math/w_scalbl.c

   1 /* w_scalbl.c -- long double version of w_scalb.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 static char rcsid[] = "$NetBSD: $";
  19 #endif
  20
  21 /*
  22  * wrapper scalbl(long double x, long double fn) is provide for
  23  * passing various standard test suite. One
  24  * should use scalbnl() instead.
  25  */
  26
  27 #include "math.h"
  28 #include "math_private.h"
  29
  30 #include <errno.h>
  31
  32 #ifdef __STDC__
  33 #ifdef _SCALB_INT
  34         long double __scalbl(long double x, int fn)     /* wrapper scalbl */
  35 #else
  36         long double __scalbl(long double x, long double fn)/* wrapper scalbl */
  37 #endif
  38 #else
  39         long double __scalbl(x,fn)                      /* wrapper scalbl */
  40 #ifdef _SCALB_INT
  41         long double x; int fn;
  42 #else
  43         long double x,fn;
  44 #endif
  45 #endif
  46 {
  47 #ifdef _IEEE_LIBM
  48         return __ieee754_scalbl(x,fn);
  49 #else
  50         long double z;
  51         z = __ieee754_scalbl(x,fn);
  52         if(_LIB_VERSION == _IEEE_) return z;
  53         if(!(__finitel(z)||__isnanl(z))&&__finitel(x)) {
  54             return __kernel_standard(x,(double)fn,232); /* scalb overflow */
  55         }
  56         if(z==0.0&&z!=x) {
  57             return __kernel_standard(x,(double)fn,233); /* scalb underflow */
  58         }
  59 #ifndef _SCALB_INT
  60         if(!__finitel(fn)) __set_errno (ERANGE);
  61 #endif
  62         return z;
  63 #endif
  64 }
  65 weak_alias (__scalbl, scalbl)