| # MIPS2 __mpn_rshift -- |
| |
| # 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| |
| |
| # INPUT PARAMETERS |
| # res_ptr $4 |
| # src_ptr $5 |
| # size $6 |
| # cnt $7 |
| |
| .text |
| .align 2 |
| .globl __mpn_rshift |
| .ent __mpn_rshift |
| __mpn_rshift: |
| .set noreorder |
| .set nomacro |
| |
| lw $10,0($5) # load first limb |
| subu $13,$0,$7 |
| addiu $6,$6,-1 |
| and $9,$6,4-1 # number of limbs in first loop |
| beq $9,$0,.L0 # if multiple of 4 limbs, skip first loop |
| sll $2,$10,$13 # compute function result |
| |
| subu $6,$6,$9 |
| |
| .Loop0: lw $3,4($5) |
| addiu $4,$4,4 |
| addiu $5,$5,4 |
| addiu $9,$9,-1 |
| srl $11,$10,$7 |
| sll $12,$3,$13 |
| move $10,$3 |
| or $8,$11,$12 |
| bne $9,$0,.Loop0 |
| sw $8,-4($4) |
| |
| .L0: beq $6,$0,.Lend |
| nop |
| |
| .Loop: lw $3,4($5) |
| addiu $4,$4,16 |
| addiu $6,$6,-4 |
| srl $11,$10,$7 |
| sll $12,$3,$13 |
| |
| lw $10,8($5) |
| srl $14,$3,$7 |
| or $8,$11,$12 |
| sw $8,-16($4) |
| sll $9,$10,$13 |
| |
| lw $3,12($5) |
| srl $11,$10,$7 |
| or $8,$14,$9 |
| sw $8,-12($4) |
| sll $12,$3,$13 |
| |
| lw $10,16($5) |
| srl $14,$3,$7 |
| or $8,$11,$12 |
| sw $8,-8($4) |
| sll $9,$10,$13 |
| |
| addiu $5,$5,16 |
| or $8,$14,$9 |
| bgtz $6,.Loop |
| sw $8,-4($4) |
| |
| .Lend: srl $8,$10,$7 |
| j $31 |
| sw $8,0($4) |
| .end __mpn_rshift |