2003-11-14 17:48:57 +01:00
|
|
|
/*
|
|
|
|
* Hardware integer division and multiplication routines for SPARC v8 and higher.
|
|
|
|
*
|
|
|
|
* Copyright (C) 1996 David S. Miller (davem@redhat.com)
|
|
|
|
* Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
|
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* in the Software without restriction, including without limitation the rights
|
|
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice shall be included in
|
|
|
|
* all copies or substantial portions of the Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* JAKUB JELINEK OR DAVID MILLER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
|
|
* IN THE SOFTWARE.
|
|
|
|
*/
|
2004-03-14 09:34:49 +01:00
|
|
|
/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/SparcMulDiv.S,v 1.1 2000/11/02 19:10:54 dawes Exp $ */
|
2003-11-14 17:48:57 +01:00
|
|
|
|
|
|
|
.globl urem_sparcv89, umul_sparcv89, udiv_sparcv89
|
|
|
|
.globl rem_sparcv89, mul_sparcv89, div_sparcv89
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
urem_sparcv89:
|
|
|
|
wr %g0, 0x0, %y
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
udiv %o0, %o1, %o2
|
|
|
|
umul %o2, %o1, %o2
|
|
|
|
retl
|
|
|
|
sub %o0, %o2, %o0
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
umul_sparcv89:
|
|
|
|
umul %o0, %o1, %o0
|
|
|
|
retl
|
|
|
|
rd %y, %o1
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
udiv_sparcv89:
|
|
|
|
wr %g0, 0x0, %y
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
retl
|
|
|
|
udiv %o0, %o1, %o0
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
rem_sparcv89:
|
|
|
|
sra %o0, 0x1f, %o4
|
|
|
|
wr %o4, 0x0, %y
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
sdivcc %o0, %o1, %o2
|
|
|
|
bvs,a 1f
|
|
|
|
xnor %o2, %g0, %o2
|
|
|
|
1: smul %o2, %o1, %o2
|
|
|
|
retl
|
|
|
|
sub %o0, %o2, %o0
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
mul_sparcv89:
|
|
|
|
smul %o0, %o1, %o0
|
|
|
|
retl
|
|
|
|
rd %y, %o1
|
|
|
|
nop
|
|
|
|
|
|
|
|
.align 32
|
|
|
|
div_sparcv89:
|
|
|
|
sra %o0, 0x1f, %o2
|
|
|
|
wr %o2, 0x0, %y
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
nop
|
|
|
|
sdivcc %o0, %o1, %o0
|
|
|
|
bvs,a 1f
|
|
|
|
xnor %o0, %g0, %o0
|
|
|
|
1: retl
|
|
|
|
nop
|