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add_n.s
Package: gmp-5.0.1.tar.gz [view]
Upload User: qaz666999
Upload Date: 2022-08-06
Package Size: 2570k
Code Size: 2k
Category:
Algorithm
Development Platform:
Unix_Linux
- # Pyramid __gmpn_add_n -- Add two limb vectors of the same length > 0 and store
- # sum 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 2
- .globl ___gmpn_add_n
- ___gmpn_add_n:
- movw $-1,tr0 # representation for carry clear
- movw pr3,tr2
- andw $3,tr2
- beq Lend0
- subw tr2,pr3
- Loop0: rsubw $0,tr0 # restore carry bit from carry-save register
- movw (pr1),tr1
- addwc (pr2),tr1
- movw tr1,(pr0)
- subwb tr0,tr0
- addw $4,pr0
- addw $4,pr1
- addw $4,pr2
- addw $-1,tr2
- bne Loop0
- mtstw pr3,pr3
- beq Lend
- Lend0:
- Loop: rsubw $0,tr0 # restore carry bit from carry-save register
- movw (pr1),tr1
- addwc (pr2),tr1
- movw tr1,(pr0)
- movw 4(pr1),tr1
- addwc 4(pr2),tr1
- movw tr1,4(pr0)
- movw 8(pr1),tr1
- addwc 8(pr2),tr1
- movw tr1,8(pr0)
- movw 12(pr1),tr1
- addwc 12(pr2),tr1
- movw tr1,12(pr0)
- subwb tr0,tr0
- addw $16,pr0
- addw $16,pr1
- addw $16,pr2
- addw $-4,pr3
- bne Loop
- Lend:
- mnegw tr0,pr0
- ret