added cuda examples

examples_cuda/perfbench/perfbench_serial.cpp

@@ -0,0 +1,61 @@
+/*
+  Copyright (c) 2012, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+*/
+
+#include <math.h>
+
+void
+xyzSumAOS(float *a, int count, float *zeros, float *result) {
+    float xsum = 0, ysum = 0, zsum = 0;
+    for (int i = 0; i < count; i += 3) {
+        xsum += a[i];
+        ysum += a[i+1];
+        zsum += a[i+2];
+    }
+    result[0] = xsum;
+    result[1] = ysum;
+    result[2] = zsum;
+}
+
+void
+xyzSumSOA(float *a, int count, float *zeros, float *result) {
+    float xsum = 0, ysum = 0, zsum = 0;
+    for (int i = 0; i < count/3; ++i) {
+        float *p = a + (i >> 3) * 24 + (i & 7);
+        xsum += p[0];
+        ysum += p[8];
+        zsum += p[16];
+    }
+    result[0] = xsum;
+    result[1] = ysum;
+    result[2] = zsum;
+}