64, InitiateGFX);
+    //GET_FUNC(RT64, ProcessRDPList);
+    //GET_FUNC(RT64, ProcessDList);
+    //GET_FUNC(RT64, UpdateScreen);
+
+    GFX_INFO gfx_info{};
+    gfx_info.HEADER = rom;
+    gfx_info.RDRAM = rdram;
+    gfx_info.DMEM = DMEM;
+    gfx_info.IMEM = IMEM;
+
+    gfx_info.MI_INTR_REG = &MI_INTR_REG;
+
+    gfx_info.DPC_START_REG = &DPC_START_REG;
+    gfx_info.DPC_END_REG = &DPC_END_REG;
+    gfx_info.DPC_CURRENT_REG = &DPC_CURRENT_REG;
+    gfx_info.DPC_STATUS_REG = &DPC_STATUS_REG;
+    gfx_info.DPC_CLOCK_REG = &DPC_CLOCK_REG;
+    gfx_info.DPC_BUFBUSY_REG = &DPC_BUFBUSY_REG;
+    gfx_info.DPC_PIPEBUSY_REG = &DPC_PIPEBUSY_REG;
+    gfx_info.DPC_TMEM_REG = &DPC_TMEM_REG;
+
+    gfx_info.VI_STATUS_REG = &VI_STATUS_REG;
+    gfx_info.VI_ORIGIN_REG = &VI_ORIGIN_REG;
+    gfx_info.VI_WIDTH_REG = &VI_WIDTH_REG;
+    gfx_info.VI_INTR_REG = &VI_INTR_REG;
+    gfx_info.VI_V_CURRENT_LINE_REG = &VI_V_CURRENT_LINE_REG;
+    gfx_info.VI_TIMING_REG = &VI_TIMING_REG;
+    gfx_info.VI_V_SYNC_REG = &VI_V_SYNC_REG;
+    gfx_info.VI_H_SYNC_REG = &VI_H_SYNC_REG;
+    gfx_info.VI_LEAP_REG = &VI_LEAP_REG;
+    gfx_info.VI_H_START_REG = &VI_H_START_REG;
+    gfx_info.VI_V_START_REG = &VI_V_START_REG;
+    gfx_info.VI_V_BURST_REG = &VI_V_BURST_REG;
+    gfx_info.VI_X_SCALE_REG = &VI_X_SCALE_REG;
+    gfx_info.VI_Y_SCALE_REG = &VI_Y_SCALE_REG;
+
+    gfx_info.CheckInterrupts = dummy_check_interrupts;
+    gfx_info.version = 2;
+    gfx_info.SP_STATUS_REG = &SP_STATUS_REG;
+    gfx_info.RDRAM_SIZE = &RDRAM_SIZE;
+
+	InitiateGFX(gfx_info);
+}
+
+void RT64SendDL(uint8_t* rdram, const OSTask* task) {
+    OSTask task_copy = *task;
+    task_copy.t.data_ptr &= 0x3FFFFFF;
+    task_copy.t.ucode &= 0x3FFFFFF;
+    task_copy.t.ucode_data &= 0x3FFFFFF;
+
+    memcpy(DMEM + 0xFC0, &task_copy, 0x40);
+
+    ProcessDList();
+}
+
+void RT64UpdateScreen(uint32_t vi_origin) {
+    VI_ORIGIN_REG = vi_origin;
+
+    UpdateScreen();
+}

src/sp.cpp

@@ -0,0 +1,50 @@
+#include <cstdio>
+#include <fstream>
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+extern "C" void osSpTaskLoad_recomp(uint8_t* rdram, recomp_context* ctx) {
+    // Nothing to do here
+}
+
+bool dump_frame = false;
+
+extern "C" void osSpTaskStartGo_recomp(uint8_t* rdram, recomp_context* ctx) {
+    //printf("[sp] osSpTaskStartGo(0x%08X)\n", (uint32_t)ctx->r4);
+    OSTask* task = TO_PTR(OSTask, ctx->r4);
+    if (task->t.type == M_GFXTASK) {
+        //printf("[sp] Gfx task: %08X\n", (uint32_t)ctx->r4);
+    } else if (task->t.type == M_AUDTASK) {
+        //printf("[sp] Audio task: %08X\n", (uint32_t)ctx->r4);
+    }
+    // For debugging
+    if (dump_frame) {
+        char addr_str[32];
+        constexpr size_t ram_size = 0x800000;
+        std::unique_ptr<char[]> ram_unswapped = std::make_unique<char[]>(ram_size);
+        snprintf(addr_str, sizeof(addr_str) - 1, "%08X", task->t.data_ptr);
+        addr_str[sizeof(addr_str) - 1] = '\0';
+        std::ofstream dump_file{ "ramdump" + std::string{ addr_str } + ".bin", std::ios::binary};
+
+        for (size_t i = 0; i < ram_size; i++) {
+            ram_unswapped[i] = rdram[i ^ 3];
+        }
+
+        dump_file.write(ram_unswapped.get(), ram_size);
+        dump_frame = false;
+    }
+    Multilibultra::submit_rsp_task(rdram, ctx->r4);
+}
+
+extern "C" void osSpTaskYield_recomp(uint8_t* rdram, recomp_context* ctx) {
+    // Ignore yield requests (acts as if the task completed before it received the yield request)
+}
+
+extern "C" void osSpTaskYielded_recomp(uint8_t* rdram, recomp_context* ctx) {
+    // Task yield requests are ignored, so always return 0 as tasks will never be yielded
+    ctx->r2 = 0;
+}
+
+extern "C" void __osSpSetPc_recomp(uint8_t* rdram, recomp_context* ctx) {
+    assert(false);
+}

src/vi.cpp

@@ -0,0 +1,38 @@
+#include "../portultra/multilibultra.hpp"
+#include "recomp.h"
+
+extern "C" void osViSetYScale_recomp(uint8_t* rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osViSetXScale_recomp(uint8_t* rdram, recomp_context * ctx) {
+    ;
+}
+
+extern "C" void osCreateViManager_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osViBlack_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osViSetSpecialFeatures_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}
+
+extern "C" void osViGetCurrentFramebuffer_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = (gpr)(int32_t)osViGetCurrentFramebuffer();
+}
+
+extern "C" void osViGetNextFramebuffer_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = (gpr)(int32_t)osViGetNextFramebuffer();
+}
+
+extern "C" void osViSwapBuffer_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osViSwapBuffer(rdram, (int32_t)ctx->r4);
+}
+
+extern "C" void osViSetMode_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ;
+}

thirdparty/blockingconcurrentqueue.h

@@ -0,0 +1,582 @@
+// Provides an efficient blocking version of moodycamel::ConcurrentQueue.
