int gpu_index;
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#ifdef GPU
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#ifdef CLBLAS
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#include <clBLAS.h>
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#endif
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#include "opencl.h"
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#include "utils.h"
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#include "activations.h"
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cl_info cl = {0};
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void check_error(cl_info info)
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{
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// clFinish(cl.queue);
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if (info.error != CL_SUCCESS) {
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printf("\n Error number %d", info.error);
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abort();
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exit(1);
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}
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}
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#define MAX_DEVICES 10
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cl_info cl_init(int index)
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{
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cl_info info;
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info.initialized = 0;
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if(index < 0) error("Won't initialize negative gpu id\n");
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cl_uint num_platforms, num_devices;
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// Fetch the Platform and Device IDs; we only want one.
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cl_device_id devices[MAX_DEVICES];
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info.error=clGetPlatformIDs(1, &info.platform, &num_platforms);
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check_error(info);
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info.error=clGetDeviceIDs(info.platform, CL_DEVICE_TYPE_ALL, MAX_DEVICES, devices, &num_devices);
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check_error(info);
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index = index%num_devices;
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info.device = devices[index];
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check_error(info);
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cl_context_properties properties[]={
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CL_CONTEXT_PLATFORM, (cl_context_properties)info.platform, 0};
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// Note that nVidia's OpenCL requires the platform property
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info.context=clCreateContext(properties, 1, &info.device, 0, 0, &info.error);
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check_error(info);
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info.queue = clCreateCommandQueue(info.context, info.device, 0, &info.error);
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check_error(info);
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#ifdef CLBLAS
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info.error = clblasSetup();
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#endif
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check_error(info);
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info.initialized = 1;
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#ifdef VERBOSE
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printf("=== %d OpenCL platform(s) found: ===\n", num_platforms);
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char buffer[10240];
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clGetPlatformInfo(info.platform, CL_PLATFORM_PROFILE, 10240, buffer, NULL);
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printf(" PROFILE = %s\n", buffer);
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clGetPlatformInfo(info.platform, CL_PLATFORM_VERSION, 10240, buffer, NULL);
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printf(" VERSION = %s\n", buffer);
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clGetPlatformInfo(info.platform, CL_PLATFORM_NAME, 10240, buffer, NULL);
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printf(" NAME = %s\n", buffer);
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clGetPlatformInfo(info.platform, CL_PLATFORM_VENDOR, 10240, buffer, NULL);
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printf(" VENDOR = %s\n", buffer);
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clGetPlatformInfo(info.platform, CL_PLATFORM_EXTENSIONS, 10240, buffer, NULL);
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printf(" EXTENSIONS = %s\n", buffer);
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check_error(info);
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if(num_devices > MAX_DEVICES) num_devices = MAX_DEVICES;
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printf("=== %d OpenCL device(s) found on platform:\n", num_devices);
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int i;
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for (i=0; i<num_devices; i++){
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char buffer[10240];
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cl_uint buf_uint;
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cl_ulong buf_ulong;
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printf(" -- %d --\n", i);
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clGetDeviceInfo(devices[i], CL_DEVICE_NAME, sizeof(buffer), buffer, NULL);
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printf(" DEVICE_NAME = %s\n", buffer);
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clGetDeviceInfo(devices[i], CL_DEVICE_VENDOR, sizeof(buffer), buffer, NULL);
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printf(" DEVICE_VENDOR = %s\n", buffer);
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clGetDeviceInfo(devices[i], CL_DEVICE_VERSION, sizeof(buffer), buffer, NULL);
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printf(" DEVICE_VERSION = %s\n", buffer);
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clGetDeviceInfo(devices[i], CL_DRIVER_VERSION, sizeof(buffer), buffer, NULL);
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printf(" DRIVER_VERSION = %s\n", buffer);
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clGetDeviceInfo(devices[i], CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(buf_uint), &buf_uint, NULL);
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printf(" DEVICE_MAX_COMPUTE_UNITS = %u\n", (unsigned int)buf_uint);
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clGetDeviceInfo(devices[i], CL_DEVICE_MAX_CLOCK_FREQUENCY, sizeof(buf_uint), &buf_uint, NULL);
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printf(" DEVICE_MAX_CLOCK_FREQUENCY = %u\n", (unsigned int)buf_uint);
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clGetDeviceInfo(devices[i], CL_DEVICE_GLOBAL_MEM_SIZE, sizeof(buf_ulong), &buf_ulong, NULL);
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printf(" DEVICE_GLOBAL_MEM_SIZE = %llu\n", (unsigned long long)buf_ulong);
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clGetDeviceInfo(devices[i], CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof(buf_ulong), &buf_ulong, NULL);
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printf(" DEVICE_MAX_MEM_ALLOC_SIZE = %llu\n", (unsigned long long)buf_ulong);
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clGetDeviceInfo(devices[i], CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(buf_ulong), &buf_ulong, NULL);
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printf(" DEVICE_MAX_WORK_GROUP_SIZE = %llu\n", (unsigned long long)buf_ulong);
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cl_uint items;
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clGetDeviceInfo( devices[i], CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS, sizeof(cl_uint),
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&items, NULL);
