SanzSkuy at 08:29, 2 January 2026

2026-01-02T08:29:07Z

← Older revision		Revision as of 08:29, 2 January 2026
Line 98:		Line 98:
	add_executable(main main.cpp)		add_executable(main main.cpp)

	target_link_libraries(~~opencl_hello~~ OpenCL::OpenCL)		target_link_libraries(main OpenCL::OpenCL)
	</syntaxhighlight>		</syntaxhighlight>
	Lalu cara run		Lalu cara run

SanzSkuy at 08:25, 2 January 2026

2026-01-02T08:25:50Z

← Older revision		Revision as of 08:25, 2 January 2026
Line 1:		Line 1:
	Install OpenCL (untuk Nvidia)		Install OpenCL (untuk Nvidia)
	<~~syntaxhighligh~~ lang=bash>		<syntaxhighlight lang=bash>
	sudo pacman -S opencl-headers ocl-icd opencl-nvidia		sudo pacman -S opencl-headers ocl-icd opencl-nvidia
	</syntaxhighlight>		</syntaxhighlight>

SanzSkuy: Created page with "Install OpenCL (untuk Nvidia) sudo pacman -S opencl-headers ocl-icd opencl-nvidia main.cpp #include #include #include const char* kernelSource = R"( __kernel void vector_add(global const float* a, global const float* b, __global float* c) { int gid = get_global_id(0); c[gid] = a[gid] + b[gid]; } )"; int mai..."

2026-01-02T08:25:35Z

Created page with "Install OpenCL (untuk Nvidia) <syntaxhighligh lang=bash> sudo pacman -S opencl-headers ocl-icd opencl-nvidia </syntaxhighlight> main.cpp <syntaxhighlight lang=cpp> #include <CL/cl.h> #include <iostream> #include <vector> const char* kernelSource = R"( __kernel void vector_add(__global const float* a, __global const float* b, __global float* c) { int gid = get_global_id(0); c[gid] = a[gid] + b[gid]; } )"; int mai..."

New page

Install OpenCL (untuk Nvidia)
<syntaxhighligh lang=bash>
sudo pacman -S opencl-headers ocl-icd opencl-nvidia
</syntaxhighlight>
main.cpp
<syntaxhighlight lang=cpp>
#include <CL/cl.h>
#include <iostream>
#include <vector>

const char* kernelSource = R"(
__kernel void vector_add(__global const float* a,
__global const float* b,
__global float* c) {
int gid = get_global_id(0);
c[gid] = a[gid] + b[gid];
}
)";

int main() {
const int ARRAY_SIZE = 1024;

// Host data
std::vector<float> a(ARRAY_SIZE, 1.0f);
std::vector<float> b(ARRAY_SIZE, 2.0f);
std::vector<float> c(ARRAY_SIZE);

// Get platform
cl_platform_id platform;
clGetPlatformIDs(1, &platform, nullptr);

// Get device
cl_device_id device;
clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, nullptr);

// Create context
cl_context context = clCreateContext(nullptr, 1, &device, nullptr, nullptr, nullptr);

// Create command queue
cl_command_queue queue = clCreateCommandQueue(context, device, 0, nullptr);

// Create buffers
cl_mem bufA = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
sizeof(float) * ARRAY_SIZE, a.data(), nullptr);
cl_mem bufB = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
sizeof(float) * ARRAY_SIZE, b.data(), nullptr);
cl_mem bufC = clCreateBuffer(context, CL_MEM_WRITE_ONLY,
sizeof(float) * ARRAY_SIZE, nullptr, nullptr);

// Create program
cl_program program = clCreateProgramWithSource(context, 1, &kernelSource, nullptr, nullptr);
clBuildProgram(program, 1, &device, nullptr, nullptr, nullptr);

// Create kernel
cl_kernel kernel = clCreateKernel(program, "vector_add", nullptr);

// Set arguments
clSetKernelArg(kernel, 0, sizeof(cl_mem), &bufA);
clSetKernelArg(kernel, 1, sizeof(cl_mem), &bufB);
clSetKernelArg(kernel, 2, sizeof(cl_mem), &bufC);

// Execute kernel
size_t globalSize = ARRAY_SIZE;
clEnqueueNDRangeKernel(queue, kernel, 1, nullptr, &globalSize, nullptr, 0, nullptr, nullptr);

// Read results
clEnqueueReadBuffer(queue, bufC, CL_TRUE, 0, sizeof(float) * ARRAY_SIZE, c.data(), 0, nullptr, nullptr);

// Verify results
std::cout << "OpenCL Hello World - Vector Addition\n";
std::cout << "First 5 results: ";
for (int i = 0; i < 5; i++) {
std::cout << c[i] << " ";
}
std::cout << "\nExpected: 3.0 for all elements\n";

// Cleanup
clReleaseMemObject(bufA);
clReleaseMemObject(bufB);
clReleaseMemObject(bufC);
clReleaseKernel(kernel);
clReleaseProgram(program);
clReleaseCommandQueue(queue);
clReleaseContext(context);

return 0;
}
</syntaxhighlight>
CMakeLists.txt
<syntaxhighlight lang=cmake>
cmake_minimum_required(VERSION 3.16)
project(opencl_hello C CXX)

set(CMAKE_C_STANDARD 11)

find_package(OpenCL REQUIRED)

add_executable(main main.cpp)

target_link_libraries(opencl_hello OpenCL::OpenCL)
</syntaxhighlight>
Lalu cara run
<syntaxhighlight lang=bash>
mkdir build && cd build
cmake ..
make
./main
</syntaxhighlight>

OpenCL: Setup & Hello World - Revision history

SanzSkuy at 08:29, 2 January 2026

SanzSkuy at 08:25, 2 January 2026