1/* alpha add_n -- Add two limb vectors of the same length > 0 and store 2 * sum in a third limb vector. 3 * Copyright (C) 1995, 1998, 2001, 2002 Free Software Foundation, Inc. 4 * 5 * This file is part of Libgcrypt. 6 * 7 * Libgcrypt is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU Lesser General Public License as 9 * published by the Free Software Foundation; either version 2.1 of 10 * the License, or (at your option) any later version. 11 * 12 * Libgcrypt is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 20 */ 21 22 23 24/******************* 25 * mpi_limb_t 26 * _gcry_mpih_add_n( mpi_ptr_t res_ptr, ($16) 27 * mpi_ptr_t s1_ptr, ($17) 28 * mpi_ptr_t s2_ptr, ($18) 29 * mpi_size_t size) ($19) 30 */ 31 32 33 .set noreorder 34 .set noat 35.text 36 .align 3 37 .globl _gcry_mpih_add_n 38 .ent _gcry_mpih_add_n 39_gcry_mpih_add_n: 40 .frame $30,0,$26,0 41 42 ldq $3,0($17) 43 ldq $4,0($18) 44 45 subq $19,1,$19 46 and $19,4-1,$2 # number of limbs in first loop 47 bis $31,$31,$0 48 beq $2,.L0 # if multiple of 4 limbs, skip first loop 49 50 subq $19,$2,$19 51 52.Loop0: subq $2,1,$2 53 ldq $5,8($17) 54 addq $4,$0,$4 55 ldq $6,8($18) 56 cmpult $4,$0,$1 57 addq $3,$4,$4 58 cmpult $4,$3,$0 59 stq $4,0($16) 60 or $0,$1,$0 61 62 addq $17,8,$17 63 addq $18,8,$18 64 bis $5,$5,$3 65 bis $6,$6,$4 66 addq $16,8,$16 67 bne $2,.Loop0 68 69.L0: beq $19,.Lend 70 71 .align 3 72.Loop: subq $19,4,$19 73 74 ldq $5,8($17) 75 addq $4,$0,$4 76 ldq $6,8($18) 77 cmpult $4,$0,$1 78 addq $3,$4,$4 79 cmpult $4,$3,$0 80 stq $4,0($16) 81 or $0,$1,$0 82 83 ldq $3,16($17) 84 addq $6,$0,$6 85 ldq $4,16($18) 86 cmpult $6,$0,$1 87 addq $5,$6,$6 88 cmpult $6,$5,$0 89 stq $6,8($16) 90 or $0,$1,$0 91 92 ldq $5,24($17) 93 addq $4,$0,$4 94 ldq $6,24($18) 95 cmpult $4,$0,$1 96 addq $3,$4,$4 97 cmpult $4,$3,$0 98 stq $4,16($16) 99 or $0,$1,$0 100 101 ldq $3,32($17) 102 addq $6,$0,$6 103 ldq $4,32($18) 104 cmpult $6,$0,$1 105 addq $5,$6,$6 106 cmpult $6,$5,$0 107 stq $6,24($16) 108 or $0,$1,$0 109 110 addq $17,32,$17 111 addq $18,32,$18 112 addq $16,32,$16 113 bne $19,.Loop 114 115.Lend: addq $4,$0,$4 116 cmpult $4,$0,$1 117 addq $3,$4,$4 118 cmpult $4,$3,$0 119 stq $4,0($16) 120 or $0,$1,$0 121 ret $31,($26),1 122 123 .end _gcry_mpih_add_n 124 125