lib/libm/src/w_fmod.c

   1 /* @(#)w_fmod.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 #include <sys/cdefs.h>
  14 #if defined(LIBM_SCCS) && !defined(lint)
  15 __RCSID("$NetBSD: w_fmod.c,v 1.10 2013/11/12 16:48:39 joerg Exp $");
  16 #endif
  17
  18 /*
  19  * wrapper fmod(x,y)
  20  */
  21
  22 #include "math.h"
  23 #include "math_private.h"
  24
  25 #ifndef __HAVE_LONG_DOUBLE
  26 __strong_alias(_fmodl, fmod)
  27 __weak_alias(fmodl, fmod)
  28 #endif
  29
  30 double
  31 fmod(double x, double y)        /* wrapper fmod */
  32 {
  33 #ifdef _IEEE_LIBM
  34         return __ieee754_fmod(x,y);
  35 #else
  36         double z;
  37         z = __ieee754_fmod(x,y);
  38         if(_LIB_VERSION == _IEEE_ ||isnan(y)||isnan(x)) return z;
  39         if(y==0.0) {
  40                 return __kernel_standard(x,y,27); /* fmod(x,0) */
  41         } else
  42             return z;
  43 #endif
  44 }