+// ©2015-2020 Cameron Desrochers. Distributed under the terms of the simplified
+// BSD license, available at the top of concurrentqueue.h.
+// Also dual-licensed under the Boost Software License (see LICENSE.md)
+// Uses Jeff Preshing's semaphore implementation (under the terms of its
+// separate zlib license, see lightweightsemaphore.h).
+
+#pragma once
+
+#include "concurrentqueue.h"
+#include "lightweightsemaphore.h"
+
+#include <type_traits>
+#include <cerrno>
+#include <memory>
+#include <chrono>
+#include <ctime>
+
+namespace moodycamel
+{
+// This is a blocking version of the queue. It has an almost identical interface to
+// the normal non-blocking version, with the addition of various wait_dequeue() methods
+// and the removal of producer-specific dequeue methods.
+template<typename T, typename Traits = ConcurrentQueueDefaultTraits>
+class BlockingConcurrentQueue
+{
+private:
+	typedef ::moodycamel::ConcurrentQueue<T, Traits> ConcurrentQueue;
+	typedef ::moodycamel::LightweightSemaphore LightweightSemaphore;
+
+public:
+	typedef typename ConcurrentQueue::producer_token_t producer_token_t;
+	typedef typename ConcurrentQueue::consumer_token_t consumer_token_t;
+	
+	typedef typename ConcurrentQueue::index_t index_t;
+	typedef typename ConcurrentQueue::size_t size_t;
+	typedef typename std::make_signed<size_t>::type ssize_t;
+	
+	static const size_t BLOCK_SIZE = ConcurrentQueue::BLOCK_SIZE;
+	static const size_t EXPLICIT_BLOCK_EMPTY_COUNTER_THRESHOLD = ConcurrentQueue::EXPLICIT_BLOCK_EMPTY_COUNTER_THRESHOLD;
+	static const size_t EXPLICIT_INITIAL_INDEX_SIZE = ConcurrentQueue::EXPLICIT_INITIAL_INDEX_SIZE;
+	static const size_t IMPLICIT_INITIAL_INDEX_SIZE = ConcurrentQueue::IMPLICIT_INITIAL_INDEX_SIZE;
+	static const size_t INITIAL_IMPLICIT_PRODUCER_HASH_SIZE = ConcurrentQueue::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE;
+	static const std::uint32_t EXPLICIT_CONSUMER_CONSUMPTION_QUOTA_BEFORE_ROTATE = ConcurrentQueue::EXPLICIT_CONSUMER_CONSUMPTION_QUOTA_BEFORE_ROTATE;
+	static const size_t MAX_SUBQUEUE_SIZE = ConcurrentQueue::MAX_SUBQUEUE_SIZE;
+	
+public:
+	// Creates a queue with at least `capacity` element slots; note that the
+	// actual number of elements that can be inserted without additional memory
+	// allocation depends on the number of producers and the block size (e.g. if
+	// the block size is equal to `capacity`, only a single block will be allocated
+	// up-front, which means only a single producer will be able to enqueue elements
+	// without an extra allocation -- blocks aren't shared between producers).
+	// This method is not thread safe -- it is up to the user to ensure that the
+	// queue is fully constructed before it starts being used by other threads (this
+	// includes making the memory effects of construction visible, possibly with a
+	// memory barrier).
