1/* MIPS3 addmul_1 -- Multiply a limb vector with a single limb and 2 * add the product to 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_addmul_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_addmul_1 36 .ent _gcry_mpih_addmul_1 37_gcry_mpih_addmul_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: ld $10,0($4) 57 mflo $3 58 mfhi $9 59 daddiu $5,$5,8 60 daddu $3,$3,$2 # add old carry limb to low product limb 61 dmultu $8,$7 62 ld $8,0($5) # load new s1 limb as early as possible 63 daddiu $6,$6,-1 # decrement loop counter 64 sltu $2,$3,$2 # carry from previous addition -> $2 65 daddu $3,$10,$3 66 sltu $10,$3,$10 67 daddu $2,$2,$10 68 sd $3,0($4) 69 daddiu $4,$4,8 70 bne $6,$0,Loop 71 daddu $2,$9,$2 # add high product limb and carry from addition 72 73/* # cool down phase 1 */ 74$LC1: ld $10,0($4) 75 mflo $3 76 mfhi $9 77 daddu $3,$3,$2 78 sltu $2,$3,$2 79 dmultu $8,$7 80 daddu $3,$10,$3 81 sltu $10,$3,$10 82 daddu $2,$2,$10 83 sd $3,0($4) 84 daddiu $4,$4,8 85 daddu $2,$9,$2 # add high product limb and carry from addition 86 87/* # cool down phase 0 */ 88$LC0: ld $10,0($4) 89 mflo $3 90 mfhi $9 91 daddu $3,$3,$2 92 sltu $2,$3,$2 93 daddu $3,$10,$3 94 sltu $10,$3,$10 95 daddu $2,$2,$10 96 sd $3,0($4) 97 j $31 98 daddu $2,$9,$2 # add high product limb and carry from addition 99 100 .end _gcry_mpih_addmul_1 101 102