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Implement I16x8Q15MulrSatS in compiler LLVM

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This commit is contained in:
Mark McCaskey
2021-05-11 14:37:59 -07:00
parent da86e69a45
commit 20297858ed
3 changed files with 55 additions and 1 deletions
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52
lib/compiler-llvm/src/translator/code.rs
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@ -2834,6 +2834,58 @@ impl<'ctx, 'a> LLVMFunctionCodeGenerator<'ctx, 'a> {
let res = self.builder.build_bitcast(res, self.intrinsics.i128_ty, "");
self.state.push1(res);
}
Operator::I16x8Q15MulrSatS => {
let ((v1, i1), (v2, i2)) = self.state.pop2_extra()?;
let (v1, _) = self.v128_into_i16x8(v1, i1);
let (v2, _) = self.v128_into_i16x8(v2, i2);
let max_value = self
.intrinsics
.i16_ty
.const_int(i16::max_value() as u64, false);
let max_values = VectorType::const_vector(&[max_value; 8]);
let v1 = self
.builder
.build_int_s_extend(v1, self.intrinsics.i32x8_ty, "");
let v2 = self
.builder
.build_int_s_extend(v2, self.intrinsics.i32x8_ty, "");
let res = self.builder.build_int_mul(v1, v2, "");
// magic number specified by the spec
let bit = self.intrinsics.i32_ty.const_int(0x4000, false);
let bits = VectorType::const_vector(&[bit; 8]);
let res = self.builder.build_int_add(res, bits, "");
let fifteen = self.intrinsics.i32_ty.const_int(15, false);
let fifteens = VectorType::const_vector(&[fifteen; 8]);
let res = self.builder.build_right_shift(res, fifteens, true, "");
let saturate_up = {
let max_values =
self.builder
.build_int_s_extend(max_values, self.intrinsics.i32x8_ty, "");
let saturate_up =
self.builder
.build_int_compare(IntPredicate::SGT, res, max_values, "");
saturate_up
};
let res = self
.builder
.build_int_truncate(res, self.intrinsics.i16x8_ty, "");
let res = self
.builder
.build_select(saturate_up, max_values, res, "")
.into_vector_value();
let res = self.builder.build_bitcast(res, self.intrinsics.i128_ty, "");
self.state.push1(res);
}
o @ Operator::I16x8ExtMulLowI8x16S
| o @ Operator::I16x8ExtMulLowI8x16U
| o @ Operator::I16x8ExtMulHighI8x16S