early-access version 1432

externals/ffmpeg/libavcodec/tests/mathops.c

@@ -0,0 +1,41 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/mathops.h"
+
+#include <stdlib.h>
+
+int main(void)
+{
+    unsigned u;
+
+    for(u=0; u<65536; u++) {
+        unsigned s = u*u;
+        unsigned root = ff_sqrt(s);
+        unsigned root_m1 = ff_sqrt(s-1);
+        if (s && root != u) {
+            fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);
+            return 1;
+        }
+        if (u && root_m1 != u - 1) {
+            fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);
+            return 1;
+        }
+    }
+    return 0;
+}