mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
64 lines
2.0 KiB
ArmAsm
64 lines
2.0 KiB
ArmAsm
/* Add two limb vectors of the same length > 0 and store sum in a third
|
|
limb vector.
|
|
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
|
|
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not,
|
|
see <http://www.gnu.org/licenses/>. */
|
|
|
|
/*
|
|
INPUT PARAMETERS
|
|
res_ptr %r2
|
|
s1_ptr %r3
|
|
s2_ptr %r4
|
|
size %r5
|
|
*/
|
|
|
|
#include "sysdep.h"
|
|
#include "asm-syntax.h"
|
|
|
|
.text
|
|
ENTRY(__mpn_add_n)
|
|
st %r6,24(%r15) # save register 6
|
|
cfi_offset (%r6, -72)
|
|
sr %r1,%r1
|
|
lhi %r0,1 # cannot use ahi to add carry, use alr
|
|
.L0: l %r6,0(%r1,%r3) # .L0 -> no carry from last add
|
|
al %r6,0(%r1,%r4)
|
|
st %r6,0(%r1,%r2)
|
|
la %r1,4(0,%r1)
|
|
brc 3,.L3
|
|
.L1: brct %r5,.L0
|
|
slr %r2,%r2 # no last carry to return
|
|
j .Lexit
|
|
.L2: l %r6,0(%r1,%r3) # .L2 -> carry from last add
|
|
al %r6,0(%r1,%r4)
|
|
brc 3,.L4
|
|
alr %r6,%r0 # no carry yet, add carry from last add
|
|
st %r6,0(%r1,%r2)
|
|
la %r1,4(0,%r1)
|
|
brc 12,.L1 # new carry ?
|
|
.L3: brct %r5,.L2
|
|
lr %r2,%r0 # return last carry
|
|
j .Lexit
|
|
.L4: alr %r6,%r0 # already a carry, add carry from last add
|
|
st %r6,0(%r1,%r2)
|
|
la %r1,4(0,%r1)
|
|
brct %r5,.L2
|
|
lr %r2,%r0 # return last carry
|
|
.Lexit: l %r6,24(%r15) # restore register 6
|
|
br %r14
|
|
END(__mpn_add_n)
|