DotProduct

benchmarks/opencl/DotProduct/DotProduct.cl

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+/*
+ * Copyright 1993-2010 NVIDIA Corporation.  All rights reserved.
+ *
+ * Please refer to the NVIDIA end user license agreement (EULA) associated
+ * with this source code for terms and conditions that govern your use of
+ * this software. Any use, reproduction, disclosure, or distribution of
+ * this software and related documentation outside the terms of the EULA
+ * is strictly prohibited.
+ *
+ */
+ 
+ __kernel void DotProduct (__global float* a, __global float* b, __global float* c, int iNumElements)
+{
+    // find position in global arrays
+    int iGID = get_global_id(0);
+
+    // bound check (equivalent to the limit on a 'for' loop for standard/serial C code
+    if (iGID >= iNumElements)
+    {   
+        return; 
+    }
+
+    // process 
+    int iInOffset = iGID << 2;
+    c[iGID] = a[iInOffset] * b[iInOffset] 
+               + a[iInOffset + 1] * b[iInOffset + 1]
+               + a[iInOffset + 2] * b[iInOffset + 2]
+               + a[iInOffset + 3] * b[iInOffset + 3];
+}