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 "copysignl.s" 30 31 #include "libm.h" 32 LIBM_ANSI_PRAGMA_WEAK(copysignl,function) 33 #include "libm_synonyms.h" 34 35 ENTRY(copysignl) 36 movl 12(%esp),%eax / sign and bexp of x 37 movl 24(%esp),%ecx / sign and bexp of y 38 andl $0x00007fff,%eax / eax <-- bexp(x) 39 andl $0x00008000,%ecx / ecx <-- sign(y) 40 orl %ecx,%eax / eax <-- bexp(x) with sign(y) 41 movl 8(%esp),%ecx / ecx <-- hi_32(sgnfcnd(x)) 42 movl 4(%esp),%edx / edx <-- lo_32(sgnfcnd(x)) 43 subl $12,%esp / set up loading dock for result 44 movl %edx,(%esp) / copy lo_32(result's sgnfcnd) 45 / to loading dock 46 movl %ecx,4(%esp) / copy hi_32(result's sgnfcnd) 47 / to loading dock 48 movl %eax,8(%esp) / copy sign&bexp(result) 49 / to loading dock 50 fldt (%esp) / load copysign(x,y) 51 addl $12,%esp / restore stack-pointer for return 52 ret 53 .align 4 54 SET_SIZE(copysignl)