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[CPU] vupkd3d: NaN on negative overflow and tests

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Triang3l
2018-06-11 21:31:30 +03:00
parent 03099bd6c0
commit c89cc6a229
4 changed files with 41 additions and 0 deletions
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10
src/xenia/cpu/backend/x64/x64_sequences.cc
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@@ -7426,6 +7426,9 @@ struct UNPACK : Sequence<UNPACK, I<OPCODE_UNPACK, V128Op, V128Op>> {
e.vpsrad(i.dest, 16);
// Add 3,3,0,1.
e.vpaddd(i.dest, e.GetXmmConstPtr(XMM3301));
// Return quiet NaNs in case of negative overflow.
e.vcmpeqps(e.xmm0, i.dest, e.GetXmmConstPtr(XMMUnpackSHORT_Overflow));
e.vblendvps(i.dest, i.dest, e.GetXmmConstPtr(XMMUnpackOverflowNaN), e.xmm0);
}
static void EmitSHORT_4(X64Emitter& e, const EmitArgType& i) {
// (VD.x) = 3.0 + (VB.x>>16)*2^-22
@@ -7452,6 +7455,9 @@ struct UNPACK : Sequence<UNPACK, I<OPCODE_UNPACK, V128Op, V128Op>> {
e.vpsrad(i.dest, 16);
// Add 3,3,3,3.
e.vpaddd(i.dest, e.GetXmmConstPtr(XMM3333));
// Return quiet NaNs in case of negative overflow.
e.vcmpeqps(e.xmm0, i.dest, e.GetXmmConstPtr(XMMUnpackSHORT_Overflow));
e.vblendvps(i.dest, i.dest, e.GetXmmConstPtr(XMMUnpackOverflowNaN), e.xmm0);
}
static void EmitUINT_2101010(X64Emitter& e, const EmitArgType& i) {
Xmm src;
@@ -7489,6 +7495,10 @@ struct UNPACK : Sequence<UNPACK, I<OPCODE_UNPACK, V128Op, V128Op>> {
e.vpsrad(i.dest, 22);
// Add 3,3,3,1.
e.vpaddd(i.dest, e.GetXmmConstPtr(XMM3331));
// Return quiet NaNs in case of negative overflow.
e.vcmpeqps(e.xmm0, i.dest,
e.GetXmmConstPtr(XMMUnpackUINT_2101010_Overflow));
e.vblendvps(i.dest, i.dest, e.GetXmmConstPtr(XMMUnpackOverflowNaN), e.xmm0);
// To convert XYZ to -1 to 1, games multiply by 0x46004020 & sub 0x46C06030.
// For W to 0 to 1, they multiply by and subtract 0x4A2AAAAB.
}