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Add support for X86_64 SIMD narrow instructions for vcode backend

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Adds lowering support for:
i8x16.narrow_i16x8_s
i8x16.narrow_i16x8_u
i16x8.narrow_i32x4_s
i16x8.narrow_i32x4_u
This commit is contained in:
Johnnie Birch
2020-11-23 09:58:39 -08:00
parent 2cc501427e
commit ade9f12c72
1 changed files with 34 additions and 1 deletions
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35
cranelift/codegen/src/isa/x64/lower.rs
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@@ -2911,7 +2911,40 @@ fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
} }
} }
Opcode::Snarrow | Opcode::Unarrow => { Opcode::Snarrow | Opcode::Unarrow => {
unimplemented!("No lowering for {:?}", op); let input_ty = ctx.input_ty(insn, 0);
let output_ty = ctx.output_ty(insn, 0);
let src1 = put_input_in_reg(ctx, inputs[0]);
let src2 = put_input_in_reg(ctx, inputs[1]);
let dst = get_output_reg(ctx, outputs[0]);
if output_ty.is_vector() {
match op {
Opcode::Snarrow => match (input_ty, output_ty) {
(types::I16X8, types::I8X16) => {
ctx.emit(Inst::gen_move(dst, src1, input_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Packsswb, RegMem::reg(src2), dst));
}
(types::I32X4, types::I16X8) => {
ctx.emit(Inst::gen_move(dst, src1, input_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Packssdw, RegMem::reg(src2), dst));
}
_ => unreachable!(),
},
Opcode::Unarrow => match (input_ty, output_ty) {
(types::I16X8, types::I8X16) => {
ctx.emit(Inst::gen_move(dst, src1, input_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Packuswb, RegMem::reg(src2), dst));
}
(types::I32X4, types::I16X8) => {
ctx.emit(Inst::gen_move(dst, src1, input_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Packusdw, RegMem::reg(src2), dst));
}
_ => unreachable!(),
},
_ => unreachable!(),
}
} else {
panic!("Unsupported non-vector type for widen instruction {:?}", ty);
}
} }
Opcode::Bitcast => { Opcode::Bitcast => {
let input_ty = ctx.input_ty(insn, 0); let input_ty = ctx.input_ty(insn, 0);