| 0,0 → 1,66 |
|---|
| /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
| /* 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[] = "$Id: w_scalbf.c,v 1.1 1994/08/10 20:35:40 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 == _IEEE_) 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)) errno = ERANGE; |
| #endif |
| return z; |
| #endif |
| } |