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annotate src/ocl.cc @ 13:407935b73af3

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bollocks
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 04 Aug 2010 04:51:06 +0100
parents 85fd61f374d9
children 29f9330cfa4b
rev   line source
nuclear@8 1 #define OCL_CC_
nuclear@8 2
nuclear@0 3 #include <stdio.h>
nuclear@0 4 #include <stdlib.h>
nuclear@0 5 #include <string.h>
nuclear@8 6 #include <stdarg.h>
nuclear@0 7 #include <errno.h>
John@11 8 #ifndef _MSC_VER
nuclear@0 9 #include <alloca.h>
John@11 10 #else
John@11 11 #include <malloc.h>
John@11 12 #endif
nuclear@0 13 #include <sys/stat.h>
nuclear@0 14 #include "ocl.h"
nuclear@8 15 #include "ocl_errstr.h"
nuclear@0 16
nuclear@0 17
nuclear@0 18 class InitCL {
nuclear@0 19 public:
nuclear@0 20 InitCL();
nuclear@0 21 };
nuclear@0 22
nuclear@0 23 struct device_info {
nuclear@0 24 cl_device_id id;
nuclear@0 25 cl_device_type type;
nuclear@0 26 unsigned int units;
nuclear@0 27 unsigned int clock;
nuclear@0 28
nuclear@0 29 unsigned int dim;
nuclear@0 30 size_t *work_item_sizes;
nuclear@0 31 size_t work_group_size;
nuclear@0 32
nuclear@0 33 unsigned long mem_size;
nuclear@0 34 };
nuclear@0 35
nuclear@0 36 static bool init_opencl(void);
nuclear@0 37 static int select_device(struct device_info *di, int (*devcmp)(struct device_info*, struct device_info*));
nuclear@0 38 static int get_dev_info(cl_device_id dev, struct device_info *di);
nuclear@0 39 static int devcmp(struct device_info *a, struct device_info *b);
nuclear@0 40 static const char *devtypestr(cl_device_type type);
nuclear@0 41 static void print_memsize(FILE *out, unsigned long memsz);
nuclear@8 42 static const char *clstrerror(int err);
nuclear@0 43
nuclear@0 44
nuclear@0 45 static InitCL initcl;
nuclear@0 46 static cl_context ctx;
nuclear@0 47 static cl_command_queue cmdq;
nuclear@0 48 static device_info devinf;
nuclear@0 49
nuclear@0 50 InitCL::InitCL()
nuclear@0 51 {
nuclear@0 52 if(!init_opencl()) {
nuclear@0 53 exit(0);
nuclear@0 54 }
nuclear@0 55 }
nuclear@0 56
nuclear@0 57 static bool init_opencl(void)
nuclear@0 58 {
nuclear@0 59 if(select_device(&devinf, devcmp) == -1) {
nuclear@0 60 return false;
nuclear@0 61 }
nuclear@0 62
nuclear@0 63
nuclear@0 64 if(!(ctx = clCreateContext(0, 1, &devinf.id, 0, 0, 0))) {
nuclear@0 65 fprintf(stderr, "failed to create opencl context\n");
nuclear@0 66 return false;
nuclear@0 67 }
nuclear@0 68
nuclear@0 69 if(!(cmdq = clCreateCommandQueue(ctx, devinf.id, 0, 0))) {
nuclear@0 70 fprintf(stderr, "failed to create command queue\n");
nuclear@0 71 return false;
nuclear@0 72 }
nuclear@0 73 return true;
nuclear@0 74 }
nuclear@0 75
nuclear@0 76
nuclear@0 77 CLMemBuffer *create_mem_buffer(int rdwr, size_t sz, void *buf)
nuclear@0 78 {
nuclear@0 79 int err;
nuclear@0 80 cl_mem mem;
nuclear@12 81 cl_mem_flags flags = rdwr | CL_MEM_ALLOC_HOST_PTR;
nuclear@0 82
nuclear@12 83 if(buf) {
nuclear@12 84 flags |= CL_MEM_COPY_HOST_PTR;
