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smg_comms_c_wrappers    1 /* mpihelp-sub.c  -  MPI helper functions
smg_comms_c_wrappers 2 * Modified by No Such Labs. (C) 2015. See README.
smg_comms_c_wrappers 3 *
smg_comms_c_wrappers 4 * This file was originally part of Gnu Privacy Guard (GPG), ver. 1.4.10,
smg_comms_c_wrappers 5 * SHA256(gnupg-1.4.10.tar.gz):
smg_comms_c_wrappers 6 * 0bfd74660a2f6cedcf7d8256db4a63c996ffebbcdc2cf54397bfb72878c5a85a
smg_comms_c_wrappers 7 * (C) 1994-2005 Free Software Foundation, Inc.
smg_comms_c_wrappers 8 *
smg_comms_c_wrappers 9 * This program is free software: you can redistribute it and/or modify
smg_comms_c_wrappers 10 * it under the terms of the GNU General Public License as published by
smg_comms_c_wrappers 11 * the Free Software Foundation, either version 3 of the License, or
smg_comms_c_wrappers 12 * (at your option) any later version.
smg_comms_c_wrappers 13 *
smg_comms_c_wrappers 14 * This program is distributed in the hope that it will be useful,
smg_comms_c_wrappers 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
smg_comms_c_wrappers 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
smg_comms_c_wrappers 17 * GNU General Public License for more details.
smg_comms_c_wrappers 18 *
smg_comms_c_wrappers 19 * You should have received a copy of the GNU General Public License
smg_comms_c_wrappers 20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
smg_comms_c_wrappers 21 */
smg_comms_c_wrappers 22
smg_comms_c_wrappers 23 #include <stdio.h>
smg_comms_c_wrappers 24 #include <stdlib.h>
smg_comms_c_wrappers 25
smg_comms_c_wrappers 26 #include "knobs.h"
smg_comms_c_wrappers 27 #include "mpi-internal.h"
smg_comms_c_wrappers 28
smg_comms_c_wrappers 29 /****************
smg_comms_c_wrappers 30 * Compare OP1_PTR/OP1_SIZE with OP2_PTR/OP2_SIZE.
smg_comms_c_wrappers 31 * There are no restrictions on the relative sizes of
smg_comms_c_wrappers 32 * the two arguments.
smg_comms_c_wrappers 33 * Return 1 if OP1 > OP2, 0 if they are equal, and -1 if OP1 < OP2.
smg_comms_c_wrappers 34 */
smg_comms_c_wrappers 35 int
smg_comms_c_wrappers 36 mpihelp_cmp( mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size )
smg_comms_c_wrappers 37 {
smg_comms_c_wrappers 38 mpi_size_t i;
smg_comms_c_wrappers 39 mpi_limb_t op1_word, op2_word;
smg_comms_c_wrappers 40
smg_comms_c_wrappers 41 for( i = size - 1; i >= 0 ; i--) {
smg_comms_c_wrappers 42 op1_word = op1_ptr[i];
smg_comms_c_wrappers 43 op2_word = op2_ptr[i];
smg_comms_c_wrappers 44 if( op1_word != op2_word )
smg_comms_c_wrappers 45 goto diff;
smg_comms_c_wrappers 46 }
smg_comms_c_wrappers 47 return 0;
smg_comms_c_wrappers 48
smg_comms_c_wrappers 49 diff:
smg_comms_c_wrappers 50 /* This can *not* be simplified to
smg_comms_c_wrappers 51 * op2_word - op2_word
smg_comms_c_wrappers 52 * since that expression might give signed overflow. */
smg_comms_c_wrappers 53 return (op1_word > op2_word) ? 1 : -1;
smg_comms_c_wrappers 54 }
smg_comms_c_wrappers 55