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aix: create shim for lgammaf_r

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Henry Jiang 2024-11-22 17:47:15 -05:00
parent a47555110c
commit c31a097d75
1 changed files with 9 additions and 1 deletions
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10
library/std/src/sys/cmath.rs
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@ -26,6 +26,7 @@ extern "C" {
pub fn tgamma(n: f64) -> f64;
pub fn tgammaf(n: f32) -> f32;
pub fn lgamma_r(n: f64, s: &mut i32) -> f64;
#[cfg(not(target_os = "aix"))]
pub fn lgammaf_r(n: f32, s: &mut i32) -> f32;
pub fn acosf128(n: f128) -> f128;
@ -56,13 +57,20 @@ extern "C" {
}}
}
// On AIX, we don't have lgammaf_r only the f64 version, so we can
// use the f64 version lgamma_r
#[cfg(target_os = "aix")]
pub unsafe fn lgammaf_r(n: f32, s: &mut i32) -> f32 {
lgamma_r(n.into(), s) as f32
}
// On 32-bit x86 MSVC these functions aren't defined, so we just define shims
// which promote everything to f64, perform the calculation, and then demote
// back to f32. While not precisely correct should be "correct enough" for now.
cfg_if::cfg_if! {
if #[cfg(all(target_os = "windows", target_env = "msvc", target_arch = "x86"))] {
#[inline]
pub unsafe fn acosf(n: f32) -> f32 {
pub unsafe fn acosf(n: f32) -> f32 {
f64::acos(n as f64) as f32
}