remquol.s revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
* 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 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "remquol.s"
#include "libm.h"
LIBM_ANSI_PRAGMA_WEAK(remquol,function)
#include "libm_synonyms.h"
#include "libm_protos.h"
ENTRY(remquol)
fldt 16(%esp) / load arg y
fldt 4(%esp) / load arg x
.Lreml_loop:
fprem1 / partial remainder
fstsw %ax / store status word
andw $0x400,%ax / check whether reduction complete
jne .Lreml_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 12(%esp),%edx / sign and bexp of x
movl 24(%esp),%ecx / sign and bexp of y
andl $0x00008000,%edx / edx <- sign(x)
andl $0x00008000,%ecx / ecx <- sign(y)
cmpl %edx,%ecx
je .pos
negl %eax / negative n
.pos:
movl 28(%esp),%ecx
movl %eax,0(%ecx) / last 3 significant bits of quotient
ret
.align 4
SET_SIZE(remquol)