mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* Compute sine and cosine of argument.
|
|
Copyright (C) 1997, 2001, 2005 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <math.h>
|
|
|
|
#include <math_private.h>
|
|
|
|
|
|
void
|
|
__sincos (double x, double *sinx, double *cosx)
|
|
{
|
|
int32_t ix;
|
|
|
|
/* High word of x. */
|
|
GET_HIGH_WORD (ix, x);
|
|
|
|
/* |x| ~< pi/4 */
|
|
ix &= 0x7fffffff;
|
|
if (ix>=0x7ff00000)
|
|
{
|
|
/* sin(Inf or NaN) is NaN */
|
|
*sinx = *cosx = x - x;
|
|
}
|
|
else
|
|
{
|
|
*sinx = __sin (x);
|
|
*cosx = __cos (x);
|
|
}
|
|
}
|
|
weak_alias (__sincos, sincos)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__sincos, __sincosl)
|
|
weak_alias (__sincos, sincosl)
|
|
#endif
|