FFmpeg
checkasm.c
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1 /*
2  * Assembly testing and benchmarking tool
3  * Copyright (c) 2015 Henrik Gramner
4  * Copyright (c) 2008 Loren Merritt
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 #include "config.h"
24 
25 #if CONFIG_LINUX_PERF
26 # ifndef _GNU_SOURCE
27 # define _GNU_SOURCE // for syscall (performance monitoring API)
28 # endif
29 #endif
30 
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include "checkasm.h"
36 #include "libavutil/common.h"
37 #include "libavutil/cpu.h"
38 #include "libavutil/intfloat.h"
39 #include "libavutil/random_seed.h"
40 
41 #if HAVE_IO_H
42 #include <io.h>
43 #endif
44 
45 #if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
46 #include <windows.h>
47 #define COLOR_RED FOREGROUND_RED
48 #define COLOR_GREEN FOREGROUND_GREEN
49 #define COLOR_YELLOW (FOREGROUND_RED|FOREGROUND_GREEN)
50 #else
51 #define COLOR_RED 1
52 #define COLOR_GREEN 2
53 #define COLOR_YELLOW 3
54 #endif
55 
56 #if HAVE_UNISTD_H
57 #include <unistd.h>
58 #endif
59 
60 #if !HAVE_ISATTY
61 #define isatty(fd) 1
62 #endif
63 
64 #if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
65 #include "libavutil/arm/cpu.h"
66 
67 void (*checkasm_checked_call)(void *func, int dummy, ...) = checkasm_checked_call_novfp;
68 #endif
69 
70 /* List of tests to invoke */
71 static const struct {
72  const char *name;
73  void (*func)(void);
74 } tests[] = {
75 #if CONFIG_AVCODEC
76  #if CONFIG_AAC_DECODER
77  { "aacpsdsp", checkasm_check_aacpsdsp },
78  { "sbrdsp", checkasm_check_sbrdsp },
79  #endif
80  #if CONFIG_ALAC_DECODER
81  { "alacdsp", checkasm_check_alacdsp },
82  #endif
83  #if CONFIG_AUDIODSP
84  { "audiodsp", checkasm_check_audiodsp },
85  #endif
86  #if CONFIG_BLOCKDSP
87  { "blockdsp", checkasm_check_blockdsp },
88  #endif
89  #if CONFIG_BSWAPDSP
90  { "bswapdsp", checkasm_check_bswapdsp },
91  #endif
92  #if CONFIG_DCA_DECODER
93  { "synth_filter", checkasm_check_synth_filter },
94  #endif
95  #if CONFIG_EXR_DECODER
96  { "exrdsp", checkasm_check_exrdsp },
97  #endif
98  #if CONFIG_FLACDSP
99  { "flacdsp", checkasm_check_flacdsp },
100  #endif
101  #if CONFIG_FMTCONVERT
102  { "fmtconvert", checkasm_check_fmtconvert },
103  #endif
104  #if CONFIG_G722DSP
105  { "g722dsp", checkasm_check_g722dsp },
106  #endif
107  #if CONFIG_H264DSP
108  { "h264dsp", checkasm_check_h264dsp },
109  #endif
110  #if CONFIG_H264PRED
111  { "h264pred", checkasm_check_h264pred },
112  #endif
113  #if CONFIG_H264QPEL
114  { "h264qpel", checkasm_check_h264qpel },
115  #endif
116  #if CONFIG_HEVC_DECODER
117  { "hevc_add_res", checkasm_check_hevc_add_res },
118  { "hevc_idct", checkasm_check_hevc_idct },
119  { "hevc_sao", checkasm_check_hevc_sao },
120  #endif
121  #if CONFIG_HUFFYUV_DECODER
122  { "huffyuvdsp", checkasm_check_huffyuvdsp },
123  #endif
124  #if CONFIG_JPEG2000_DECODER
125  { "jpeg2000dsp", checkasm_check_jpeg2000dsp },
126  #endif
127  #if CONFIG_HUFFYUVDSP
128  { "llviddsp", checkasm_check_llviddsp },
129  #endif
130  #if CONFIG_LLVIDENCDSP
131  { "llviddspenc", checkasm_check_llviddspenc },
132  #endif
133  #if CONFIG_OPUS_DECODER
134  { "opusdsp", checkasm_check_opusdsp },
135  #endif
136  #if CONFIG_PIXBLOCKDSP
137  { "pixblockdsp", checkasm_check_pixblockdsp },
138  #endif
139  #if CONFIG_UTVIDEO_DECODER
140  { "utvideodsp", checkasm_check_utvideodsp },
141  #endif
142  #if CONFIG_V210_DECODER
143  { "v210dec", checkasm_check_v210dec },
144  #endif
145  #if CONFIG_V210_ENCODER
146  { "v210enc", checkasm_check_v210enc },
147  #endif
148  #if CONFIG_VP8DSP
149  { "vp8dsp", checkasm_check_vp8dsp },
150  #endif
151  #if CONFIG_VP9_DECODER
152  { "vp9dsp", checkasm_check_vp9dsp },
153  #endif
154  #if CONFIG_VIDEODSP
155  { "videodsp", checkasm_check_videodsp },
156  #endif
157 #endif
158 #if CONFIG_AVFILTER
159  #if CONFIG_AFIR_FILTER
160  { "af_afir", checkasm_check_afir },
161  #endif
162  #if CONFIG_BLEND_FILTER
163  { "vf_blend", checkasm_check_blend },
164  #endif
