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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2325c28e83SPiotr Jasiukajtis */ 2425c28e83SPiotr Jasiukajtis /* 2525c28e83SPiotr Jasiukajtis * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 2625c28e83SPiotr Jasiukajtis * Use is subject to license terms. 2725c28e83SPiotr Jasiukajtis */ 2825c28e83SPiotr Jasiukajtis 29*ddc0e0b5SRichard Lowe #pragma weak __scalbf = scalbf 3025c28e83SPiotr Jasiukajtis 3125c28e83SPiotr Jasiukajtis #include "libm.h" 3225c28e83SPiotr Jasiukajtis 3325c28e83SPiotr Jasiukajtis float 3425c28e83SPiotr Jasiukajtis scalbf(float x, float y) { 3525c28e83SPiotr Jasiukajtis int ix, iy, hx, hy, n; 3625c28e83SPiotr Jasiukajtis 3725c28e83SPiotr Jasiukajtis ix = *(int *)&x; 3825c28e83SPiotr Jasiukajtis iy = *(int *)&y; 3925c28e83SPiotr Jasiukajtis hx = ix & ~0x80000000; 4025c28e83SPiotr Jasiukajtis hy = iy & ~0x80000000; 4125c28e83SPiotr Jasiukajtis 4225c28e83SPiotr Jasiukajtis if (hx > 0x7f800000 || hy >= 0x7f800000) { 4325c28e83SPiotr Jasiukajtis /* x is nan or y is inf or nan */ 4425c28e83SPiotr Jasiukajtis return ((iy < 0)? x / -y : x * y); 4525c28e83SPiotr Jasiukajtis } 4625c28e83SPiotr Jasiukajtis 4725c28e83SPiotr Jasiukajtis /* see if y is an integer without raising inexact */ 4825c28e83SPiotr Jasiukajtis if (hy >= 0x4b000000) { 4925c28e83SPiotr Jasiukajtis /* |y| >= 2^23, so it must be an integer */ 5025c28e83SPiotr Jasiukajtis n = (iy < 0)? -65000 : 65000; 5125c28e83SPiotr Jasiukajtis } else if (hy < 0x3f800000) { 5225c28e83SPiotr Jasiukajtis /* |y| < 1, so it must be zero or non-integer */ 5325c28e83SPiotr Jasiukajtis return ((hy == 0)? x : (x - x) / (x - x)); 5425c28e83SPiotr Jasiukajtis } else { 5525c28e83SPiotr Jasiukajtis if (hy & ((1 << (0x96 - (hy >> 23))) - 1)) 5625c28e83SPiotr Jasiukajtis return ((y - y) / (y - y)); 5725c28e83SPiotr Jasiukajtis n = (int)y; 5825c28e83SPiotr Jasiukajtis } 5925c28e83SPiotr Jasiukajtis return (scalbnf(x, n)); 6025c28e83SPiotr Jasiukajtis } 61