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Add support for SwidenLow and UwidenLow for the X86_64 vcode backend

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Adds support using lowerings compatible with SSE4.1
This commit is contained in:
Johnnie Birch
2020-11-22 20:58:13 -08:00
parent 615a575da1
commit f9937575d6
1 changed files with 56 additions and 1 deletions
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57
cranelift/codegen/src/isa/x64/lower.rs
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@@ -2825,7 +2825,62 @@ fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
} }
} }
} }
Opcode::UwidenHigh | Opcode::UwidenLow | Opcode::SwidenHigh | Opcode::SwidenLow => {
let input_ty = ctx.input_ty(insn, 0);
let output_ty = ctx.output_ty(insn, 0);
let src = put_input_in_reg(ctx, inputs[0]);
let dst = get_output_reg(ctx, outputs[0]);
if output_ty.is_vector() {
match op {
Opcode::SwidenLow => match (input_ty, output_ty) {
(types::I8X16, types::I16X8) => {
ctx.emit(Inst::gen_move(dst, src, output_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Pmovsxbw, RegMem::from(dst), dst));
}
(types::I16X8, types::I32X4) => {
ctx.emit(Inst::gen_move(dst, src, output_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Pmovsxwd, RegMem::from(dst), dst));
}
_ => unreachable!(),
},
Opcode::SwidenHigh => match (input_ty, output_ty) {
(types::I8X16, types::I16X8) => {
unimplemented!("No lowering for {:?}", op);
}
(types::I16X8, types::I32X4) => {
unimplemented!("No lowering for {:?}", op);
}
_ => unreachable!(),
},
Opcode::UwidenLow => match (input_ty, output_ty) {
(types::I8X16, types::I16X8) => {
ctx.emit(Inst::gen_move(dst, src, output_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Pmovzxbw, RegMem::from(dst), dst));
}
(types::I16X8, types::I32X4) => {
ctx.emit(Inst::gen_move(dst, src, output_ty));
ctx.emit(Inst::xmm_rm_r(SseOpcode::Pmovzxwd, RegMem::from(dst), dst));
}
_ => unreachable!(),
},
Opcode::UwidenHigh => match (input_ty, output_ty) {
(types::I8X16, types::I16X8) => {
unimplemented!("No lowering for {:?}", op);
}
(types::I16X8, types::I32X4) => {
unimplemented!("No lowering for {:?}", op);
}
_ => unreachable!(),
},
_ => unreachable!(),
}
} else {
panic!("Unsupported non-vector type for widen instruction {:?}", ty);
}
}
Opcode::Snarrow | Opcode::Unarrow => {
unimplemented!("No lowering for {:?}", op);
}
Opcode::Bitcast => { Opcode::Bitcast => {
let input_ty = ctx.input_ty(insn, 0); let input_ty = ctx.input_ty(insn, 0);
let output_ty = ctx.output_ty(insn, 0); let output_ty = ctx.output_ty(insn, 0);