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PPCRec: Fix SRAW instruction

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This commit is contained in:
Exzap 2025-05-06 20:28:54 +02:00
parent 2692e158c3
commit 5fd0d9b4ed
1 changed files with 6 additions and 4 deletions
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10
src/Cafe/HW/Espresso/Recompiler/PPCRecompilerImlGen.cpp
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@ -1125,15 +1125,15 @@ bool PPCRecompilerImlGen_SRAW(ppcImlGenContext_t* ppcImlGenContext, uint32 opcod
// load masked shift factor into temporary register // load masked shift factor into temporary register
ppcImlGenContext->emitInst().make_r_r_s32(PPCREC_IML_OP_AND, regTmpShiftAmount, regB, 0x3F); ppcImlGenContext->emitInst().make_r_r_s32(PPCREC_IML_OP_AND, regTmpShiftAmount, regB, 0x3F);
ppcImlGenContext->emitInst().make_compare_s32(regTmpShiftAmount, 32, regTmpCondBool, IMLCondition::UNSIGNED_GT); ppcImlGenContext->emitInst().make_compare_s32(regTmpShiftAmount, 31, regTmpCondBool, IMLCondition::UNSIGNED_GT);
ppcImlGenContext->emitInst().make_conditional_jump(regTmpCondBool, true); ppcImlGenContext->emitInst().make_conditional_jump(regTmpCondBool, true);
PPCIMLGen_CreateSegmentBranchedPath(*ppcImlGenContext, *ppcImlGenContext->currentBasicBlock, PPCIMLGen_CreateSegmentBranchedPath(*ppcImlGenContext, *ppcImlGenContext->currentBasicBlock,
[&](ppcImlGenContext_t& genCtx) [&](ppcImlGenContext_t& genCtx)
{ {
/* branch taken */ /* branch taken, shift size 32 or above */
genCtx.emitInst().make_r_r_r(PPCREC_IML_OP_RIGHT_SHIFT_S, regA, regS, regTmpShiftAmount); genCtx.emitInst().make_r_r_s32(PPCREC_IML_OP_RIGHT_SHIFT_S, regA, regS, 31); // shift the sign bit into all the bits
genCtx.emitInst().make_compare_s32(regA, 0, regCarry, IMLCondition::NEQ); // if the sign bit is still set it also means it was shifted out and we can set carry genCtx.emitInst().make_compare_s32(regA, 0, regCarry, IMLCondition::NEQ);
}, },
[&](ppcImlGenContext_t& genCtx) [&](ppcImlGenContext_t& genCtx)
{ {
@ -1148,6 +1148,8 @@ bool PPCRecompilerImlGen_SRAW(ppcImlGenContext_t* ppcImlGenContext, uint32 opcod
genCtx.emitInst().make_r_r_r(PPCREC_IML_OP_RIGHT_SHIFT_S, regA, regS, regTmpShiftAmount); genCtx.emitInst().make_r_r_r(PPCREC_IML_OP_RIGHT_SHIFT_S, regA, regS, regTmpShiftAmount);
} }
); );
if (opcode & PPC_OPC_RC)
PPCImlGen_UpdateCR0(ppcImlGenContext, regA);
return true; return true;
} }