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PPU LLVM: Optimize vector denormal handling

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This commit is contained in:
yahfz
2026-07-15 02:19:53 -03:00
committed by Elad
parent 50df95d6c4
commit cdbc43712b
1 changed files with 10 additions and 1 deletions
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rpcs3/Emu/Cell/PPUTranslator.cpp
+10 -1
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@@ -466,7 +466,16 @@ Value* PPUTranslator::VecHandleDenormal(Value* val)
const auto type = val->getType(); const auto type = val->getType();
const auto value = bitcast(val, GetType<u32[4]>()); const auto value = bitcast(val, GetType<u32[4]>());
const auto mask = SExt(m_ir->CreateICmpEQ(m_ir->CreateAnd(value, Broadcast(RegLoad(m_jm_mask), 4)), ConstantAggregateZero::get(value->getType())), GetType<s32[4]>()); const auto is_zero_or_denormal = m_ir->CreateICmpEQ(m_ir->CreateAnd(value, Broadcast(RegLoad(m_jm_mask), 4)), ConstantAggregateZero::get(value->getType()));
if (m_use_avx512)
{
// AVX-512 lowers this to vptestnmd and a masked AND.
const auto signed_zero = m_ir->CreateAnd(value, Broadcast(m_ir->getInt32(0x8000'0000), 4));
return bitcast(m_ir->CreateSelect(is_zero_or_denormal, signed_zero, value), type);
}
const auto mask = SExt(is_zero_or_denormal, GetType<s32[4]>());
const auto nz = m_ir->CreateLShr(mask, 1); const auto nz = m_ir->CreateLShr(mask, 1);
const auto result = m_ir->CreateAnd(m_ir->CreateNot(nz), value); const auto result = m_ir->CreateAnd(m_ir->CreateNot(nz), value);