diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
commit | ef24de24a82fe681581cc130f342363c47c0969a (patch) | |
tree | 0d494f7e1a38b95c92426f58fe6eaa877303a86c /vendor/libm-0.1.4/src/math/asinh.rs | |
parent | Releasing progress-linux version 1.74.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-ef24de24a82fe681581cc130f342363c47c0969a.tar.xz rustc-ef24de24a82fe681581cc130f342363c47c0969a.zip |
Merging upstream version 1.75.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/libm-0.1.4/src/math/asinh.rs')
-rw-r--r-- | vendor/libm-0.1.4/src/math/asinh.rs | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/vendor/libm-0.1.4/src/math/asinh.rs b/vendor/libm-0.1.4/src/math/asinh.rs deleted file mode 100644 index 14295357a..000000000 --- a/vendor/libm-0.1.4/src/math/asinh.rs +++ /dev/null @@ -1,39 +0,0 @@ -use super::{log, log1p, sqrt}; - -const LN2: f64 = 0.693147180559945309417232121458176568; /* 0x3fe62e42, 0xfefa39ef*/ - -/* asinh(x) = sign(x)*log(|x|+sqrt(x*x+1)) ~= x - x^3/6 + o(x^5) */ -/// Inverse hyperbolic sine (f64) -/// -/// Calculates the inverse hyperbolic sine of `x`. -/// Is defined as `sgn(x)*log(|x|+sqrt(x*x+1))`. -pub fn asinh(mut x: f64) -> f64 { - let mut u = x.to_bits(); - let e = ((u >> 52) as usize) & 0x7ff; - let sign = (u >> 63) != 0; - - /* |x| */ - u &= (!0) >> 1; - x = f64::from_bits(u); - - if e >= 0x3ff + 26 { - /* |x| >= 0x1p26 or inf or nan */ - x = log(x) + LN2; - } else if e >= 0x3ff + 1 { - /* |x| >= 2 */ - x = log(2.0 * x + 1.0 / (sqrt(x * x + 1.0) + x)); - } else if e >= 0x3ff - 26 { - /* |x| >= 0x1p-26, up to 1.6ulp error in [0.125,0.5] */ - x = log1p(x + x * x / (sqrt(x * x + 1.0) + 1.0)); - } else { - /* |x| < 0x1p-26, raise inexact if x != 0 */ - let x1p120 = f64::from_bits(0x4770000000000000); - force_eval!(x + x1p120); - } - - if sign { - -x - } else { - x - } -} |