diff options
Diffstat (limited to 'sysdeps/libm-ieee754/w_scalb.c')
| -rw-r--r-- | sysdeps/libm-ieee754/w_scalb.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/w_scalb.c b/sysdeps/libm-ieee754/w_scalb.c new file mode 100644 index 0000000..f718bc2 --- /dev/null +++ b/sysdeps/libm-ieee754/w_scalb.c @@ -0,0 +1,61 @@ +/* @(#)w_scalb.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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_scalb.c,v 1.6 1995/05/10 20:49:48 jtc Exp $"; +#endif + +/* + * wrapper scalb(double x, double 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 + double __scalb(double x, int fn) /* wrapper scalb */ +#else + double __scalb(double x, double fn) /* wrapper scalb */ +#endif +#else + double __scalb(x,fn) /* wrapper scalb */ +#ifdef _SCALB_INT + double x; int fn; +#else + double x,fn; +#endif +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_scalb(x,fn); +#else + double z; + z = __ieee754_scalb(x,fn); + if(_LIB_VERSION == _IEEE_) return z; + if(!(__finite(z)||__isnan(z))&&__finite(x)) { + return __kernel_standard(x,(double)fn,32); /* scalb overflow */ + } + if(z==0.0&&z!=x) { + return __kernel_standard(x,(double)fn,33); /* scalb underflow */ + } +#ifndef _SCALB_INT + if(!__finite(fn)) errno = ERANGE; +#endif + return z; +#endif +} +weak_alias (__scalb, scalb) |