89 lines
2.2 KiB
ArmAsm
89 lines
2.2 KiB
ArmAsm
/* mips3 mpih-mul1.S -- Multiply a limb vector with a limb and store
|
|
* the result in a second limb vector.
|
|
*
|
|
* Copyright (C) 1992, 1994, 1995, 1998, 2000
|
|
* 2001, 2002 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of Libgcrypt.
|
|
*
|
|
* Libgcrypt is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as
|
|
* published by the Free Software Foundation; either version 2.1 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* Libgcrypt 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
|
|
|
|
/*******************
|
|
* mpi_limb_t
|
|
* _gcry_mpih_mul_1( mpi_ptr_t res_ptr, (r4)
|
|
* mpi_ptr_t s1_ptr, (r5)
|
|
* mpi_size_t s1_size, (r6)
|
|
* mpi_limb_t s2_limb) (r7)
|
|
*/
|
|
|
|
.text
|
|
.align 4
|
|
.globl _gcry_mpih_mul_1
|
|
.ent _gcry_mpih_mul_1
|
|
_gcry_mpih_mul_1:
|
|
.set noreorder
|
|
.set nomacro
|
|
|
|
/* # warm up phase 0 */
|
|
ld $8,0($5)
|
|
|
|
/* # warm up phase 1 */
|
|
daddiu $5,$5,8
|
|
dmultu $8,$7
|
|
|
|
daddiu $6,$6,-1
|
|
beq $6,$0,$LC0
|
|
move $2,$0 # zero cy2
|
|
|
|
daddiu $6,$6,-1
|
|
beq $6,$0,$LC1
|
|
ld $8,0($5) # load new s1 limb as early as possible
|
|
|
|
Loop: mflo $10
|
|
mfhi $9
|
|
daddiu $5,$5,8
|
|
daddu $10,$10,$2 # add old carry limb to low product limb
|
|
dmultu $8,$7
|
|
ld $8,0($5) # load new s1 limb as early as possible
|
|
daddiu $6,$6,-1 # decrement loop counter
|
|
sltu $2,$10,$2 # carry from previous addition -> $2
|
|
sd $10,0($4)
|
|
daddiu $4,$4,8
|
|
bne $6,$0,Loop
|
|
daddu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
/* # cool down phase 1 */
|
|
$LC1: mflo $10
|
|
mfhi $9
|
|
daddu $10,$10,$2
|
|
sltu $2,$10,$2
|
|
dmultu $8,$7
|
|
sd $10,0($4)
|
|
daddiu $4,$4,8
|
|
daddu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
/* # cool down phase 0 */
|
|
$LC0: mflo $10
|
|
mfhi $9
|
|
daddu $10,$10,$2
|
|
sltu $2,$10,$2
|
|
sd $10,0($4)
|
|
j $31
|
|
daddu $2,$9,$2 # add high product limb and carry from addition
|
|
|
|
.end _gcry_mpih_mul_1
|
|
|