165  #if CONFIG_COLORSPACE_FILTER
166  { "vf_colorspace", checkasm_check_colorspace },
167  #endif
168  #if CONFIG_EQ_FILTER
169  { "vf_eq", checkasm_check_vf_eq },
170  #endif
171  #if CONFIG_GBLUR_FILTER
172  { "vf_gblur", checkasm_check_vf_gblur },
173  #endif
174  #if CONFIG_HFLIP_FILTER
175  { "vf_hflip", checkasm_check_vf_hflip },
176  #endif
177  #if CONFIG_NLMEANS_FILTER
178  { "vf_nlmeans", checkasm_check_nlmeans },
179  #endif
180  #if CONFIG_THRESHOLD_FILTER
181  { "vf_threshold", checkasm_check_vf_threshold },
182  #endif
183 #endif
184 #if CONFIG_SWSCALE
185  { "sw_rgb", checkasm_check_sw_rgb },
186  { "sw_scale", checkasm_check_sw_scale },
187 #endif
188 #if CONFIG_AVUTIL
189  { "fixed_dsp", checkasm_check_fixed_dsp },
190  { "float_dsp", checkasm_check_float_dsp },
191 #endif
192  { NULL }
193 };
194 
195 /* List of cpu flags to check */
196 static const struct {
197  const char *name;
198  const char *suffix;
199  int flag;
200 } cpus[] = {
201 #if ARCH_AARCH64
202  { "ARMV8", "armv8", AV_CPU_FLAG_ARMV8 },
203  { "NEON", "neon", AV_CPU_FLAG_NEON },
204 #elif ARCH_ARM
205  { "ARMV5TE", "armv5te", AV_CPU_FLAG_ARMV5TE },
206  { "ARMV6", "armv6", AV_CPU_FLAG_ARMV6 },
207  { "ARMV6T2", "armv6t2", AV_CPU_FLAG_ARMV6T2 },
208  { "VFP", "vfp", AV_CPU_FLAG_VFP },
209  { "VFP_VM", "vfp_vm", AV_CPU_FLAG_VFP_VM },
210  { "VFPV3", "vfp3", AV_CPU_FLAG_VFPV3 },
211  { "NEON", "neon", AV_CPU_FLAG_NEON },
212 #elif ARCH_PPC
213  { "ALTIVEC", "altivec", AV_CPU_FLAG_ALTIVEC },
214  { "VSX", "vsx", AV_CPU_FLAG_VSX },
215  { "POWER8", "power8", AV_CPU_FLAG_POWER8 },
216 #elif ARCH_X86
217  { "MMX", "mmx", AV_CPU_FLAG_MMX|AV_CPU_FLAG_CMOV },
218  { "MMXEXT", "mmxext", AV_CPU_FLAG_MMXEXT },
219  { "3DNOW", "3dnow", AV_CPU_FLAG_3DNOW },
220  { "3DNOWEXT", "3dnowext", AV_CPU_FLAG_3DNOWEXT },
221  { "SSE", "sse", AV_CPU_FLAG_SSE },
222  { "SSE2", "sse2", AV_CPU_FLAG_SSE2|AV_CPU_FLAG_SSE2SLOW },
223  { "SSE3", "sse3", AV_CPU_FLAG_SSE3|AV_CPU_FLAG_SSE3SLOW },
224  { "SSSE3", "ssse3", AV_CPU_FLAG_SSSE3|AV_CPU_FLAG_ATOM },
225  { "SSE4.1", "sse4", AV_CPU_FLAG_SSE4 },
226  { "SSE4.2", "sse42", AV_CPU_FLAG_SSE42 },
227  { "AES-NI", "aesni", AV_CPU_FLAG_AESNI },
228  { "AVX", "avx", AV_CPU_FLAG_AVX },
229  { "XOP", "xop", AV_CPU_FLAG_XOP },
230  { "FMA3", "fma3", AV_CPU_FLAG_FMA3 },
231  { "FMA4", "fma4", AV_CPU_FLAG_FMA4 },
232  { "AVX2", "avx2", AV_CPU_FLAG_AVX2 },
233  { "AVX-512", "avx512", AV_CPU_FLAG_AVX512 },
234 #endif
235  { NULL }
236 };
237 
238 typedef struct CheckasmFuncVersion {
240  void *func;
241  int ok;
242  int cpu;
245 
246 /* Binary search tree node */
247 typedef struct CheckasmFunc {
248  struct CheckasmFunc *child[2];
250  uint8_t color; /* 0 = red, 1 = black */
251  char name[1];
252 } CheckasmFunc;
253 
254 /* Internal state */
255 static struct {
259  const char *current_test_name;
260  const char *bench_pattern;
264 
265  /* perf */
266  int nop_time;
267  int sysfd;
268 
269  int cpu_flag;
270  const char *cpu_flag_name;
271  const char *test_name;
272  int verbose;
273 } state;
274 
275 /* PRNG state */
277 
278 /* float compare support code */
279 static int is_negative(union av_intfloat32 u)
280 {
281  return u.i >> 31;
282 }
283 
284 int float_near_ulp(float a, float b, unsigned max_ulp)
285 {
286  union av_intfloat32 x, y;
287 
288  x.f = a;
289  y.f = b;
290 
291  if (is_negative(x) != is_negative(y)) {
292  // handle -0.0 == +0.0
293  return a == b;
294  }
295 
296  if (llabs((int64_t)x.i - y.i) <= max_ulp)
297  return 1;
298 
299  return 0;
300 }
301 
302 int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
303  unsigned len)
304 {
305  unsigned i;
306 
307  for (i = 0; i < len; i++) {
308  if (!float_near_ulp(a[i], b[i], max_ulp))
309  return 0;
310  }
311  return 1;
312 }
313 
314 int float_near_abs_eps(float a, float b, float eps)
315 {
316  float abs_diff = fabsf(a - b);
317  if (abs_diff < eps)
318  return 1;
319 
320  fprintf(stderr, "test failed comparing %g with %g (abs diff=%g with EPS=%g)\n", a, b, abs_diff, eps);
