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89 lines
2.5 KiB
Rust
89 lines
2.5 KiB
Rust
#![cfg(not(test))]
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// These symbols are all defined by `libm`,
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// or by `compiler-builtins` on unsupported platforms.
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extern "C" {
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pub fn acos(n: f64) -> f64;
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pub fn asin(n: f64) -> f64;
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pub fn atan(n: f64) -> f64;
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pub fn atan2(a: f64, b: f64) -> f64;
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pub fn cbrt(n: f64) -> f64;
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pub fn cbrtf(n: f32) -> f32;
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pub fn cosh(n: f64) -> f64;
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pub fn expm1(n: f64) -> f64;
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pub fn expm1f(n: f32) -> f32;
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pub fn fdim(a: f64, b: f64) -> f64;
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pub fn fdimf(a: f32, b: f32) -> f32;
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#[cfg_attr(target_env = "msvc", link_name = "_hypot")]
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pub fn hypot(x: f64, y: f64) -> f64;
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#[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
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pub fn hypotf(x: f32, y: f32) -> f32;
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pub fn log1p(n: f64) -> f64;
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pub fn log1pf(n: f32) -> f32;
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pub fn sinh(n: f64) -> f64;
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pub fn tan(n: f64) -> f64;
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pub fn tanh(n: f64) -> f64;
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pub fn tgamma(n: f64) -> f64;
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pub fn tgammaf(n: f32) -> f32;
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pub fn lgamma_r(n: f64, s: &mut i32) -> f64;
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pub fn lgammaf_r(n: f32, s: &mut i32) -> f32;
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cfg_if::cfg_if! {
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if #[cfg(not(all(target_os = "windows", target_env = "msvc", target_arch = "x86")))] {
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pub fn acosf(n: f32) -> f32;
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pub fn asinf(n: f32) -> f32;
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pub fn atan2f(a: f32, b: f32) -> f32;
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pub fn atanf(n: f32) -> f32;
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pub fn coshf(n: f32) -> f32;
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pub fn sinhf(n: f32) -> f32;
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pub fn tanf(n: f32) -> f32;
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pub fn tanhf(n: f32) -> f32;
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}}
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}
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// On 32-bit x86 MSVC these functions aren't defined, so we just define shims
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// which promote everything to f64, perform the calculation, and then demote
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// back to f32. While not precisely correct should be "correct enough" for now.
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cfg_if::cfg_if! {
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if #[cfg(all(target_os = "windows", target_env = "msvc", target_arch = "x86"))] {
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#[inline]
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pub unsafe fn acosf(n: f32) -> f32 {
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f64::acos(n as f64) as f32
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}
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#[inline]
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pub unsafe fn asinf(n: f32) -> f32 {
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f64::asin(n as f64) as f32
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}
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#[inline]
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pub unsafe fn atan2f(n: f32, b: f32) -> f32 {
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f64::atan2(n as f64, b as f64) as f32
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}
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#[inline]
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pub unsafe fn atanf(n: f32) -> f32 {
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f64::atan(n as f64) as f32
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}
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#[inline]
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pub unsafe fn coshf(n: f32) -> f32 {
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f64::cosh(n as f64) as f32
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}
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#[inline]
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pub unsafe fn sinhf(n: f32) -> f32 {
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f64::sinh(n as f64) as f32
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}
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#[inline]
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pub unsafe fn tanf(n: f32) -> f32 {
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f64::tan(n as f64) as f32
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}
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#[inline]
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pub unsafe fn tanhf(n: f32) -> f32 {
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f64::tanh(n as f64) as f32
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}
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}}
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