[Beignet] [PATCH] utests: added for optimization negtiveAdd

[rander.wang]

	the negtive Add is like:
	exp -a

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

Signed-off-by: rander.wang <rander.wang at intel.com>
---
 kernels/compiler_remove_negtiveAdd.cl |  4 ++++
 utests/CMakeLists.txt                 |  3 ++-
 utests/compiler_remove_negtiveAdd.cpp | 40 +++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 kernels/compiler_remove_negtiveAdd.cl
 create mode 100644 utests/compiler_remove_negtiveAdd.cpp

diff --git a/kernels/compiler_remove_negtiveAdd.cl b/kernels/compiler_remove_negtiveAdd.cl
new file mode 100644
index 0000000..92799db
--- /dev/null
+++ b/kernels/compiler_remove_negtiveAdd.cl
@@ -0,0 +1,4 @@
+kernel void compiler_remove_negtiveAdd(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 ae9e2bd..8967389 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -301,7 +301,8 @@ set (utests_sources
   runtime_pipe_query.cpp
   compiler_pipe_builtin.cpp
   compiler_device_enqueue.cpp
-  compiler_sqrtDiv.cpp)
+  compiler_sqrtDiv.cpp
+  compiler_remove_negtiveAdd.cpp)
 
 if (LLVM_VERSION_NODOT VERSION_GREATER 34)
   SET(utests_sources
diff --git a/utests/compiler_remove_negtiveAdd.cpp b/utests/compiler_remove_negtiveAdd.cpp
new file mode 100644
index 0000000..335ba43
--- /dev/null
+++ b/utests/compiler_remove_negtiveAdd.cpp
@@ -0,0 +1,40 @@
+#include <cmath>
+#include "utest_helper.hpp"
+
+void compiler_remove_negtiveAdd(void) {
+	const int n = 1024;
+	float src[n];
+
+	// Setup kernel and buffers
+	OCL_CREATE_KERNEL("compiler_remove_negtiveAdd");
+	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_negtiveAdd);
-- 
2.7.4