src/gallium/drivers/llvmpipe/lp_test_conv.c

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  27
  28
  29 /**
  30  * @file
  31  * Unit tests for type conversion.
  32  *
  33  * @author Jose Fonseca <jfonseca@vmware.com>
  34  */
  35
  36
  37 #include "util/u_pointer.h"
  38 #include "gallivm/lp_bld_init.h"
  39 #include "gallivm/lp_bld_type.h"
  40 #include "gallivm/lp_bld_const.h"
  41 #include "gallivm/lp_bld_conv.h"
  42 #include "gallivm/lp_bld_debug.h"
  43 #include "lp_test.h"
  44
  45
  46 typedef void (*conv_test_ptr_t)(const void *src, const void *dst);
  47
  48
  49 void
  50 write_tsv_header(FILE *fp)
  51 {
  52    fprintf(fp,
  53            "result\t"
  54            "cycles_per_channel\t"
  55            "src_type\t"
  56            "dst_type\n");
  57
  58    fflush(fp);
  59 }
  60
  61
  62 static void
  63 write_tsv_row(FILE *fp,
  64               struct lp_type src_type,
  65               struct lp_type dst_type,
  66               double cycles,
  67               boolean success)
  68 {
  69    fprintf(fp, "%s\t", success ? "pass" : "fail");
  70
  71    fprintf(fp, "%.1f\t", cycles / MAX2(src_type.length, dst_type.length));
  72
  73    dump_type(fp, src_type);
  74    fprintf(fp, "\t");
  75
  76    dump_type(fp, dst_type);
  77    fprintf(fp, "\n");
  78
  79    fflush(fp);
  80 }
  81
  82
  83 static void
  84 dump_conv_types(FILE *fp,
  85                struct lp_type src_type,
  86                struct lp_type dst_type)
  87 {
  88    fprintf(fp, "src_type=");
  89    dump_type(fp, src_type);
  90
  91    fprintf(fp, " dst_type=");
  92    dump_type(fp, dst_type);
  93
  94    fprintf(fp, " ...\n");
  95    fflush(fp);
  96 }
  97
  98
  99 static LLVMValueRef
 100 add_conv_test(struct gallivm_state *gallivm,
 101               struct lp_type src_type, unsigned num_srcs,
 102               struct lp_type dst_type, unsigned num_dsts)
 103 {
 104    LLVMModuleRef module = gallivm->module;
 105    LLVMContextRef context = gallivm->context;
 106    LLVMBuilderRef builder = gallivm->builder;
 107    LLVMTypeRef args[2];
 108    LLVMValueRef func;
 109    LLVMValueRef src_ptr;
 110    LLVMValueRef dst_ptr;
 111    LLVMBasicBlockRef block;
 112    LLVMValueRef src[LP_MAX_VECTOR_LENGTH];
 113    LLVMValueRef dst[LP_MAX_VECTOR_LENGTH];
 114    unsigned i;
 115
 116    args[0] = LLVMPointerType(lp_build_vec_type(gallivm, src_type), 0);
 117    args[1] = LLVMPointerType(lp_build_vec_type(gallivm, dst_type), 0);
 118
 119    func = LLVMAddFunction(module, "test",
 120                           LLVMFunctionType(LLVMVoidTypeInContext(context),
 121                                            args, 2, 0));
 122    LLVMSetFunctionCallConv(func, LLVMCCallConv);
 123    src_ptr = LLVMGetParam(func, 0);
 124    dst_ptr = LLVMGetParam(func, 1);
 125
 126    block = LLVMAppendBasicBlockInContext(context, func, "entry");
 127    LLVMPositionBuilderAtEnd(builder, block);
 128
 129    for(i = 0; i < num_srcs; ++i) {
 130       LLVMValueRef index = LLVMConstInt(LLVMInt32TypeInContext(context), i, 0);
 131       LLVMValueRef ptr = LLVMBuildGEP(builder, src_ptr, &index, 1, "");
 132       src[i] = LLVMBuildLoad(builder, ptr, "");
 133    }
 134
 135    lp_build_conv(gallivm, src_type, dst_type, src, num_srcs, dst, num_dsts);
 136
 137    for(i = 0; i < num_dsts; ++i) {
 138       LLVMValueRef index = LLVMConstInt(LLVMInt32TypeInContext(context), i, 0);
