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example.c
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#include <CL/cl.h>
#include "opencl_target.h"
char *cl_errstr(cl_int err) {
switch (err) {
case CL_SUCCESS: return "CL_SUCCESS";
case CL_DEVICE_NOT_FOUND: return "CL_DEVICE_NOT_FOUND";
case CL_DEVICE_NOT_AVAILABLE: return "CL_DEVICE_NOT_AVAILABLE";
case CL_COMPILER_NOT_AVAILABLE: return "CL_COMPILER_NOT_AVAILABLE";
case CL_MEM_OBJECT_ALLOCATION_FAILURE: return "CL_MEM_OBJECT_ALLOCATION_FAILURE";
case CL_OUT_OF_RESOURCES: return "CL_OUT_OF_RESOURCES";
case CL_OUT_OF_HOST_MEMORY: return "CL_OUT_OF_HOST_MEMORY";
case CL_PROFILING_INFO_NOT_AVAILABLE: return "CL_PROFILING_INFO_NOT_AVAILABLE";
case CL_MEM_COPY_OVERLAP: return "CL_MEM_COPY_OVERLAP";
case CL_IMAGE_FORMAT_MISMATCH: return "CL_IMAGE_FORMAT_MISMATCH";
case CL_IMAGE_FORMAT_NOT_SUPPORTED: return "CL_IMAGE_FORMAT_NOT_SUPPORTED";
case CL_BUILD_PROGRAM_FAILURE: return "CL_BUILD_PROGRAM_FAILURE";
case CL_MAP_FAILURE: return "CL_MAP_FAILURE";
case CL_MISALIGNED_SUB_BUFFER_OFFSET: return "CL_MISALIGNED_SUB_BUFFER_OFFSET";
case CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST: return "CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST";
case CL_COMPILE_PROGRAM_FAILURE: return "CL_COMPILE_PROGRAM_FAILURE";
case CL_LINKER_NOT_AVAILABLE: return "CL_LINKER_NOT_AVAILABLE";
case CL_LINK_PROGRAM_FAILURE: return "CL_LINK_PROGRAM_FAILURE";
case CL_DEVICE_PARTITION_FAILED: return "CL_DEVICE_PARTITION_FAILED";
case CL_KERNEL_ARG_INFO_NOT_AVAILABLE: return "CL_KERNEL_ARG_INFO_NOT_AVAILABLE";
case CL_INVALID_VALUE: return "CL_INVALID_VALUE";
case CL_INVALID_DEVICE_TYPE: return "CL_INVALID_DEVICE_TYPE";
case CL_INVALID_PLATFORM: return "CL_INVALID_PLATFORM";
case CL_INVALID_DEVICE: return "CL_INVALID_DEVICE";
case CL_INVALID_CONTEXT: return "CL_INVALID_CONTEXT";
case CL_INVALID_QUEUE_PROPERTIES: return "CL_INVALID_QUEUE_PROPERTIES";
case CL_INVALID_COMMAND_QUEUE: return "CL_INVALID_COMMAND_QUEUE";
case CL_INVALID_HOST_PTR: return "CL_INVALID_HOST_PTR";
case CL_INVALID_MEM_OBJECT: return "CL_INVALID_MEM_OBJECT";
case CL_INVALID_IMAGE_FORMAT_DESCRIPTOR: return "CL_INVALID_IMAGE_FORMAT_DESCRIPTOR";
case CL_INVALID_IMAGE_SIZE: return "CL_INVALID_IMAGE_SIZE";
case CL_INVALID_SAMPLER: return "CL_INVALID_SAMPLER";
case CL_INVALID_BINARY: return "CL_INVALID_BINARY";
case CL_INVALID_BUILD_OPTIONS: return "CL_INVALID_BUILD_OPTIONS";
case CL_INVALID_PROGRAM: return "CL_INVALID_PROGRAM";
case CL_INVALID_PROGRAM_EXECUTABLE: return "CL_INVALID_PROGRAM_EXECUTABLE";
case CL_INVALID_KERNEL_NAME: return "CL_INVALID_KERNEL_NAME";
case CL_INVALID_KERNEL_DEFINITION: return "CL_INVALID_KERNEL_DEFINITION";
case CL_INVALID_KERNEL: return "CL_INVALID_KERNEL";
case CL_INVALID_ARG_INDEX: return "CL_INVALID_ARG_INDEX";
case CL_INVALID_ARG_VALUE: return "CL_INVALID_ARG_VALUE";
case CL_INVALID_ARG_SIZE: return "CL_INVALID_ARG_SIZE";
case CL_INVALID_KERNEL_ARGS: return "CL_INVALID_KERNEL_ARGS";
case CL_INVALID_WORK_DIMENSION: return "CL_INVALID_WORK_DIMENSION";
case CL_INVALID_WORK_GROUP_SIZE: return "CL_INVALID_WORK_GROUP_SIZE";
case CL_INVALID_WORK_ITEM_SIZE: return "CL_INVALID_WORK_ITEM_SIZE";
case CL_INVALID_GLOBAL_OFFSET: return "CL_INVALID_GLOBAL_OFFSET";
case CL_INVALID_EVENT_WAIT_LIST: return "CL_INVALID_EVENT_WAIT_LIST";
case CL_INVALID_EVENT: return "CL_INVALID_EVENT";
case CL_INVALID_OPERATION: return "CL_INVALID_OPERATION";
case CL_INVALID_GL_OBJECT: return "CL_INVALID_GL_OBJECT";
