mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
6565fcb6e1
2015-09-18 Wilco Dijkstra <wdijkstr@arm.com>
* resolv/base64.c (rcsid): Remove unused static.
* sysdeps/ieee754/dbl-64/atnat2.h (qpi1): Remove unused
static. (tqpi1): Likewise.
* sysdeps/ieee754/dbl-64/uexp.h (one): Likewise.
* sysdeps/ieee754/dbl-64/upow.h (sqrt_2): Likewise.
* sysdeps/ieee754/flt-32/e_log10f.c (one): Likewise.
* sysdeps/ieee754/flt-32/s_cosf.c (one): Likewise.
* sysdeps/ieee754/ldbl-128/e_lgammal_r.c (zero): Likewise.
* sysdeps/ieee754/ldbl-128/s_erfl.c (half): Likewise.
* sysdeps/ieee754/ldbl-128/s_log1pl.c (maxlog): Likewise.
* timezone/private.h (time_t_min): Likewise. (time_t_max):
Likewise.
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/* s_cosf.c -- float version of s_cos.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: s_cosf.c,v 1.4 1995/05/10 20:47:03 jtc Exp $";
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
#ifndef COSF
|
|
# define COSF_FUNC __cosf
|
|
#else
|
|
# define COSF_FUNC COSF
|
|
#endif
|
|
|
|
float COSF_FUNC(float x)
|
|
{
|
|
float y[2],z=0.0;
|
|
int32_t n,ix;
|
|
|
|
GET_FLOAT_WORD(ix,x);
|
|
|
|
/* |x| ~< pi/4 */
|
|
ix &= 0x7fffffff;
|
|
if(ix <= 0x3f490fd8) return __kernel_cosf(x,z);
|
|
|
|
/* cos(Inf or NaN) is NaN */
|
|
else if (ix>=0x7f800000) {
|
|
if (ix == 0x7f800000)
|
|
__set_errno (EDOM);
|
|
return x-x;
|
|
}
|
|
|
|
/* argument reduction needed */
|
|
else {
|
|
n = __ieee754_rem_pio2f(x,y);
|
|
switch(n&3) {
|
|
case 0: return __kernel_cosf(y[0],y[1]);
|
|
case 1: return -__kernel_sinf(y[0],y[1],1);
|
|
case 2: return -__kernel_cosf(y[0],y[1]);
|
|
default:
|
|
return __kernel_sinf(y[0],y[1],1);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef COSF
|
|
weak_alias (__cosf, cosf)
|
|
#endif
|