1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24/* 25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 .file "copysign.s" 30 31#include "libm.h" 32LIBM_ANSI_PRAGMA_WEAK(copysign,function) 33 34 ENTRY(copysign) 35 movl 8(%esp),%eax / eax <-- hi_32(x) 36 movl 16(%esp),%ecx / ecx <-- hi_32(y) 37 andl $0x7fffffff,%eax / eax <-- hi_32(abs(x)) 38 andl $0x80000000,%ecx / ecx[31] <-- sign_bit(y) 39 orl %ecx,%eax / eax <-- hi_32(copysign(x,y)) 40 movl 4(%esp),%ecx / ecx <-- lo_32(x) 41 / = lo_32(copysign(x,y)) 42 subl $8,%esp / set up loading dock for result 43 movl %ecx,(%esp) / copy lo_32(result) to loading dock 44 movl %eax,4(%esp) / copy hi_32(result) to loading dock 45 fldl (%esp) / load copysign(x,y) 46 fwait / in case fldl causes exception 47 addl $8,%esp / restore stack-pointer for return 48 ret 49 .align 4 50 SET_SIZE(copysign) 51