nuclear@12 85 }
nuclear@0 86
nuclear@12 87
nuclear@12 88 if(!(mem = clCreateBuffer(ctx, flags, sz, buf, &err))) {
nuclear@8 89 fprintf(stderr, "failed to create memory buffer: %s\n", clstrerror(err));
nuclear@0 90 return 0;
nuclear@0 91 }
nuclear@0 92
nuclear@0 93 CLMemBuffer *mbuf = new CLMemBuffer;
nuclear@0 94 mbuf->mem = mem;
nuclear@0 95 mbuf->size = sz;
nuclear@12 96 mbuf->ptr = 0;
nuclear@0 97 return mbuf;
nuclear@0 98 }
nuclear@0 99
nuclear@0 100 void destroy_mem_buffer(CLMemBuffer *mbuf)
nuclear@0 101 {
nuclear@0 102 if(mbuf) {
nuclear@0 103 clReleaseMemObject(mbuf->mem);
nuclear@0 104 delete mbuf;
nuclear@0 105 }
nuclear@0 106 }
nuclear@0 107
nuclear@0 108 void *map_mem_buffer(CLMemBuffer *mbuf, int rdwr)
nuclear@0 109 {
nuclear@0 110 if(!mbuf) return 0;
nuclear@0 111
nuclear@12 112 #ifndef NDEBUG
nuclear@12 113 if(mbuf->ptr) {
nuclear@12 114 fprintf(stderr, "WARNING: map_mem_buffer called on already mapped buffer\n");
nuclear@12 115 }
nuclear@12 116 #endif
nuclear@12 117
nuclear@0 118 int err;
nuclear@0 119 mbuf->ptr = clEnqueueMapBuffer(cmdq, mbuf->mem, 1, rdwr, 0, mbuf->size, 0, 0, 0, &err);
nuclear@0 120 if(!mbuf->ptr) {
nuclear@8 121 fprintf(stderr, "failed to map buffer: %s\n", clstrerror(err));
nuclear@0 122 return 0;
nuclear@0 123 }
nuclear@0 124 return mbuf->ptr;
nuclear@0 125 }
nuclear@0 126
nuclear@0 127 void unmap_mem_buffer(CLMemBuffer *mbuf)
nuclear@0 128 {
nuclear@0 129 if(!mbuf || !mbuf->ptr) return;
nuclear@0 130 clEnqueueUnmapMemObject(cmdq, mbuf->mem, mbuf->ptr, 0, 0, 0);
nuclear@12 131 mbuf->ptr = 0;
nuclear@0 132 }
nuclear@0 133
nuclear@0 134 bool write_mem_buffer(CLMemBuffer *mbuf, size_t sz, void *src)
nuclear@0 135 {
nuclear@0 136 if(!mbuf) return false;
nuclear@0 137
nuclear@0 138 int err;
nuclear@0 139 if((err = clEnqueueWriteBuffer(cmdq, mbuf->mem, 1, 0, sz, src, 0, 0, 0)) != 0) {
nuclear@8 140 fprintf(stderr, "failed to write buffer: %s\n", clstrerror(err));
nuclear@0 141 return false;
nuclear@0 142 }
nuclear@0 143 return true;
nuclear@0 144 }
nuclear@0 145
nuclear@0 146 bool read_mem_buffer(CLMemBuffer *mbuf, size_t sz, void *dest)
nuclear@0 147 {
nuclear@0 148 if(!mbuf) return false;
nuclear@0 149
nuclear@0 150 int err;
nuclear@0 151 if((err = clEnqueueReadBuffer(cmdq, mbuf->mem, 1, 0, sz, dest, 0, 0, 0)) != 0) {
nuclear@8 152 fprintf(stderr, "failed to read buffer: %s\n", clstrerror(err));
nuclear@0 153 return false;
nuclear@0 154 }
nuclear@0 155 return true;
nuclear@0 156 }
nuclear@0 157
nuclear@0 158
nuclear@0 159 CLProgram::CLProgram(const char *kname)
nuclear@0 160 {
nuclear@0 161 prog = 0;
nuclear@0 162 kernel = 0;
nuclear@0 163 this->kname = kname;
nuclear@1 164 args.resize(16);
nuclear@0 165 built = false;
nuclear@0 166 }
nuclear@0 167
nuclear@0 168 CLProgram::~CLProgram()
nuclear@0 169 {
nuclear@0 170 if(prog) {
nuclear@0 171
nuclear@0 172 clReleaseProgram(prog);
nuclear@0 173 }
nuclear@0 174 if(kernel) {
nuclear@0 175
nuclear@0 176 clReleaseKernel(kernel);
nuclear@0 177 }
