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SPU LLVM: Improve FNMS

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Should be more accurate with postive/negative zero inputs according to docs while being more optimized.
TODO: Check SPU precise interptreter.
This commit is contained in:
Eladash
2020-04-03 16:27:08 +03:00
committed by Ivan
parent 158b24ec25
commit d451a0b7b7
1 changed files with 2 additions and 2 deletions
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rpcs3/Emu/Cell/SPURecompiler.cpp
+2 -2
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@@ -7465,9 +7465,9 @@ public:
{ {
// See FMA. // See FMA.
if (g_cfg.core.spu_accurate_xfloat) if (g_cfg.core.spu_accurate_xfloat)
set_vr(op.rt4, -fmuladd(get_vr<f64[4]>(op.ra), get_vr<f64[4]>(op.rb), eval(-get_vr<f64[4]>(op.rc)))); set_vr(op.rt4, fmuladd(eval(-get_vr<f64[4]>(op.ra)), get_vr<f64[4]>(op.rb), get_vr<f64[4]>(op.rc)));
else if (g_cfg.core.spu_approx_xfloat) else if (g_cfg.core.spu_approx_xfloat)
set_vr(op.rt4, -fma32x4(get_vr<f32[4]>(op.ra), get_vr<f32[4]>(op.rb), eval(-get_vr<f32[4]>(op.rc)))); set_vr(op.rt4, fma32x4(eval(-get_vr<f32[4]>(op.ra)), get_vr<f32[4]>(op.rb), get_vr<f32[4]>(op.rc)));
else else
set_vr(op.rt4, get_vr<f32[4]>(op.rc) - get_vr<f32[4]>(op.ra) * get_vr<f32[4]>(op.rb)); set_vr(op.rt4, get_vr<f32[4]>(op.rc) - get_vr<f32[4]>(op.ra) * get_vr<f32[4]>(op.rb));
} }