mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 02:40:08 +00:00
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
|
/* w_log10f.c -- float version of w_log10.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_log10f.c,v 1.3 1995/05/10 20:49:37 jtc Exp $";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* wrapper log10f(X)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "math.h"
|
||
|
|
#include "math_private.h"
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
float __log10f(float x) /* wrapper log10f */
|
||
|
|
#else
|
||
|
|
float __log10f(x) /* wrapper log10f */
|
||
|
|
float x;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifdef _IEEE_LIBM
|
||
|
|
return __ieee754_log10f(x);
|
||
|
|
#else
|
||
|
|
float z;
|
||
|
|
z = __ieee754_log10f(x);
|
||
|
|
if(_LIB_VERSION == _IEEE_ || __isnanf(x)) return z;
|
||
|
|
if(x<=(float)0.0) {
|
||
|
|
if(x==(float)0.0)
|
||
|
|
/* log10(0) */
|
||
|
|
return (float)__kernel_standard((double)x,(double)x,118);
|
||
|
|
else
|
||
|
|
/* log10(x<0) */
|
||
|
|
return (float)__kernel_standard((double)x,(double)x,119);
|
||
|
|
} else
|
||
|
|
return z;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
weak_alias (__log10f, log10f)
|