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/k_sin.rs | 58 ------------------------------------- 1 file changed, 58 deletions(-) delete mode 100644 vendor/libm-0.1.4/src/math/k_sin.rs (limited to 'vendor/libm-0.1.4/src/math/k_sin.rs') diff --git a/vendor/libm-0.1.4/src/math/k_sin.rs b/vendor/libm-0.1.4/src/math/k_sin.rs deleted file mode 100644 index 5d2bd68aa..000000000 --- a/vendor/libm-0.1.4/src/math/k_sin.rs +++ /dev/null @@ -1,58 +0,0 @@ -// origin: FreeBSD /usr/src/lib/msun/src/k_sin.c -// -// ==================================================== -// Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. -// -// Developed at SunSoft, a Sun Microsystems, Inc. business. -// Permission to use, copy, modify, and distribute this -// software is freely granted, provided that this notice -// is preserved. -// ==================================================== - -const S1: f64 = -1.66666666666666324348e-01; /* 0xBFC55555, 0x55555549 */ -const S2: f64 = 8.33333333332248946124e-03; /* 0x3F811111, 0x1110F8A6 */ -const S3: f64 = -1.98412698298579493134e-04; /* 0xBF2A01A0, 0x19C161D5 */ -const S4: f64 = 2.75573137070700676789e-06; /* 0x3EC71DE3, 0x57B1FE7D */ -const S5: f64 = -2.50507602534068634195e-08; /* 0xBE5AE5E6, 0x8A2B9CEB */ -const S6: f64 = 1.58969099521155010221e-10; /* 0x3DE5D93A, 0x5ACFD57C */ - -// kernel sin function on ~[-pi/4, pi/4] (except on -0), pi/4 ~ 0.7854 -// Input x is assumed to be bounded by ~pi/4 in magnitude. -// Input y is the tail of x. -// Input iy indicates whether y is 0. (if iy=0, y assume to be 0). -// -// Algorithm -// 1. Since sin(-x) = -sin(x), we need only to consider positive x. -// 2. Callers must return sin(-0) = -0 without calling here since our -// odd polynomial is not evaluated in a way that preserves -0. -// Callers may do the optimization sin(x) ~ x for tiny x. -// 3. sin(x) is approximated by a polynomial of degree 13 on -// [0,pi/4] -// 3 13 -// sin(x) ~ x + S1*x + ... + S6*x -// where -// -// |sin(x) 2 4 6 8 10 12 | -58 -// |----- - (1+S1*x +S2*x +S3*x +S4*x +S5*x +S6*x )| <= 2 -// | x | -// -// 4. sin(x+y) = sin(x) + sin'(x')*y -// ~ sin(x) + (1-x*x/2)*y -// For better accuracy, let -// 3 2 2 2 2 -// r = x *(S2+x *(S3+x *(S4+x *(S5+x *S6)))) -// then 3 2 -// sin(x) = x + (S1*x + (x *(r-y/2)+y)) -#[inline] -#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] -pub(crate) fn k_sin(x: f64, y: f64, iy: i32) -> f64 { - let z = x * x; - let w = z * z; - let r = S2 + z * (S3 + z * S4) + z * w * (S5 + z * S6); - let v = z * x; - if iy == 0 { - x + v * (S1 + z * r) - } else { - x - ((z * (0.5 * y - v * r) - y) - v * S1) - } -} -- cgit v1.2.3