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Implement a better way to combat Clang's unsafe code reordering.

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This commit is contained in:
Skyth 2024-11-17 21:00:36 +03:00
parent a7c970d324
commit d8676283fd
2 changed files with 8 additions and 11 deletions
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3
PowerRecomp/recompiler.cpp
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@ -2265,9 +2265,6 @@ bool Recompiler::Recompile(const Function& fn)
{
println("loc_{:X}:", base);
// With a read barrier we prevent the compiler from doing unsafe code reordering. I wonder if we could do this better...
println("\t_ReadBarrier();");
// Anyone could jump to this label so we wouldn't know what the CSR state would be.
csrState = CSRState::Unknown;
}

16
PowerUtils/ppc_context.h
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@ -24,15 +24,15 @@
#define PPC_FUNC_PROLOGUE() __builtin_assume(((size_t)base & 0xFFFFFFFF) == 0)
#define PPC_LOAD_U8(x) *(uint8_t*)(base + (x))
#define PPC_LOAD_U16(x) __builtin_bswap16(*(uint16_t*)(base + (x)))
#define PPC_LOAD_U32(x) __builtin_bswap32(*(uint32_t*)(base + (x)))
#define PPC_LOAD_U64(x) __builtin_bswap64(*(uint64_t*)(base + (x)))
#define PPC_LOAD_U8(x) *(volatile uint8_t*)(base + (x))
#define PPC_LOAD_U16(x) __builtin_bswap16(*(volatile uint16_t*)(base + (x)))
#define PPC_LOAD_U32(x) __builtin_bswap32(*(volatile uint32_t*)(base + (x)))
#define PPC_LOAD_U64(x) __builtin_bswap64(*(volatile uint64_t*)(base + (x)))
#define PPC_STORE_U8(x, y) *(uint8_t*)(base + (x)) = (y)
#define PPC_STORE_U16(x, y) *(uint16_t*)(base + (x)) = __builtin_bswap16(y)
#define PPC_STORE_U32(x, y) *(uint32_t*)(base + (x)) = __builtin_bswap32(y)
#define PPC_STORE_U64(x, y) *(uint64_t*)(base + (x)) = __builtin_bswap64(y)
#define PPC_STORE_U8(x, y) *(volatile uint8_t*)(base + (x)) = (y)
#define PPC_STORE_U16(x, y) *(volatile uint16_t*)(base + (x)) = __builtin_bswap16(y)
#define PPC_STORE_U32(x, y) *(volatile uint32_t*)(base + (x)) = __builtin_bswap32(y)
#define PPC_STORE_U64(x, y) *(volatile uint64_t*)(base + (x)) = __builtin_bswap64(y)
#define PPC_CALL_FUNC(x) x(ctx, base)
#define PPC_CALL_INDIRECT_FUNC(x) (*(PPCFunc**)(ctx.fn + uint64_t(x) * 2))(ctx, base)