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printf(" DEVICE_MAX_WORK_ITEM_DIMENSIONS = %u\n", (unsigned int)items);
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size_t workitem_size[10];
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clGetDeviceInfo(devices[i], CL_DEVICE_MAX_WORK_ITEM_SIZES, 10*sizeof(workitem_size), workitem_size, NULL);
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printf(" DEVICE_MAX_WORK_ITEM_SIZES = %u / %u / %u \n", (unsigned int)workitem_size[0], (unsigned int)workitem_size[1], (unsigned int)workitem_size[2]);
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printf("%d devices, %d index\n", num_devices, index);
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}
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#endif
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return info;
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}
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cl_program cl_fprog(char *filename, char *options, cl_info info)
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{
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size_t srcsize;
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char src[64*1024];
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memset(src, 0, 64*1024);
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FILE *fil=fopen(filename,"r");
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if(fil == 0) file_error(filename);
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srcsize=fread(src, sizeof src, 1, fil);
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fclose(fil);
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const char *srcptr[]={src};
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// Submit the source code of the example kernel to OpenCL
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cl_program prog=clCreateProgramWithSource(info.context,1, srcptr, &srcsize, &info.error);
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check_error(info);
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char build_c[1024*64];
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// and compile it (after this we could extract the compiled version)
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info.error=clBuildProgram(prog, 0, 0, options, 0, 0);
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if ( info.error != CL_SUCCESS ) {
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fprintf(stderr, "Error Building Program: %d\n", info.error);
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clGetProgramBuildInfo( prog, info.device, CL_PROGRAM_BUILD_LOG, 1024*64, build_c, 0);
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fprintf(stderr, "Build Log for %s program:\n%s\n", filename, build_c);
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}
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check_error(info);
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return prog;
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}
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void cl_setup()
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{
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if(!cl.initialized){
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printf("initializing\n");
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cl = cl_init(gpu_index);
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}
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}
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cl_kernel get_kernel(char *filename, char *kernelname, char *options)
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{
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cl_program prog = cl_fprog(filename, options, cl);
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cl_kernel kernel=clCreateKernel(prog, kernelname, &cl.error);
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check_error(cl);
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return kernel;
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}
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void cl_read_array(cl_mem mem, float *x, int n)
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{
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if(gpu_index < 0) return;
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cl.error = clEnqueueReadBuffer(cl.queue, mem, CL_TRUE, 0, sizeof(float)*n,x,0,0,0);
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check_error(cl);
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}
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float cl_checksum(cl_mem mem, int n)
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{
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float *x = calloc(n, sizeof(float));
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cl_read_array(mem, x, n);
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float sum = sum_array(x, n);
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free(x);
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return sum;
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}
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void cl_write_array(cl_mem mem, float *x, int n)
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{
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if(gpu_index < 0) return;
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cl.error = clEnqueueWriteBuffer(cl.queue, mem, CL_TRUE, 0,sizeof(float)*n,x,0,0,0);
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check_error(cl);
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}
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void cl_copy_array(cl_mem src, cl_mem dst, int n)
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{
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cl.error = clEnqueueCopyBuffer(cl.queue, src, dst, 0, 0, sizeof(float)*n,0,0,0);
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check_error(cl);
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}
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cl_mem cl_sub_array(cl_mem src, int offset, int size)
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{
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cl_buffer_region r;
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r.origin = offset*sizeof(float);
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r.size = size*sizeof(float);
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cl_mem sub = clCreateSubBuffer(src, CL_MEM_READ_WRITE, CL_BUFFER_CREATE_TYPE_REGION, &r, &cl.error);
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check_error(cl);
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return sub;
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}
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cl_mem cl_make_array(float *x, int n)
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{
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if(gpu_index < 0) return 0;
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cl_mem mem = clCreateBuffer(cl.context,
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CL_MEM_READ_WRITE|CL_MEM_COPY_HOST_PTR,
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sizeof(float)*n, x, &cl.error);
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check_error(cl);
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activate_array_ongpu(mem, n, LINEAR);
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return mem;
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}
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cl_mem cl_make_int_array(int *x, int n)
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{
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if(gpu_index < 0) return 0;
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cl_mem mem = clCreateBuffer(cl.context,
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CL_MEM_READ_WRITE|CL_MEM_COPY_HOST_PTR,
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sizeof(int)*n, x, &cl.error);
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check_error(cl);
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return mem;
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}
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#endif
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