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[a64] Implement OPCODE_EXTRACT

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This commit is contained in:
Wunkolo 2024-05-03 15:49:14 -07:00
parent 39429aada7
commit b9571cfda0
1 changed files with 66 additions and 3 deletions
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69
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -575,15 +575,78 @@ EMITTER_OPCODE_TABLE(OPCODE_INSERT, INSERT_I8, INSERT_I16, INSERT_I32);
// This can be a single broadcast.
struct EXTRACT_I8
: Sequence<EXTRACT_I8, I<OPCODE_EXTRACT, I8Op, V128Op, I8Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {}
static void Emit(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.UMOV(i.dest, i.src1.reg().Belem()[VEC128_B(i.src2.constant())]);
} else {
// Fixup index
e.EOR(W0, i.src2, 0b11);
e.AND(W0, W0, 0x1F);
e.DUP(Q0.B16(), W0);
// Byte-table lookup
e.TBL(Q0.B16(), List{i.src1.reg().B16()}, Q0.B16());
// Get lowest element
e.UMOV(i.dest, Q0.Belem()[0]);
}
}
};
struct EXTRACT_I16
: Sequence<EXTRACT_I16, I<OPCODE_EXTRACT, I16Op, V128Op, I8Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {}
static void Emit(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.UMOV(i.dest, i.src1.reg().Helem()[VEC128_W(i.src2.constant())]);
} else {
// Fixup index
e.EOR(W0, i.src2, 0b01);
e.LSL(W0, W0, 1);
// Replicate index as byte
e.MOV(W1, 0x01'01);
e.MUL(W0, W0, W1);
// Byte indices
e.ADD(W0, W0, 0x01'00);
e.UXTH(W0, W0);
// Replicate byte indices
e.DUP(Q0.H8(), W0);
// Byte-table lookup
e.TBL(Q0.B16(), List{i.src1.reg().B16()}, Q0.B16());
// Get lowest element
e.UMOV(i.dest, Q0.Helem()[0]);
}
}
};
struct EXTRACT_I32
: Sequence<EXTRACT_I32, I<OPCODE_EXTRACT, I32Op, V128Op, I8Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {}
static void Emit(A64Emitter& e, const EmitArgType& i) {
static const vec128_t extract_table_32[4] = {
vec128b(3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b(7, 6, 5, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b(11, 10, 9, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b(15, 14, 13, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
};
if (i.src2.is_constant) {
e.UMOV(i.dest, i.src1.reg().Selem()[VEC128_D(i.src2.constant())]);
} else {
QReg src1 = i.src1.reg();
if (i.src1.is_constant) {
src1 = Q1;
e.LoadConstantV(src1, i.src1.constant());
}
e.AND(X0, i.src2.reg().toX(), 0b11);
e.LSL(X0, X0, 4);
e.MOVP2R(X1, extract_table_32);
e.LDR(Q0, X1, X0);
// Byte-table lookup
e.TBL(Q0.B16(), List{src1.B16()}, Q0.B16());
// Get lowest element
e.UMOV(i.dest, Q0.Selem()[0]);
}
}
};
EMITTER_OPCODE_TABLE(OPCODE_EXTRACT, EXTRACT_I8, EXTRACT_I16, EXTRACT_I32);