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/log10f.rs | 92 ------------------------------------ 1 file changed, 92 deletions(-) delete mode 100644 vendor/libm-0.1.4/src/math/log10f.rs (limited to 'vendor/libm-0.1.4/src/math/log10f.rs') diff --git a/vendor/libm-0.1.4/src/math/log10f.rs b/vendor/libm-0.1.4/src/math/log10f.rs deleted file mode 100644 index 9845cda5d..000000000 --- a/vendor/libm-0.1.4/src/math/log10f.rs +++ /dev/null @@ -1,92 +0,0 @@ -/* origin: FreeBSD /usr/src/lib/msun/src/e_log10f.c */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ -/* - * See comments in log10.c. - */ - -use core::f32; - -const IVLN10HI: f32 = 4.3432617188e-01; /* 0x3ede6000 */ -const IVLN10LO: f32 = -3.1689971365e-05; /* 0xb804ead9 */ -const LOG10_2HI: f32 = 3.0102920532e-01; /* 0x3e9a2080 */ -const LOG10_2LO: f32 = 7.9034151668e-07; /* 0x355427db */ -/* |(log(1+s)-log(1-s))/s - Lg(s)| < 2**-34.24 (~[-4.95e-11, 4.97e-11]). */ -const LG1: f32 = 0.66666662693; /* 0xaaaaaa.0p-24 */ -const LG2: f32 = 0.40000972152; /* 0xccce13.0p-25 */ -const LG3: f32 = 0.28498786688; /* 0x91e9ee.0p-25 */ -const LG4: f32 = 0.24279078841; /* 0xf89e26.0p-26 */ - -#[inline] -#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] -pub fn log10f(mut x: f32) -> f32 { - let x1p25f = f32::from_bits(0x4c000000); // 0x1p25f === 2 ^ 25 - - let mut ui: u32 = x.to_bits(); - let hfsq: f32; - let f: f32; - let s: f32; - let z: f32; - let r: f32; - let w: f32; - let t1: f32; - let t2: f32; - let dk: f32; - let mut hi: f32; - let lo: f32; - let mut ix: u32; - let mut k: i32; - - ix = ui; - k = 0; - if ix < 0x00800000 || (ix >> 31) > 0 { - /* x < 2**-126 */ - if ix << 1 == 0 { - return -1. / (x * x); /* log(+-0)=-inf */ - } - if (ix >> 31) > 0 { - return (x - x) / 0.0; /* log(-#) = NaN */ - } - /* subnormal number, scale up x */ - k -= 25; - x *= x1p25f; - ui = x.to_bits(); - ix = ui; - } else if ix >= 0x7f800000 { - return x; - } else if ix == 0x3f800000 { - return 0.; - } - - /* reduce x into [sqrt(2)/2, sqrt(2)] */ - ix += 0x3f800000 - 0x3f3504f3; - k += (ix >> 23) as i32 - 0x7f; - ix = (ix & 0x007fffff) + 0x3f3504f3; - ui = ix; - x = f32::from_bits(ui); - - f = x - 1.0; - s = f / (2.0 + f); - z = s * s; - w = z * z; - t1 = w * (LG2 + w * LG4); - t2 = z * (LG1 + w * LG3); - r = t2 + t1; - hfsq = 0.5 * f * f; - - hi = f - hfsq; - ui = hi.to_bits(); - ui &= 0xfffff000; - hi = f32::from_bits(ui); - lo = f - hi - hfsq + s * (hfsq + r); - dk = k as f32; - dk * LOG10_2LO + (lo + hi) * IVLN10LO + lo * IVLN10HI + hi * IVLN10HI + dk * LOG10_2HI -} -- cgit v1.2.3