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Merge pull request #3141 from Sonicadvance1/fix_simm9_range

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ConstProp: Fixes unscaled signed 9-bit range
This commit is contained in:
Mai authored and GitHub committed 2023-09-23 09:03:01 -04:00
2 parents da3e172857 1f2a3cfa8b
commit 72d092e951
1 file changed
+9 -2
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FEXCore/Source/Interface/IR/Passes/ConstProp.cpp
+9 -2
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@@ -64,8 +64,15 @@ static bool IsMemoryScale(uint64_t Scale, uint8_t AccessSize) {
return Scale == AccessSize;
}
static bool IsSIMM9Range(uint64_t imm) {
// AArch64 signed immediate unscaled 9-bit range.
// Used for both regular unscaled loadstore instructions
// and LRPCPC2 unscaled loadstore instructions.
return ((int64_t)imm >= -256) && ((int64_t)imm <= 255);
}
static bool IsImmMemory(uint64_t imm, uint8_t AccessSize) {
if ( ((int64_t)imm >= -255) && ((int64_t)imm <= 256) )
if (IsSIMM9Range(imm))
return true;
else if ( (imm & (AccessSize-1)) == 0 && imm/AccessSize <= 4095 )
return true;
@@ -76,7 +83,7 @@ static bool IsImmMemory(uint64_t imm, uint8_t AccessSize) {
static bool IsTSOImm9(uint64_t imm) {
// RCPC2 only has a 9-bit signed offset
if ( ((int64_t)imm >= -256) && ((int64_t)imm <= 255) )
if (IsSIMM9Range(imm))
return true;
else {
return false;