1#![cfg(not(test))]
2
3// These symbols are all defined by `libm`,
4// or by `compiler-builtins` on unsupported platforms.
5extern "C" {
6 pub fn acos(n: f64) -> f64;
7 pub fn asin(n: f64) -> f64;
8 pub fn atan(n: f64) -> f64;
9 pub fn atan2(a: f64, b: f64) -> f64;
10 pub fn cbrt(n: f64) -> f64;
11 pub fn cbrtf(n: f32) -> f32;
12 pub fn cosh(n: f64) -> f64;
13 pub fn expm1(n: f64) -> f64;
14 pub fn expm1f(n: f32) -> f32;
15 pub fn fdim(a: f64, b: f64) -> f64;
16 pub fn fdimf(a: f32, b: f32) -> f32;
17 #[cfg_attr(target_env = "msvc", link_name = "_hypot")]
18 pub fn hypot(x: f64, y: f64) -> f64;
19 #[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
20 pub fn hypotf(x: f32, y: f32) -> f32;
21 pub fn log1p(n: f64) -> f64;
22 pub fn log1pf(n: f32) -> f32;
23 pub fn sinh(n: f64) -> f64;
24 pub fn tan(n: f64) -> f64;
25 pub fn tanh(n: f64) -> f64;
26 pub fn tgamma(n: f64) -> f64;
27 pub fn tgammaf(n: f32) -> f32;
28 pub fn lgamma_r(n: f64, s: &mut i32) -> f64;
29 pub fn lgammaf_r(n: f32, s: &mut i32) -> f32;
30
31 cfg_if::cfg_if! {
32 if #[cfg(not(all(target_os = "windows", target_env = "msvc", target_arch = "x86")))] {
33 pub fn acosf(n: f32) -> f32;
34 pub fn asinf(n: f32) -> f32;
35 pub fn atan2f(a: f32, b: f32) -> f32;
36 pub fn atanf(n: f32) -> f32;
37 pub fn coshf(n: f32) -> f32;
38 pub fn sinhf(n: f32) -> f32;
39 pub fn tanf(n: f32) -> f32;
40 pub fn tanhf(n: f32) -> f32;
41 }}
42}
43
44// On 32-bit x86 MSVC these functions aren't defined, so we just define shims
45// which promote everything to f64, perform the calculation, and then demote
46// back to f32. While not precisely correct should be "correct enough" for now.
47cfg_if::cfg_if! {
48if #[cfg(all(target_os = "windows", target_env = "msvc", target_arch = "x86"))] {
49 #[inline]
50 pub unsafe fn acosf(n: f32) -> f32 {
51 f64::acos(n as f64) as f32
52 }
53
54 #[inline]
55 pub unsafe fn asinf(n: f32) -> f32 {
56 f64::asin(n as f64) as f32
57 }
58
59 #[inline]
60 pub unsafe fn atan2f(n: f32, b: f32) -> f32 {
61 f64::atan2(n as f64, b as f64) as f32
62 }
63
64 #[inline]
65 pub unsafe fn atanf(n: f32) -> f32 {
66 f64::atan(n as f64) as f32
67 }
68
69 #[inline]
70 pub unsafe fn coshf(n: f32) -> f32 {
71 f64::cosh(n as f64) as f32
72 }
73
74 #[inline]
75 pub unsafe fn sinhf(n: f32) -> f32 {
76 f64::sinh(n as f64) as f32
77 }
78
79 #[inline]
80 pub unsafe fn tanf(n: f32) -> f32 {
81 f64::tan(n as f64) as f32
82 }
83
84 #[inline]
85 pub unsafe fn tanhf(n: f32) -> f32 {
86 f64::tanh(n as f64) as f32
87 }
88}}
89