hwmuldiv.s revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 (c) 1997,2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
.ident "%Z%%M% %I% %E% SMI"
.file "%M%"
#include <sys/asm_linkage.h>
#include "synonyms.h"
/*
* Convert 32-bit arg pairs in %o0:o1 and %o2:%o3 to 64-bit args in %o1 and %o2
*/
#define ARGS_TO_64 \
sllx %o0, 32, %o0; \
srl %o1, 0, %o1; \
sllx %o2, 32, %o2; \
srl %o3, 0, %o3; \
or %o0, %o1, %o1; \
or %o2, %o3, %o2
!
! division, signed
!
ENTRY(__div64)
ARGS_TO_64
sdivx %o1, %o2, %o1
retl
srax %o1, 32, %o0
SET_SIZE(__div64)
!
! division, unsigned
!
ENTRY(__udiv64)
ARGS_TO_64
udivx %o1, %o2, %o1
retl
srax %o1, 32, %o0
SET_SIZE(__udiv64)
!
! multiplication, signed and unsigned
!
ENTRY(__mul64)
ALTENTRY(__umul64)
ARGS_TO_64
sub %o1, %o2, %o0 ! %o0 = a - b
movrlz %o0, %g0, %o0 ! %o0 = (a < b) ? 0 : a - b
sub %o1, %o0, %o1 ! %o1 = (a < b) ? a : b = min(a, b)
add %o2, %o0, %o2 ! %o2 = (a < b) ? b : a = max(a, b)
mulx %o1, %o2, %o1 ! min(a, b) in "rs1" for early exit
retl
srax %o1, 32, %o0
SET_SIZE(__mul64)
SET_SIZE(__umul64)
!
! unsigned remainder
!
ENTRY(__urem64)
ARGS_TO_64
udivx %o1, %o2, %o3
mulx %o3, %o2, %o3
sub %o1, %o3, %o1
retl
srax %o1, 32, %o0
SET_SIZE(__urem64)
!
! signed remainder
!
ENTRY(__rem64)
ARGS_TO_64
sdivx %o1, %o2, %o3
mulx %o2, %o3, %o3
sub %o1, %o3, %o1
retl
srax %o1, 32, %o0
SET_SIZE(__rem64)