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interp: Correct prefixes for vsbn/vsbz.

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unknownbrackets committed Mar 16, 2019
1 parent 175ceef commit f2be0cb0836081e44eab3e245c728bb8d5c9add4
Showing with 29 additions and 32 deletions.
  1. +29 −32 Core/MIPS/MIPSIntVFPU.cpp
@@ -2000,64 +2000,61 @@ namespace MIPSInt
EatPrefixes();
}

void Int_Vsbn(MIPSOpcode op)
{
void Int_Vsbn(MIPSOpcode op) {
FloatBits d, s, t;
int vd = _VD;
int vs = _VS;
int vt = _VT;
VectorSize sz = GetVecSize(op);

FloatBits d;
FloatBits s;
u8 exp = (u8)(127 + VI(vt));

ReadVector(s.f, sz, vs);
// TODO: Test swizzle, t?
ApplySwizzleS(s.f, sz);
ReadVector(t.f, sz, vs);
ApplySwizzleT(t.f, sz);
// Swizzle does apply to the value read as an integer.
u8 exp = (u8)(127 + t.i[0]);

if (sz != V_Single) {
ERROR_LOG_REPORT(CPU, "vsbn not implemented for size %d", GetNumVectorElements(sz));
// Simply replace the exponent bits.
u32 prev = s.u[0] & 0x7F800000;
if (prev != 0 && prev != 0x7F800000) {
d.u[0] = (s.u[0] & ~0x7F800000) | (exp << 23);
} else {
d.u[0] = s.u[0];
}
for (int i = 0; i < GetNumVectorElements(sz); ++i) {
// Simply replace the exponent bits.
u32 prev = s.u[i] & 0x7F800000;
if (prev != 0 && prev != 0x7F800000) {
d.u[i] = (s.u[i] & ~0x7F800000) | (exp << 23);
} else {
d.u[i] = s.u[i];
}

// If sz is greater than V_Single, the rest are unchanged.
for (int i = 1; i < GetNumVectorElements(sz); ++i) {
d.u[i] = s.u[i];
}

ApplyPrefixD(d.f, sz);
WriteVector(d.f, sz, vd);
PC += 4;
EatPrefixes();
}

void Int_Vsbz(MIPSOpcode op)
{
void Int_Vsbz(MIPSOpcode op) {
// Vector scale by zero (set exp to 0 to extract mantissa)
FloatBits d, s;
int vd = _VD;
int vs = _VS;
VectorSize sz = GetVecSize(op);

FloatBits d;
FloatBits s;

ReadVector(s.f, sz, vs);
// TODO: Test swizzle, t?
ApplySwizzleS(s.f, sz);

if (sz != V_Single) {
ERROR_LOG_REPORT(CPU, "vsbz not implemented for size %d", GetNumVectorElements(sz));
// NAN and denormals pass through.
if (my_isnan(s.f[0]) || (s.u[0] & 0x7F800000) == 0) {
d.u[0] = s.u[0];
} else {
d.u[0] = (127 << 23) | (s.u[0] & 0x007FFFFF);
}
for (int i = 0; i < GetNumVectorElements(sz); ++i) {
// NAN and denormals pass through.
if (my_isnan(s.f[i]) || (s.u[i] & 0x7F800000) == 0) {
d.u[i] = s.u[i];
} else {
d.u[i] = (127 << 23) | (s.u[i] & 0x007FFFFF);
}

// If sz is greater than V_Single, the rest are unchanged.
for (int i = 1; i < GetNumVectorElements(sz); ++i) {
d.u[i] = s.u[i];
}

ApplyPrefixD(d.f, sz);
WriteVector(d.f, sz, vd);
PC += 4;

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