Added support for some Gen extensions. The idea is mostly to play with Gen

specific hardware and propose simple way to use them. We have three extensions
here:
- Gen register regions. This allows us to perform strided loads in the register
file. To implement that on top of OCL, the idea is to encapsulate them in a
function with a side effect. Not really clean but it works.
- Gen gather from register file. Same idea but here we simply gather data from
a bunch of registers
- Vote any/all. This is basically the same idea as ptx i.e. uniform predicates
for branches.
- block read/write. Just to play with uniform load/store messages

I added a bunch of tests for all that and fix thing here and there to make them
work

1 files changed, 52 insertions, 0 deletions

diff --git a/utests/compiler_array1.cpp b/utests/compiler_array1.cpp
new file mode 100644
index 00000000..fe1ecec3
--- /dev/null
+++ b/utests/compiler_array1.cpp
@@ -0,0 +1,52 @@
+#include "utest_helper.hpp"
+
+static void cpu(int global_id, int *src, int *dst) {
+  int final[16];
+  for (int i = 0; i < 16; ++i) {
+    int array[16];
+    for (int j = 0; j < src[0]; ++j)
+      array[j] = 1+src[0];
+    for (int j = src[0]; j < 16; ++j)
+      array[j] = global_id;
+    final[i] = array[i];
+  }
+  dst[global_id] = final[global_id];
+}
+
+void compiler_array1(void)
+{
+  const size_t n = 16;
+  int cpu_dst[16], cpu_src[16];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("compiler_array1");
+  OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(uint32_t), NULL);
+  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(uint32_t), NULL);
+  OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
+  OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
+  globals[0] = 16;
+  locals[0] = 16;
+
+  // Run random tests
+  for (uint32_t pass = 0; pass < 8; ++pass) {
+    OCL_MAP_BUFFER(0);
+    for (int32_t i = 0; i < (int32_t) n; ++i)
+      cpu_src[i] = ((int32_t*)buf_data[0])[i] = rand() % 16;
+    OCL_UNMAP_BUFFER(0);
+
+    // Run the kernel on GPU
+    OCL_NDRANGE(1);
+
+    // Run on CPU
+    for (int32_t i = 0; i <(int32_t) n; ++i) cpu(i, cpu_src, cpu_dst);
+
+    // Compare
+    OCL_MAP_BUFFER(1);
+    for (int32_t i = 0; i < 11; ++i)
+      OCL_ASSERT(((int32_t*)buf_data[1])[i] == cpu_dst[i]);
+    OCL_UNMAP_BUFFER(1);
+  }
+}
+
+MAKE_UTEST_FROM_FUNCTION(compiler_array1);
+