altos: Add 64-bit add/mul/shift for SDCC

[fw/altos] / src / test / ao_int64_test.c

diff --git a/src/test/ao_int64_test.c b/src/test/ao_int64_test.c
new file mode 100644 (file)
index 0000000..67ba6ec
--- /dev/null
+++ b/src/test/ao_int64_test.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao_int64.h>
+#include <ao_int64.c>
+#include <stdio.h>
+#include <stdlib.h>
+
+int    errors;
+
+#define test(op,func,a,b,ao_a,ao_b) do {                               \
+               r = (a) op (b);                                         \
+               func(&ao_r, ao_a, ao_b);                                \
+               c = ao_cast64(&ao_r);                                   \
+               if (c != r) {                                           \
+                       printf ("trial %4d: %lld " #func " %lld = %lld (should be %lld)\n", \
+                               trial, (int64_t) (a), (int64_t) b, c, r); \
+                       ++errors;                                       \
+               }                                                       \
+       } while (0)
+
+
+void
+do_test(int trial, int64_t a, int64_t b)
+{
+       int64_t r, c;
+       ao_int64_t      ao_a, ao_b, ao_r;
+
+       ao_int64_init64(&ao_a, a >> 32, a);
+       ao_int64_init64(&ao_b, b >> 32, b);
+
+       test(+, ao_plus64, a, b, &ao_a, &ao_b);
+       test(*, ao_mul64,(int64_t) (int32_t) a, (int32_t) b, (int32_t) a, (int32_t) b);
+       test(>>, ao_rshift64, a, (uint8_t) b & 0x3f, &ao_a, (uint8_t) b & 0x3f);
+       test(<<, ao_lshift64, a, (uint8_t) b & 0x3f, &ao_a, (uint8_t) b & 0x3f);
+       test(*, ao_mul64_16, a, (uint16_t) b, &ao_a, (uint16_t) b);
+}
+
+#define TESTS  10000000
+
+static int64_t
+random64(void)
+{
+       return (int64_t) random() + ((int64_t) random() << 31) /* + ((int64_t) random() << 33) */;
+}
+
+int
+main (int argc, char **argv)
+{
+       int     i, start;
+
+       if (argv[1])
+               start = atoi(argv[1]);
+       else
+               start = 0;
+       srandom(1000);
+       for (i = 0; i < TESTS; i++) {
+               int64_t a = random64();
+               int64_t b = random64();
+               if (i >= start)
+                       do_test(i, a, b);
+       }
+       return errors;
+}