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- # 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