mirror of
https://github.com/c3lang/c3c.git
synced 2026-02-27 12:01:16 +00:00
5020caa9c3
* C3_MATH feature This feature allows the usage of noclib math files even when libc is in use. If a nolibc symbol exists, it will be used in place of libc, otherwise it will default to libc. * Added MIT License notices to atan.c3
33 lines
1.2 KiB
Plaintext
33 lines
1.2 KiB
Plaintext
module std::math::nolibc @if(env::NO_LIBC || $feature(C3_MATH));
|
|
|
|
/* origin: FreeBSD /usr/src/lib/msun/src/k_cosf.c */
|
|
/*
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
* Debugged and optimized by Bruce D. Evans.
|
|
*/
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
|
|
|
|
const double C0 @private = -0x1ffffffd0c5e81.0p-54; /* -0.499999997251031003120 */
|
|
const double C1 @private = 0x155553e1053a42.0p-57; /* 0.0416666233237390631894 */
|
|
const double C2 @private = -0x16c087e80f1e27.0p-62; /* -0.00138867637746099294692 */
|
|
const double C3 @private = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
|
|
|
|
fn float __cosdf(double x) @extern("__cosdf") @weak @nostrip
|
|
{
|
|
/* Try to optimize for parallel evaluation as in __tandf.c. */
|
|
double z = x * x;
|
|
double w = z * z;
|
|
double r = C2 + z * C3;
|
|
return (float)(((1.0f + z * C0) + w * C1) + (w * z) * r);
|
|
}
|