86 lines
2.1 KiB
ArmAsm
86 lines
2.1 KiB
ArmAsm
# MIPS __mpn_mul_1 -- Multiply a limb vector with a single limb and
|
|
# store the product in a second limb vector.
|
|
|
|
# Copyright (C) 1992, 1994, 1996 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
|
|
# s1_ptr $5
|
|
# size $6
|
|
# s2_limb $7
|
|
|
|
.text
|
|
.align 4
|
|
.globl __mpn_mul_1
|
|
.ent __mpn_mul_1
|
|
__mpn_mul_1:
|
|
.set noreorder
|
|
.set nomacro
|
|
|
|
# warm up phase 0
|
|
lw $8,0($5)
|
|
|
|
# warm up phase 1
|
|
addiu $5,$5,4
|
|
multu $8,$7
|
|
|
|
addiu $6,$6,-1
|
|
beq $6,$0,$LC0
|
|
move $2,$0 # zero cy2
|
|
|
|
addiu $6,$6,-1
|
|
beq $6,$0,$LC1
|
|
lw $8,0($5) # load new s1 limb as early as possible
|
|
|
|
Loop: mflo $10
|
|
mfhi $9
|
|
addiu $5,$5,4
|
|
addu $10,$10,$2 # add old carry limb to low product limb
|
|
multu $8,$7
|
|
lw $8,0($5) # load new s1 limb as early as possible
|
|
addiu $6,$6,-1 # decrement loop counter
|
|
sltu $2,$10,$2 # carry from previous addition -> $2
|
|
sw $10,0($4)
|
|
addiu $4,$4,4
|
|
bne $6,$0,Loop
|
|
addu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
# cool down phase 1
|
|
$LC1: mflo $10
|
|
mfhi $9
|
|
addu $10,$10,$2
|
|
sltu $2,$10,$2
|
|
multu $8,$7
|
|
sw $10,0($4)
|
|
addiu $4,$4,4
|
|
addu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
# cool down phase 0
|
|
$LC0: mflo $10
|
|
mfhi $9
|
|
addu $10,$10,$2
|
|
sltu $2,$10,$2
|
|
sw $10,0($4)
|
|
j $31
|
|
addu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
.end __mpn_mul_1
|