+	explicit BlockingConcurrentQueue(size_t capacity = 6 * BLOCK_SIZE)
+		: inner(capacity), sema(create<LightweightSemaphore, ssize_t, int>(0, (int)Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
+	{
+		assert(reinterpret_cast<ConcurrentQueue*>((BlockingConcurrentQueue*)1) == &((BlockingConcurrentQueue*)1)->inner && "BlockingConcurrentQueue must have ConcurrentQueue as its first member");
+		if (!sema) {
+			MOODYCAMEL_THROW(std::bad_alloc());
+		}
+	}
+	
+	BlockingConcurrentQueue(size_t minCapacity, size_t maxExplicitProducers, size_t maxImplicitProducers)
+		: inner(minCapacity, maxExplicitProducers, maxImplicitProducers), sema(create<LightweightSemaphore, ssize_t, int>(0, (int)Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
+	{
+		assert(reinterpret_cast<ConcurrentQueue*>((BlockingConcurrentQueue*)1) == &((BlockingConcurrentQueue*)1)->inner && "BlockingConcurrentQueue must have ConcurrentQueue as its first member");
+		if (!sema) {
+			MOODYCAMEL_THROW(std::bad_alloc());
+		}
+	}
+	
+	// Disable copying and copy assignment
+	BlockingConcurrentQueue(BlockingConcurrentQueue const&) MOODYCAMEL_DELETE_FUNCTION;
+	BlockingConcurrentQueue& operator=(BlockingConcurrentQueue const&) MOODYCAMEL_DELETE_FUNCTION;
+	
+	// Moving is supported, but note that it is *not* a thread-safe operation.
+	// Nobody can use the queue while it's being moved, and the memory effects
+	// of that move must be propagated to other threads before they can use it.
+	// Note: When a queue is moved, its tokens are still valid but can only be
+	// used with the destination queue (i.e. semantically they are moved along
+	// with the queue itself).
+	BlockingConcurrentQueue(BlockingConcurrentQueue&& other) MOODYCAMEL_NOEXCEPT
+		: inner(std::move(other.inner)), sema(std::move(other.sema))
+	{ }
+	
+	inline BlockingConcurrentQueue& operator=(BlockingConcurrentQueue&& other) MOODYCAMEL_NOEXCEPT
+	{
+		return swap_internal(other);
+	}
+	
+	// Swaps this queue's state with the other's. Not thread-safe.
+	// Swapping two queues does not invalidate their tokens, however
+	// the tokens that were created for one queue must be used with
+	// only the swapped queue (i.e. the tokens are tied to the
+	// queue's movable state, not the object itself).
+	inline void swap(BlockingConcurrentQueue& other) MOODYCAMEL_NOEXCEPT
+	{
+		swap_internal(other);
+	}
+	
+private:
+	BlockingConcurrentQueue& swap_internal(BlockingConcurrentQueue& other)
+	{
+		if (this == &other) {
+			return *this;
+		}
+		
+		inner.swap(other.inner);
+		sema.swap(other.sema);
+		return *this;
+	}
+	
+public:
+	// Enqueues a single item (by copying it).
+	// Allocates memory if required. Only fails if memory allocation fails (or implicit
+	// production is disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE is 0,
+	// or Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Thread-safe.
+	inline bool enqueue(T const& item)
+	{
+		if ((details::likely)(inner.enqueue(item))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by moving it, if possible).
+	// Allocates memory if required. Only fails if memory allocation fails (or implicit
+	// production is disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE is 0,
+	// or Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Thread-safe.
+	inline bool enqueue(T&& item)
+	{
+		if ((details::likely)(inner.enqueue(std::move(item)))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by copying it) using an explicit producer token.
+	// Allocates memory if required. Only fails if memory allocation fails (or
+	// Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Thread-safe.
+	inline bool enqueue(producer_token_t const& token, T const& item)
+	{
+		if ((details::likely)(inner.enqueue(token, item))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by moving it, if possible) using an explicit producer token.
+	// Allocates memory if required. Only fails if memory allocation fails (or
+	// Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Thread-safe.
+	inline bool enqueue(producer_token_t const& token, T&& item)
+	{
+		if ((details::likely)(inner.enqueue(token, std::move(item)))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues several items.
+	// Allocates memory if required. Only fails if memory allocation fails (or
+	// implicit production is disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE
+	// is 0, or Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Note: Use std::make_move_iterator if the elements should be moved instead of copied.
+	// Thread-safe.
+	template<typename It>
+	inline bool enqueue_bulk(It itemFirst, size_t count)
+	{
+		if ((details::likely)(inner.enqueue_bulk(std::forward<It>(itemFirst), count))) {
+			sema->signal((LightweightSemaphore::ssize_t)(ssize_t)count);
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues several items using an explicit producer token.
+	// Allocates memory if required. Only fails if memory allocation fails
+	// (or Traits::MAX_SUBQUEUE_SIZE has been defined and would be surpassed).
+	// Note: Use std::make_move_iterator if the elements should be moved
+	// instead of copied.
+	// Thread-safe.
+	template<typename It>
+	inline bool enqueue_bulk(producer_token_t const& token, It itemFirst, size_t count)
+	{
+		if ((details::likely)(inner.enqueue_bulk(token, std::forward<It>(itemFirst), count))) {
+			sema->signal((LightweightSemaphore::ssize_t)(ssize_t)count);
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by copying it).
+	// Does not allocate memory. Fails if not enough room to enqueue (or implicit
+	// production is disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE
+	// is 0).
+	// Thread-safe.
+	inline bool try_enqueue(T const& item)
+	{
+		if (inner.try_enqueue(item)) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by moving it, if possible).
+	// Does not allocate memory (except for one-time implicit producer).
+	// Fails if not enough room to enqueue (or implicit production is
+	// disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE is 0).
+	// Thread-safe.
+	inline bool try_enqueue(T&& item)
+	{
+		if (inner.try_enqueue(std::move(item))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by copying it) using an explicit producer token.
+	// Does not allocate memory. Fails if not enough room to enqueue.
