[Beignet] [PATCH 2/2] test built-in function "sign"

[Homer Hsing]

Signed-off-by: Homer Hsing <homer.xing at intel.com>
---
 kernels/builtin_sign.cl |  4 ++++
 utests/CMakeLists.txt   |  1 +
 utests/builtin_sign.cpp | 45 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100644 kernels/builtin_sign.cl
 create mode 100644 utests/builtin_sign.cpp

diff --git a/kernels/builtin_sign.cl b/kernels/builtin_sign.cl
new file mode 100644
index 0000000..ff9a66b
--- /dev/null
+++ b/kernels/builtin_sign.cl
@@ -0,0 +1,4 @@
+kernel void builtin_sign(global float *src, global float *dst) {
+  int i = get_global_id(0);
+  dst[i] = sign(src[i]);
+}
diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
index 1cdbd24..14ff6b1 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -102,6 +102,7 @@ set (utests_sources
   get_cl_info.cpp
   builtin_bitselect.cpp
   builtin_mad_sat.cpp
+  builtin_sign.cpp
   buildin_work_dim.cpp
   builtin_global_size.cpp
   runtime_createcontext.cpp
diff --git a/utests/builtin_sign.cpp b/utests/builtin_sign.cpp
new file mode 100644
index 0000000..7014790
--- /dev/null
+++ b/utests/builtin_sign.cpp
@@ -0,0 +1,45 @@
+#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] = nanf("");
+  src[1] = 0.f;
+  src[2] = -0.f;
+  for (int i = 3; 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] == 0.f);
+  OCL_ASSERT(dst[2] == -0.f);
+  for (int i = 3; 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);
-- 
1.8.1.2