add built-in function "tgamma"

also include a test case

Signed-off-by: Homer Hsing <homer.xing@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/utests/builtin_tgamma.cpp b/utests/builtin_tgamma.cpp
new file mode 100644
index 00000000..4c824d03
--- /dev/null
+++ b/utests/builtin_tgamma.cpp
@@ -0,0 +1,42 @@
+#include <cmath>
+#include "utest_helper.hpp"
+
+void builtin_tgamma(void)
+{
+  const int n = 1024;
+  float src[n];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("builtin_tgamma");
+  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;
+
+  for (int j = 0; j < 1024; j ++) {
+    OCL_MAP_BUFFER(0);
+    for (int i = 0; i < n; ++i) {
+      src[i] = ((float*)buf_data[0])[i] = (j*n+i+1) * 0.001f;
+    }
+    OCL_UNMAP_BUFFER(0);
+
+    OCL_NDRANGE(1);
+
+    OCL_MAP_BUFFER(1);
+    float *dst = (float*)buf_data[1];
+    for (int i = 0; i < n; ++i) {
+      float cpu = gammaf(src[i]);
+      if (isinf(cpu)) {
+        OCL_ASSERT(isinf(dst[i]));
+      } else if (fabsf(cpu - dst[i]) >= 1e-3) {
+        printf("%f %f %f\n", src[i], cpu, dst[i]);
+        OCL_ASSERT(0);
+      }
+    }
+    OCL_UNMAP_BUFFER(1);
+  }
+}
+
+MAKE_UTEST_FROM_FUNCTION(builtin_tgamma);