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; Clipper __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
; store difference in a third limb vector.
; Copyright (C) 1995 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 Library General Public License as published by
; the Free Software Foundation; either version 2 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 Library General Public
; License for more details.
; You should have received a copy of the GNU Library General Public License
; along with the GNU MP Library; see the file COPYING.LIB. If not, write to
; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
; MA 02111-1307, USA.
.text
.align 16
.globl ___mpn_sub_n
___mpn_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
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