321 
322  return 0;
323 }
324 
325 int float_near_abs_eps_array(const float *a, const float *b, float eps,
326  unsigned len)
327 {
328  unsigned i;
329 
330  for (i = 0; i < len; i++) {
331  if (!float_near_abs_eps(a[i], b[i], eps))
332  return 0;
333  }
334  return 1;
335 }
336 
337 int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
338 {
339  return float_near_ulp(a, b, max_ulp) || float_near_abs_eps(a, b, eps);
340 }
341 
342 int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
343  unsigned max_ulp, unsigned len)
344 {
345  unsigned i;
346 
347  for (i = 0; i < len; i++) {
348  if (!float_near_abs_eps_ulp(a[i], b[i], eps, max_ulp))
349  return 0;
350  }
351  return 1;
352 }
353 
354 int double_near_abs_eps(double a, double b, double eps)
355 {
356  double abs_diff = fabs(a - b);
357 
358  return abs_diff < eps;
359 }
360 
361 int double_near_abs_eps_array(const double *a, const double *b, double eps,
362  unsigned len)
363 {
364  unsigned i;
365 
366  for (i = 0; i < len; i++) {
367  if (!double_near_abs_eps(a[i], b[i], eps))
368  return 0;
369  }
370  return 1;
371 }
372 
373 /* Print colored text to stderr if the terminal supports it */
374 static void color_printf(int color, const char *fmt, ...)
375 {
376  static int use_color = -1;
377  va_list arg;
378 
379 #if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
380  static HANDLE con;
381  static WORD org_attributes;
382 
383  if (use_color < 0) {
384  CONSOLE_SCREEN_BUFFER_INFO con_info;
385  con = GetStdHandle(STD_ERROR_HANDLE);
386  if (con && con != INVALID_HANDLE_VALUE && GetConsoleScreenBufferInfo(con, &con_info)) {
387  org_attributes = con_info.wAttributes;
388  use_color = 1;
389  } else
390  use_color = 0;
391  }
392  if (use_color)
393  SetConsoleTextAttribute(con, (org_attributes & 0xfff0) | (color & 0x0f));
394 #else
395  if (use_color < 0) {
396  const char *term = getenv("TERM");
397  use_color = term && strcmp(term, "dumb") && isatty(2);
398  }
399  if (use_color)
400  fprintf(stderr, "\x1b[%d;3%dm", (color & 0x08) >> 3, color & 0x07);
401 #endif
402 
403  va_start(arg, fmt);
404  vfprintf(stderr, fmt, arg);
405  va_end(arg);
406 
407  if (use_color) {
408 #if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
409  SetConsoleTextAttribute(con, org_attributes);
410 #else
411  fprintf(stderr, "\x1b[0m");
412 #endif
413  }
414 }
415 
416 /* Deallocate a tree */
418 {
419  if (f) {
421  while (v) {
422  CheckasmFuncVersion *next = v->next;
423  free(v);
424  v = next;
425  }
426 
427  destroy_func_tree(f->child[0]);
428  destroy_func_tree(f->child[1]);
429  free(f);
430  }
431 }
432 
433 /* Allocate a zero-initialized block, clean up and exit on failure */
434 static void *checkasm_malloc(size_t size)
435 {
436  void *ptr = calloc(1, size);
437  if (!ptr) {
438  fprintf(stderr, "checkasm: malloc failed\n");
439  destroy_func_tree(state.funcs);
440  exit(1);
441  }
442  return ptr;
443 }
444 
445 /* Get the suffix of the specified cpu flag */
446 static const char *cpu_suffix(int cpu)
447 {
448  int i = FF_ARRAY_ELEMS(cpus);
449 
450  while (--i >= 0)
451  if (cpu & cpus[i].flag)
452  return cpus[i].suffix;
453 
454  return "c";
455 }
456 
457 static int cmp_nop(const void *a, const void *b)
458 {
459  return *(const uint16_t*)a - *(const uint16_t*)b;
460 }
461 
462 /* Measure the overhead of the timing code (in decicycles) */
463 static int measure_nop_time(void)
464 {
465  uint16_t nops[10000];
466  int i, nop_sum = 0;
467  av_unused const int sysfd = state.sysfd;
468 
469  uint64_t t = 0;
470  for (i = 0; i < 10000; i++) {
471  PERF_START(t);
472  PERF_STOP(t);
473  nops[i] = t;
474  }
475 
476  qsort(nops, 10000, sizeof(uint16_t), cmp_nop);
477  for (i = 2500; i < 7500; i++)
478  nop_sum += nops[i];
479 
480  return nop_sum / 500;
481 }
482 
483 /* Print benchmark results */
485 {
486  if (f) {
487  print_benchs(f->child[0]);
488 
489  /* Only print functions with at least one assembly version */
490  if (f->versions.cpu || f->versions.next) {