 139       LLVMValueRef ptr = LLVMBuildGEP(builder, dst_ptr, &index, 1, "");
 140       LLVMBuildStore(builder, dst[i], ptr);
 141    }
 142
 143    LLVMBuildRetVoid(builder);
 144
 145    gallivm_verify_function(gallivm, func);
 146
 147    return func;
 148 }
 149
 150
 151 PIPE_ALIGN_STACK
 152 static boolean
 153 test_one(unsigned verbose,
 154          FILE *fp,
 155          struct lp_type src_type,
 156          struct lp_type dst_type)
 157 {
 158    struct gallivm_state *gallivm;
 159    LLVMValueRef func = NULL;
 160    conv_test_ptr_t conv_test_ptr;
 161    boolean success;
 162    const unsigned n = LP_TEST_NUM_SAMPLES;
 163    int64_t cycles[LP_TEST_NUM_SAMPLES];
 164    double cycles_avg = 0.0;
 165    unsigned num_srcs;
 166    unsigned num_dsts;
 167    double eps;
 168    unsigned i, j;
 169
 170    if ((src_type.width >= dst_type.width && src_type.length > dst_type.length) ||
 171        (src_type.width <= dst_type.width && src_type.length < dst_type.length)) {
 172       return TRUE;
 173    }
 174
 175    /* Known failures
 176     * - fixed point 32 -> float 32
 177     * - float 32 -> signed normalised integer 32
 178     */
 179    if ((src_type.floating && !dst_type.floating && dst_type.sign && dst_type.norm && src_type.width == dst_type.width) ||
 180        (!src_type.floating && dst_type.floating && src_type.fixed && src_type.width == dst_type.width)) {
 181       return TRUE;
 182    }
 183
 184    /* Known failures
 185     * - fixed point 32 -> float 32
 186     * - float 32 -> signed normalised integer 32
 187     */
 188    if ((src_type.floating && !dst_type.floating && dst_type.sign && dst_type.norm && src_type.width == dst_type.width) ||
 189        (!src_type.floating && dst_type.floating && src_type.fixed && src_type.width == dst_type.width)) {
 190       return TRUE;
 191    }
 192
 193    if(verbose >= 1)
 194       dump_conv_types(stderr, src_type, dst_type);
 195
 196    if (src_type.length > dst_type.length) {
 197       num_srcs = 1;
 198       num_dsts = src_type.length/dst_type.length;
 199    }
 200    else if (src_type.length < dst_type.length) {
 201       num_dsts = 1;
 202       num_srcs = dst_type.length/src_type.length;
 203    }
 204    else  {
 205       num_dsts = 1;
 206       num_srcs = 1;
 207    }
 208
 209    /* We must not loose or gain channels. Only precision */
 210    assert(src_type.length * num_srcs == dst_type.length * num_dsts);
 211
 212    eps = MAX2(lp_const_eps(src_type), lp_const_eps(dst_type));
 213
 214    gallivm = gallivm_create("test_module", LLVMGetGlobalContext());
 215
 216    func = add_conv_test(gallivm, src_type, num_srcs, dst_type, num_dsts);
 217
 218    gallivm_compile_module(gallivm);
 219
 220    conv_test_ptr = (conv_test_ptr_t)gallivm_jit_function(gallivm, func);
 221
 222    gallivm_free_ir(gallivm);
 223
 224    success = TRUE;
 225    for(i = 0; i < n && success; ++i) {
 226       unsigned src_stride = src_type.length*src_type.width/8;
 227       unsigned dst_stride = dst_type.length*dst_type.width/8;
 228       PIPE_ALIGN_VAR(LP_MIN_VECTOR_ALIGN) uint8_t src[LP_MAX_VECTOR_LENGTH*LP_MAX_VECTOR_LENGTH];
 229       PIPE_ALIGN_VAR(LP_MIN_VECTOR_ALIGN) uint8_t dst[LP_MAX_VECTOR_LENGTH*LP_MAX_VECTOR_LENGTH];
 230       double fref[LP_MAX_VECTOR_LENGTH*LP_MAX_VECTOR_LENGTH];
 231       uint8_t ref[LP_MAX_VECTOR_LENGTH*LP_MAX_VECTOR_LENGTH];
 232       int64_t start_counter = 0;
 233       int64_t end_counter = 0;
 234
