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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/log10f.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/log10f.rs')
-rw-r--r--vendor/libm-0.1.4/src/math/log10f.rs92
1 files changed, 0 insertions, 92 deletions
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
-}