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Diffstat (limited to 'security/nss/lib/freebl/mpi/mulsqr.c')
-rw-r--r-- | security/nss/lib/freebl/mpi/mulsqr.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/mulsqr.c b/security/nss/lib/freebl/mpi/mulsqr.c new file mode 100644 index 000000000..db2b5ce8a --- /dev/null +++ b/security/nss/lib/freebl/mpi/mulsqr.c @@ -0,0 +1,111 @@ +/* + * Test whether to include squaring code given the current settings + * + * The contents of this file are subject to the Mozilla Public + * License Version 1.1 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS + * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + * implied. See the License for the specific language governing + * rights and limitations under the License. + * + * The Original Code is the MPI Arbitrary Precision Integer Arithmetic + * library. + * + * The Initial Developer of the Original Code is Michael J. Fromberger. + * Portions created by Michael J. Fromberger are + * Copyright (C) 1997, 1998, 1999, 2000 Michael J. Fromberger. + * All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU General Public License Version 2 or later (the + * "GPL"), in which case the provisions of the GPL are applicable + * instead of those above. If you wish to allow use of your + * version of this file only under the terms of the GPL and not to + * allow others to use your version of this file under the MPL, + * indicate your decision by deleting the provisions above and + * replace them with the notice and other provisions required by + * the GPL. If you do not delete the provisions above, a recipient + * may use your version of this file under either the MPL or the GPL. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <limits.h> +#include <time.h> + +#define MP_SQUARE 1 /* make sure squaring code is included */ + +#include "mpi.h" +#include "mpprime.h" + +int main(int argc, char *argv[]) +{ + int ntests, prec, ix; + unsigned int seed; + clock_t start, stop; + double multime, sqrtime; + mp_int a, c; + + seed = (unsigned int)time(NULL); + + if(argc < 3) { + fprintf(stderr, "Usage: %s <ntests> <nbits>\n", argv[0]); + return 1; + } + + if((ntests = abs(atoi(argv[1]))) == 0) { + fprintf(stderr, "%s: must request at least 1 test.\n", argv[0]); + return 1; + } + if((prec = abs(atoi(argv[2]))) < CHAR_BIT) { + fprintf(stderr, "%s: must request at least %d bits.\n", argv[0], + CHAR_BIT); + return 1; + } + + prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT; + + mp_init_size(&a, prec); + mp_init_size(&c, 2 * prec); + + /* Test multiplication by self */ + srand(seed); + start = clock(); + for(ix = 0; ix < ntests; ix++) { + mpp_random_size(&a, prec); + mp_mul(&a, &a, &c); + } + stop = clock(); + + multime = (double)(stop - start) / CLOCKS_PER_SEC; + + /* Test squaring */ + srand(seed); + start = clock(); + for(ix = 0; ix < ntests; ix++) { + mpp_random_size(&a, prec); + mp_sqr(&a, &c); + } + stop = clock(); + + sqrtime = (double)(stop - start) / CLOCKS_PER_SEC; + + printf("Multiply: %.4f\n", multime); + printf("Square: %.4f\n", sqrtime); + if(multime < sqrtime) { + printf("Speedup: %.1f%%\n", 100.0 * (1.0 - multime / sqrtime)); + printf("Prefer: multiply\n"); + } else { + printf("Speedup: %.1f%%\n", 100.0 * (1.0 - sqrtime / multime)); + printf("Prefer: square\n"); + } + + mp_clear(&a); mp_clear(&c); + return 0; + +} |