1/* hppa add_n -- Add two limb vectors of the same length > 0 and store 2 * sum in a third limb vector. 3 * 4 * Copyright (C) 1992, 1994, 1998, 5 * 2001, 2002 Fee 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 * Note: This code is heavily based on the GNU MP Library. 24 * Actually it's the same code with only minor changes in the 25 * way the data is stored; this is to support the abstraction 26 * of an optional secure memory allocation which may be used 27 * to avoid revealing of sensitive data due to paging etc. 28 */ 29 30 31 32/******************* 33 * mpi_limb_t 34 * _gcry_mpih_add_n( mpi_ptr_t res_ptr, (gr26) 35 * mpi_ptr_t s1_ptr, (gr25) 36 * mpi_ptr_t s2_ptr, (gr24) 37 * mpi_size_t size) (gr23) 38 * 39 * One might want to unroll this as for other processors, but it turns 40 * out that the data cache contention after a store makes such 41 * unrolling useless. We can't come under 5 cycles/limb anyway. 42 */ 43 44 .code 45 .export _gcry_mpih_add_n 46 .label _gcry_mpih_add_n 47 .proc 48 .callinfo frame=0,no_calls 49 .entry 50 51 ldws,ma 4(0,%r25),%r20 52 ldws,ma 4(0,%r24),%r19 53 54 addib,= -1,%r23,L$end ; check for (SIZE == 1) 55 add %r20,%r19,%r28 ; add first limbs ignoring cy 56 57 .label L$loop 58 ldws,ma 4(0,%r25),%r20 59 ldws,ma 4(0,%r24),%r19 60 stws,ma %r28,4(0,%r26) 61 addib,<> -1,%r23,L$loop 62 addc %r20,%r19,%r28 63 64 .label L$end 65 stws %r28,0(0,%r26) 66 bv 0(%r2) 67 addc %r0,%r0,%r28 68 69 .exit 70 .procend 71