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SPU LLVM: Add integer compare optimization for FCMGT

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This commit is contained in:
Malcolm Jestadt 2022-07-26 15:14:13 -04:00 committed by Ivan
parent 228844c017
commit 51e6d0a336
1 changed files with 33 additions and 1 deletions
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34
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -8641,12 +8641,44 @@ public:
const auto a = value<f32[4]>(ci->getOperand(0)); const auto a = value<f32[4]>(ci->getOperand(0));
const auto b = value<f32[4]>(ci->getOperand(1)); const auto b = value<f32[4]>(ci->getOperand(1));
const value_t<f32[4]> ab[2]{a, b};
std::bitset<2> safe_int_compare(0);
for (u32 i = 0; i < 2; i++)
{
if (auto [ok, data] = get_const_vector(ab[i].value, m_pos, __LINE__ + i); ok)
{
safe_int_compare.set(i);
for (u32 j = 0; j < 4; j++)
{
const u32 value = data._u32[j];
const u8 exponent = static_cast<u8>(value >> 23);
if ((value & 0x7fffffffu) >= 0x7f7fffffu || !exponent)
{
// See above
safe_int_compare.reset(i);
}
}
}
}
const auto ma = eval(fabs(a)); const auto ma = eval(fabs(a));
const auto mb = eval(fabs(b)); const auto mb = eval(fabs(b));
const auto mai = eval(bitcast<s32[4]>(ma));
const auto mbi = eval(bitcast<s32[4]>(mb));
if (safe_int_compare.any())
{
return eval(sext<s32[4]>(mai > mbi));
}
if (g_cfg.core.spu_approx_xfloat) if (g_cfg.core.spu_approx_xfloat)
{ {
return eval(sext<s32[4]>(fcmp_uno(ma > mb) & (bitcast<s32[4]>(ma) > bitcast<s32[4]>(mb)))); return eval(sext<s32[4]>(fcmp_uno(ma > mb) & (mai > mbi)));
} }
else else
{ {