+	// Thread-safe.
+	inline bool try_enqueue(producer_token_t const& token, T const& item)
+	{
+		if (inner.try_enqueue(token, item)) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues a single item (by moving it, if possible) using an explicit producer token.
+	// Does not allocate memory. Fails if not enough room to enqueue.
+	// Thread-safe.
+	inline bool try_enqueue(producer_token_t const& token, T&& item)
+	{
+		if (inner.try_enqueue(token, std::move(item))) {
+			sema->signal();
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues several items.
+	// Does not allocate memory (except for one-time implicit producer).
+	// Fails if not enough room to enqueue (or implicit production is
+	// disabled because Traits::INITIAL_IMPLICIT_PRODUCER_HASH_SIZE is 0).
+	// Note: Use std::make_move_iterator if the elements should be moved
+	// instead of copied.
+	// Thread-safe.
+	template<typename It>
+	inline bool try_enqueue_bulk(It itemFirst, size_t count)
+	{
+		if (inner.try_enqueue_bulk(std::forward<It>(itemFirst), count)) {
+			sema->signal((LightweightSemaphore::ssize_t)(ssize_t)count);
+			return true;
+		}
+		return false;
+	}
+	
+	// Enqueues several items using an explicit producer token.
+	// Does not allocate memory. Fails if not enough room to enqueue.
+	// Note: Use std::make_move_iterator if the elements should be moved
+	// instead of copied.
+	// Thread-safe.
+	template<typename It>
+	inline bool try_enqueue_bulk(producer_token_t const& token, It itemFirst, size_t count)
+	{
+		if (inner.try_enqueue_bulk(token, std::forward<It>(itemFirst), count)) {
+			sema->signal((LightweightSemaphore::ssize_t)(ssize_t)count);
+			return true;
+		}
+		return false;
+	}
+	
+	
+	// Attempts to dequeue from the queue.
+	// Returns false if all producer streams appeared empty at the time they
+	// were checked (so, the queue is likely but not guaranteed to be empty).
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline bool try_dequeue(U& item)
+	{
+		if (sema->tryWait()) {
+			while (!inner.try_dequeue(item)) {
+				continue;
+			}
+			return true;
+		}
+		return false;
+	}
+	
+	// Attempts to dequeue from the queue using an explicit consumer token.
+	// Returns false if all producer streams appeared empty at the time they
+	// were checked (so, the queue is likely but not guaranteed to be empty).
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline bool try_dequeue(consumer_token_t& token, U& item)
+	{
+		if (sema->tryWait()) {
+			while (!inner.try_dequeue(token, item)) {
+				continue;
+			}
+			return true;
+		}
+		return false;
+	}
+	
+	// Attempts to dequeue several elements from the queue.
+	// Returns the number of items actually dequeued.
+	// Returns 0 if all producer streams appeared empty at the time they
+	// were checked (so, the queue is likely but not guaranteed to be empty).
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t try_dequeue_bulk(It itemFirst, size_t max)
+	{
+		size_t count = 0;
+		max = (size_t)sema->tryWaitMany((LightweightSemaphore::ssize_t)(ssize_t)max);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(itemFirst, max - count);
+		}
+		return count;
+	}
+	
+	// Attempts to dequeue several elements from the queue using an explicit consumer token.
+	// Returns the number of items actually dequeued.
+	// Returns 0 if all producer streams appeared empty at the time they
+	// were checked (so, the queue is likely but not guaranteed to be empty).
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t try_dequeue_bulk(consumer_token_t& token, It itemFirst, size_t max)
+	{
+		size_t count = 0;
+		max = (size_t)sema->tryWaitMany((LightweightSemaphore::ssize_t)(ssize_t)max);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(token, itemFirst, max - count);
+		}
+		return count;
+	}
+	
+	
+	
+	// Blocks the current thread until there's something to dequeue, then
+	// dequeues it.
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline void wait_dequeue(U& item)
+	{
+		while (!sema->wait()) {
+			continue;
+		}
+		while (!inner.try_dequeue(item)) {
+			continue;
+		}
+	}
+
+	// Blocks the current thread until either there's something to dequeue
+	// or the timeout (specified in microseconds) expires. Returns false
+	// without setting `item` if the timeout expires, otherwise assigns
+	// to `item` and returns true.
+	// Using a negative timeout indicates an indefinite timeout,
+	// and is thus functionally equivalent to calling wait_dequeue.
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline bool wait_dequeue_timed(U& item, std::int64_t timeout_usecs)
+	{
+		if (!sema->wait(timeout_usecs)) {
+			return false;
+		}
+		while (!inner.try_dequeue(item)) {
+			continue;
+		}
+		return true;
+	}
+    
+    // Blocks the current thread until either there's something to dequeue
+	// or the timeout expires. Returns false without setting `item` if the
+    // timeout expires, otherwise assigns to `item` and returns true.
+	// Never allocates. Thread-safe.
+	template<typename U, typename Rep, typename Period>
+	inline bool wait_dequeue_timed(U& item, std::chrono::duration<Rep, Period> const& timeout)
+    {
+        return wait_dequeue_timed(item, std::chrono::duration_cast<std::chrono::microseconds>(timeout).count());
+    }
+	
+	// Blocks the current thread until there's something to dequeue, then
+	// dequeues it using an explicit consumer token.
