| ; 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 |
