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 #include "config_components.h"
25 
26 #ifndef _GNU_SOURCE
27 # define _GNU_SOURCE // for syscall (performance monitoring API), strsignal()
28 #endif
29 
30 #include <signal.h>
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_FLAC_DECODER
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_H264CHROMA
108  { "h264chroma", checkasm_check_h264chroma },
109  #endif
110  #if CONFIG_H264DSP
111  { "h264dsp", checkasm_check_h264dsp },
112  #endif
113  #if CONFIG_H264PRED
114  { "h264pred", checkasm_check_h264pred },
115  #endif
116  #if CONFIG_H264QPEL
117  { "h264qpel", checkasm_check_h264qpel },
118  #endif
119  #if CONFIG_HEVC_DECODER
120  { "hevc_add_res", checkasm_check_hevc_add_res },
121  { "hevc_deblock", checkasm_check_hevc_deblock },
122  { "hevc_idct", checkasm_check_hevc_idct },
123  { "hevc_pel", checkasm_check_hevc_pel },
124  { "hevc_sao", checkasm_check_hevc_sao },
125  #endif
126  #if CONFIG_HUFFYUV_DECODER
127  { "huffyuvdsp", checkasm_check_huffyuvdsp },
128  #endif
129  #if CONFIG_IDCTDSP
130  { "idctdsp", checkasm_check_idctdsp },
131  #endif
132  #if CONFIG_JPEG2000_DECODER
133  { "jpeg2000dsp", checkasm_check_jpeg2000dsp },
134  #endif
135  #if CONFIG_LLAUDDSP
136  { "llauddsp", checkasm_check_llauddsp },
137  #endif
138  #if CONFIG_HUFFYUVDSP
139  { "llviddsp", checkasm_check_llviddsp },
140  #endif
141  #if CONFIG_LLVIDENCDSP
142  { "llviddspenc", checkasm_check_llviddspenc },
143  #endif
144  #if CONFIG_LPC
145  { "lpc", checkasm_check_lpc },
146  #endif
147  #if CONFIG_ME_CMP
148  { "motion", checkasm_check_motion },
149  #endif
150  #if CONFIG_OPUS_DECODER
151  { "opusdsp", checkasm_check_opusdsp },
152  #endif
153  #if CONFIG_PIXBLOCKDSP
154  { "pixblockdsp", checkasm_check_pixblockdsp },
155  #endif
156  #if CONFIG_UTVIDEO_DECODER
157  { "utvideodsp", checkasm_check_utvideodsp },
158  #endif
159  #if CONFIG_V210_DECODER
160  { "v210dec", checkasm_check_v210dec },
161  #endif
162  #if CONFIG_V210_ENCODER
163  { "v210enc", checkasm_check_v210enc },
164  #endif
165  #if CONFIG_VC1DSP
166  { "vc1dsp", checkasm_check_vc1dsp },
167  #endif
168  #if CONFIG_VP8DSP
169  { "vp8dsp", checkasm_check_vp8dsp },
170  #endif
171  #if CONFIG_VP9_DECODER
172  { "vp9dsp", checkasm_check_vp9dsp },
173  #endif
174  #if CONFIG_VIDEODSP
175  { "videodsp", checkasm_check_videodsp },
176  #endif
177  #if CONFIG_VORBIS_DECODER
178  { "vorbisdsp", checkasm_check_vorbisdsp },
179  #endif
180 #endif
181 #if CONFIG_AVFILTER
182  #if CONFIG_AFIR_FILTER
183  { "af_afir", checkasm_check_afir },
184  #endif
185  #if CONFIG_BLEND_FILTER
186  { "vf_blend", checkasm_check_blend },
187  #endif
188  #if CONFIG_BWDIF_FILTER
189  { "vf_bwdif", checkasm_check_vf_bwdif },
190  #endif
191  #if CONFIG_COLORSPACE_FILTER
192  { "vf_colorspace", checkasm_check_colorspace },
193  #endif
194  #if CONFIG_EQ_FILTER
195  { "vf_eq", checkasm_check_vf_eq },
196  #endif
197  #if CONFIG_GBLUR_FILTER
198  { "vf_gblur", checkasm_check_vf_gblur },
199  #endif
200  #if CONFIG_HFLIP_FILTER
201  { "vf_hflip", checkasm_check_vf_hflip },
202  #endif
203  #if CONFIG_NLMEANS_FILTER
204  { "vf_nlmeans", checkasm_check_nlmeans },
205  #endif
206  #if CONFIG_THRESHOLD_FILTER
207  { "vf_threshold", checkasm_check_vf_threshold },
208  #endif
209  #if CONFIG_SOBEL_FILTER
210  { "vf_sobel", checkasm_check_vf_sobel },
211  #endif
212 #endif