nuclear@1 178 for(size_t i=0; i<args.size(); i++) {
nuclear@1 179 if(args[i].type == ARGTYPE_MEM_BUF) {
nuclear@1 180 destroy_mem_buffer(args[i].v.mbuf);
nuclear@0 181 }
nuclear@0 182 }
nuclear@0 183 }
nuclear@0 184
nuclear@0 185 bool CLProgram::load(const char *fname)
nuclear@0 186 {
nuclear@0 187 FILE *fp;
nuclear@0 188 char *src;
nuclear@0 189 struct stat st;
nuclear@0 190
nuclear@0 191 printf("loading opencl program (%s)\n", fname);
nuclear@0 192
nuclear@0 193 if(!(fp = fopen(fname, "rb"))) {
nuclear@0 194 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@0 195 return false;
nuclear@0 196 }
nuclear@0 197
nuclear@0 198 fstat(fileno(fp), &st);
nuclear@0 199
nuclear@0 200 src = new char[st.st_size + 1];
nuclear@0 201
nuclear@0 202 fread(src, 1, st.st_size, fp);
nuclear@0 203 src[st.st_size] = 0;
nuclear@0 204 fclose(fp);
nuclear@0 205
nuclear@0 206
nuclear@0 207 if(!(prog = clCreateProgramWithSource(ctx, 1, (const char**)&src, 0, 0))) {
nuclear@0 208 fprintf(stderr, "error creating program object: %s\n", fname);
nuclear@0 209 delete [] src;
nuclear@0 210 return false;
nuclear@0 211 }
nuclear@0 212 delete [] src;
nuclear@0 213 return true;
nuclear@0 214 }
nuclear@0 215
nuclear@1 216 bool CLProgram::set_argi(int idx, int val)
nuclear@1 217 {
nuclear@1 218 if((int)args.size() <= idx) {
nuclear@1 219 args.resize(idx + 1);
nuclear@1 220 }
nuclear@1 221
nuclear@1 222 CLArg *arg = &args[idx];
nuclear@1 223 arg->type = ARGTYPE_INT;
nuclear@1 224 arg->v.ival = val;
nuclear@1 225 return true;
nuclear@1 226 }
nuclear@1 227
nuclear@1 228 bool CLProgram::set_argf(int idx, float val)
nuclear@1 229 {
nuclear@1 230 if((int)args.size() <= idx) {
nuclear@1 231 args.resize(idx + 1);
nuclear@1 232 }
nuclear@1 233
nuclear@1 234 CLArg *arg = &args[idx];
nuclear@1 235 arg->type = ARGTYPE_FLOAT;
nuclear@1 236 arg->v.fval = val;
nuclear@1 237 return true;
nuclear@1 238 }
nuclear@1 239
nuclear@1 240 bool CLProgram::set_arg_buffer(int idx, int rdwr, size_t sz, void *ptr)
nuclear@0 241 {
nuclear@13 242 printf("create argument %d buffer: %d bytes\n", idx, (int)sz);
nuclear@0 243 CLMemBuffer *buf;
nuclear@0 244
nuclear@0 245 if(!(buf = create_mem_buffer(rdwr, sz, ptr))) {
nuclear@0 246 return false;
nuclear@0 247 }
nuclear@0 248
nuclear@1 249 if((int)args.size() <= idx) {
nuclear@1 250 args.resize(idx + 1);
nuclear@0 251 }
nuclear@1 252 args[idx].type = ARGTYPE_MEM_BUF;
nuclear@1 253 args[idx].v.mbuf = buf;
nuclear@0 254 return true;
nuclear@0 255 }
nuclear@0 256
nuclear@0 257 CLMemBuffer *CLProgram::get_arg_buffer(int arg)
nuclear@0 258 {
nuclear@1 259 if(arg < 0 || arg >= (int)args.size() || args[arg].type != ARGTYPE_MEM_BUF) {
nuclear@0 260 return 0;
nuclear@0 261 }
nuclear@1 262 return args[arg].v.mbuf;
nuclear@0 263 }
nuclear@0 264
nuclear@0 265 bool CLProgram::build()
nuclear@0 266 {
nuclear@2 267 int err;
nuclear@0 268
nuclear@2 269 if((err = clBuildProgram(prog, 0, 0, 0, 0, 0)) != 0) {
nuclear@2 270 size_t sz;
