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interp: Match actual vdiv prefix handling.

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Unknown W. Brackets committed 2019-03-30 12:26:09 -07:00
1 parent 921ecb4dec
commit c270bd2d85
1 file changed
+46 -33
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Core/MIPS/MIPSIntVFPU.cpp
+46 -33
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@@ -1756,51 +1756,64 @@ namespace MIPSInt
EatPrefixes();
}
void Int_VecDo3(MIPSOpcode op)
{
void Int_VecDo3(MIPSOpcode op) {
float s[4], t[4], d[4];
int vd = _VD;
int vs = _VS;
int vt = _VT;
VectorSize sz = GetVecSize(op);
float s[4];
float t[4];
float d[4];
int optype = 0;
switch (op >> 26) {
case 24: //VFPU0
switch ((op >> 23) & 7) {
case 0: optype = 0; break;
case 1: optype = 1; break;
case 7: optype = 7; break;
default: goto bad;
}
break;
case 25: //VFPU1
switch ((op >> 23) & 7) {
case 0: optype = 8; break;
default: goto bad;
}
break;
default:
bad:
_dbg_assert_msg_(CPU, 0, "Trying to interpret instruction that can't be interpreted");
break;
}
int n = GetNumVectorElements(sz);
ReadVector(s, sz, vs);
ApplySwizzleS(s, sz);
ReadVector(t, sz, vt);
ApplySwizzleT(t, sz);
for (int i = 0; i < GetNumVectorElements(sz); i++)
{
switch(op >> 26)
{
case 24: //VFPU0
switch ((op >> 23)&7)
{
case 0: d[i] = s[i] + t[i]; break; //vadd
case 1: d[i] = s[i] - t[i]; break; //vsub
case 7: d[i] = s[i] / t[i]; break; //vdiv
default: goto bad;
}
break;
case 25: //VFPU1
switch ((op >> 23)&7)
{
case 0: d[i] = s[i] * t[i]; break; //vmul
default: goto bad;
}
break;
default:
bad:
_dbg_assert_msg_(CPU,0,"Trying to interpret instruction that can't be interpreted");
break;
if (optype != 7) {
ApplySwizzleS(s, sz);
ApplySwizzleT(t, sz);
} else {
// The prefix handling of S/T is a bit odd, probably the HW doesn't do it in parallel.
// The X prefix is applied to the last element in sz.
ApplySwizzleS(&s[n - 1], V_Single);
ApplySwizzleT(&t[n - 1], V_Single);
}
for (int i = 0; i < n; i++) {
switch (optype) {
case 0: d[i] = s[i] + t[i]; break; //vadd
case 1: d[i] = s[i] - t[i]; break; //vsub
case 7: d[i] = s[i] / t[i]; break; //vdiv
case 8: d[i] = s[i] * t[i]; break; //vmul
}
}
ApplyPrefixD(d, sz);
// The D prefix (even mask) is ignored by vdiv only (vmul, etc. do apply it.)
if (optype != 7)
ApplyPrefixD(d, sz);
WriteVector(d, sz, vd);
PC += 4;
EatPrefixes();
}
void Int_CrossQuat(MIPSOpcode op)
{