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline void wait_dequeue(consumer_token_t& token, U& item)
+	{
+		while (!sema->wait()) {
+			continue;
+		}
+		while (!inner.try_dequeue(token, item)) {
+			continue;
+		}
+	}
+	
+	// Blocks the current thread until either there's something to dequeue
+	// or the timeout (specified in microseconds) expires. Returns false
+	// without setting `item` if the timeout expires, otherwise assigns
+	// to `item` and returns true.
+	// Using a negative timeout indicates an indefinite timeout,
+	// and is thus functionally equivalent to calling wait_dequeue.
+	// Never allocates. Thread-safe.
+	template<typename U>
+	inline bool wait_dequeue_timed(consumer_token_t& token, U& item, std::int64_t timeout_usecs)
+	{
+		if (!sema->wait(timeout_usecs)) {
+			return false;
+		}
+		while (!inner.try_dequeue(token, item)) {
+			continue;
+		}
+		return true;
+	}
+    
+    // Blocks the current thread until either there's something to dequeue
+	// or the timeout expires. Returns false without setting `item` if the
+    // timeout expires, otherwise assigns to `item` and returns true.
+	// Never allocates. Thread-safe.
+	template<typename U, typename Rep, typename Period>
+	inline bool wait_dequeue_timed(consumer_token_t& token, U& item, std::chrono::duration<Rep, Period> const& timeout)
+    {
+        return wait_dequeue_timed(token, item, std::chrono::duration_cast<std::chrono::microseconds>(timeout).count());
+    }
+	
+	// Attempts to dequeue several elements from the queue.
+	// Returns the number of items actually dequeued, which will
+	// always be at least one (this method blocks until the queue
+	// is non-empty) and at most max.
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t wait_dequeue_bulk(It itemFirst, size_t max)
+	{
+		size_t count = 0;
+		max = (size_t)sema->waitMany((LightweightSemaphore::ssize_t)(ssize_t)max);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(itemFirst, max - count);
+		}
+		return count;
+	}
+	
+	// Attempts to dequeue several elements from the queue.
+	// Returns the number of items actually dequeued, which can
+	// be 0 if the timeout expires while waiting for elements,
+	// and at most max.
+	// Using a negative timeout indicates an indefinite timeout,
+	// and is thus functionally equivalent to calling wait_dequeue_bulk.
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t wait_dequeue_bulk_timed(It itemFirst, size_t max, std::int64_t timeout_usecs)
+	{
+		size_t count = 0;
+		max = (size_t)sema->waitMany((LightweightSemaphore::ssize_t)(ssize_t)max, timeout_usecs);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(itemFirst, max - count);
+		}
+		return count;
+	}
+    
+    // Attempts to dequeue several elements from the queue.
+	// Returns the number of items actually dequeued, which can
+	// be 0 if the timeout expires while waiting for elements,
+	// and at most max.
+	// Never allocates. Thread-safe.
+	template<typename It, typename Rep, typename Period>
+	inline size_t wait_dequeue_bulk_timed(It itemFirst, size_t max, std::chrono::duration<Rep, Period> const& timeout)
+    {
+        return wait_dequeue_bulk_timed<It&>(itemFirst, max, std::chrono::duration_cast<std::chrono::microseconds>(timeout).count());
+    }
+	
+	// Attempts to dequeue several elements from the queue using an explicit consumer token.
+	// Returns the number of items actually dequeued, which will
+	// always be at least one (this method blocks until the queue
+	// is non-empty) and at most max.
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t wait_dequeue_bulk(consumer_token_t& token, It itemFirst, size_t max)
+	{
+		size_t count = 0;
+		max = (size_t)sema->waitMany((LightweightSemaphore::ssize_t)(ssize_t)max);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(token, itemFirst, max - count);
+		}
+		return count;
+	}
+	
+	// Attempts to dequeue several elements from the queue using an explicit consumer token.
+	// Returns the number of items actually dequeued, which can
+	// be 0 if the timeout expires while waiting for elements,
+	// and at most max.
+	// Using a negative timeout indicates an indefinite timeout,
+	// and is thus functionally equivalent to calling wait_dequeue_bulk.
+	// Never allocates. Thread-safe.
+	template<typename It>
+	inline size_t wait_dequeue_bulk_timed(consumer_token_t& token, It itemFirst, size_t max, std::int64_t timeout_usecs)
+	{
+		size_t count = 0;
+		max = (size_t)sema->waitMany((LightweightSemaphore::ssize_t)(ssize_t)max, timeout_usecs);
+		while (count != max) {
+			count += inner.template try_dequeue_bulk<It&>(token, itemFirst, max - count);
+		}
+		return count;
+	}
+	
+	// Attempts to dequeue several elements from the queue using an explicit consumer token.
+	// Returns the number of items actually dequeued, which can
+	// be 0 if the timeout expires while waiting for elements,
+	// and at most max.
+	// Never allocates. Thread-safe.
+	template<typename It, typename Rep, typename Period>
+	inline size_t wait_dequeue_bulk_timed(consumer_token_t& token, It itemFirst, size_t max, std::chrono::duration<Rep, Period> const& timeout)
+    {
+        return wait_dequeue_bulk_timed<It&>(token, itemFirst, max, std::chrono::duration_cast<std::chrono::microseconds>(timeout).count());
+    }
+	
+	
+	// Returns an estimate of the total number of elements currently in the queue. This
+	// estimate is only accurate if the queue has completely stabilized before it is called
+	// (i.e. all enqueue and dequeue operations have completed and their memory effects are
+	// visible on the calling thread, and no further operations start while this method is
+	// being called).