case CL_INVALID_BUFFER_SIZE: return "CL_INVALID_BUFFER_SIZE";
case CL_INVALID_MIP_LEVEL: return "CL_INVALID_MIP_LEVEL";
case CL_INVALID_GLOBAL_WORK_SIZE: return "CL_INVALID_GLOBAL_WORK_SIZE";
case CL_INVALID_PROPERTY: return "CL_INVALID_PROPERTY";
case CL_INVALID_IMAGE_DESCRIPTOR: return "CL_INVALID_IMAGE_DESCRIPTOR";
case CL_INVALID_COMPILER_OPTIONS: return "CL_INVALID_COMPILER_OPTIONS";
case CL_INVALID_LINKER_OPTIONS: return "CL_INVALID_LINKER_OPTIONS";
case CL_INVALID_DEVICE_PARTITION_COUNT: return "CL_INVALID_DEVICE_PARTITION_COUNT";
case CL_INVALID_PIPE_SIZE: return "CL_INVALID_PIPE_SIZE";
case CL_INVALID_DEVICE_QUEUE: return "CL_INVALID_DEVICE_QUEUE";
default: return "UNKNOWN ERROR";
}
}
#define CL_CHECK(funcname, errcode) do { \
if (errcode != CL_SUCCESS) { \
fprintf(stderr, "%s:%d ERROR: %s() %s\n", __FILE__, __LINE__, funcname, cl_errstr(errcode)); \
abort(); \
} \
} while (0)
#define CL_CALL(func, ...) do { \
cl_int __cl_err = CL_SUCCESS; \
__cl_err = func(__VA_ARGS__, ); \
if (__cl_err != CL_SUCCESS) { \
fprintf(stderr, "%s:%d ERROR: OpenCL primitive failed: %s\n", __FILE__, __LINE__, #func ); \
abort(); \
} \
} while (0)
int main() {
cl_int err;
opencl_target target;
opencl_target_init(&target);
cl_context_properties properties[] = {
CL_CONTEXT_PLATFORM, (cl_context_properties)(target.platform_id),
0
};
cl_context context = clCreateContext(properties, 1, &(target.device_id), NULL, NULL, &err);
CL_CHECK("clCreateContext", err);
const char *kernel_source =
"__kernel void simple_add(\n"
" global const int* A,\n"
" global const int* B,\n"
" global int* C)\n"
"{\n"
" C[get_global_id(0)] = A[get_global_id(0)] + B[get_global_id(0)];\n"
"}\n";
cl_program program = clCreateProgramWithSource(context, 1, &kernel_source, NULL, &err);
CL_CHECK("clCreateProgramWithSource", err);
err = clBuildProgram (program, 1, &(target.device_id), "", NULL, NULL);
CL_CHECK("clBuildProgram", err);
cl_command_queue queue = clCreateCommandQueueWithProperties(context, target.device_id, NULL, &err);
CL_CHECK("clCreateCommandQueue", err);
int A[] = {1, 2, 3, 4};
int B[] = {2, 3, 4, 5};
int C[] = {0, 0, 0, 0};
// Replace all below with a primitive like:
// opencl_run(
// context, program, etc...
// "kernel_name",
// IN, bufA,
// INOUT, bufB,
// OUT, bufC
// );
size_t size = sizeof(int) * 4;
cl_mem buffer_A = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR, size, A, &err);
CL_CHECK("clCreateBuffer", err);
cl_mem buffer_B = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR, size, B, &err);
CL_CHECK("clCreateBuffer", err);
cl_mem buffer_C = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR, size, C, &err);
CL_CHECK("clCreateBuffer", err);
cl_kernel kernel = clCreateKernel(program, "simple_add", &err);
CL_CHECK("clCreateKernel", err);
err = clSetKernelArg(kernel, 0, sizeof(cl_mem), &buffer_A);
CL_CHECK("clSetKernelArg", err);
err = clSetKernelArg(kernel, 1, sizeof(cl_mem), &buffer_B);
CL_CHECK("clSetKernelArg", err);
err = clSetKernelArg(kernel, 2, sizeof(cl_mem), &buffer_C);
CL_CHECK("clSetKernelArg", err);
const size_t worksize[] = {4};
err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, worksize, NULL, 0, NULL, NULL);
CL_CHECK("clEnqueueNDRangeKernel", err);
err = clFinish(queue);
CL_CHECK("clFinish", err);
err = clEnqueueReadBuffer(queue, buffer_C, CL_TRUE, 0, size, C, 0, NULL, NULL);
CL_CHECK("clEnqueueReadBuffer", err);
for (int i = 0; i < 4; i++) {
printf("%d + %d = %d\n", A[i], B[i], C[i]);
}
return 0;
}