1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#![cfg(not(test))]
use libc::{c_double, c_float};
extern "C" {
pub fn acos(n: c_double) -> c_double;
pub fn asin(n: c_double) -> c_double;
pub fn atan(n: c_double) -> c_double;
pub fn atan2(a: c_double, b: c_double) -> c_double;
pub fn cbrt(n: c_double) -> c_double;
pub fn cbrtf(n: c_float) -> c_float;
pub fn cosh(n: c_double) -> c_double;
pub fn expm1(n: c_double) -> c_double;
pub fn expm1f(n: c_float) -> c_float;
pub fn fdim(a: c_double, b: c_double) -> c_double;
pub fn fdimf(a: c_float, b: c_float) -> c_float;
#[cfg_attr(target_env = "msvc", link_name = "_hypot")]
pub fn hypot(x: c_double, y: c_double) -> c_double;
#[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
pub fn hypotf(x: c_float, y: c_float) -> c_float;
pub fn log1p(n: c_double) -> c_double;
pub fn log1pf(n: c_float) -> c_float;
pub fn sinh(n: c_double) -> c_double;
pub fn tan(n: c_double) -> c_double;
pub fn tanh(n: c_double) -> c_double;
}
pub use self::shims::*;
#[cfg(not(all(target_env = "msvc", target_arch = "x86")))]
mod shims {
use libc::c_float;
extern "C" {
pub fn acosf(n: c_float) -> c_float;
pub fn asinf(n: c_float) -> c_float;
pub fn atan2f(a: c_float, b: c_float) -> c_float;
pub fn atanf(n: c_float) -> c_float;
pub fn coshf(n: c_float) -> c_float;
pub fn sinhf(n: c_float) -> c_float;
pub fn tanf(n: c_float) -> c_float;
pub fn tanhf(n: c_float) -> c_float;
}
}
// 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(all(target_env = "msvc", target_arch = "x86"))]
mod shims {
use libc::c_float;
#[inline]
pub unsafe fn acosf(n: c_float) -> c_float {
f64::acos(n as f64) as c_float
}
#[inline]
pub unsafe fn asinf(n: c_float) -> c_float {
f64::asin(n as f64) as c_float
}
#[inline]
pub unsafe fn atan2f(n: c_float, b: c_float) -> c_float {
f64::atan2(n as f64, b as f64) as c_float
}
#[inline]
pub unsafe fn atanf(n: c_float) -> c_float {
f64::atan(n as f64) as c_float
}
#[inline]
pub unsafe fn coshf(n: c_float) -> c_float {
f64::cosh(n as f64) as c_float
}
#[inline]
pub unsafe fn sinhf(n: c_float) -> c_float {
f64::sinh(n as f64) as c_float
}
#[inline]
pub unsafe fn tanf(n: c_float) -> c_float {
f64::tan(n as f64) as c_float
}
#[inline]
pub unsafe fn tanhf(n: c_float) -> c_float {
f64::tanh(n as f64) as c_float
}
}
|
