1/* @(#)w_scalb.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#if defined(LIBM_SCCS) && !defined(lint) 14static char rcsid[] = "$NetBSD: w_scalb.c,v 1.6 1995/05/10 20:49:48 jtc Exp $"; 15#endif 16 17/* 18 * wrapper scalb(double x, double fn) is provide for 19 * passing various standard test suite. One 20 * should use scalbn() instead. 21 */ 22 23#include "math.h" 24#include "math_private.h" 25 26#include <errno.h> 27 28#ifdef __STDC__ 29#ifdef _SCALB_INT 30 double __scalb(double x, int fn) /* wrapper scalb */ 31#else 32 double __scalb(double x, double fn) /* wrapper scalb */ 33#endif 34#else 35 double __scalb(x,fn) /* wrapper scalb */ 36#ifdef _SCALB_INT 37 double x; int fn; 38#else 39 double x,fn; 40#endif 41#endif 42{ 43#ifdef _IEEE_LIBM 44 return __ieee754_scalb(x,fn); 45#else 46 double z; 47 z = __ieee754_scalb(x,fn); 48 if(_LIB_VERSION != _SVID_) return z; 49 if(!(__finite(z)||__isnan(z))&&__finite(x)) { 50 return __kernel_standard(x,(double)fn,32); /* scalb overflow */ 51 } 52 if(z==0.0&&z!=x) { 53 return __kernel_standard(x,(double)fn,33); /* scalb underflow */ 54 } 55#ifndef _SCALB_INT 56 if(!__finite(fn)) __set_errno (ERANGE); 57#endif 58 return z; 59#endif 60} 61weak_alias (__scalb, scalb) 62#ifdef NO_LONG_DOUBLE 63strong_alias (__scalb, __scalbl) 64weak_alias (__scalb, scalbl) 65#endif 66