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Add tests against MPFR for frexp and frexpf

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This implementation comes from `rug::Float::to_f32_exp` [1].

[1]: https://docs.rs/rug/1.26.1/rug/struct.Float.html#method.to_f32_exp
This commit is contained in:
Trevor Gross 2025-01-04 10:39:27 +00:00 • committed by Trevor Gross
parent 59964fbbca
commit e9bc33e8d3
2 changed files with 19 additions and 4 deletions
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19
library/compiler-builtins/libm/crates/libm-test/src/mpfloat.rs
View file

@ -258,6 +258,25 @@ macro_rules! impl_op_for_ty {
}
}
impl MpOp for crate::op::[<frexp $suffix>]::Routine {
type MpTy = MpFloat;
fn new_mp() -> Self::MpTy {
new_mpfloat::<Self::FTy>()
}
fn run(this: &mut Self::MpTy, input: Self::RustArgs) -> Self::RustRet {
// Implementation taken from `rug::Float::to_f32_exp`.
this.assign(input.0);
let exp = this.get_exp().unwrap_or(0);
if exp != 0 {
*this >>= exp;
}
(prep_retval::<Self::FTy>(this, Ordering::Equal), exp)
}
}
impl MpOp for crate::op::[<jn $suffix>]::Routine {
type MpTy = MpFloat;

4
library/compiler-builtins/libm/crates/libm-test/tests/multiprecision.rs
View file

@ -52,8 +52,6 @@ libm_macros::for_each_function! {
],
skip: [
// FIXME: MPFR tests needed
frexp,
frexpf,
ilogb,
ilogbf,
ldexp,
@ -159,8 +157,6 @@ libm_macros::for_each_function! {
ynf,
// FIXME: MPFR tests needed
frexp,
frexpf,
ilogb,
ilogbf,
],