213 #if CONFIG_SWSCALE
214  { "sw_gbrp", checkasm_check_sw_gbrp },
215  { "sw_rgb", checkasm_check_sw_rgb },
216  { "sw_scale", checkasm_check_sw_scale },
217 #endif
218 #if CONFIG_AVUTIL
219  { "fixed_dsp", checkasm_check_fixed_dsp },
220  { "float_dsp", checkasm_check_float_dsp },
221  { "av_tx", checkasm_check_av_tx },
222 #endif
223  { NULL }
224 };
225 
226 /* List of cpu flags to check */
227 static const struct {
228  const char *name;
229  const char *suffix;
230  int flag;
231 } cpus[] = {
232 #if ARCH_AARCH64
233  { "ARMV8", "armv8", AV_CPU_FLAG_ARMV8 },
234  { "NEON", "neon", AV_CPU_FLAG_NEON },
235  { "DOTPROD", "dotprod", AV_CPU_FLAG_DOTPROD },
236  { "I8MM", "i8mm", AV_CPU_FLAG_I8MM },
237 #elif ARCH_ARM
238  { "ARMV5TE", "armv5te", AV_CPU_FLAG_ARMV5TE },
239  { "ARMV6", "armv6", AV_CPU_FLAG_ARMV6 },
240  { "ARMV6T2", "armv6t2", AV_CPU_FLAG_ARMV6T2 },
241  { "VFP", "vfp", AV_CPU_FLAG_VFP },
242  { "VFP_VM", "vfp_vm", AV_CPU_FLAG_VFP_VM },
243  { "VFPV3", "vfp3", AV_CPU_FLAG_VFPV3 },
244  { "NEON", "neon", AV_CPU_FLAG_NEON },
245 #elif ARCH_PPC
246  { "ALTIVEC", "altivec", AV_CPU_FLAG_ALTIVEC },
247  { "VSX", "vsx", AV_CPU_FLAG_VSX },
248  { "POWER8", "power8", AV_CPU_FLAG_POWER8 },
249 #elif ARCH_RISCV
250  { "RVI", "rvi", AV_CPU_FLAG_RVI },
251  { "RVF", "rvf", AV_CPU_FLAG_RVF },
252  { "RVD", "rvd", AV_CPU_FLAG_RVD },
253  { "RVBaddr", "rvb_a", AV_CPU_FLAG_RVB_ADDR },
254  { "RVBbasic", "rvb_b", AV_CPU_FLAG_RVB_BASIC },
255  { "RVVi32", "rvv_i32", AV_CPU_FLAG_RVV_I32 },
256  { "RVVf32", "rvv_f32", AV_CPU_FLAG_RVV_F32 },
257  { "RVVi64", "rvv_i64", AV_CPU_FLAG_RVV_I64 },
258  { "RVVf64", "rvv_f64", AV_CPU_FLAG_RVV_F64 },
259 #elif ARCH_MIPS
260  { "MMI", "mmi", AV_CPU_FLAG_MMI },
261  { "MSA", "msa", AV_CPU_FLAG_MSA },
262 #elif ARCH_X86
263  { "MMX", "mmx", AV_CPU_FLAG_MMX|AV_CPU_FLAG_CMOV },
264  { "MMXEXT", "mmxext", AV_CPU_FLAG_MMXEXT },
265  { "3DNOW", "3dnow", AV_CPU_FLAG_3DNOW },
266  { "3DNOWEXT", "3dnowext", AV_CPU_FLAG_3DNOWEXT },
267  { "SSE", "sse", AV_CPU_FLAG_SSE },
268  { "SSE2", "sse2", AV_CPU_FLAG_SSE2|AV_CPU_FLAG_SSE2SLOW },
269  { "SSE3", "sse3", AV_CPU_FLAG_SSE3|AV_CPU_FLAG_SSE3SLOW },
270  { "SSSE3", "ssse3", AV_CPU_FLAG_SSSE3|AV_CPU_FLAG_ATOM },
271  { "SSE4.1", "sse4", AV_CPU_FLAG_SSE4 },
272  { "SSE4.2", "sse42", AV_CPU_FLAG_SSE42 },
273  { "AES-NI", "aesni", AV_CPU_FLAG_AESNI },
274  { "AVX", "avx", AV_CPU_FLAG_AVX },
275  { "XOP", "xop", AV_CPU_FLAG_XOP },
276  { "FMA3", "fma3", AV_CPU_FLAG_FMA3 },
277  { "FMA4", "fma4", AV_CPU_FLAG_FMA4 },
278  { "AVX2", "avx2", AV_CPU_FLAG_AVX2 },
279  { "AVX-512", "avx512", AV_CPU_FLAG_AVX512 },
280  { "AVX-512ICL", "avx512icl", AV_CPU_FLAG_AVX512ICL },
281 #elif ARCH_LOONGARCH
282  { "LSX", "lsx", AV_CPU_FLAG_LSX },
283  { "LASX", "lasx", AV_CPU_FLAG_LASX },
284 #endif
285  { NULL }
286 };
287 
288 typedef struct CheckasmFuncVersion {
290  void *func;
291  int ok;
292  int cpu;
295 
296 /* Binary search tree node */
297 typedef struct CheckasmFunc {
298  struct CheckasmFunc *child[2];
300  uint8_t color; /* 0 = red, 1 = black */
301  char name[1];
302 } CheckasmFunc;
303 
304 /* Internal state */
305 static struct {
309  const char *current_test_name;
310  const char *bench_pattern;
314 
315  /* perf */
316  int nop_time;
317  int sysfd;
318 
319  int cpu_flag;
320  const char *cpu_flag_name;
321  const char *test_name;
322  int verbose;
323 } state;
324 
325 /* PRNG state */
327 
