compiler/mlib/w_acoshf.c

   1 /* w_acoshf.c -- float version of w_acosh.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  *
  15  */
  16
  17 #ifndef lint
  18 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_acoshf.c,v 1.5 1999/08/28 00:06:57 peter Exp $";
  19 #endif
  20
  21 /*
  22  * wrapper acoshf(x)
  23  */
  24
  25 #include "math.h"
  26 #include "math_private.h"
  27
  28 #ifdef __STDC__
  29         float acoshf(float x)           /* wrapper acoshf */
  30 #else
  31         float acoshf(x)                 /* wrapper acoshf */
  32         float x;
  33 #endif
  34 {
  35 #ifdef _IEEE_LIBM
  36         return __ieee754_acoshf(x);
  37 #else
  38         float z;
  39         z = __ieee754_acoshf(x);
  40         if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
  41         if(x<(float)1.0) {
  42                 /* acosh(x<1) */
  43                 return (float)__kernel_standard((double)x,(double)x,129);
  44         } else
  45             return z;
  46 #endif
  47 }