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Deduplication

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This commit is contained in:
offtkp 2025-06-08 21:48:19 +03:00
parent 9f24e47582
commit d19ce9b834
1 changed files with 9 additions and 28 deletions
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37
src/core/cpu_patches.cpp
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@ -386,11 +386,10 @@ static void GenerateINSERTQ(void* /* address */, const ZydisDecodedOperand* oper
}
}
static void ReplaceMOVNTSS(void* address, const ZydisDecodedOperand* operands,
Xbyak::CodeGenerator& c) {
static void ReplaceMOVNT(void* address, u8 rep_prefix) {
// Find the opcode byte
// There can be any amount of prefixes but the instruction can't be more than 15 bytes
// And we know for sure this is a MOVNTSS
// And we know for sure this is a MOVNTSS/MOVNTSD
bool found = false;
int index = 0;
u8* ptr = reinterpret_cast<u8*>(address);
@ -405,37 +404,19 @@ static void ReplaceMOVNTSS(void* address, const ZydisDecodedOperand* operands,
// Some sanity checks
ASSERT(found);
ASSERT(index >= 2);
ASSERT(ptr[index - 2] == 0xF3);
ASSERT(ptr[index - 2] == rep_prefix);
ASSERT(ptr[index - 1] == 0x0F);
// This turns the MOVNTSS to a MOVSS m32, xmm
// This turns the MOVNTSS/MOVNTSD to a MOVSS/MOVSD m, xmm
ptr[index] = 0x11;
}
static void ReplaceMOVNTSD(void* address, const ZydisDecodedOperand* operands,
Xbyak::CodeGenerator& c) {
// Find the opcode byte
// There can be any amount of prefixes but the instruction can't be more than 15 bytes
// And we know for sure this is a MOVNTSD
bool found = false;
int index = 0;
u8* ptr = reinterpret_cast<u8*>(address);
for (int i = 0; i < 15; i++) {
if (ptr[i] == 0x2B) {
index = i;
found = true;
break;
}
}
static void ReplaceMOVNTSS(void* address, const ZydisDecodedOperand*, Xbyak::CodeGenerator&) {
ReplaceMOVNT(address, 0xF3);
}
// Some sanity checks
ASSERT(found);
ASSERT(index >= 2);
ASSERT(ptr[index - 2] == 0xF2);
ASSERT(ptr[index - 1] == 0x0F);
// This turns the MOVNTSD to a MOVSD m64, xmm
ptr[index] = 0x11;
static void ReplaceMOVNTSD(void* address, const ZydisDecodedOperand*, Xbyak::CodeGenerator&) {
ReplaceMOVNT(address, 0xF2);
}
using PatchFilter = bool (*)(const ZydisDecodedOperand*);