1/* mips3 mpih-mul1.S -- Multiply a limb vector with a limb and store 2 * the result in a second limb vector. 3 * 4 * Copyright (C) 1992, 1994, 1995, 1998, 2000 5 * 2001, 2002 Free Software Foundation, Inc. 6 * 7 * This file is part of Libgcrypt. 8 * 9 * Libgcrypt is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU Lesser General Public License as 11 * published by the Free Software Foundation; either version 2.1 of 12 * the License, or (at your option) any later version. 13 * 14 * Libgcrypt is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 22 */ 23 24 25/******************* 26 * mpi_limb_t 27 * _gcry_mpih_mul_1( mpi_ptr_t res_ptr, (r4) 28 * mpi_ptr_t s1_ptr, (r5) 29 * mpi_size_t s1_size, (r6) 30 * mpi_limb_t s2_limb) (r7) 31 */ 32 33 .text 34 .align 4 35 .globl _gcry_mpih_mul_1 36 .ent _gcry_mpih_mul_1 37_gcry_mpih_mul_1: 38 .set noreorder 39 .set nomacro 40 41/* # warm up phase 0 */ 42 ld $8,0($5) 43 44/* # warm up phase 1 */ 45 daddiu $5,$5,8 46 dmultu $8,$7 47 48 daddiu $6,$6,-1 49 beq $6,$0,$LC0 50 move $2,$0 # zero cy2 51 52 daddiu $6,$6,-1 53 beq $6,$0,$LC1 54 ld $8,0($5) # load new s1 limb as early as possible 55 56Loop: mflo $10 57 mfhi $9 58 daddiu $5,$5,8 59 daddu $10,$10,$2 # add old carry limb to low product limb 60 dmultu $8,$7 61 ld $8,0($5) # load new s1 limb as early as possible 62 daddiu $6,$6,-1 # decrement loop counter 63 sltu $2,$10,$2 # carry from previous addition -> $2 64 sd $10,0($4) 65 daddiu $4,$4,8 66 bne $6,$0,Loop 67 daddu $2,$9,$2 # add high product limb and carry from addition 68 69/* # cool down phase 1 */ 70$LC1: mflo $10 71 mfhi $9 72 daddu $10,$10,$2 73 sltu $2,$10,$2 74 dmultu $8,$7 75 sd $10,0($4) 76 daddiu $4,$4,8 77 daddu $2,$9,$2 # add high product limb and carry from addition 78 79/* # cool down phase 0 */ 80$LC0: mflo $10 81 mfhi $9 82 daddu $10,$10,$2 83 sltu $2,$10,$2 84 sd $10,0($4) 85 j $31 86 daddu $2,$9,$2 # add high product limb and carry from addition 87 88 .end _gcry_mpih_mul_1 89 90