4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* @(#)w_pow.c 5.2 93/10/01 */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ====================================================
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Developed at SunPro, a Sun Microsystems, Inc. business.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Permission to use, copy, modify, and distribute this
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * software is freely granted, provided that this notice
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * is preserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ====================================================
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <LibConfig.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/EfiCdefs.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if defined(LIBM_SCCS) && !defined(lint)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync__RCSID("$NetBSD: w_pow.c,v 1.7 2002/05/26 22:02:02 wiz Exp $");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * wrapper pow(x,y) return x**y
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "math.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "math_private.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncdouble
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncpow(double x, double y) /* wrapper pow */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef _IEEE_LIBM
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __ieee754_pow(x,y);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync double z;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync z=__ieee754_pow(x,y);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(_LIB_VERSION == _IEEE_|| isnan(y)) return z;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(isnan(x)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(y==0.0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,42); /* pow(NaN,0.0) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return z;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(x==0.0){
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(y==0.0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,20); /* pow(0.0,0.0) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(finite(y)&&y<0.0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,23); /* pow(0.0,negative) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return z;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(!finite(z)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(finite(x)&&finite(y)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(isnan(z))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,24); /* pow neg**non-int */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,21); /* pow overflow */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if(z==0.0&&finite(x)&&finite(y))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return __kernel_standard(x,y,22); /* pow underflow */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return z;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}