utests: added for optimization negativeAdd

the negative Add is like:
exp -a

llvm transfer it to:
add x -a, 0
exp x

Signed-off-by: rander.wang <rander.wang@intel.com>
Reviewed-by: Pan Xiuli <xiuli.pan@intel.com>

3 files changed, 46 insertions, 1 deletions

diff --git a/kernels/compiler_remove_negative_add.cl b/kernels/compiler_remove_negative_add.cl
new file mode 100644
index 00000000..d6f72706
--- /dev/null
+++ b/kernels/compiler_remove_negative_add.cl
@@ -0,0 +1,4 @@
+kernel void compiler_remove_negative_add(global float *src, global float *dst) {
+  int i = get_global_id(0);
+  dst[i] = exp2(-src[i]);
+};
diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
index f8abd457..afef07fc 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -304,7 +304,8 @@ set (utests_sources
   runtime_pipe_query.cpp
   compiler_pipe_builtin.cpp
   compiler_device_enqueue.cpp
-  compiler_sqrt_div.cpp)
+  compiler_sqrt_div.cpp
+  compiler_remove_negative_add.cpp)
 
 if (LLVM_VERSION_NODOT VERSION_GREATER 34)
   SET(utests_sources
diff --git a/utests/compiler_remove_negative_add.cpp b/utests/compiler_remove_negative_add.cpp
new file mode 100644
index 00000000..2b5df731
--- /dev/null
+++ b/utests/compiler_remove_negative_add.cpp
@@ -0,0 +1,40 @@
+#include "utest_helper.hpp"
+#include <cmath>
+
+void compiler_remove_negative_add(void) {
+  const int n = 1024;
+  float src[n];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("compiler_remove_negative_add");
+  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 = exp2(-src[i]);
+      float gpu = dst[i];
+      if (fabsf(cpu - gpu) >= 1e-3) {
+        printf("%f %f %f", src[i], cpu, gpu);
+        OCL_ASSERT(0);
+      }
+    }
+    OCL_UNMAP_BUFFER(1);
+  }
+}
+
+MAKE_UTEST_FROM_FUNCTION(compiler_remove_negative_add);