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GS: Faster accurate_stq calculations

This commit is contained in:
TellowKrinkle 2020-11-19 21:36:00 -06:00 committed by refractionpcsx2
parent ee8d24a260
commit 2e1d147135
2 changed files with 35 additions and 21 deletions
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11
pcsx2/GS/GSVector4.h
View File

@ -205,6 +205,17 @@ public:
return m;
}
/// Makes Clang think that the whole vector is needed, preventing it from changing shuffles around because it thinks we don't need the whole vector
/// Useful for e.g. preventing clang from optimizing shuffles that remove possibly-denormal garbage data from vectors before computing with them
__forceinline GSVector4 noopt()
{
// Note: Clang is currently the only compiler that attempts to optimize vector intrinsics, if that changes in the future the implementation should be updated
#ifdef __clang__
__asm__("":"+x"(m)::);
#endif
return *this;
}
__forceinline uint32 rgba32() const
{
return GSVector4i(*this).rgba32();

45
pcsx2/GS/Renderers/Common/GSVertexTrace.cpp
View File

@ -202,9 +202,9 @@ void GSVertexTrace::FindMinMax(const void* vertex, const uint32* index, int coun
GSVector4 q = stq.wwww();
if (accurate_stq)
stq = (stq.xyww() / q).xyww(q);
stq = (stq.xyww() / q).noopt().xyww(q);
else
stq = (stq.xyww() * q.rcpnr()).xyww(q);
stq = (stq.xyww() * q.rcpnr()).noopt().xyww(q);
tmin = tmin.min(stq);
tmax = tmax.max(stq);
@ -256,19 +256,21 @@ void GSVertexTrace::FindMinMax(const void* vertex, const uint32* index, int coun
GSVector4 stq0 = GSVector4::cast(c0);
GSVector4 stq1 = GSVector4::cast(c1);
GSVector4 q = stq0.wwww(stq1);
if (accurate_stq)
{
GSVector4 q = stq0.wwww(stq1);
GSVector4 st = stq0.xyxy(stq1) / q;
stq0 = (stq0.xyww() / q.xxxx()).xyww(stq0);
stq1 = (stq1.xyww() / q.zzzz()).xyww(stq1);
stq0 = st.xyww(stq1);
stq1 = st.zwww(stq1);
}
else
{
GSVector4 q = stq0.wwww(stq1).rcpnr();
GSVector4 st = stq0.xyxy(stq1) * q.rcpnr();
stq0 = (stq0.xyww() * q.xxxx()).xyww(stq0);
stq1 = (stq1.xyww() * q.zzzz()).xyww(stq1);
stq0 = st.xyww(stq0);
stq1 = st.zwww(stq1);
}
tmin = tmin.min(stq0.min(stq1));
@ -331,19 +333,20 @@ void GSVertexTrace::FindMinMax(const void* vertex, const uint32* index, int coun
if (accurate_stq)
{
GSVector4 q = stq0.wwww(stq1).xzww(stq2);
GSVector4 st01 = stq0.xyxy(stq1) / stq0.wwww(stq1);
stq0 = (stq0.xyww() / q.xxxx()).xyww(stq0);
stq1 = (stq1.xyww() / q.yyyy()).xyww(stq1);
stq2 = (stq2.xyww() / q.zzzz()).xyww(stq2);
stq0 = st01.xyww(stq0);
stq1 = st01.zwww(stq1);
stq2 = (stq2.xyww() / stq2.wwww()).noopt().xyww(stq2);
}
else
{
GSVector4 q = stq0.wwww(stq1).xzww(stq2).rcpnr();
GSVector4 st01 = stq0.xyxy(stq1) * q.xxyy();
stq0 = (stq0.xyww() * q.xxxx()).xyww(stq0);
stq1 = (stq1.xyww() * q.yyyy()).xyww(stq1);
stq2 = (stq2.xyww() * q.zzzz()).xyww(stq2);
stq0 = st01.xyww(stq0);
stq1 = st01.zwww(stq1);
stq2 = (stq2.xyww() * q.zzzz()).noopt().xyww(stq2);
}
tmin = tmin.min(stq2).min(stq0.min(stq1));
@ -410,17 +413,17 @@ void GSVertexTrace::FindMinMax(const void* vertex, const uint32* index, int coun
if (accurate_stq)
{
GSVector4 q = stq1.wwww();
GSVector4 st = stq0.xyxy(stq1) / stq1.wwww();
stq0 = (stq0.xyww() / q).xyww(stq1);
stq1 = (stq1.xyww() / q).xyww(stq1);
stq0 = st.xyww(stq1);
stq1 = st.zwww(stq1);
}
else
{
GSVector4 q = stq1.wwww().rcpnr();
GSVector4 st = stq0.xyxy(stq1) * stq1.wwww().rcpnr();
stq0 = (stq0.xyww() * q).xyww(stq1);
stq1 = (stq1.xyww() * q).xyww(stq1);
stq0 = st.xyww(stq1);
stq1 = st.zwww(stq1);
}
tmin = tmin.min(stq0.min(stq1));