491  CheckasmFuncVersion *v = &f->versions;
492  do {
493  CheckasmPerf *p = &v->perf;
494  if (p->iterations) {
495  int decicycles = (10*p->cycles/p->iterations - state.nop_time) / 4;
496  printf("%s_%s: %d.%d\n", f->name, cpu_suffix(v->cpu), decicycles/10, decicycles%10);
497  }
498  } while ((v = v->next));
499  }
500 
501  print_benchs(f->child[1]);
502  }
503 }
504 
505 /* ASCIIbetical sort except preserving natural order for numbers */
506 static int cmp_func_names(const char *a, const char *b)
507 {
508  const char *start = a;
509  int ascii_diff, digit_diff;
510 
511  for (; !(ascii_diff = *(const unsigned char*)a - *(const unsigned char*)b) && *a; a++, b++);
512  for (; av_isdigit(*a) && av_isdigit(*b); a++, b++);
513 
514  if (a > start && av_isdigit(a[-1]) && (digit_diff = av_isdigit(*a) - av_isdigit(*b)))
515  return digit_diff;
516 
517  return ascii_diff;
518 }
519 
520 /* Perform a tree rotation in the specified direction and return the new root */
522 {
523  CheckasmFunc *r = f->child[dir^1];
524  f->child[dir^1] = r->child[dir];
525  r->child[dir] = f;
526  r->color = f->color;
527  f->color = 0;
528  return r;
529 }
530 
531 #define is_red(f) ((f) && !(f)->color)
532 
533 /* Balance a left-leaning red-black tree at the specified node */
534 static void balance_tree(CheckasmFunc **root)
535 {
536  CheckasmFunc *f = *root;
537 
538  if (is_red(f->child[0]) && is_red(f->child[1])) {
539  f->color ^= 1;
540  f->child[0]->color = f->child[1]->color = 1;
541  }
542 
543  if (!is_red(f->child[0]) && is_red(f->child[1]))
544  *root = rotate_tree(f, 0); /* Rotate left */
545  else if (is_red(f->child[0]) && is_red(f->child[0]->child[0]))
546  *root = rotate_tree(f, 1); /* Rotate right */
547 }
548 
549 /* Get a node with the specified name, creating it if it doesn't exist */
550 static CheckasmFunc *get_func(CheckasmFunc **root, const char *name)
551 {
552  CheckasmFunc *f = *root;
553 
554  if (f) {
555  /* Search the tree for a matching node */
556  int cmp = cmp_func_names(name, f->name);
557  if (cmp) {
558  f = get_func(&f->child[cmp > 0], name);
559 
560  /* Rebalance the tree on the way up if a new node was inserted */
561  if (!f->versions.func)
562  balance_tree(root);
563  }
564  } else {
565  /* Allocate and insert a new node into the tree */
566  int name_length = strlen(name);
567  f = *root = checkasm_malloc(sizeof(CheckasmFunc) + name_length);
568  memcpy(f->name, name, name_length + 1);
569  }
570 
571  return f;
572 }
573 
574 /* Perform tests and benchmarks for the specified cpu flag if supported by the host */
575 static void check_cpu_flag(const char *name, int flag)
576 {
577  int old_cpu_flag = state.cpu_flag;
578 
579  flag |= old_cpu_flag;
580  av_force_cpu_flags(-1);
581  state.cpu_flag = flag & av_get_cpu_flags();
582  av_force_cpu_flags(state.cpu_flag);
583 
584  if (!flag || state.cpu_flag != old_cpu_flag) {
585  int i;
586 
587  state.cpu_flag_name = name;
588  for (i = 0; tests[i].func; i++) {
589  if (state.test_name && strcmp(tests[i].name, state.test_name))
590  continue;
591  state.current_test_name = tests[i].name;
592  tests[i].func();
593  }
594  }
595 }
596 
597 /* Print the name of the current CPU flag, but only do it once */
598 static void print_cpu_name(void)
599 {
600  if (state.cpu_flag_name) {
601  color_printf(COLOR_YELLOW, "%s:\n", state.cpu_flag_name);
602  state.cpu_flag_name = NULL;
603  }
604 }
605 
606 #if CONFIG_LINUX_PERF
607 static int bench_init_linux(void)
608 {
609  struct perf_event_attr attr = {
610  .type = PERF_TYPE_HARDWARE,
611  .size = sizeof(struct perf_event_attr),
612  .config = PERF_COUNT_HW_CPU_CYCLES,
613  .disabled = 1, // start counting only on demand
614  .exclude_kernel = 1,
615  .exclude_hv = 1,
616  };
617 
618  printf("benchmarking with Linux Perf Monitoring API\n");
619 
620  state.sysfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0);
621  if (state.sysfd == -1) {
622  perror("syscall");
623  return -1;
624  }
