mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 09:30:06 +00:00
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* w_scalbf.c -- float version of w_scalb.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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: w_scalbf.c,v 1.3 1995/05/10 20:49:50 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper scalbf(float x, float fn) is provide for
|
|
* passing various standard test suite. One
|
|
* should use scalbn() instead.
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#include <errno.h>
|
|
|
|
#ifdef __STDC__
|
|
#ifdef _SCALB_INT
|
|
float __scalbf(float x, int fn) /* wrapper scalbf */
|
|
#else
|
|
float __scalbf(float x, float fn) /* wrapper scalbf */
|
|
#endif
|
|
#else
|
|
float __scalbf(x,fn) /* wrapper scalbf */
|
|
#ifdef _SCALB_INT
|
|
float x; int fn;
|
|
#else
|
|
float x,fn;
|
|
#endif
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_scalbf(x,fn);
|
|
#else
|
|
float z;
|
|
z = __ieee754_scalbf(x,fn);
|
|
if(_LIB_VERSION != _SVID_) return z;
|
|
if(!(__finitef(z)||__isnanf(z))&&__finitef(x)) {
|
|
/* scalbf overflow */
|
|
return (float)__kernel_standard((double)x,(double)fn,132);
|
|
}
|
|
if(z==(float)0.0&&z!=x) {
|
|
/* scalbf underflow */
|
|
return (float)__kernel_standard((double)x,(double)fn,133);
|
|
}
|
|
#ifndef _SCALB_INT
|
|
if(!__finitef(fn)) __set_errno (ERANGE);
|
|
#endif
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__scalbf, scalbf)
|