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machinst x64: adapt conversions for saturation behaviors;

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This commit is contained in:
Benjamin Bouvier
2020-07-22 16:46:12 +02:00
parent cd54f05efd
commit e43310a088
3 changed files with 223 additions and 119 deletions
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16
cranelift/codegen/src/isa/x64/lower.rs
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@@ -1016,7 +1016,7 @@ fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
};
}
Opcode::FcvtToUint | Opcode::FcvtToSint => {
Opcode::FcvtToUint | Opcode::FcvtToUintSat | Opcode::FcvtToSint | Opcode::FcvtToSintSat => {
let src = input_to_reg(ctx, inputs[0]);
let dst = output_to_reg(ctx, outputs[0]);
@@ -1036,23 +1036,23 @@ fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
OperandSize::Size64
};
let to_signed = op == Opcode::FcvtToSint;
let to_signed = op == Opcode::FcvtToSint || op == Opcode::FcvtToSintSat;
let is_sat = op == Opcode::FcvtToUintSat || op == Opcode::FcvtToSintSat;
let src_copy = ctx.alloc_tmp(RegClass::V128, input_ty);
ctx.emit(Inst::gen_move(src_copy, src, input_ty));
let tmp_xmm = ctx.alloc_tmp(RegClass::V128, input_ty);
let tmp_gpr = ctx.alloc_tmp(RegClass::I64, output_ty);
let srcloc = ctx.srcloc(insn);
if to_signed {
let tmp_xmm = ctx.alloc_tmp(RegClass::V128, input_ty);
let tmp_gpr = ctx.alloc_tmp(RegClass::I64, output_ty);
ctx.emit(Inst::cvt_float_to_sint_seq(
src_size, dst_size, src_copy, dst, tmp_xmm, tmp_gpr, srcloc,
src_size, dst_size, is_sat, src_copy, dst, tmp_gpr, tmp_xmm, srcloc,
));
} else {
let tmp_xmm = ctx.alloc_tmp(RegClass::V128, input_ty);
let tmp_gpr = ctx.alloc_tmp(RegClass::I64, output_ty);
ctx.emit(Inst::cvt_float_to_uint_seq(
src_size, dst_size, src_copy, dst, tmp_gpr, tmp_xmm, srcloc,
src_size, dst_size, is_sat, src_copy, dst, tmp_gpr, tmp_xmm, srcloc,
));
}
}