49 lines
1.4 KiB
ArmAsm
49 lines
1.4 KiB
ArmAsm
|
; Clipper __gmpn_sub_n -- Subtract two limb vectors of the same length > 0 and
|
||
|
|
; store difference in a third limb vector.
|
||
|
|
|
||
|
|
; Copyright 1995, 2000 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
; 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, write to
|
||
|
|
; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
|
|
; MA 02110-1301, USA.
|
||
|
|
|
||
|
|
.text
|
||
|
|
.align 16
|
||
|
|
.globl ___gmpn_sub_n
|
||
|
|
___gmpn_sub_n:
|
||
|
|
subq $8,sp
|
||
|
|
storw r6,(sp)
|
||
|
|
loadw 12(sp),r2
|
||
|
|
loadw 16(sp),r3
|
||
|
|
loadq $0,r6 ; clear carry-save register
|
||
|
|
|
||
|
|
.Loop: loadw (r1),r4
|
||
|
|
loadw (r2),r5
|
||
|
|
addwc r6,r6 ; restore carry from r6
|
||
|
|
subwc r5,r4
|
||
|
|
storw r4,(r0)
|
||
|
|
subwc r6,r6 ; save carry in r6
|
||
|
|
addq $4,r0
|
||
|
|
addq $4,r1
|
||
|
|
addq $4,r2
|
||
|
|
subq $1,r3
|
||
|
|
brne .Loop
|
||
|
|
|
||
|
|
negw r6,r0
|
||
|
|
loadw (sp),r6
|
||
|
|
addq $8,sp
|
||
|
|
ret sp
|