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Merged VectorAdd fixes from trunk.

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the_fiddler 2009-10-28 15:59:46 +00:00
parent 7df7f1e392 7fbfd334c2
commit e790b327ee
1 changed files with 17 additions and 5 deletions
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22
Source/Examples/OpenCL/VectorAdd.cs
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@ -17,7 +17,7 @@ namespace Examples
{ {
public static void Main() public static void Main()
{ {
const int cnBlockSize = 512; const int cnBlockSize = 4;
const int cnBlocks = 3; const int cnBlocks = 3;
IntPtr cnDimension = new IntPtr(cnBlocks * cnBlockSize); IntPtr cnDimension = new IntPtr(cnBlocks * cnBlockSize);
string sProgramSource = @" string sProgramSource = @"
@ -66,8 +66,12 @@ vectorAdd(__global const float * a,
float[] B = new float[cnDimension.ToInt32()]; float[] B = new float[cnDimension.ToInt32()];
float[] C = new float[cnDimension.ToInt32()]; float[] C = new float[cnDimension.ToInt32()];
// initialize host memory // initialize host memory
// randomInit(pA, cnDimension); Random rand = new Random();
//randomInit(pB, cnDimension); for (int i = 0; i < A.Length; i++)
{
A[i] = rand.Next() % 256;
B[i] = rand.Next() % 256;
}
// allocate device memory // allocate device memory
unsafe unsafe
@ -107,11 +111,19 @@ vectorAdd(__global const float * a,
new IntPtr(pB), 0, null, (IntPtr[])null); new IntPtr(pB), 0, null, (IntPtr[])null);
// execute kernel // execute kernel
CL.EnqueueNDRangeKernel(hCmdQueue, hKernel, 1, null, &cnDimension, null, 0, null, null); error = (ErrorCode)CL.EnqueueNDRangeKernel(hCmdQueue, hKernel, 1, null, &cnDimension, null, 0, null, null);
if (error != ErrorCode.Success)
throw new Exception(error.ToString());
// copy results from device back to host // copy results from device back to host
CL.EnqueueReadBuffer(hCmdQueue, hDeviceMemC, true, IntPtr.Zero, IntPtr event_handle = IntPtr.Zero;
error = (ErrorCode)CL.EnqueueReadBuffer(hCmdQueue, hDeviceMemC, true, IntPtr.Zero,
new IntPtr(cnDimension.ToInt32() * sizeof(float)), new IntPtr(cnDimension.ToInt32() * sizeof(float)),
new IntPtr(pC), 0, null, (IntPtr[])null); new IntPtr(pC), 0, null, (IntPtr[])null);
if (error != ErrorCode.Success)
throw new Exception(error.ToString());
CL.Finish(hCmdQueue);
CL.ReleaseMemObject(hDeviceMemA); CL.ReleaseMemObject(hDeviceMemA);
CL.ReleaseMemObject(hDeviceMemB); CL.ReleaseMemObject(hDeviceMemB);