sub_n.s
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- ; 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 3 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. If not, see http://www.gnu.org/licenses/.
- .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