625  return 0;
626 }
627 #endif
628 
629 #if !CONFIG_LINUX_PERF
630 static int bench_init_ffmpeg(void)
631 {
632 #ifdef AV_READ_TIME
633  printf("benchmarking with native FFmpeg timers\n");
634  return 0;
635 #else
636  fprintf(stderr, "checkasm: --bench is not supported on your system\n");
637  return -1;
638 #endif
639 }
640 #endif
641 
642 static int bench_init(void)
643 {
644 #if CONFIG_LINUX_PERF
645  int ret = bench_init_linux();
646 #else
647  int ret = bench_init_ffmpeg();
648 #endif
649  if (ret < 0)
650  return ret;
651 
652  state.nop_time = measure_nop_time();
653  printf("nop: %d.%d\n", state.nop_time/10, state.nop_time%10);
654  return 0;
655 }
656 
657 static void bench_uninit(void)
658 {
659 #if CONFIG_LINUX_PERF
660  if (state.sysfd > 0)
661  close(state.sysfd);
662 #endif
663 }
664 
665 int main(int argc, char *argv[])
666 {
667  unsigned int seed = av_get_random_seed();
668  int i, ret = 0;
669 
670 #if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
672  checkasm_checked_call = checkasm_checked_call_vfp;
673 #endif
674 
675  if (!tests[0].func || !cpus[0].flag) {
676  fprintf(stderr, "checkasm: no tests to perform\n");
677  return 0;
678  }
679 
680  while (argc > 1) {
681  if (!strncmp(argv[1], "--bench", 7)) {
682  if (bench_init() < 0)
683  return 1;
684  if (argv[1][7] == '=') {
685  state.bench_pattern = argv[1] + 8;
686  state.bench_pattern_len = strlen(state.bench_pattern);
687  } else
688  state.bench_pattern = "";
689  } else if (!strncmp(argv[1], "--test=", 7)) {
690  state.test_name = argv[1] + 7;
691  } else if (!strcmp(argv[1], "--verbose") || !strcmp(argv[1], "-v")) {
692  state.verbose = 1;
693  } else {
694  seed = strtoul(argv[1], NULL, 10);
695  }
696 
697  argc--;
698  argv++;
699  }
700 
701  fprintf(stderr, "checkasm: using random seed %u\n", seed);
702  av_lfg_init(&checkasm_lfg, seed);
703 
704  check_cpu_flag(NULL, 0);
705  for (i = 0; cpus[i].flag; i++)
706  check_cpu_flag(cpus[i].name, cpus[i].flag);
707 
708  if (state.num_failed) {
709  fprintf(stderr, "checkasm: %d of %d tests have failed\n", state.num_failed, state.num_checked);
710  ret = 1;
711  } else {
712  fprintf(stderr, "checkasm: all %d tests passed\n", state.num_checked);
713  if (state.bench_pattern) {
714  print_benchs(state.funcs);
715  }
716  }
717 
718  destroy_func_tree(state.funcs);
719  bench_uninit();
720  return ret;
721 }
722 
723 /* Decide whether or not the specified function needs to be tested and
724  * allocate/initialize data structures if needed. Returns a pointer to a
725  * reference function if the function should be tested, otherwise NULL */
726 void *checkasm_check_func(void *func, const char *name, ...)
727 {
728  char name_buf[256];
729  void *ref = func;
731  int name_length;
732  va_list arg;
733 
734  va_start(arg, name);
735  name_length = vsnprintf(name_buf, sizeof(name_buf), name, arg);
736  va_end(arg);
737 
738  if (!func || name_length <= 0 || name_length >= sizeof(name_buf))
739  return NULL;
740 
741  state.current_func = get_func(&state.funcs, name_buf);
742  state.funcs->color = 1;
743  v = &state.current_func->versions;
744 
745  if (v->func) {
746  CheckasmFuncVersion *prev;
747  do {
748  /* Only test functions that haven't already been tested */
749  if (v->func == func)
750  return NULL;
751 
752  if (v->ok)
753  ref = v->func;
754 
755  prev = v;
756  } while ((v = v->next));
757 
758  v = prev->next = checkasm_malloc(sizeof(CheckasmFuncVersion));
759  }
760 
761  v->func = func;
762  v->ok = 1;
763  v->cpu = state.cpu_flag;
764  state.current_func_ver = v;
765 
766  if (state.cpu_flag)
767  state.num_checked++;
768 
769  return ref;
770 }
771 
772 /* Decide whether or not the current function needs to be benchmarked */
774 {
775  return !state.num_failed && state.bench_pattern &&
776  !strncmp(state.current_func->name, state.bench_pattern, state.bench_pattern_len);
777 }
778 
779 /* Indicate that the current test has failed */
780 void checkasm_fail_func(const char *msg, ...)
