[Beignet] [PATCH] GBE: enable double vector load/store support.

[Zhigang Gong]

We have some accurate problem for double calculation
on GPU side. I have to change the test case for double
type to add a tolerate error when check the double
data result.

Signed-off-by: Zhigang Gong <zhigang.gong at linux.intel.com>
---
 backend/src/llvm/llvm_gen_backend.cpp |    2 --
 backend/src/ocl_stdlib.tmpl.h         |    1 +
 kernels/compiler_vector_load_store.cl |    6 +++---
 utests/compiler_vector_load_store.cpp |   12 ++++++++----
 4 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/backend/src/llvm/llvm_gen_backend.cpp b/backend/src/llvm/llvm_gen_backend.cpp
index b5963ad..18448cf 100644
--- a/backend/src/llvm/llvm_gen_backend.cpp
+++ b/backend/src/llvm/llvm_gen_backend.cpp
@@ -2371,8 +2371,6 @@ namespace gbe
     // Scalar is easy. We neednot build register tuples
     if (isScalarType(llvmType) == true) {
       const ir::Type type = getType(ctx, llvmType);
-      //if(type == ir::TYPE_DOUBLE) // 64bit-float load(store) don't support SIMD16
-      //  OCL_SIMD_WIDTH = 8;
       const ir::Register values = this->getRegister(llvmValues);
       if (isLoad)
         ctx.LOAD(type, ptr, addrSpace, dwAligned, values);
diff --git a/backend/src/ocl_stdlib.tmpl.h b/backend/src/ocl_stdlib.tmpl.h
index c9e54e2..548c96f 100644
--- a/backend/src/ocl_stdlib.tmpl.h
+++ b/backend/src/ocl_stdlib.tmpl.h
@@ -955,6 +955,7 @@ DECL_UNTYPED_RW_ALL(uint)
 DECL_UNTYPED_RW_ALL(long)
 DECL_UNTYPED_RW_ALL(ulong)
 DECL_UNTYPED_RW_ALL(float)
+DECL_UNTYPED_RW_ALL(double)
 
 #undef DECL_UNTYPED_RW_ALL
 #undef DECL_UNTYPED_RW_ALL_SPACE
diff --git a/kernels/compiler_vector_load_store.cl b/kernels/compiler_vector_load_store.cl
index 30f0e1e..320194e 100644
--- a/kernels/compiler_vector_load_store.cl
+++ b/kernels/compiler_vector_load_store.cl
@@ -1,5 +1,5 @@
 /* test OpenCL 1.1 Vector Data Load/Store Functions (section 6.11.7) */
-
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
 #define OFFSET2(type)  (type ##2) {(type)1, (type)2}
 #define OFFSET3(type)  (type ##3) {(type)1, (type)2, (type)3}
 #define OFFSET4(type)  (type ##4) {(type)1, (type)2, (type)3, (type)4}
@@ -24,10 +24,10 @@ __kernel void test_##type ##n(__global type *pin, \
   TEST_TYPE(ushort,n)\
   TEST_TYPE(int,n)   \
   TEST_TYPE(uint,n)  \
-  TEST_TYPE(float,n)
+  TEST_TYPE(float,n) \
+  TEST_TYPE(double,n)
 
 #if 0
-  TEST_TYPE(double,n)
   TEST_TYPE(long,n)
   TEST_TYPE(ulong,n)
   TEST_TYPE(half,n)
diff --git a/utests/compiler_vector_load_store.cpp b/utests/compiler_vector_load_store.cpp
index 79f284f..7deb7cb 100644
--- a/utests/compiler_vector_load_store.cpp
+++ b/utests/compiler_vector_load_store.cpp
@@ -1,4 +1,5 @@
 #include "utest_helper.hpp"
+#include <string.h>
 template<typename T>
 static void compiler_vector_load_store(int elemNum, const char *kernelName)
 {
@@ -9,8 +10,8 @@ static void compiler_vector_load_store(int elemNum, const char *kernelName)
   buf_data[0] = (T*) malloc(sizeof(T) * n);
   for (uint32_t i = 0; i < n; ++i)
     ((T*)buf_data[0])[i] = i;
-  OCL_CREATE_BUFFER(buf[0], CL_MEM_COPY_HOST_PTR, n * sizeof(float), buf_data[0]);
-  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
+  OCL_CREATE_BUFFER(buf[0], CL_MEM_COPY_HOST_PTR, n * sizeof(T), buf_data[0]);
+  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(T), NULL);
   free(buf_data[0]);
   buf_data[0] = NULL;
 
@@ -27,7 +28,10 @@ static void compiler_vector_load_store(int elemNum, const char *kernelName)
   for (uint32_t i = 0; i < n; ++i)
   {
     int shift = ((i % elemNum) + 1);
-    OCL_ASSERT(((T*)buf_data[1])[i] == (T)(((T*)buf_data[0])[i] + shift));
+    if (strstr(kernelName, "double") == NULL)
+      OCL_ASSERT(((T*)buf_data[1])[i] == (T)(((T*)buf_data[0])[i] + shift));
+    else
+      OCL_ASSERT((((T*)buf_data[1])[i] - ((T)((T*)buf_data[0])[i] + shift)) < 1e-5);
   }
   OCL_UNMAP_BUFFER(0);
   OCL_UNMAP_BUFFER(1);
@@ -54,6 +58,6 @@ test_all_vector(uint16_t, ushort)
 test_all_vector(int32_t, int)
 test_all_vector(uint32_t, uint)
 test_all_vector(float, float)
-//test_all_vector(double, double)
+test_all_vector(double, double)
 //test_all_vector(int64_t, long)
 //test_all_vector(uint64_t, ulong)
-- 
1.7.9.5