mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-28 04:44:38 +08:00
0d16618c58
Fri May 28 22:20:03 1999 Anthony Green <green@cygnus.com> * java/lang/fdlibm.h: Don't use __uint32_t. Include mprec.h. * java/lang/e_log.c: Don't use __uint32_t. 1999-05-27 Eric Christopher <echristo@cygnus.com> * configure: Rebuilt * configure.in: Fixed ISO C9X and namespace collision with __uint32_t * acconfig.h: Rebuilt * include/config.h.in: Rebuilt * java/lang/mprec.h, java/lang/e_acos.c, java/lang/e_asin.c, java/lang/e_atan2.c, java/lang/e_exp.c, java/lang/e_fmod.c, e_log.c, java/lang/e_pow.c, java/lang/e_rem_pio2.c, java/lang/e_remainder.c, java/lang/e_sqrt.c, java/lang/fdlibm.h, k_tan.c, java/lang/mprec.h, java/lang/s_atan.c, java/lang/s_ceil.c, java/lang/s_copysign.c, java/lang/s_fabs.c, s_floor.c, java/lang/s_rint.c, java/lang/sf_rint.c: Fixed ISO C9X and namespace collision with __uint32_t From-SVN: r27729
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
|
|
/* @(#)s_copysign.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<copysign>>, <<copysignf>>---sign of <[y]>, magnitude of <[x]>
|
|
|
|
INDEX
|
|
copysign
|
|
INDEX
|
|
copysignf
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <math.h>
|
|
double copysign (double <[x]>, double <[y]>);
|
|
float copysignf (float <[x]>, float <[y]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <math.h>
|
|
double copysign (<[x]>, <[y]>)
|
|
double <[x]>;
|
|
double <[y]>;
|
|
|
|
float copysignf (<[x]>, <[y]>)
|
|
float <[x]>;
|
|
float <[y]>;
|
|
|
|
DESCRIPTION
|
|
<<copysign>> constructs a number with the magnitude (absolute value)
|
|
of its first argument, <[x]>, and the sign of its second argument,
|
|
<[y]>.
|
|
|
|
<<copysignf>> does the same thing; the two functions differ only in
|
|
the type of their arguments and result.
|
|
|
|
RETURNS
|
|
<<copysign>> returns a <<double>> with the magnitude of
|
|
<[x]> and the sign of <[y]>.
|
|
<<copysignf>> returns a <<float>> with the magnitude of
|
|
<[x]> and the sign of <[y]>.
|
|
|
|
PORTABILITY
|
|
<<copysign>> is not required by either ANSI C or the System V Interface
|
|
Definition (Issue 2).
|
|
|
|
*/
|
|
|
|
/*
|
|
* copysign(double x, double y)
|
|
* copysign(x,y) returns a value with the magnitude of x and
|
|
* with the sign bit of y.
|
|
*/
|
|
|
|
#include "fdlibm.h"
|
|
|
|
#ifndef _DOUBLE_IS_32BITS
|
|
|
|
#ifdef __STDC__
|
|
double copysign(double x, double y)
|
|
#else
|
|
double copysign(x,y)
|
|
double x,y;
|
|
#endif
|
|
{
|
|
uint32_t hx,hy;
|
|
GET_HIGH_WORD(hx,x);
|
|
GET_HIGH_WORD(hy,y);
|
|
SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
|
|
return x;
|
|
}
|
|
|
|
#endif /* _DOUBLE_IS_32BITS */
|