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[a64] Fix `PERMUTE_V128` out-of-index case

This commit is contained in:
Wunkolo 2024-05-10 17:29:56 -07:00
parent 3adb86ce58
commit 87cca91405
1 changed files with 17 additions and 10 deletions
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27
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -1139,26 +1139,33 @@ struct PERMUTE_V128
}
// Indices must be endian-swapped
e.MOVP2R(X0, e.GetVConstPtr(VSwapWordMask));
e.LDR(Q1, X0);
e.EOR(Q0.B16(), Q0.B16(), Q1.B16());
e.MOV(W0, 0b11);
e.DUP(Q1.B16(), W0);
e.EOR(indices.B16(), indices.B16(), Q1.B16());
// Modulo 32 the indices
e.MOV(W0, 0b0001'1111);
e.DUP(Q1.B16(), W0);
e.AND(indices.B16(), indices.B16(), Q1.B16());
// Table-registers must be sequential indices
const QReg table0 = Q2;
const QReg table_lo = Q2;
if (i.src2.is_constant) {
e.LoadConstantV(table0, i.src2.constant());
e.LoadConstantV(table_lo, i.src2.constant());
} else {
e.MOV(table0.B16(), i.src2.reg().B16());
e.MOV(table_lo.B16(), i.src2.reg().B16());
}
const QReg table1 = Q3;
const QReg table_hi = Q3;
if (i.src3.is_constant) {
e.LoadConstantV(table1, i.src3.constant());
e.LoadConstantV(table_hi, i.src3.constant());
} else {
e.MOV(table1.B16(), i.src3.reg().B16());
e.MOV(table_hi.B16(), i.src3.reg().B16());
}
e.TBL(i.dest.reg().B16(), List{table0.B16(), table1.B16()}, indices.B16());
e.TBL(i.dest.reg().B16(), List{table_lo.B16(), table_hi.B16()},
indices.B16());
}
static void EmitByInt16(A64Emitter& e, const EmitArgType& i) {}