1 files changed, 47 insertions, 0 deletions
diff --git a/utests/builtin_sign.cpp b/utests/builtin_sign.cpp
new file mode 100644
index 00000000..426de360
--- /dev/null
+++ b/utests/builtin_sign.cpp
@@ -0,0 +1,47 @@
+#include <cmath>
+#include "utest_helper.hpp"
+
+void builtin_sign(void)
+{
+  const int n = 32;
+  float src[n];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("builtin_sign");
+  OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(float), NULL);
+  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
+  OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
+  OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
+  globals[0] = n;
+  locals[0] = 16;
+
+  OCL_MAP_BUFFER(0);
+  src[0] = ((float*)buf_data[0])[0] = nanf("");
+  src[1] = ((float*)buf_data[0])[1] = INFINITY;
+  src[2] = ((float*)buf_data[0])[2] = 0.f;
+  src[3] = ((float*)buf_data[0])[3] = -0.f;
+  for (int i = 4; i < n; ++i) {
+    src[i] = ((float*)buf_data[0])[i] = (rand() & 15) * 0.1 - 0.75;
+  }
+  OCL_UNMAP_BUFFER(0);
+
+  OCL_NDRANGE(1);
+
+  OCL_MAP_BUFFER(1);
+  float *dst = (float*)buf_data[1];
+  OCL_ASSERT(dst[0] == 0);
+  OCL_ASSERT(dst[1] == 1.f);
+  OCL_ASSERT(dst[2] == 0.f);
+  OCL_ASSERT(dst[3] == -0.f);
+  for (int i = 4; i < n; ++i) {
+    if (src[i] == 0.f)
+      OCL_ASSERT(dst[i] == 0.f);
+    else if (src[i] == -0.f)
+      OCL_ASSERT(dst[i] == -0.f);
+    else
+      OCL_ASSERT(dst[i] == (src[i] > 0 ? 1 : -1));
+  }
+  OCL_UNMAP_BUFFER(1);
+}
+
+MAKE_UTEST_FROM_FUNCTION(builtin_sign);