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/sin.rs | 86 --------------------------------------- 1 file changed, 86 deletions(-) delete mode 100644 vendor/libm-0.1.4/src/math/sin.rs (limited to 'vendor/libm-0.1.4/src/math/sin.rs') diff --git a/vendor/libm-0.1.4/src/math/sin.rs b/vendor/libm-0.1.4/src/math/sin.rs deleted file mode 100644 index 51aed88a8..000000000 --- a/vendor/libm-0.1.4/src/math/sin.rs +++ /dev/null @@ -1,86 +0,0 @@ -// origin: FreeBSD /usr/src/lib/msun/src/s_sin.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. -// ==================================================== - -use super::{k_cos, k_sin, rem_pio2}; - -// sin(x) -// Return sine function of x. -// -// kernel function: -// k_sin ... sine function on [-pi/4,pi/4] -// k_cos ... cose function on [-pi/4,pi/4] -// rem_pio2 ... argument reduction routine -// -// Method. -// Let S,C and T denote the sin, cos and tan respectively on -// [-PI/4, +PI/4]. Reduce the argument x to y1+y2 = x-k*pi/2 -// in [-pi/4 , +pi/4], and let n = k mod 4. -// We have -// -// n sin(x) cos(x) tan(x) -// ---------------------------------------------------------- -// 0 S C T -// 1 C -S -1/T -// 2 -S -C T -// 3 -C S -1/T -// ---------------------------------------------------------- -// -// Special cases: -// Let trig be any of sin, cos, or tan. -// trig(+-INF) is NaN, with signals; -// trig(NaN) is that NaN; -// -// Accuracy: -// TRIG(x) returns trig(x) nearly rounded -#[inline] -#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] -pub fn sin(x: f64) -> f64 { - let x1p120 = f64::from_bits(0x4770000000000000); // 0x1p120f === 2 ^ 120 - - /* High word of x. */ - let ix = (f64::to_bits(x) >> 32) as u32 & 0x7fffffff; - - /* |x| ~< pi/4 */ - if ix <= 0x3fe921fb { - if ix < 0x3e500000 { - /* |x| < 2**-26 */ - /* raise inexact if x != 0 and underflow if subnormal*/ - if ix < 0x00100000 { - force_eval!(x / x1p120); - } else { - force_eval!(x + x1p120); - } - return x; - } - return k_sin(x, 0.0, 0); - } - - /* sin(Inf or NaN) is NaN */ - if ix >= 0x7ff00000 { - return x - x; - } - - /* argument reduction needed */ - let (n, y0, y1) = rem_pio2(x); - match n & 3 { - 0 => k_sin(y0, y1, 1), - 1 => k_cos(y0, y1), - 2 => -k_sin(y0, y1, 1), - _ => -k_cos(y0, y1), - } -} - -#[test] -fn test_near_pi() { - let x = f64::from_bits(0x400921fb000FD5DD); // 3.141592026217707 - let sx = f64::from_bits(0x3ea50d15ced1a4a2); // 6.273720864039205e-7 - assert_eq!(sin(x), sx); -} -- cgit v1.2.3