nuclear@2 271 clGetProgramBuildInfo(prog, devinf.id, CL_PROGRAM_BUILD_LOG, 0, 0, &sz);
nuclear@0 272
nuclear@2 273 char *errlog = (char*)alloca(sz + 1);
nuclear@2 274 clGetProgramBuildInfo(prog, devinf.id, CL_PROGRAM_BUILD_LOG, sz, errlog, 0);
nuclear@8 275 fprintf(stderr, "failed to build program: %s\n%s\n", clstrerror(err), errlog);
nuclear@2 276
nuclear@0 277 clReleaseProgram(prog);
nuclear@0 278 prog = 0;
nuclear@0 279 return false;
nuclear@0 280 }
nuclear@0 281
nuclear@0 282
nuclear@0 283 if(!(kernel = clCreateKernel(prog, kname.c_str(), 0))) {
nuclear@0 284 fprintf(stderr, "failed to create kernel: %s\n", kname.c_str());
nuclear@0 285 clReleaseProgram(prog);
nuclear@0 286 prog = 0;
nuclear@0 287 return false;
nuclear@0 288 }
nuclear@0 289
nuclear@1 290 for(size_t i=0; i<args.size(); i++) {
nuclear@1 291 int err;
nuclear@0 292
nuclear@1 293 if(args[i].type == ARGTYPE_NONE) {
nuclear@1 294 break;
nuclear@1 295 }
nuclear@1 296
nuclear@1 297 switch(args[i].type) {
nuclear@1 298 case ARGTYPE_INT:
nuclear@1 299 if((err = clSetKernelArg(kernel, i, sizeof(int), &args[i].v.ival)) != 0) {
nuclear@8 300 fprintf(stderr, "failed to bind kernel argument %d: %s\n", (int)i, clstrerror(err));
nuclear@1 301 goto fail;
nuclear@1 302 }
nuclear@1 303 break;
nuclear@1 304
nuclear@1 305 case ARGTYPE_FLOAT:
nuclear@1 306 if((err = clSetKernelArg(kernel, i, sizeof(float), &args[i].v.fval)) != 0) {
nuclear@8 307 fprintf(stderr, "failed to bind kernel argument %d: %s\n", (int)i, clstrerror(err));
nuclear@1 308 goto fail;
nuclear@1 309 }
nuclear@1 310 break;
nuclear@1 311
nuclear@1 312 case ARGTYPE_MEM_BUF:
nuclear@1 313 {
nuclear@1 314 CLMemBuffer *mbuf = args[i].v.mbuf;
nuclear@1 315
nuclear@1 316 if((err = clSetKernelArg(kernel, i, sizeof mbuf->mem, &mbuf->mem)) != 0) {
nuclear@8 317 fprintf(stderr, "failed to bind kernel argument %d: %s\n", (int)i, clstrerror(err));
nuclear@1 318 goto fail;
nuclear@1 319 }
nuclear@1 320 }
nuclear@1 321 break;
nuclear@1 322
nuclear@1 323 default:
nuclear@1 324 break;
nuclear@0 325 }
nuclear@0 326 }
nuclear@0 327
nuclear@0 328 built = true;
nuclear@0 329 return true;
nuclear@1 330
nuclear@1 331 fail:
nuclear@1 332 clReleaseProgram(prog);
nuclear@1 333 clReleaseKernel(kernel);
nuclear@1 334 prog = 0;
nuclear@1 335 kernel = 0;
nuclear@1 336 return false;
nuclear@0 337 }
nuclear@0 338
nuclear@0 339 bool CLProgram::run() const
nuclear@0 340 {
nuclear@0 341 return run(1, 1);
nuclear@0 342 }
nuclear@0 343
nuclear@0 344 bool CLProgram::run(int dim, ...) const
nuclear@0 345 {
nuclear@0 346 if(!built) {
nuclear@0 347 if(!((CLProgram*)this)->build()) {
nuclear@0 348 return false;
nuclear@0 349 }
nuclear@0 350 }
nuclear@0 351
nuclear@0 352 va_list ap;
nuclear@0 353 size_t *global_size = (size_t*)alloca(dim * sizeof *global_size);
nuclear@0 354
nuclear@0 355 va_start(ap, dim);
nuclear@0 356 for(int i=0; i<dim; i++) {
nuclear@0 357 global_size[i] = va_arg(ap, int);
nuclear@0 358 }
nuclear@0 359 va_end(ap);
nuclear@0 360
nuclear@0 361 int err;
