Emulation/ppsspp
1
0
Fork 0
mirror of https://github.com/hrydgard/ppsspp.git synced 2025-04-02 11:01:50 -04:00
Code Issues Projects Releases Packages Wiki Activity

interp: Handle vsgn prefixing.

Browse source 
One could compare against 3 using this, it just generates zeros to compare
with.
This commit is contained in:
Unknown W. Brackets 2019-02-24 15:24:39 -08:00
parent a5214d0b1a
commit 85ff32eed1
1 changed files with 11 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
Core/MIPS/MIPSIntVFPU.cpp
View file

@ -642,19 +642,24 @@ namespace MIPSInt
EatPrefixes();
}
void Int_Vsgn(MIPSOpcode op)
{
float s[4], d[4];
void Int_Vsgn(MIPSOpcode op) {
float s[4], t[4], d[4];
int vd = _VD;
int vs = _VS;
VectorSize sz = GetVecSize(op);
ReadVector(s, sz, vs);
ApplySwizzleS(s, sz);
for (int i = 0; i < GetNumVectorElements(sz); i++)
{
// Not sure who would do this, but using abs/neg allows a compare against 3 or -3.
u32 tprefixRemove = VFPU_ANY_SWIZZLE();
u32 tprefixAdd = VFPU_MAKE_CONSTANTS(VFPUConst::ZERO, VFPUConst::ZERO, VFPUConst::ZERO, VFPUConst::ZERO);
ApplyPrefixST(t, VFPURewritePrefix(VFPU_CTRL_TPREFIX, tprefixRemove, tprefixAdd), sz);
for (int i = 0; i < GetNumVectorElements(sz); i++) {
float diff = s[i] - t[i];
// To handle NaNs correctly, we do this with integer hackery
u32 val;
memcpy(&val, &s[i], sizeof(u32));
memcpy(&val, &diff, sizeof(u32));
if (val == 0 || val == 0x80000000)
d[i] = 0.0f;
else if ((val >> 31) == 0)