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- # 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., 59 Temple Place - Suite 330, Boston,
- # MA 02111-1307, 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