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Add alternative reciprocal pattern

This commit is contained in:
RipleyTom 2024-02-15 01:12:36 +01:00
parent f1399f65ce
commit 1578d938eb
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GPG Key ID: FC2B5DEF76BF4CC8
1 changed files with 22 additions and 1 deletions
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23
rpcs3/Emu/Cell/SPULLVMRecompiler.cpp
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@ -6018,7 +6018,7 @@ public:
// From ps3 hardware testing: Inf => NaN and NaN => Zero, Signed Zero => Zero
// This results in full accuracy within 1ulp(Currently x86 seems to be rounding up?)
const auto result_and = bitcast<u32[4]>(div_result) & 0x7fffffffu;
const auto result_and = bitcast<u32[4]>(div_result) & 0x7FFFFFFFu;
const auto result_cmp_inf = sext<s32[4]>(result_and == splat<u32[4]>(0x7F800000u));
const auto result_cmp_nan = sext<s32[4]>(result_and <= splat<u32[4]>(0x7F800000u));
@ -6113,6 +6113,27 @@ public:
if (check_accurate_reciprocal_pattern_for_float(std::bit_cast<f32>(std::bit_cast<u32>(1.0f) + 1)))
return;
// GOW 3(uses 1.0f * spu_re(div) instead of just spu_re(div) in the pattern)
auto check_alternative_reciprocal_pattern_for_float = [&](f32 float_value) -> bool
{
if (auto [ok_fm, div] = match_expr(c, fm(spu_re(MT), fsplat<f32[4]>(1.0f))); ok_fm)
{
if (auto [ok_fnms] = match_expr(a, fnms(c, div, fsplat<f32[4]>(1.0f))); ok_fnms)
{
if (auto [ok_spure] = match_expr(b, spu_re(div)); ok_spure)
{
erase_stores(a, b, c);
set_vr(op.rt4, re_accurate(div, fsplat<f32[4]>(float_value)));
return true;
}
}
}
return false;
};
if (check_alternative_reciprocal_pattern_for_float())
return;
// NFS Most Wanted doesn't like this
if (g_cfg.core.spu_xfloat_accuracy == xfloat_accuracy::relaxed)
{