nuclear@0 362 if((err = clEnqueueNDRangeKernel(cmdq, kernel, dim, 0, global_size, 0, 0, 0, 0)) != 0) {
nuclear@8 363 fprintf(stderr, "error executing kernel: %s\n", clstrerror(err));
nuclear@0 364 return false;
nuclear@0 365 }
nuclear@0 366 return true;
nuclear@0 367 }
nuclear@0 368
nuclear@0 369 static int select_device(struct device_info *dev_inf, int (*devcmp)(struct device_info*, struct device_info*))
nuclear@0 370 {
nuclear@8 371 unsigned int i, j, num_dev, num_plat, sel, ret;
nuclear@0 372 cl_device_id dev[32];
nuclear@8 373 cl_platform_id plat[32];
nuclear@0 374
nuclear@0 375 dev_inf->work_item_sizes = 0;
nuclear@0 376
nuclear@8 377 if((ret = clGetPlatformIDs(32, plat, &num_plat)) != 0) {
nuclear@8 378 fprintf(stderr, "clGetPlatformIDs failed: %s\n", clstrerror(ret));
nuclear@8 379 return -1;
nuclear@8 380 }
nuclear@8 381 if(!num_plat) {
nuclear@8 382 fprintf(stderr, "OpenCL not available!\n");
nuclear@8 383 return -1;
nuclear@8 384 }
nuclear@0 385
nuclear@8 386 for(i=0; i<num_plat; i++) {
nuclear@8 387 char buf[512];
nuclear@8 388
nuclear@8 389 clGetPlatformInfo(plat[i], CL_PLATFORM_NAME, sizeof buf, buf, 0);
nuclear@8 390 printf("[%d]: %s", i, buf);
nuclear@8 391 clGetPlatformInfo(plat[i], CL_PLATFORM_VENDOR, sizeof buf, buf, 0);
nuclear@8 392 printf(", %s", buf);
nuclear@8 393 clGetPlatformInfo(plat[i], CL_PLATFORM_VERSION, sizeof buf, buf, 0);
nuclear@8 394 printf(" (%s)\n", buf);
nuclear@8 395 }
nuclear@8 396
nuclear@8 397 if((ret = clGetDeviceIDs(plat[0], CL_DEVICE_TYPE_ALL, 32, dev, &num_dev)) != 0) {
nuclear@8 398 fprintf(stderr, "clGetDeviceIDs failed: %s\n", clstrerror(ret));
nuclear@8 399 return -1;
nuclear@8 400 }
nuclear@0 401 printf("found %d cl devices.\n", num_dev);
nuclear@0 402
nuclear@0 403 for(i=0; i<num_dev; i++) {
nuclear@0 404 struct device_info di;
nuclear@0 405
nuclear@0 406 if(get_dev_info(dev[i], &di) == -1) {
nuclear@0 407 free(dev_inf->work_item_sizes);
nuclear@0 408 return -1;
nuclear@0 409 }
nuclear@0 410
nuclear@0 411 printf("--> device %u (%s)\n", i, devtypestr(di.type));
nuclear@0 412 printf("max compute units: %u\n", di.units);
nuclear@0 413 printf("max clock frequency: %u\n", di.clock);
nuclear@0 414 printf("max work item dimensions: %u\n", di.dim);
nuclear@0 415
nuclear@0 416 printf("max work item sizes: ");
nuclear@0 417 for(j=0; j<di.dim; j++) {
nuclear@0 418 printf("%u", (unsigned int)di.work_item_sizes[j]);
nuclear@0 419 if(di.dim - j > 1) {
nuclear@0 420 printf(", ");
nuclear@0 421 }
nuclear@0 422 }
nuclear@0 423 putchar('\n');
nuclear@0 424
nuclear@0 425 printf("max work group size: %u\n", (unsigned int)di.work_group_size);
nuclear@0 426 printf("max object allocation size: ");
nuclear@0 427 print_memsize(stdout, di.mem_size);
nuclear@0 428 putchar('\n');
nuclear@0 429
nuclear@0 430 if(devcmp(&di, dev_inf) > 0) {
nuclear@0 431 free(dev_inf->work_item_sizes);
nuclear@0 432 memcpy(dev_inf, &di, sizeof di);
nuclear@0 433 sel = i;
nuclear@0 434 }
nuclear@0 435 }
