[Beignet] [PATCH 2/2] test function "smoothstep"

[Homer Hsing]

Signed-off-by: Homer Hsing <homer.xing at intel.com>
---
 kernels/compiler_smoothstep.cl |  4 +++
 utests/CMakeLists.txt          |  1 +
 utests/compiler_smoothstep.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)
 create mode 100644 kernels/compiler_smoothstep.cl
 create mode 100644 utests/compiler_smoothstep.cpp

diff --git a/kernels/compiler_smoothstep.cl b/kernels/compiler_smoothstep.cl
new file mode 100644
index 0000000..d3b7da4
--- /dev/null
+++ b/kernels/compiler_smoothstep.cl
@@ -0,0 +1,4 @@
+kernel void compiler_smoothstep(global float *src1, global float *src2, global float *src3, global float *dst) {
+  int i = get_global_id(0);
+  dst[i] = smoothstep(src1[i], src2[i], src3[i]);
+}
diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
index 621acad..26c0540 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -67,6 +67,7 @@ set (utests_sources
   compiler_saturate_sub.cpp
   compiler_shift_right.cpp
   compiler_short_scatter.cpp
+  compiler_smoothstep.cpp
   compiler_uint2_copy.cpp
   compiler_uint3_copy.cpp
   compiler_uint8_copy.cpp
diff --git a/utests/compiler_smoothstep.cpp b/utests/compiler_smoothstep.cpp
new file mode 100644
index 0000000..760063b
--- /dev/null
+++ b/utests/compiler_smoothstep.cpp
@@ -0,0 +1,58 @@
+#include <cmath>
+#include "utest_helper.hpp"
+
+float cpu(float e0, float e1, float x)
+{
+  x = (x - e0) / (e1 - e0);
+  if (x >= 1)
+    x = 1.f;
+  if (x <= 0)
+    x = 0.f;
+  return x * x * (3 - 2 * x);
+}
+
+void compiler_smoothstep(void)
+{
+  const int n = 32;
+  float src1[n], src2[n], src3[n];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("compiler_smoothstep");
+  OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(float), NULL);
+  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
+  OCL_CREATE_BUFFER(buf[2], 0, n * sizeof(float), NULL);
+  OCL_CREATE_BUFFER(buf[3], 0, n * sizeof(float), NULL);
+  OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
+  OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
+  OCL_SET_ARG(2, sizeof(cl_mem), &buf[2]);
+  OCL_SET_ARG(3, sizeof(cl_mem), &buf[3]);
+  globals[0] = n;
+  locals[0] = 16;
+
+  OCL_MAP_BUFFER(0);
+  OCL_MAP_BUFFER(1);
+  OCL_MAP_BUFFER(2);
+  for (int i = 0; i < n; ++i) {
+    float a = 0.1f * (rand() & 15) - 0.75f;
+    float b = a + 0.1f * (rand() & 15);
+    float c = 0.1f * (rand() & 15) - 0.75f;
+    src1[i] = ((float*)buf_data[0])[i] = a;
+    src2[i] = ((float*)buf_data[1])[i] = b;
+    src3[i] = ((float*)buf_data[2])[i] = c;
+  }
+  OCL_UNMAP_BUFFER(0);
+  OCL_UNMAP_BUFFER(1);
+  OCL_UNMAP_BUFFER(2);
+
+  OCL_NDRANGE(1);
+
+  OCL_MAP_BUFFER(3);
+  for (int i = 0; i < n; ++i) {
+    float a = ((float*)buf_data[3])[i];
+    float b = cpu(src1[i], src2[i], src3[i]);
+    OCL_ASSERT(fabsf(a - b) < 1e-4f);
+  }
+  OCL_UNMAP_BUFFER(3);
+}
+
+MAKE_UTEST_FROM_FUNCTION(compiler_smoothstep);
-- 
1.8.1.2