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glibc/math/w_scalbl.c
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/* w_scalbl.c -- long double version of w_scalb.c. | |
* Conversion to long double by Ulrich Drepper, | |
* Cygnus Support, drepper@cygnus.com. | |
*/ | |
/* | |
* ==================================================== | |
* 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. | |
* ==================================================== | |
*/ | |
#if defined(LIBM_SCCS) && !defined(lint) | |
static char rcsid[] = "$NetBSD: $"; | |
#endif | |
/* | |
* wrapper scalbl(long double x, long double fn) is provide for | |
* passing various standard test suite. One | |
* should use scalbnl() instead. | |
*/ | |
#include "math.h" | |
#include "math_private.h" | |
#include <errno.h> | |
#ifdef __STDC__ | |
#ifdef _SCALB_INT | |
long double __scalbl(long double x, int fn) /* wrapper scalbl */ | |
#else | |
long double __scalbl(long double x, long double fn)/* wrapper scalbl */ | |
#endif | |
#else | |
long double __scalbl(x,fn) /* wrapper scalbl */ | |
#ifdef _SCALB_INT | |
long double x; int fn; | |
#else | |
long double x,fn; | |
#endif | |
#endif | |
{ | |
#ifdef _IEEE_LIBM | |
return __ieee754_scalbl(x,fn); | |
#else | |
long double z; | |
z = __ieee754_scalbl(x,fn); | |
if(_LIB_VERSION == _IEEE_) return z; | |
if(!(__finitel(z)||__isnanl(z))&&__finitel(x)) { | |
return __kernel_standard(x,(double)fn,232); /* scalb overflow */ | |
} | |
if(z==0.0&&z!=x) { | |
return __kernel_standard(x,(double)fn,233); /* scalb underflow */ | |
} | |
#ifndef _SCALB_INT | |
if(!__finitel(fn)) __set_errno (ERANGE); | |
#endif | |
return z; | |
#endif | |
} | |
weak_alias (__scalbl, scalbl) |