1 files changed, 32 insertions, 0 deletions
diff --git a/src/gallium/tests/unit/u_half_test.c b/src/gallium/tests/unit/u_half_test.c
new file mode 100644
index 0000000000..00bda7f50a
--- /dev/null
+++ b/src/gallium/tests/unit/u_half_test.c
@@ -0,0 +1,32 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <float.h>
+
+#include "util/u_math.h"
+#include "util/u_half.h"
+
+int
+main(int argc, char **argv)
+{
+   unsigned i;
+   unsigned roundtrip_fails = 0;
+   for(i = 0; i < 1 << 16; ++i)
+   {
+      uint16_t h = (uint16_t) i;
+      union fi f;
+      uint16_t rh;
+      f.ui = util_half_to_floatui(h);
+      rh = util_floatui_to_half(f.ui);
+      if(h != rh)
+      {
+	 printf("Roundtrip failed: %x -> %x = %f -> %x\n", h, f.ui, f.f, rh);
+	 ++roundtrip_fails;
+      }
+   }
+
+   if(roundtrip_fails)
+      printf("Failure! %u/65536 half floats failed a conversion to float and back.\n", roundtrip_fails);
+   else
+      printf("Success!\n");
+   return 0;
+}