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[a64] Implement `OPCODE_PACK`(D3DCOLOR)

This commit is contained in:
Wunkolo 2024-05-03 16:13:50 -07:00
parent 1b574be0e6
commit 72380bf833
1 changed files with 26 additions and 1 deletions
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27
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -774,7 +774,32 @@ struct PACK : Sequence<PACK, I<OPCODE_PACK, V128Op, V128Op, V128Op>> {
break;
}
}
static void EmitD3DCOLOR(A64Emitter& e, const EmitArgType& i) {}
static void EmitD3DCOLOR(A64Emitter& e, const EmitArgType& i) {
assert_true(i.src2.value->IsConstantZero());
QReg src = i.src1;
if (i.src1.is_constant) {
src = i.dest;
e.LoadConstantV(src, i.src1.constant());
}
// Saturate to [3,3....] so that only values between 3...[00] and 3...[FF]
// are valid - max before min to pack NaN as zero (5454082B is heavily
// affected by the order - packs 0xFFFFFFFF in matrix code to get a 0
// constant).
e.MOVP2R(X0, e.GetVConstPtr(V3333));
e.LDR(Q0, X0);
e.FMAX(i.dest.reg().S4(), i.dest.reg().S4(), Q0.S4());
e.MOVP2R(X0, e.GetVConstPtr(VPackD3DCOLORSat));
e.LDR(Q0, X0);
e.FMIN(i.dest.reg().S4(), src.S4(), Q0.S4());
// Extract bytes.
// RGBA (XYZW) -> ARGB (WXYZ)
// w = ((src1.uw & 0xFF) << 24) | ((src1.ux & 0xFF) << 16) |
// ((src1.uy & 0xFF) << 8) | (src1.uz & 0xFF)
e.MOVP2R(X0, e.GetVConstPtr(VPackD3DCOLOR));
e.LDR(Q0, X0);
e.TBL(i.dest.reg().B16(), List{i.dest.reg().B16()}, Q0.B16());
}
static void EmitFLOAT16_2(A64Emitter& e, const EmitArgType& i) {}
static void EmitFLOAT16_4(A64Emitter& e, const EmitArgType& i) {}
static void EmitSHORT_2(A64Emitter& e, const EmitArgType& i) {}