import opencl_course source for a start

opencl/vector_add_simplified/main.cpp

@@ -0,0 +1,69 @@
+///original author: Erwin Coumans
+#include "btOpenCLUtils.h"
+#include "../parallel_primitives/host/btOpenCLArray.h"
+#include "../parallel_primitives/host/btLauncherCL.h"
+#include <stdio.h>
+
+
+#define MSTRINGIFY(A) #A
+const char* kernelString= MSTRINGIFY(
+__kernel void VectorAdd(__global const float* a, __global const float* b, __global float* c, int numElements)
+{
+  int iGID = get_global_id(0);
+	if (iGID>=numElements)
+		return;
+	float aGID = a[iGID];
+	float bGID = b[iGID];
+	float result = aGID + bGID;
+    c[iGID] = result;
+}
+);
+
+int main(int argc, char* argv[])
+{
+	int ciErrNum = 0;
+	int preferred_device = -1;
+	int preferred_platform = -1;
+	cl_platform_id		platformId;
+	cl_context			ctx;
+	cl_command_queue	queue;
+	cl_device_id		device;
+	cl_kernel			addKernel;
+	ctx = btOpenCLUtils::createContextFromType(CL_DEVICE_TYPE_GPU, &ciErrNum,0,0,preferred_device,preferred_platform,&platformId);
+	btOpenCLUtils::printPlatformInfo(platformId);
+	oclCHECKERROR(ciErrNum, CL_SUCCESS);
+	if (!ctx) {
+		printf("No OpenCL capable GPU found!");
+		return 0;
+	}
+
+	device = btOpenCLUtils::getDevice(ctx,0);
+	queue = clCreateCommandQueue(ctx, device, 0, &ciErrNum);
+	addKernel = btOpenCLUtils::compileCLKernelFromString(ctx,device,kernelString,"VectorAdd",&ciErrNum);
+	oclCHECKERROR(ciErrNum, CL_SUCCESS);
+	int numElements = 32;
+	btOpenCLArray<float> a(ctx,queue);
+	btOpenCLArray<float> b(ctx,queue);
+	btOpenCLArray<float> c(ctx,queue);
+	for (int i=0;i<numElements;i++)
+	{
+		a.push_back(float(i));
+		b.push_back(float(i));
+	}
+	
+	c.resize(numElements);
+	btLauncherCL launcher( queue, addKernel);
+	launcher.setBuffer( a.getBufferCL());
+	launcher.setBuffer( b.getBufferCL());
+	launcher.setBuffer( c.getBufferCL());
+	launcher.setConst(  numElements );
+	launcher.launch1D( numElements);
+	for (int i=0;i<numElements;i++)
+	{
+		float v = c.at(i);
+		printf("c[%d]=%f\n",i,v);
+	}
+	clReleaseCommandQueue(queue);
+	clReleaseContext(ctx);
+	return 0;
+}

opencl/vector_add_simplified/premake4.lua

@@ -0,0 +1,37 @@
+
+function createProject (vendor)
+
+	local hasCL = findOpenCL(vendor)
+	
+	if (hasCL) then
+
+		project ( "OpenCL_vector_add_simplified_" .. vendor)
+
+		initOpenCL(vendor)
+	
+		language "C++"
+				
+		kind "ConsoleApp"
+		targetdir "../../bin"
+
+		links {
+			"OpenCL_lib_parallel_primitives_host_" .. vendor
+		}
+
+		includedirs {
+			"../basic_initialize"
+		}
+		
+		files {
+			"main.cpp",
+			"../basic_initialize/btOpenCLUtils.cpp",
+			"../basic_initialize/btOpenCLUtils.h"
+		}
+	end
+	
+end
+
+createProject("AMD")
+createProject("NVIDIA")
+createProject("Intel")
+createProject("Apple")