diff options
Diffstat (limited to 'usr/src/libm/src/i386/common/remquo.s')
| -rw-r--r-- | usr/src/libm/src/i386/common/remquo.s | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/usr/src/libm/src/i386/common/remquo.s b/usr/src/libm/src/i386/common/remquo.s new file mode 100644 index 0000000..8686151 --- /dev/null +++ b/usr/src/libm/src/i386/common/remquo.s @@ -0,0 +1,69 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2006 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + + .ident "@(#)remquo.s 1.6 06/01/23 SMI" + + .file "remquo.s" + +#include "libm.h" +LIBM_ANSI_PRAGMA_WEAK(remquo,function) +#include "libm_synonyms.h" +#include "libm_protos.h" + + ENTRY(remquo) + fldl 12(%esp) / load arg y + fldl 4(%esp) / load arg x +.Lrem_loop: + fprem1 / partial remainder + fstsw %ax / store status word + andw $0x400,%ax / check whether reduction complete + jne .Lrem_loop / while reduction incomplete, do fprem1 + fstsw %ax + fwait + fstp %st(1) + movw %ax,%dx + andw $0x4000,%dx / get C3 + sarw $13,%dx + movw %ax,%cx + andw $0x100,%cx / get C0 + sarw $6,%cx + addw %cx,%dx + andw $0x200,%ax / get C1 + sarw $9,%ax + addw %dx,%ax + cwtl + movl 8(%esp),%edx / sign and bexp of x + movl 16(%esp),%ecx / sign and bexp of y + andl $0x80000000,%edx / edx <- sign(x) + andl $0x80000000,%ecx / ecx <- sign(y) + cmpl %edx,%ecx + je .pos + negl %eax / negative n +.pos: + movl 20(%esp),%ecx + movl %eax,0(%ecx) / last 3 significant bits of quotient + ret + .align 4 + SET_SIZE(remquo) |