[FFmpeg-cvslog] avcodec: add mathops test

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed May 20 13:38:01 2015 +0200| [50965e067371a905dca04f5f867d5dd497d85871] | committer: Michael Niedermayer

avcodec: add mathops test

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=50965e067371a905dca04f5f867d5dd497d85871
---

 libavcodec/Makefile  |    1 +
 libavcodec/mathops.c |   26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index e1fd83b..cb88fd1 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -883,6 +883,7 @@ SKIPHEADERS-$(CONFIG_VDA)              += vda.h vda_internal.h
 SKIPHEADERS-$(CONFIG_VDPAU)            += vdpau.h vdpau_internal.h
 
 TESTPROGS = imgconvert                                                  \
+            mathops                                                    \
             options                                                     \
             avfft                                                       \
 
diff --git a/libavcodec/mathops.c b/libavcodec/mathops.c
new file mode 100644
index 0000000..31c8e69
--- /dev/null
+++ b/libavcodec/mathops.c
@@ -0,0 +1,26 @@
+#include "mathops.h"
+
+#ifdef TEST
+
+#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;
+}
+#endif /* TEST */