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SPU LLVM: Add optimized path for spu_re_acc special cases

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- Uses vfixupimmps (AVX-512), 5 instructions down to 1
This commit is contained in:
Malcolm Jestadt 2024-10-03 17:21:58 -04:00 committed by Elad
parent 4832267307
commit 8ca60df1ab
2 changed files with 34 additions and 3 deletions
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16
rpcs3/Emu/CPU/CPUTranslator.h
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@ -3729,6 +3729,22 @@ public:
return result;
}
template <typename T1, typename T2, typename T3>
value_t<f32[4]> vfixupimmps(T1 a, T2 b, T3 c, u8 d, u8 e)
{
value_t<f32[4]> result;
const auto data0 = a.eval(m_ir);
const auto data1 = b.eval(m_ir);
const auto data2 = c.eval(m_ir);
const auto immediate = (llvm_const_int<u32>{d});
const auto imm32 = immediate.eval(m_ir);
const auto immediate2 = (llvm_const_int<u8>{e});
const auto imm8 = immediate2.eval(m_ir);
result.value = m_ir->CreateCall(get_intrinsic(llvm::Intrinsic::x86_avx512_mask_fixupimm_ps_128), {data0, data1, data2, imm32, imm8});\
return result;
}
llvm::Value* load_const(llvm::GlobalVariable* g, llvm::Value* i, llvm::Type* type = nullptr)
{
return m_ir->CreateLoad(type ? type : g->getValueType(), m_ir->CreateGEP(g->getValueType(), g, {m_ir->getInt64(0), m_ir->CreateZExtOrTrunc(i, get_type<u64>())}));

17
rpcs3/Emu/Cell/SPULLVMRecompiler.cpp
View File

@ -6704,6 +6704,20 @@ public:
}
});
if (m_use_avx512)
{
register_intrinsic("spu_re_acc", [&](llvm::CallInst* ci)
{
const auto div = value<f32[4]>(ci->getOperand(0));
const auto the_one = value<f32[4]>(ci->getOperand(1));
const auto div_result = the_one / div;
return vfixupimmps(div_result, div_result, splat<u32[4]>(0x00330088u), 0, 0xff);
});
}
else
{
register_intrinsic("spu_re_acc", [&](llvm::CallInst* ci)
{
const auto div = value<f32[4]>(ci->getOperand(0));
@ -6718,9 +6732,10 @@ public:
const auto and_mask = bitcast<u32[4]>(result_cmp_nan) & splat<u32[4]>(0xFFFFFFFFu);
const auto or_mask = bitcast<u32[4]>(result_cmp_inf) & splat<u32[4]>(0xFFFFFFFu);
return bitcast<f32[4]>((bitcast<u32[4]>(div_result) & and_mask) | or_mask);
});
}
const auto [a, b, c] = get_vrs<f32[4]>(op.ra, op.rb, op.rc);
static const auto MT = match<f32[4]>();