781 {
782  if (state.current_func_ver->cpu && state.current_func_ver->ok) {
783  va_list arg;
784 
785  print_cpu_name();
786  fprintf(stderr, " %s_%s (", state.current_func->name, cpu_suffix(state.current_func_ver->cpu));
787  va_start(arg, msg);
788  vfprintf(stderr, msg, arg);
789  va_end(arg);
790  fprintf(stderr, ")\n");
791 
792  state.current_func_ver->ok = 0;
793  state.num_failed++;
794  }
795 }
796 
797 /* Get the benchmark context of the current function */
799 {
800  CheckasmPerf *perf = &state.current_func_ver->perf;
801  memset(perf, 0, sizeof(*perf));
802  perf->sysfd = state.sysfd;
803  return perf;
804 }
805 
806 /* Print the outcome of all tests performed since the last time this function was called */
807 void checkasm_report(const char *name, ...)
808 {
809  static int prev_checked, prev_failed, max_length;
810 
811  if (state.num_checked > prev_checked) {
812  int pad_length = max_length + 4;
813  va_list arg;
814 
815  print_cpu_name();
816  pad_length -= fprintf(stderr, " - %s.", state.current_test_name);
817  va_start(arg, name);
818  pad_length -= vfprintf(stderr, name, arg);
819  va_end(arg);
820  fprintf(stderr, "%*c", FFMAX(pad_length, 0) + 2, '[');
821 
822  if (state.num_failed == prev_failed)
823  color_printf(COLOR_GREEN, "OK");
824  else
825  color_printf(COLOR_RED, "FAILED");
826  fprintf(stderr, "]\n");
827 
828  prev_checked = state.num_checked;
829  prev_failed = state.num_failed;
830  } else if (!state.cpu_flag) {
831  /* Calculate the amount of padding required to make the output vertically aligned */
832  int length = strlen(state.current_test_name);
833  va_list arg;
834 
835  va_start(arg, name);
836  length += vsnprintf(NULL, 0, name, arg);
837  va_end(arg);
838 
839  if (length > max_length)
840  max_length = length;
841  }
842 }
843 
844 #define DEF_CHECKASM_CHECK_FUNC(type, fmt) \
845 int checkasm_check_##type(const char *const file, const int line, \
846  const type *buf1, ptrdiff_t stride1, \
847  const type *buf2, ptrdiff_t stride2, \
848  const int w, int h, const char *const name) \
849 { \
850  int y = 0; \
851  stride1 /= sizeof(*buf1); \
852  stride2 /= sizeof(*buf2); \
853  for (y = 0; y < h; y++) \
854  if (memcmp(&buf1[y*stride1], &buf2[y*stride2], w*sizeof(*buf1))) \
855  break; \
856  if (y == h) \
857  return 0; \
858  checkasm_fail_func("%s:%d", file, line); \
859  if (!state.verbose) \
860  return 1; \
861  fprintf(stderr, "%s:\n", name); \
862  while (h--) { \
863  for (int x = 0; x < w; x++) \
864  fprintf(stderr, " " fmt, buf1[x]); \
865  fprintf(stderr, " "); \
866  for (int x = 0; x < w; x++) \
867  fprintf(stderr, " " fmt, buf2[x]); \
868  fprintf(stderr, " "); \
869  for (int x = 0; x < w; x++) \
870  fprintf(stderr, "%c", buf1[x] != buf2[x] ? 'x' : '.'); \
871  buf1 += stride1; \
872  buf2 += stride2; \
873  fprintf(stderr, "\n"); \
874  } \
875  return 1; \
876 }
877 
879 DEF_CHECKASM_CHECK_FUNC(uint16_t, "%04x")
880 DEF_CHECKASM_CHECK_FUNC(int16_t, "%6d")
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
const char * name
Definition: checkasm.c:72
static int bench_init_ffmpeg(void)
Definition: checkasm.c:630
static int cmp_nop(const void *a, const void *b)
Definition: checkasm.c:457
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren&#39;t used.