 235       for(j = 0; j < num_srcs; ++j) {
 236          random_vec(src_type, src + j*src_stride);
 237          read_vec(src_type, src + j*src_stride, fref + j*src_type.length);
 238       }
 239
 240       for(j = 0; j < num_dsts; ++j) {
 241          write_vec(dst_type, ref + j*dst_stride, fref + j*dst_type.length);
 242       }
 243
 244       start_counter = rdtsc();
 245       conv_test_ptr(src, dst);
 246       end_counter = rdtsc();
 247
 248       cycles[i] = end_counter - start_counter;
 249
 250       for(j = 0; j < num_dsts; ++j) {
 251          if(!compare_vec_with_eps(dst_type, dst + j*dst_stride, ref + j*dst_stride, eps))
 252             success = FALSE;
 253       }
 254
 255       if (!success || verbose >= 3) {
 256          if(verbose < 1)
 257             dump_conv_types(stderr, src_type, dst_type);
 258          if (success) {
 259             fprintf(stderr, "PASS\n");
 260          }
 261          else {
 262             fprintf(stderr, "MISMATCH\n");
 263          }
 264
 265          for(j = 0; j < num_srcs; ++j) {
 266             fprintf(stderr, "  Src%u: ", j);
 267             dump_vec(stderr, src_type, src + j*src_stride);
 268             fprintf(stderr, "\n");
 269          }
 270
 271 #if 1
 272          fprintf(stderr, "  Ref: ");
 273          for(j = 0; j < src_type.length*num_srcs; ++j)
 274             fprintf(stderr, " %f", fref[j]);
 275          fprintf(stderr, "\n");
 276 #endif
 277
 278          for(j = 0; j < num_dsts; ++j) {
 279             fprintf(stderr, "  Dst%u: ", j);
 280             dump_vec(stderr, dst_type, dst + j*dst_stride);
 281             fprintf(stderr, "\n");
 282
 283             fprintf(stderr, "  Ref%u: ", j);
 284             dump_vec(stderr, dst_type, ref + j*dst_stride);
 285             fprintf(stderr, "\n");
 286          }
 287       }
 288    }
 289
 290    /*
 291     * Unfortunately the output of cycle counter is not very reliable as it comes
 292     * -- sometimes we get outliers (due IRQs perhaps?) which are
 293     * better removed to avoid random or biased data.
 294     */
 295    {
 296       double sum = 0.0, sum2 = 0.0;
 297       double avg, std;
 298       unsigned m;
 299
 300       for(i = 0; i < n; ++i) {
 301          sum += cycles[i];
 302          sum2 += cycles[i]*cycles[i];
 303       }
 304
 305       avg = sum/n;
 306       std = sqrtf((sum2 - n*avg*avg)/n);
 307
 308       m = 0;
 309       sum = 0.0;
 310       for(i = 0; i < n; ++i) {
 311          if(fabs(cycles[i] - avg) <= 4.0*std) {
 312             sum += cycles[i];
 313             ++m;
 314          }
 315       }
 316
 317       cycles_avg = sum/m;
 318
 319    }
 320
 321    if(fp)
 322       write_tsv_row(fp, src_type, dst_type, cycles_avg, success);
 323
 324    gallivm_destroy(gallivm);
 325
 326    return success;
 327 }
 328
 329
 330 const struct lp_type conv_types[] = {
 331    /* float, fixed,  sign,  norm, width, len */
 332
 333    /* Float */
 334    {   TRUE, FALSE,  TRUE,  TRUE,    32,   4 },
 335    {   TRUE, FALSE,  TRUE, FALSE,    32,   4 },
 336    {   TRUE, FALSE, FALSE,  TRUE,    32,   4 },
 337    {   TRUE, FALSE, FALSE, FALSE,    32,   4 },
 338
 339    {   TRUE, FALSE,  TRUE,  TRUE,    32,   8 },
 340    {   TRUE, FALSE,  TRUE, FALSE,    32,   8 },
 341    {   TRUE, FALSE, FALSE,  TRUE,    32,   8 },
 342    {   TRUE, FALSE, FALSE, FALSE,    32,   8 },
 343
 344    /* Fixed */
 345    {  FALSE,  TRUE,  TRUE,  TRUE,    32,   4 },
