1 files changed, 123 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/tests/mptest-3a.c b/security/nss/lib/freebl/mpi/tests/mptest-3a.c
new file mode 100644
index 000000000..c6cea7046
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/tests/mptest-3a.c
@@ -0,0 +1,123 @@
+/*
+ * Simple test driver for MPI library
+ *
+ * Test 3a: Multiplication vs. squaring timing test
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+
+#include <time.h>
+
+#include "mpi.h"
+#include "mpprime.h"
+
+int
+main(int argc, char *argv[])
+{
+    int ix, num, prec = 8;
+    double d1, d2;
+    clock_t start, finish;
+    time_t seed;
+    mp_int a, c, d;
+
+    seed = time(NULL);
+
+    if (argc < 2) {
+        fprintf(stderr, "Usage: %s <num-tests> [<precision>]\n", argv[0]);
+        return 1;
+    }
+
+    if ((num = atoi(argv[1])) < 0)
+        num = -num;
+
+    if (!num) {
+        fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]);
+        return 1;
+    }
+
+    if (argc > 2) {
+        if ((prec = atoi(argv[2])) <= 0)
+            prec = 8;
+        else
+            prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT;
+    }
+
+    printf("Test 3a: Multiplication vs squaring timing test\n"
+           "Precision:  %d digits (%u bits)\n"
+           "# of tests: %d\n\n",
+           prec, prec * DIGIT_BIT, num);
+
+    mp_init_size(&a, prec);
+
+    mp_init(&c);
+    mp_init(&d);
+
+    printf("Verifying accuracy ... \n");
+    srand((unsigned int)seed);
+    for (ix = 0; ix < num; ix++) {
+        mpp_random_size(&a, prec);
+        mp_mul(&a, &a, &c);
+        mp_sqr(&a, &d);
+
+        if (mp_cmp(&c, &d) != 0) {
+            printf("Error!  Results not accurate:\n");
+            printf("a = ");
+            mp_print(&a, stdout);
+            fputc('\n', stdout);
+            printf("c = ");
+            mp_print(&c, stdout);
+            fputc('\n', stdout);
+            printf("d = ");
+            mp_print(&d, stdout);
+            fputc('\n', stdout);
+            mp_sub(&c, &d, &d);
+            printf("dif ");
+            mp_print(&d, stdout);
+            fputc('\n', stdout);
+            mp_clear(&c);
+            mp_clear(&d);
+            mp_clear(&a);
+            return 1;
+        }
+    }
+    printf("Accuracy is confirmed for the %d test samples\n", num);
+    mp_clear(&d);
+
+    printf("Testing squaring ... \n");
+    srand((unsigned int)seed);
+    start = clock();
+    for (ix = 0; ix < num; ix++) {
+        mpp_random_size(&a, prec);
+        mp_sqr(&a, &c);
+    }
+    finish = clock();
+
+    d2 = (double)(finish - start) / CLOCKS_PER_SEC;
+
+    printf("Testing multiplication ... \n");
+    srand((unsigned int)seed);
+    start = clock();
+    for (ix = 0; ix < num; ix++) {
+        mpp_random(&a);
+        mp_mul(&a, &a, &c);
+    }
+    finish = clock();
+
+    d1 = (double)(finish - start) / CLOCKS_PER_SEC;
+
+    printf("Multiplication time: %.3f sec (%.3f each)\n", d1, d1 / num);
+    printf("Squaring time:       %.3f sec (%.3f each)\n", d2, d2 / num);
+    printf("Improvement:         %.2f%%\n", (1.0 - (d2 / d1)) * 100.0);
+
+    mp_clear(&c);
+    mp_clear(&a);
+
+    return 0;
+}