Definition: cpu.h:49
#define NULL
Definition: coverity.c:32
#define AV_CPU_FLAG_ALTIVEC
standard
Definition: cpu.h:60
void checkasm_check_v210enc(void)
Definition: v210enc.c:81
static int measure_nop_time(void)
Definition: checkasm.c:463
static void bench_uninit(void)
Definition: checkasm.c:657
static struct @314 state
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:206
CheckasmFunc * current_func
Definition: checkasm.c:257
int float_near_abs_eps_array(const float *a, const float *b, float eps, unsigned len)
Definition: checkasm.c:325
static int is_negative(union av_intfloat32 u)
Definition: checkasm.c:279
uint64_t cycles
Definition: checkasm.h:213
CheckasmPerf * checkasm_get_perf_context(void)
Definition: checkasm.c:798
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:35
void checkasm_check_vp9dsp(void)
Definition: vp9dsp.c:625
void checkasm_check_vf_threshold(void)
Definition: vf_threshold.c:78
#define vsnprintf
Definition: snprintf.h:36
void checkasm_check_flacdsp(void)
Definition: flacdsp.c:56
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
#define AV_CPU_FLAG_CMOV
supports cmov instruction
Definition: cpu.h:53
void checkasm_check_h264pred(void)
Definition: h264pred.c:232
#define AV_CPU_FLAG_VFP
Definition: cpu.h:67
static const char * cpu_suffix(int cpu)
Definition: checkasm.c:446
void checkasm_check_afir(void)
Definition: af_afir.c:79
CheckasmFuncVersion * current_func_ver
Definition: checkasm.c:258
const char * test_name
Definition: checkasm.c:271
static const struct @313 cpus[]
void checkasm_check_alacdsp(void)
Definition: alacdsp.c:115
static int cmp_func_names(const char *a, const char *b)
Definition: checkasm.c:506
int float_near_abs_eps(float a, float b, float eps)
Definition: checkasm.c:314
void * checkasm_check_func(void *func, const char *name,...)
Definition: checkasm.c:726
void checkasm_check_aacpsdsp(void)
Definition: aacpsdsp.c:233
CheckasmPerf perf
Definition: checkasm.c:243
void checkasm_check_colorspace(void)
void checkasm_check_vp8dsp(void)
Definition: vp8dsp.c:507
struct CheckasmFunc * child[2]
Definition: checkasm.c:248
uint8_t
const char * cpu_flag_name
Definition: checkasm.c:270
int checkasm_bench_func(void)
Definition: checkasm.c:773
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Definition: cpu.h:55
char name[1]
Definition: checkasm.c:251
#define AV_CPU_FLAG_NEON
Definition: cpu.h:69
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:32
int main(int argc, char *argv[])
Definition: checkasm.c:665
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:45
#define COLOR_YELLOW
Definition: checkasm.c:53
void checkasm_check_sbrdsp(void)
Definition: sbrdsp.c:252
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren&#39;t used.
Definition: cpu.h:54
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
Definition: cpu.h:37
void checkasm_check_h264qpel(void)
Definition: h264qpel.c:50
ptrdiff_t size
Definition: opengl_enc.c:100
CheckasmFunc * funcs
Definition: checkasm.c:256
void checkasm_check_jpeg2000dsp(void)
Definition: jpeg2000dsp.c:91
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
Definition: cpu.h:51
void checkasm_check_llviddspenc(void)
Definition: llviddspenc.c:104
int flag
Definition: checkasm.c:199
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:47
#define isatty(fd)
Definition: checkasm.c:61
static CheckasmFunc * get_func(CheckasmFunc **root, const char *name)
Definition: checkasm.c:550
CheckasmFuncVersion versions
Definition: checkasm.c:249
const char * suffix
Definition: checkasm.c:198
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
Definition: cpu.h:43
static const struct @312 tests[]
int float_near_ulp(float a, float b, unsigned max_ulp)
Definition: checkasm.c:284
void checkasm_check_h264dsp(void)
Definition: h264dsp.c:441
int num_checked
Definition: checkasm.c:262
#define COLOR_GREEN
Definition: checkasm.c:52
const char * r
Definition: vf_curves.c:114
const char * arg
Definition: jacosubdec.c:66
#define AV_CPU_FLAG_ARMV6T2
Definition: cpu.h:66
GLsizei GLsizei * length
Definition: opengl_enc.c:114
void checkasm_check_hevc_add_res(void)
Definition: hevc_add_res.c:85
static int bench_init(void)
Definition: checkasm.c:642
AVLFG checkasm_lfg
Definition: checkasm.c:276
#define AV_CPU_FLAG_AVX512
AVX-512 functions: requires OS support even if YMM/ZMM registers aren&#39;t used.
Definition: cpu.h:58
#define AV_CPU_FLAG_VFP_VM
VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations.
Definition: cpu.h:71
#define FFMAX(a, b)
Definition: common.h:94
void checkasm_check_videodsp(void)
Definition: videodsp.c:80
#define AV_CPU_FLAG_ARMV5TE
Definition: cpu.h:64
void checkasm_check_fixed_dsp(void)
Definition: fixed_dsp.c:132
#define b
Definition: input.c:41
static void print_benchs(CheckasmFunc *f)
Definition: checkasm.c:484
#define have_neon(flags)
Definition: cpu.h:26
void checkasm_check_utvideodsp(void)
Definition: utvideodsp.c:90
void checkasm_check_audiodsp(void)
Definition: audiodsp.c:51
#define AV_CPU_FLAG_SSE3
Prescott SSE3 functions.
Definition: cpu.h:40
void checkasm_check_nlmeans(void)
Definition: vf_nlmeans.c:31
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void checkasm_check_sw_rgb(void)
Definition: sw_rgb.c:181
#define is_red(f)
Definition: checkasm.c:531
int32_t
void checkasm_check_exrdsp(void)
Definition: exrdsp.c:76
uint32_t i
Definition: intfloat.h:28
static av_always_inline int cmp(MpegEncContext *s, const int x, const int y, const int subx, const int suby, const int size, const int h, int ref_index, int src_index, me_cmp_func cmp_func, me_cmp_func chroma_cmp_func, const int flags)
compares a block (either a full macroblock or a partition thereof) against a proposed motion-compensa...
