move RSP callbacks (and related RSP stuff) to its own file

ultramodern/CMakeLists.txt

@@ -14,12 +14,15 @@ add_library(ultramodern STATIC
     "${CMAKE_CURRENT_SOURCE_DIR}/src/events.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/mesgqueue.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/misc_ultra.cpp"
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/rsp.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/rt64_layer.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/scheduling.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/task_win32.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/threadqueue.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/threads.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/src/timer.cpp"
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/ultrainit.cpp"
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/user_callbacks.cpp"
 )
 
 target_include_directories(ultramodern PUBLIC

ultramodern/include/ultramodern/rsp_stuff.hpp

@@ -5,6 +5,8 @@
 
 #include <cstdint>
 
+#include "ultra64.h"
+
 // TODO: Move these to ultramodern namespace?
 
 enum class RspExitReason {
@@ -21,4 +23,37 @@ extern uint8_t dmem[];
 extern uint16_t rspReciprocals[512];
 extern uint16_t rspInverseSquareRoots[512];
 
+namespace ultramodern {
+    namespace rsp {
+        struct rsp_callbacks_t {
+            /**
+             * Simulate a DMA copy from RDRAM (CPU) to DMEM (RSP).
+             *
+             * This function should fill the ultramodern's `dmem` by reading from the `rdram` parameter.
+             *
+             * IMPORTANTE: This callback is required and must be non-`nullptr` when initializing the user callbacks.
+             */
+            void (*dma_rdram_to_dmem)(uint8_t* rdram, uint32_t dmem_addr, uint32_t dram_addr, uint32_t rd_len);
+
+            /**
+             * Return a function pointer to the corresponding RSP microcode function for the given `task_type`.
+             *
+             * The full OSTask (`task` parameter) is passed in case the `task_type` number is not enough information to distinguish out the exact microcode function.
+             *
+             * This function is allowed to return `nullptr` if no microcode matches the specified task. In this case a message will be printed to stderr and the program will exit.
+             *
+             * IMPORTANTE: This callback is required and must be non-`nullptr` when initializing the user callbacks.
+             */
+            RspUcodeFunc* (*get_rsp_microcode)(uint32_t task_type, OSTask* task);
+        };
+
+        void set_callbacks(const rsp_callbacks_t& callbacks);
+
+        void constants_init();
+
+        RspUcodeFunc* get_microcode(uint32_t task_type, OSTask* task);
+        void run_microcode(uint8_t* rdram, const OSTask* task, RspUcodeFunc* ucode_func);
+    };
+} // namespace ultramodern
+
 #endif

ultramodern/include/ultramodern/ultramodern.hpp

@@ -151,6 +151,7 @@ struct gfx_callbacks_t {
     create_window_t* create_window;
     update_gfx_t* update_gfx;
 };
+
 bool is_game_started();
 void quit();
 void join_event_threads();

ultramodern/include/ultramodern/user_callbacks.hpp

@@ -23,28 +23,6 @@ namespace ultramodern {
          * `msg` is non-`nullptr`.
          */
         void (*message_box)(const char* msg);
-
-        // RSP
-
-        /**
-         * Simulate a DMA copy from RDRAM (CPU) to DMEM (RSP).
-         *
-         * This function should fill the ultramodern's `dmem` by reading from the `rdram` parameter.
-         *
-         * IMPORTANTE: This callback is required and must be non-`nullptr` when initializing the user callbacks.
-         */
-        void (*dma_rdram_to_dmem)(uint8_t* rdram, uint32_t dmem_addr, uint32_t dram_addr, uint32_t rd_len);
-
-        /**
-         * Return a function pointer to the corresponding RSP microcode function for the given `task_type`.
-         * 
-         * The full OSTask (`task` parameter) is passed in case the `task_type` number is not enough information to distinguish out the exact microcode function.
-         * 
-         * This function is allowed to return `nullptr` if no microcode matches the specified task. In this case a message will be printed to stderr and the program will exit.
-         * 
-         * IMPORTANTE: This callback is required and must be non-`nullptr` when initializing the user callbacks.
-         */
-        RspUcodeFunc* (*get_rsp_microcode)(uint32_t task_type, OSTask* task);
     };
 