nuclear@0 436
nuclear@0 437 if(num_dev) {
nuclear@0 438 printf("\nusing device: %d\n", sel);
nuclear@0 439 return 0;
nuclear@0 440 }
nuclear@0 441
nuclear@0 442 return -1;
nuclear@0 443 }
nuclear@0 444
nuclear@0 445 static int get_dev_info(cl_device_id dev, struct device_info *di)
nuclear@0 446 {
nuclear@0 447 di->id = dev;
nuclear@0 448
nuclear@0 449
nuclear@0 450 clGetDeviceInfo(dev, CL_DEVICE_TYPE, sizeof di->type, &di->type, 0);
nuclear@0 451 clGetDeviceInfo(dev, CL_DEVICE_MAX_COMPUTE_UNITS, sizeof di->units, &di->units, 0);
nuclear@0 452 clGetDeviceInfo(dev, CL_DEVICE_MAX_CLOCK_FREQUENCY, sizeof di->clock, &di->clock, 0);
nuclear@0 453 clGetDeviceInfo(dev, CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS, sizeof di->dim, &di->dim, 0);
nuclear@0 454
nuclear@0 455 di->work_item_sizes = new size_t[di->dim];
nuclear@0 456
nuclear@0 457 clGetDeviceInfo(dev, CL_DEVICE_MAX_WORK_ITEM_SIZES, di->dim * sizeof *di->work_item_sizes, di->work_item_sizes, 0);
nuclear@0 458 clGetDeviceInfo(dev, CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof di->work_group_size, &di->work_group_size, 0);
nuclear@0 459 clGetDeviceInfo(dev, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof di->mem_size, &di->mem_size, 0);
nuclear@0 460
nuclear@0 461 return 0;
nuclear@0 462 }
nuclear@0 463
nuclear@0 464 static int devcmp(struct device_info *a, struct device_info *b)
nuclear@0 465 {
nuclear@0 466 unsigned int aval = a->units * a->clock;
nuclear@0 467 unsigned int bval = b->units * b->clock;
nuclear@0 468
nuclear@0 469 return aval - bval;
nuclear@0 470 }
nuclear@0 471
nuclear@0 472 static const char *devtypestr(cl_device_type type)
nuclear@0 473 {
nuclear@0 474 switch(type) {
nuclear@0 475 case CL_DEVICE_TYPE_CPU:
nuclear@0 476 return "cpu";
nuclear@0 477 case CL_DEVICE_TYPE_GPU:
nuclear@0 478 return "gpu";
nuclear@0 479 case CL_DEVICE_TYPE_ACCELERATOR:
nuclear@0 480 return "accelerator";
nuclear@0 481 default:
nuclear@0 482 break;
nuclear@0 483 }
nuclear@0 484 return "unknown";
nuclear@0 485 }
nuclear@0 486
nuclear@0 487 static void print_memsize(FILE *out, unsigned long bytes)
nuclear@0 488 {
nuclear@0 489 int i;
nuclear@0 490 unsigned long memsz = bytes;
nuclear@0 491 const char *suffix[] = {"bytes", "kb", "mb", "gb", "tb", "pb", 0};
nuclear@0 492
nuclear@0 493 for(i=0; suffix[i]; i++) {
nuclear@0 494 if(memsz < 1024) {
nuclear@0 495 fprintf(out, "%lu %s", memsz, suffix[i]);
nuclear@0 496 if(i > 0) {
nuclear@0 497 fprintf(out, " (%lu bytes)", bytes);
nuclear@0 498 }
nuclear@0 499 return;
nuclear@0 500 }
nuclear@0 501
nuclear@0 502 memsz /= 1024;
nuclear@0 503 }
nuclear@0 504 }
nuclear@8 505
nuclear@8 506 static const char *clstrerror(int err)
nuclear@8 507 {
nuclear@8 508 if(err > 0) {
nuclear@8 509 return "<invalid error code>";
nuclear@8 510 }
nuclear@8 511 if(err <= -(int)(sizeof ocl_errstr / sizeof *ocl_errstr)) {
nuclear@8 512 return "<unknown error>";
nuclear@8 513 }
nuclear@8 514 return ocl_errstr[-err];
nuclear@8 515 }