+	// Thread-safe.
+	inline size_t size_approx() const
+	{
+		return (size_t)sema->availableApprox();
+	}
+	
+	
+	// Returns true if the underlying atomic variables used by
+	// the queue are lock-free (they should be on most platforms).
+	// Thread-safe.
+	static constexpr bool is_lock_free()
+	{
+		return ConcurrentQueue::is_lock_free();
+	}
+	
+
+private:
+	template<typename U, typename A1, typename A2>
+	static inline U* create(A1&& a1, A2&& a2)
+	{
+		void* p = (Traits::malloc)(sizeof(U));
+		return p != nullptr ? new (p) U(std::forward<A1>(a1), std::forward<A2>(a2)) : nullptr;
+	}
+	
+	template<typename U>
+	static inline void destroy(U* p)
+	{
+		if (p != nullptr) {
+			p->~U();
+		}
+		(Traits::free)(p);
+	}
+	
+private:
+	ConcurrentQueue inner;
+	std::unique_ptr<LightweightSemaphore, void (*)(LightweightSemaphore*)> sema;
+};
+
+
+template<typename T, typename Traits>
+inline void swap(BlockingConcurrentQueue<T, Traits>& a, BlockingConcurrentQueue<T, Traits>& b) MOODYCAMEL_NOEXCEPT
+{
+	a.swap(b);
+}
+
+}	// end namespace moodycamel

thirdparty/lightweightsemaphore.h

@@ -0,0 +1,425 @@
+// Provides an efficient implementation of a semaphore (LightweightSemaphore).
+// This is an extension of Jeff Preshing's sempahore implementation (licensed 
+// under the terms of its separate zlib license) that has been adapted and
+// extended by Cameron Desrochers.
+
+#pragma once
+
+#include <cstddef> // For std::size_t
+#include <atomic>
+#include <type_traits> // For std::make_signed<T>
+
+#if defined(_WIN32)
+// Avoid including windows.h in a header; we only need a handful of
+// items, so we'll redeclare them here (this is relatively safe since
+// the API generally has to remain stable between Windows versions).
+// I know this is an ugly hack but it still beats polluting the global
+// namespace with thousands of generic names or adding a .cpp for nothing.
+extern "C" {
+	struct _SECURITY_ATTRIBUTES;
+	__declspec(dllimport) void* __stdcall CreateSemaphoreW(_SECURITY_ATTRIBUTES* lpSemaphoreAttributes, long lInitialCount, long lMaximumCount, const wchar_t* lpName);
+	__declspec(dllimport) int __stdcall CloseHandle(void* hObject);
+	__declspec(dllimport) unsigned long __stdcall WaitForSingleObject(void* hHandle, unsigned long dwMilliseconds);
+	__declspec(dllimport) int __stdcall ReleaseSemaphore(void* hSemaphore, long lReleaseCount, long* lpPreviousCount);
+}
+#elif defined(__MACH__)
+#include <mach/mach.h>
+#elif defined(__unix__)
+#include <semaphore.h>
+
+#if defined(__GLIBC_PREREQ) && defined(_GNU_SOURCE)
+#if __GLIBC_PREREQ(2,30)
+#define MOODYCAMEL_LIGHTWEIGHTSEMAPHORE_MONOTONIC
+#endif
+#endif
+#endif
+
+namespace moodycamel
+{
+namespace details
+{
+
+// Code in the mpmc_sema namespace below is an adaptation of Jeff Preshing's
+// portable + lightweight semaphore implementations, originally from
+// https://github.com/preshing/cpp11-on-multicore/blob/master/common/sema.h
+// LICENSE:
+// Copyright (c) 2015 Jeff Preshing
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//	claim that you wrote the original software. If you use this software
+//	in a product, an acknowledgement in the product documentation would be
+//	appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//	misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+#if defined(_WIN32)
+class Semaphore
+{
+private:
+	void* m_hSema;
+	
+	Semaphore(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+	Semaphore& operator=(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+
+public:
+	Semaphore(int initialCount = 0)
+	{
+		assert(initialCount >= 0);
+		const long maxLong = 0x7fffffff;
+		m_hSema = CreateSemaphoreW(nullptr, initialCount, maxLong, nullptr);
+		assert(m_hSema);
+	}
+
+	~Semaphore()
+	{
+		CloseHandle(m_hSema);
+	}
+
+	bool wait()
+	{
+		const unsigned long infinite = 0xffffffff;
+		return WaitForSingleObject(m_hSema, infinite) == 0;
+	}
+	
+	bool try_wait()
+	{
+		return WaitForSingleObject(m_hSema, 0) == 0;
+	}
+	
+	bool timed_wait(std::uint64_t usecs)
+	{
+		return WaitForSingleObject(m_hSema, (unsigned long)(usecs / 1000)) == 0;
+	}
+
+	void signal(int count = 1)
+	{
+		while (!ReleaseSemaphore(m_hSema, count, nullptr));
+	}
+};
+#elif defined(__MACH__)
+//---------------------------------------------------------
+// Semaphore (Apple iOS and OSX)
