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 __truncf = truncf 3125c28e83SPiotr Jasiukajtis 3225c28e83SPiotr Jasiukajtis #include "libm.h" 3325c28e83SPiotr Jasiukajtis 3425c28e83SPiotr Jasiukajtis float truncf(float x)3525c28e83SPiotr Jasiukajtistruncf(float x) { 3625c28e83SPiotr Jasiukajtis union { 3725c28e83SPiotr Jasiukajtis unsigned i; 3825c28e83SPiotr Jasiukajtis float f; 3925c28e83SPiotr Jasiukajtis } xx; 4025c28e83SPiotr Jasiukajtis unsigned hx, sx, i; 4125c28e83SPiotr Jasiukajtis 4225c28e83SPiotr Jasiukajtis xx.f = x; 4325c28e83SPiotr Jasiukajtis hx = xx.i & ~0x80000000; 4425c28e83SPiotr Jasiukajtis sx = xx.i & 0x80000000; 4525c28e83SPiotr Jasiukajtis if (hx < 0x4b000000) { /* |x| < 2^23 */ 4625c28e83SPiotr Jasiukajtis if (hx < 0x3f800000) /* |x| < 1 */ 4725c28e83SPiotr Jasiukajtis return (sx ? -0.0F : 0.0F); 4825c28e83SPiotr Jasiukajtis 4925c28e83SPiotr Jasiukajtis /* chop x at the integer bit */ 5025c28e83SPiotr Jasiukajtis i = 1 << (0x95 - (hx >> 23)); 5125c28e83SPiotr Jasiukajtis xx.i &= ~((i << 1) - 1); 5225c28e83SPiotr Jasiukajtis return (xx.f); 5325c28e83SPiotr Jasiukajtis } else if (hx < 0x7f800000) /* |x| is integral */ 5425c28e83SPiotr Jasiukajtis return (x); 5525c28e83SPiotr Jasiukajtis else 5625c28e83SPiotr Jasiukajtis #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN) 5725c28e83SPiotr Jasiukajtis return (hx > 0x7f800000 ? x * x : x + x); 5825c28e83SPiotr Jasiukajtis #else 5925c28e83SPiotr Jasiukajtis return (x + x); 6025c28e83SPiotr Jasiukajtis #endif 6125c28e83SPiotr Jasiukajtis } 62