| /* 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 |
| |
