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# MIPS2 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
# store difference in a third limb vector.
# 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
# s1_ptr $5
# s2_ptr $6
# size $7
.text
.align 2
.globl __mpn_sub_n
.ent __mpn_sub_n
__mpn_sub_n:
.set noreorder
.set nomacro
lw $10,0($5)
lw $11,0($6)
addiu $7,$7,-1
and $9,$7,4-1 # number of limbs in first loop
beq $9,$0,.L0 # if multiple of 4 limbs, skip first loop
move $2,$0
subu $7,$7,$9
.Loop0: addiu $9,$9,-1
lw $12,4($5)
addu $11,$11,$2
lw $13,4($6)
sltu $8,$11,$2
subu $11,$10,$11
sltu $2,$10,$11
sw $11,0($4)
or $2,$2,$8
addiu $5,$5,4
addiu $6,$6,4
move $10,$12
move $11,$13
bne $9,$0,.Loop0
addiu $4,$4,4
.L0: beq $7,$0,.Lend
nop
.Loop: addiu $7,$7,-4
lw $12,4($5)
addu $11,$11,$2
lw $13,4($6)
sltu $8,$11,$2
subu $11,$10,$11
sltu $2,$10,$11
sw $11,0($4)
or $2,$2,$8
lw $10,8($5)
addu $13,$13,$2
lw $11,8($6)
sltu $8,$13,$2
subu $13,$12,$13
sltu $2,$12,$13
sw $13,4($4)
or $2,$2,$8
lw $12,12($5)
addu $11,$11,$2
lw $13,12($6)
sltu $8,$11,$2
subu $11,$10,$11
sltu $2,$10,$11
sw $11,8($4)
or $2,$2,$8
lw $10,16($5)
addu $13,$13,$2
lw $11,16($6)
sltu $8,$13,$2
subu $13,$12,$13
sltu $2,$12,$13
sw $13,12($4)
or $2,$2,$8
addiu $5,$5,16
addiu $6,$6,16
bne $7,$0,.Loop
addiu $4,$4,16
.Lend: addu $11,$11,$2
sltu $8,$11,$2
subu $11,$10,$11
sltu $2,$10,$11
sw $11,0($4)
j $31
or $2,$2,$8
.end __mpn_sub_n
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