     /**

ultramodern/src/events.cpp

@@ -193,45 +193,6 @@ void dp_complete() {
     osSendMesg(PASS_RDRAM events_context.dp.mq, events_context.dp.msg, OS_MESG_NOBLOCK);
 }
 
-uint8_t dmem[0x1000];
-uint16_t rspReciprocals[512];
-uint16_t rspInverseSquareRoots[512];
-
-// 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));
-
-    auto& user_callbacks = ultramodern::get_user_callbacks();
-    assert(user_callbacks.dma_rdram_to_dmem != nullptr);
-
-    // Load the ucode data into DMEM
-    user_callbacks.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);
-}
-
 void task_thread_func(uint8_t* rdram, moodycamel::LightweightSemaphore* thread_ready) {
     ultramodern::set_native_thread_name("SP Task Thread");
     ultramodern::set_native_thread_priority(ultramodern::ThreadPriority::Normal);
@@ -251,11 +212,10 @@ void task_thread_func(uint8_t* rdram, moodycamel::LightweightSemaphore* thread_r
         }
 
         // Ask the user what the correct ucode function is this.
-        assert(user_callbacks.get_rsp_microcode != nullptr);
-        RspUcodeFunc* ucode_func = user_callbacks.get_rsp_microcode(task->t.type, task);
+        RspUcodeFunc* ucode_func = ultramodern::rsp::get_microcode(task->t.type, task);
 
         if (ucode_func != nullptr) {
-            run_rsp_microcode(rdram, task, ucode_func);
+            ultramodern::rsp::run_microcode(rdram, task, ucode_func);
         }
         else {
             fprintf(stderr, "Unknown task type: %" PRIu32 "\n", task->t.type);
@@ -330,7 +290,7 @@ void gfx_thread_func(uint8_t* rdram, moodycamel::LightweightSemaphore* thread_re
         user_callbacks.update_supported_options();
     }
 
-    rsp_constants_init();
+    ultramodern::rsp::constants_init();
 
     // Notify the caller thread that this thread is ready.
     thread_ready->signal();

ultramodern/src/rsp.cpp

@@ -0,0 +1,57 @@
+#include <cassert>
+#include <cstring>
+
+#include "rsp_stuff.hpp"
+
+
+static ultramodern::rsp::rsp_callbacks_t rsp_callbacks;
+
+void ultramodern::rsp::set_callbacks(const ultramodern::rsp::rsp_callbacks_t& callbacks) {
+    rsp_callbacks = callbacks;
+}
+
+
+uint8_t dmem[0x1000];
+uint16_t rspReciprocals[512];
+uint16_t rspInverseSquareRoots[512];
+
+// From Ares emulator. For license details, see rsp_vu.h
+void ultramodern::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);
+    }
+}
+
+RspUcodeFunc* ultramodern::rsp::get_microcode(uint32_t task_type, OSTask* task) {
+    assert(rsp_callbacks.get_rsp_microcode != nullptr);
+
+    return rsp_callbacks.get_rsp_microcode(task_type, task);
+}
+
+// Runs a recompiled RSP microcode
+void ultramodern::rsp::run_microcode(uint8_t* rdram, const OSTask* task, RspUcodeFunc* ucode_func) {
+    // Load the OSTask into DMEM
+    memcpy(&dmem[0xFC0], task, sizeof(OSTask));
+
+    assert(rsp_callbacks.dma_rdram_to_dmem != nullptr);
+
+    // Load the ucode data into DMEM
+    rsp_callbacks.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);
+}
+

ultramodern/src/user_callbacks.cpp

@@ -10,17 +10,6 @@ static bool s_callbacks_initialized = false;
 void ultramodern::register_user_callbacks(UserCallbacks& callbacks) {
     s_user_callbacks = callbacks;
 
-    if (s_user_callbacks.dma_rdram_to_dmem == nullptr) {
-        fprintf(stderr, "%s: `dma_rdram_to_dmem` is a required callback, it can't be `nullptr`\n", __func__);
-        assert(false);
-        std::quick_exit(EXIT_FAILURE);
-    }
-    if (s_user_callbacks.get_rsp_microcode == nullptr) {
-        fprintf(stderr, "%s: `get_rsp_microcode` is a required callback, it can't be `nullptr`\n", __func__);
-        assert(false);
-        std::quick_exit(EXIT_FAILURE);
-    }
-
     s_callbacks_initialized = true;
 }