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PPU LLVM: Implement OE for few instructions

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This commit is contained in:
Elad Ashkenazi 2024-06-08 12:31:57 +03:00
parent 4e8e5a7fed
commit 929be0b4e6
2 changed files with 16 additions and 4 deletions
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2
rpcs3/Emu/Cell/PPUInterpreter.cpp
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@ -4230,7 +4230,7 @@ auto NEG()
const u64 RA = ppu.gpr[op.ra];
ppu.gpr[op.rd] = 0 - RA;
if constexpr (((Flags == has_oe) || ...))
ppu_ov_set(ppu, (~RA >> 63 == 0) && (~RA >> 63 != ppu.gpr[op.rd] >> 63));
ppu_ov_set(ppu, RA == (1ull << 63));
if constexpr (((Flags == has_rc) || ...))
ppu_cr_set<s64>(ppu, 0, ppu.gpr[op.rd], 0);
};

18
rpcs3/Emu/Cell/PPUTranslator.cpp
View file

@ -2657,7 +2657,13 @@ void PPUTranslator::ADDC(ppu_opcode_t op)
SetGpr(op.rd, result);
SetCarry(m_ir->CreateICmpULT(result, b));
if (op.rc) SetCrFieldSignedCmp(0, result, m_ir->getInt64(0));
if (op.oe) UNK(op);
if (op.oe)
{
//const auto s = m_ir->CreateCall(get_intrinsic<u64>(llvm::Intrinsic::sadd_with_overflow), {a, b});
//SetOverflow(m_ir->CreateExtractValue(s, {1}));
SetOverflow(m_ir->CreateICmpSLT(m_ir->CreateAnd(m_ir->CreateXor(a, m_ir->CreateNot(b)), m_ir->CreateXor(a, result)), m_ir->getInt64(0)));
}
}
void PPUTranslator::MULHDU(ppu_opcode_t op)
@ -2812,7 +2818,13 @@ void PPUTranslator::SUBF(ppu_opcode_t op)
const auto result = m_ir->CreateSub(b, a);
SetGpr(op.rd, result);
if (op.rc) SetCrFieldSignedCmp(0, result, m_ir->getInt64(0));
if (op.oe) UNK(op);
if (op.oe)
{
//const auto s = m_ir->CreateCall(get_intrinsic<u64>(llvm::Intrinsic::ssub_with_overflow), {b, m_ir->CreateNot(a)});
//SetOverflow(m_ir->CreateExtractValue(s, {1}));
SetOverflow(m_ir->CreateICmpSLT(m_ir->CreateAnd(m_ir->CreateXor(a, b), m_ir->CreateXor(m_ir->CreateNot(a), result)), m_ir->getInt64(0)));
}
}
void PPUTranslator::LDUX(ppu_opcode_t op)
@ -2914,7 +2926,7 @@ void PPUTranslator::NEG(ppu_opcode_t op)
const auto result = m_ir->CreateNeg(reg);
SetGpr(op.rd, result);
if (op.rc) SetCrFieldSignedCmp(0, result, m_ir->getInt64(0));
if (op.oe) UNK(op);
if (op.oe) SetOverflow(m_ir->CreateICmpEQ(result, m_ir->getInt64(1ull << 63)));
}
void PPUTranslator::LBZUX(ppu_opcode_t op)