125c28e83SPiotr Jasiukajtis /* 225c28e83SPiotr Jasiukajtis * CDDL HEADER START 325c28e83SPiotr Jasiukajtis * 425c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 525c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 625c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 725c28e83SPiotr Jasiukajtis * 825c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 925c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 1025c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 1125c28e83SPiotr Jasiukajtis * and limitations under the License. 1225c28e83SPiotr Jasiukajtis * 1325c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 1425c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 1525c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 1625c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 1725c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 1825c28e83SPiotr Jasiukajtis * 1925c28e83SPiotr Jasiukajtis * CDDL HEADER END 2025c28e83SPiotr Jasiukajtis */ 2125c28e83SPiotr Jasiukajtis 2225c28e83SPiotr Jasiukajtis /* 2325c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2425c28e83SPiotr Jasiukajtis */ 2525c28e83SPiotr Jasiukajtis /* 2625c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 2725c28e83SPiotr Jasiukajtis * Use is subject to license terms. 2825c28e83SPiotr Jasiukajtis */ 2925c28e83SPiotr Jasiukajtis 30*ddc0e0b5SRichard Lowe #pragma weak __ldexp = ldexp 3125c28e83SPiotr Jasiukajtis 3225c28e83SPiotr Jasiukajtis #include "libm.h" 3325c28e83SPiotr Jasiukajtis #include <errno.h> 3425c28e83SPiotr Jasiukajtis 3525c28e83SPiotr Jasiukajtis double ldexp(double x,int n)3625c28e83SPiotr Jasiukajtisldexp(double x, int n) { 3725c28e83SPiotr Jasiukajtis int *px = (int *) &x, ix = px[HIWORD] & ~0x80000000; 3825c28e83SPiotr Jasiukajtis 3925c28e83SPiotr Jasiukajtis if (ix >= 0x7ff00000 || (px[LOWORD] | ix) == 0) 4025c28e83SPiotr Jasiukajtis #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN) 4125c28e83SPiotr Jasiukajtis return (ix >= 0x7ff80000 ? x : x + x); 4225c28e83SPiotr Jasiukajtis /* assumes sparc-like QNaN */ 4325c28e83SPiotr Jasiukajtis #else 4425c28e83SPiotr Jasiukajtis return (x + x); 4525c28e83SPiotr Jasiukajtis #endif 4625c28e83SPiotr Jasiukajtis x = scalbn(x, n); 4725c28e83SPiotr Jasiukajtis ix = px[HIWORD] & ~0x80000000; 4825c28e83SPiotr Jasiukajtis /* 4925c28e83SPiotr Jasiukajtis * SVID3 requires both overflow and underflow cases to set errno 5025c28e83SPiotr Jasiukajtis * XPG3/XPG4/XPG4.2/SUSv2 requires overflow to set errno 5125c28e83SPiotr Jasiukajtis */ 5225c28e83SPiotr Jasiukajtis if (ix >= 0x7ff00000 || (px[LOWORD] | ix) == 0) 5325c28e83SPiotr Jasiukajtis errno = ERANGE; 5425c28e83SPiotr Jasiukajtis return (x); 5525c28e83SPiotr Jasiukajtis } 56