Definition: motion_est.c:260
int dummy
Definition: motion.c:64
#define AV_CPU_FLAG_VFPV3
Definition: cpu.h:68
static void * checkasm_malloc(size_t size)
Definition: checkasm.c:434
const char * bench_pattern
Definition: checkasm.c:260
int iterations
Definition: checkasm.h:214
int bench_pattern_len
Definition: checkasm.c:261
void checkasm_report(const char *name,...)
Definition: checkasm.c:807
#define DEF_CHECKASM_CHECK_FUNC(type, fmt)
Definition: checkasm.c:844
void checkasm_check_hevc_idct(void)
Definition: hevc_idct.c:86
#define FF_ARRAY_ELEMS(a)
int cpu_flag
Definition: checkasm.c:269
int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp, unsigned len)
Definition: checkasm.c:302
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
Definition: cpu.h:34
int nop_time
Definition: checkasm.c:266
int double_near_abs_eps(double a, double b, double eps)
Definition: checkasm.c:354
void checkasm_check_vf_eq(void)
Definition: vf_eq.c:75
#define AV_CPU_FLAG_ARMV6
Definition: cpu.h:65
int num_failed
Definition: checkasm.c:263
#define AV_CPU_FLAG_SSE3SLOW
SSE3 supported, but usually not faster.
Definition: cpu.h:41
#define COLOR_RED
Definition: checkasm.c:51
void(* func)(void)
Definition: checkasm.c:73
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:31
static unsigned int seed
Definition: videogen.c:78
void checkasm_check_fmtconvert(void)
Definition: fmtconvert.c:44
#define PERF_START(t)
Definition: checkasm.h:262
static CheckasmFunc * rotate_tree(CheckasmFunc *f, int dir)
Definition: checkasm.c:521
int verbose
Definition: checkasm.c:272
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
Definition: cpu.h:52
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
Definition: cpu.h:46
#define AV_CPU_FLAG_AESNI
Advanced Encryption Standard functions.
Definition: cpu.h:48
#define AV_CPU_FLAG_VSX
ISA 2.06.
Definition: cpu.h:61
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:32
int sysfd
Definition: checkasm.c:267
void checkasm_check_llviddsp(void)
Definition: llviddsp.c:195
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
int double_near_abs_eps_array(const double *a, const double *b, double eps, unsigned len)
Definition: checkasm.c:361
static void color_printf(int color, const char *fmt,...)
Definition: checkasm.c:374
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
Definition: cpu.h:39
void checkasm_check_float_dsp(void)
Definition: float_dsp.c:280
#define AV_CPU_FLAG_POWER8
ISA 2.07.
Definition: cpu.h:62
void checkasm_check_huffyuvdsp(void)
Definition: huffyuvdsp.c:67
void checkasm_check_vf_gblur(void)
Definition: vf_gblur.c:36
void checkasm_check_opusdsp(void)
Definition: opusdsp.c:83
int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
Definition: checkasm.c:337
static void destroy_func_tree(CheckasmFunc *f)
Definition: checkasm.c:417
common internal and external API header
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
struct CheckasmFuncVersion * next
Definition: checkasm.c:239
#define AV_CPU_FLAG_ARMV8
Definition: cpu.h:70
const char * current_test_name
Definition: checkasm.c:259
static void check_cpu_flag(const char *name, int flag)
Definition: checkasm.c:575
static int use_color
Definition: log.c:121
void checkasm_check_v210dec(void)
Definition: v210dec.c:47
#define have_vfp(flags)
Definition: cpu.h:27
int len
printf("static const uint8_t my_array[100] = {\n")
void checkasm_check_pixblockdsp(void)
Definition: pixblockdsp.c:81
void checkasm_check_hevc_sao(void)
Definition: hevc_sao.c:131
#define PERF_STOP(t)
Definition: checkasm.h:263
void checkasm_check_synth_filter(void)
Definition: synth_filter.c:44
int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps, unsigned max_ulp, unsigned len)
Definition: checkasm.c:342
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:36
uint32_t av_get_random_seed(void)
Get a seed to use in conjunction with random functions.
Definition: random_seed.c:120
void checkasm_fail_func(const char *msg,...)
Definition: checkasm.c:780
void checkasm_check_bswapdsp(void)
Definition: bswapdsp.c:59
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:65
void checkasm_check_g722dsp(void)
Definition: g722dsp.c:53
void checkasm_check_sw_scale(void)
Definition: sw_scale.c:130
static void balance_tree(CheckasmFunc **root)
Definition: checkasm.c:534
void checkasm_check_vf_hflip(void)
Definition: vf_hflip.c:69
void checkasm_check_blend(void)
Definition: vf_blend.c:88
#define av_unused
Definition: attributes.h:131
const char * name
Definition: opengl_enc.c:102
static void print_cpu_name(void)
Definition: checkasm.c:598
void checkasm_check_blockdsp(void)
Definition: blockdsp.c:54
uint8_t color
Definition: checkasm.c:250