 346    {  FALSE,  TRUE,  TRUE, FALSE,    32,   4 },
 347    {  FALSE,  TRUE, FALSE,  TRUE,    32,   4 },
 348    {  FALSE,  TRUE, FALSE, FALSE,    32,   4 },
 349
 350    {  FALSE,  TRUE,  TRUE,  TRUE,    32,   8 },
 351    {  FALSE,  TRUE,  TRUE, FALSE,    32,   8 },
 352    {  FALSE,  TRUE, FALSE,  TRUE,    32,   8 },
 353    {  FALSE,  TRUE, FALSE, FALSE,    32,   8 },
 354
 355    /* Integer */
 356    {  FALSE, FALSE,  TRUE,  TRUE,    32,   4 },
 357    {  FALSE, FALSE,  TRUE, FALSE,    32,   4 },
 358    {  FALSE, FALSE, FALSE,  TRUE,    32,   4 },
 359    {  FALSE, FALSE, FALSE, FALSE,    32,   4 },
 360
 361    {  FALSE, FALSE,  TRUE,  TRUE,    32,   8 },
 362    {  FALSE, FALSE,  TRUE, FALSE,    32,   8 },
 363    {  FALSE, FALSE, FALSE,  TRUE,    32,   8 },
 364    {  FALSE, FALSE, FALSE, FALSE,    32,   8 },
 365
 366    {  FALSE, FALSE,  TRUE,  TRUE,    16,   8 },
 367    {  FALSE, FALSE,  TRUE, FALSE,    16,   8 },
 368    {  FALSE, FALSE, FALSE,  TRUE,    16,   8 },
 369    {  FALSE, FALSE, FALSE, FALSE,    16,   8 },
 370
 371    {  FALSE, FALSE,  TRUE,  TRUE,     8,  16 },
 372    {  FALSE, FALSE,  TRUE, FALSE,     8,  16 },
 373    {  FALSE, FALSE, FALSE,  TRUE,     8,  16 },
 374    {  FALSE, FALSE, FALSE, FALSE,     8,  16 },
 375
 376    {  FALSE, FALSE,  TRUE,  TRUE,     8,   4 },
 377    {  FALSE, FALSE,  TRUE, FALSE,     8,   4 },
 378    {  FALSE, FALSE, FALSE,  TRUE,     8,   4 },
 379    {  FALSE, FALSE, FALSE, FALSE,     8,   4 },
 380
 381    {  FALSE, FALSE,  FALSE,  TRUE,    8,   8 },
 382 };
 383
 384
 385 const unsigned num_types = ARRAY_SIZE(conv_types);
 386
 387
 388 boolean
 389 test_all(unsigned verbose, FILE *fp)
 390 {
 391    const struct lp_type *src_type;
 392    const struct lp_type *dst_type;
 393    boolean success = TRUE;
 394    int error_count = 0;
 395
 396    for(src_type = conv_types; src_type < &conv_types[num_types]; ++src_type) {
 397       for(dst_type = conv_types; dst_type < &conv_types[num_types]; ++dst_type) {
 398
 399          if(src_type == dst_type)
 400             continue;
 401
 402          if(!test_one(verbose, fp, *src_type, *dst_type)){
 403             success = FALSE;
 404             ++error_count;
 405          }
 406       }
 407    }
 408
 409    fprintf(stderr, "%d failures\n", error_count);
 410
 411    return success;
 412 }
 413
 414
 415 boolean
 416 test_some(unsigned verbose, FILE *fp,
 417           unsigned long n)
 418 {
 419    const struct lp_type *src_type;
 420    const struct lp_type *dst_type;
 421    unsigned long i;
 422    boolean success = TRUE;
 423
 424    for(i = 0; i < n; ++i) {
 425       src_type = &conv_types[rand() % num_types];
 426
 427       do {
 428          dst_type = &conv_types[rand() % num_types];
 429       } while (src_type == dst_type || src_type->norm != dst_type->norm);
 430
 431       if(!test_one(verbose, fp, *src_type, *dst_type))
 432         success = FALSE;
 433    }
 434
 435    return success;
 436 }
 437
 438
 439 boolean
 440 test_single(unsigned verbose, FILE *fp)
 441 {
 442    /*    float, fixed,  sign,  norm, width, len */
 443    struct lp_type f32x4_type =
 444       {   TRUE, FALSE,  TRUE,  TRUE,    32,   4 };
 445    struct lp_type ub8x4_type =
 446       {  FALSE, FALSE, FALSE,  TRUE,     8,  16 };
 447
 448    boolean success;
 449
 450    success = test_one(verbose, fp, f32x4_type, ub8x4_type);
 451
 452    return success;
 453 }