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Enable const evaluation for f16 and f128

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This excludes casting, which needs more tests.
This commit is contained in:
Trevor Gross 2024-06-13 08:11:16 -05:00
parent 921645c737
commit c906d2e428
2 changed files with 22 additions and 2 deletions
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10
compiler/rustc_const_eval/src/interpret/operator.rs
View File

@ -362,14 +362,18 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
let left = left.to_scalar();
let right = right.to_scalar();
Ok(match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F16 => {
self.binary_float_op(bin_op, layout, left.to_f16()?, right.to_f16()?)
}
FloatTy::F32 => {
self.binary_float_op(bin_op, layout, left.to_f32()?, right.to_f32()?)
}
FloatTy::F64 => {
self.binary_float_op(bin_op, layout, left.to_f64()?, right.to_f64()?)
}
FloatTy::F128 => unimplemented!("f16_f128"),
FloatTy::F128 => {
self.binary_float_op(bin_op, layout, left.to_f128()?, right.to_f128()?)
}
})
}
_ if left.layout.ty.is_integral() => {
@ -431,8 +435,10 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
let val = val.to_scalar();
// No NaN adjustment here, `-` is a bitwise operation!
let res = match (un_op, fty) {
(Neg, FloatTy::F16) => Scalar::from_f16(-val.to_f16()?),
(Neg, FloatTy::F32) => Scalar::from_f32(-val.to_f32()?),
(Neg, FloatTy::F64) => Scalar::from_f64(-val.to_f64()?),
(Neg, FloatTy::F128) => Scalar::from_f128(-val.to_f128()?),
_ => span_bug!(self.cur_span(), "Invalid float op {:?}", un_op),
};
Ok(ImmTy::from_scalar(res, layout))

14
compiler/rustc_middle/src/mir/interpret/value.rs
View File

@ -69,6 +69,13 @@ impl<Prov: Provenance> fmt::LowerHex for Scalar<Prov> {
}
}
impl<Prov> From<Half> for Scalar<Prov> {
#[inline(always)]
fn from(f: Half) -> Self {
Scalar::from_f16(f)
}
}
impl<Prov> From<Single> for Scalar<Prov> {
#[inline(always)]
fn from(f: Single) -> Self {
@ -83,6 +90,13 @@ impl<Prov> From<Double> for Scalar<Prov> {
}
}
impl<Prov> From<Quad> for Scalar<Prov> {
#[inline(always)]
fn from(f: Quad) -> Self {
Scalar::from_f128(f)
}
}
impl<Prov> From<ScalarInt> for Scalar<Prov> {
#[inline(always)]
fn from(ptr: ScalarInt) -> Self {