From ef24de24a82fe681581cc130f342363c47c0969a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 7 Jun 2024 07:48:48 +0200 Subject: Merging upstream version 1.75.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/libm-0.1.4/src/math/asinh.rs | 39 ------------------------------------- 1 file changed, 39 deletions(-) delete mode 100644 vendor/libm-0.1.4/src/math/asinh.rs (limited to 'vendor/libm-0.1.4/src/math/asinh.rs') 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 - } -} -- cgit v1.2.3