+// Can't use POSIX semaphores due to http://lists.apple.com/archives/darwin-kernel/2009/Apr/msg00010.html
+//---------------------------------------------------------
+class Semaphore
+{
+private:
+	semaphore_t m_sema;
+
+	Semaphore(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+	Semaphore& operator=(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+
+public:
+	Semaphore(int initialCount = 0)
+	{
+		assert(initialCount >= 0);
+		kern_return_t rc = semaphore_create(mach_task_self(), &m_sema, SYNC_POLICY_FIFO, initialCount);
+		assert(rc == KERN_SUCCESS);
+		(void)rc;
+	}
+
+	~Semaphore()
+	{
+		semaphore_destroy(mach_task_self(), m_sema);
+	}
+
+	bool wait()
+	{
+		return semaphore_wait(m_sema) == KERN_SUCCESS;
+	}
+	
+	bool try_wait()
+	{
+		return timed_wait(0);
+	}
+	
+	bool timed_wait(std::uint64_t timeout_usecs)
+	{
+		mach_timespec_t ts;
+		ts.tv_sec = static_cast<unsigned int>(timeout_usecs / 1000000);
+		ts.tv_nsec = static_cast<int>((timeout_usecs % 1000000) * 1000);
+
+		// added in OSX 10.10: https://developer.apple.com/library/prerelease/mac/documentation/General/Reference/APIDiffsMacOSX10_10SeedDiff/modules/Darwin.html
+		kern_return_t rc = semaphore_timedwait(m_sema, ts);
+		return rc == KERN_SUCCESS;
+	}
+
+	void signal()
+	{
+		while (semaphore_signal(m_sema) != KERN_SUCCESS);
+	}
+
+	void signal(int count)
+	{
+		while (count-- > 0)
+		{
+			while (semaphore_signal(m_sema) != KERN_SUCCESS);
+		}
+	}
+};
+#elif defined(__unix__)
+//---------------------------------------------------------
+// Semaphore (POSIX, Linux)
+//---------------------------------------------------------
+class Semaphore
+{
+private:
+	sem_t m_sema;
+
+	Semaphore(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+	Semaphore& operator=(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
+
+public:
+	Semaphore(int initialCount = 0)
+	{
+		assert(initialCount >= 0);
+		int rc = sem_init(&m_sema, 0, static_cast<unsigned int>(initialCount));
+		assert(rc == 0);
+		(void)rc;
+	}
+
+	~Semaphore()
+	{
+		sem_destroy(&m_sema);
+	}
+
+	bool wait()
+	{
+		// http://stackoverflow.com/questions/2013181/gdb-causes-sem-wait-to-fail-with-eintr-error
+		int rc;
+		do {
+			rc = sem_wait(&m_sema);
+		} while (rc == -1 && errno == EINTR);
+		return rc == 0;
+	}
+
+	bool try_wait()
+	{
+		int rc;
+		do {
+			rc = sem_trywait(&m_sema);
+		} while (rc == -1 && errno == EINTR);
+		return rc == 0;
+	}
+
+	bool timed_wait(std::uint64_t usecs)
+	{
+		struct timespec ts;
+		const int usecs_in_1_sec = 1000000;
+		const int nsecs_in_1_sec = 1000000000;
+#ifdef MOODYCAMEL_LIGHTWEIGHTSEMAPHORE_MONOTONIC
+		clock_gettime(CLOCK_MONOTONIC, &ts);
+#else
+		clock_gettime(CLOCK_REALTIME, &ts);
+#endif
+		ts.tv_sec += (time_t)(usecs / usecs_in_1_sec);
+		ts.tv_nsec += (long)(usecs % usecs_in_1_sec) * 1000;
+		// sem_timedwait bombs if you have more than 1e9 in tv_nsec
+		// so we have to clean things up before passing it in
+		if (ts.tv_nsec >= nsecs_in_1_sec) {
+			ts.tv_nsec -= nsecs_in_1_sec;
+			++ts.tv_sec;
+		}
+
+		int rc;
+		do {
+#ifdef MOODYCAMEL_LIGHTWEIGHTSEMAPHORE_MONOTONIC
+			rc = sem_clockwait(&m_sema, CLOCK_MONOTONIC, &ts);
+#else
+			rc = sem_timedwait(&m_sema, &ts);
+#endif
+		} while (rc == -1 && errno == EINTR);
+		return rc == 0;
+	}
+
+	void signal()
+	{
+		while (sem_post(&m_sema) == -1);
+	}
+
+	void signal(int count)
+	{
+		while (count-- > 0)
+		{
+			while (sem_post(&m_sema) == -1);
+		}
+	}
+};
+#else
+#error Unsupported platform! (No semaphore wrapper available)
+#endif
+
+}	// end namespace details
+
+
+//---------------------------------------------------------
+// LightweightSemaphore
+//---------------------------------------------------------
+class LightweightSemaphore
+{
+public:
+	typedef std::make_signed<std::size_t>::type ssize_t;
+
+private:
+	std::atomic<ssize_t> m_count;
+	details::Semaphore m_sema;
+	int m_maxSpins;
+
+	bool waitWithPartialSpinning(std::int64_t timeout_usecs = -1)
+	{
+		ssize_t oldCount;
+		int spin = m_maxSpins;
+		while (--spin >= 0)
+		{
+			oldCount = m_count.load(std::memory_order_relaxed);
+			if ((oldCount > 0) && m_count.compare_exchange_strong(oldCount, oldCount - 1, std::memory_order_acquire, std::memory_order_relaxed))
+				return true;
+			std::atomic_signal_fence(std::memory_order_acquire);	 // Prevent the compiler from collapsing the loop.
