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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-07 05:48:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-07 05:48:48 +0000
commitef24de24a82fe681581cc130f342363c47c0969a (patch)
tree0d494f7e1a38b95c92426f58fe6eaa877303a86c /vendor/libm-0.1.4/src/math/asinh.rs
parentReleasing progress-linux version 1.74.1+dfsg1-1~progress7.99u1. (diff)
downloadrustc-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.rs39
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
- }
-}