+		}
+		oldCount = m_count.fetch_sub(1, std::memory_order_acquire);
+		if (oldCount > 0)
+			return true;
+		if (timeout_usecs < 0)
+		{
+			if (m_sema.wait())
+				return true;
+		}
+		if (timeout_usecs > 0 && m_sema.timed_wait((std::uint64_t)timeout_usecs))
+			return true;
+		// At this point, we've timed out waiting for the semaphore, but the
+		// count is still decremented indicating we may still be waiting on
+		// it. So we have to re-adjust the count, but only if the semaphore
+		// wasn't signaled enough times for us too since then. If it was, we
+		// need to release the semaphore too.
+		while (true)
+		{
+			oldCount = m_count.load(std::memory_order_acquire);
+			if (oldCount >= 0 && m_sema.try_wait())
+				return true;
+			if (oldCount < 0 && m_count.compare_exchange_strong(oldCount, oldCount + 1, std::memory_order_relaxed, std::memory_order_relaxed))
+				return false;
+		}
+	}
+
+	ssize_t waitManyWithPartialSpinning(ssize_t max, std::int64_t timeout_usecs = -1)
+	{
+		assert(max > 0);
+		ssize_t oldCount;
+		int spin = m_maxSpins;
+		while (--spin >= 0)
+		{
+			oldCount = m_count.load(std::memory_order_relaxed);
+			if (oldCount > 0)
+			{
+				ssize_t newCount = oldCount > max ? oldCount - max : 0;
+				if (m_count.compare_exchange_strong(oldCount, newCount, std::memory_order_acquire, std::memory_order_relaxed))
+					return oldCount - newCount;
+			}
+			std::atomic_signal_fence(std::memory_order_acquire);
+		}
+		oldCount = m_count.fetch_sub(1, std::memory_order_acquire);
+		if (oldCount <= 0)
+		{
+			if ((timeout_usecs == 0) || (timeout_usecs < 0 && !m_sema.wait()) || (timeout_usecs > 0 && !m_sema.timed_wait((std::uint64_t)timeout_usecs)))
+			{
+				while (true)
+				{
+					oldCount = m_count.load(std::memory_order_acquire);
+					if (oldCount >= 0 && m_sema.try_wait())
+						break;
+					if (oldCount < 0 && m_count.compare_exchange_strong(oldCount, oldCount + 1, std::memory_order_relaxed, std::memory_order_relaxed))
+						return 0;
+				}
+			}
+		}
+		if (max > 1)
+			return 1 + tryWaitMany(max - 1);
+		return 1;
+	}
+
+public:
+	LightweightSemaphore(ssize_t initialCount = 0, int maxSpins = 10000) : m_count(initialCount), m_maxSpins(maxSpins)
+	{
+		assert(initialCount >= 0);
+		assert(maxSpins >= 0);
+	}
+
+	bool tryWait()
+	{
+		ssize_t oldCount = m_count.load(std::memory_order_relaxed);
+		while (oldCount > 0)
+		{
+			if (m_count.compare_exchange_weak(oldCount, oldCount - 1, std::memory_order_acquire, std::memory_order_relaxed))
+				return true;
+		}
+		return false;
+	}
+
+	bool wait()
+	{
+		return tryWait() || waitWithPartialSpinning();
+	}
+
+	bool wait(std::int64_t timeout_usecs)
+	{
+		return tryWait() || waitWithPartialSpinning(timeout_usecs);
+	}
+
+	// Acquires between 0 and (greedily) max, inclusive
+	ssize_t tryWaitMany(ssize_t max)
+	{
+		assert(max >= 0);
+		ssize_t oldCount = m_count.load(std::memory_order_relaxed);
+		while (oldCount > 0)
+		{
+			ssize_t newCount = oldCount > max ? oldCount - max : 0;
+			if (m_count.compare_exchange_weak(oldCount, newCount, std::memory_order_acquire, std::memory_order_relaxed))
+				return oldCount - newCount;
+		}
+		return 0;
+	}
+
+	// Acquires at least one, and (greedily) at most max
+	ssize_t waitMany(ssize_t max, std::int64_t timeout_usecs)
+	{
+		assert(max >= 0);
+		ssize_t result = tryWaitMany(max);
+		if (result == 0 && max > 0)
+			result = waitManyWithPartialSpinning(max, timeout_usecs);
+		return result;
+	}
+	
+	ssize_t waitMany(ssize_t max)
+	{
+		ssize_t result = waitMany(max, -1);
+		assert(result > 0);
+		return result;
+	}
+
+	void signal(ssize_t count = 1)
+	{
+		assert(count >= 0);
+		ssize_t oldCount = m_count.fetch_add(count, std::memory_order_release);
+		ssize_t toRelease = -oldCount < count ? -oldCount : count;
+		if (toRelease > 0)
+		{
+			m_sema.signal((int)toRelease);
+		}
+	}
+	
+	std::size_t availableApprox() const
+	{
+		ssize_t count = m_count.load(std::memory_order_relaxed);
+		return count > 0 ? static_cast<std::size_t>(count) : 0;
+	}
+};
+
+}   // end namespace moodycamel