328 /* float compare support code */
329 static int is_negative(union av_intfloat32 u)
330 {
331  return u.i >> 31;
332 }
333 
334 int float_near_ulp(float a, float b, unsigned max_ulp)
335 {
336  union av_intfloat32 x, y;
337 
338  x.f = a;
339  y.f = b;
340 
341  if (is_negative(x) != is_negative(y)) {
342  // handle -0.0 == +0.0
343  return a == b;
344  }
345 
346  if (llabs((int64_t)x.i - y.i) <= max_ulp)
347  return 1;
348 
349  return 0;
350 }
351 
352 int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
353  unsigned len)
354 {
355  unsigned i;
356 
357  for (i = 0; i < len; i++) {
358  if (!float_near_ulp(a[i], b[i], max_ulp))
359  return 0;
360  }
361  return 1;
362 }
363 
364 int float_near_abs_eps(float a, float b, float eps)
365 {
366  float abs_diff = fabsf(a - b);
367  if (abs_diff < eps)
368  return 1;
369 
370  fprintf(stderr, "test failed comparing %g with %g (abs diff=%g with EPS=%g)\n", a, b, abs_diff, eps);
371 
372  return 0;
373 }
374 
375 int float_near_abs_eps_array(const float *a, const float *b, float eps,
376  unsigned len)
377 {
378  unsigned i;
379 
380  for (i = 0; i < len; i++) {
381  if (!float_near_abs_eps(a[i], b[i], eps))
382  return 0;
383  }
384  return 1;
385 }
386 
387 int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
388 {
389  return float_near_ulp(a, b, max_ulp) || float_near_abs_eps(a, b, eps);
390 }
391 
392 int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
393  unsigned max_ulp, unsigned len)
394 {
395  unsigned i;
396 
397  for (i = 0; i < len; i++) {
398  if (!float_near_abs_eps_ulp(a[i], b[i], eps, max_ulp))
399  return 0;
400  }
401  return 1;
402 }
403 
404 int double_near_abs_eps(double a, double b, double eps)
405 {
406  double abs_diff = fabs(a - b);
407 
408  return abs_diff < eps;
409 }
410 
411 int double_near_abs_eps_array(const double *a, const double *b, double eps,
412  unsigned len)
413 {
414  unsigned i;
415 
416  for (i = 0; i < len; i++) {
417  if (!double_near_abs_eps(a[i], b[i], eps))
418  return 0;
419  }
420  return 1;
421 }
422 
423 /* Print colored text to stderr if the terminal supports it */
424 static void color_printf(int color, const char *fmt, ...)
425 {
426  static int use_color = -1;
427  va_list arg;
428 
429 #if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
430  static HANDLE con;
431  static WORD org_attributes;
432 
433  if (use_color < 0) {
434  CONSOLE_SCREEN_BUFFER_INFO con_info;
435  con = GetStdHandle(STD_ERROR_HANDLE);
436  if (con && con != INVALID_HANDLE_VALUE && GetConsoleScreenBufferInfo(con, &con_info)) {
437  org_attributes = con_info.wAttributes;
438  use_color = 1;
439  } else
440  use_color = 0;
441  }
442  if (use_color)
443  SetConsoleTextAttribute(con, (org_attributes & 0xfff0) | (color & 0x0f));
444 #else
445  if (use_color < 0) {
446  const char *term = getenv("TERM");
447  use_color = term && strcmp(term, "dumb") && isatty(2);
448  }
449  if (use_color)
450  fprintf(stderr, "\x1b[%d;3%dm", (color & 0x08) >> 3, color & 0x07);
451 #endif
452 
453  va_start(arg, fmt);
454  vfprintf(stderr, fmt, arg);
455  va_end(arg);
456 
457  if (use_color) {
458 #if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
459  SetConsoleTextAttribute(con, org_attributes);
460 #else
461  fprintf(stderr, "\x1b[0m");
462 #endif
463  }
464 }
465 
466 /* Deallocate a tree */
468 {
469  if (f) {
470  CheckasmFuncVersion *v = f->versions.next;
471  while (v) {
472  CheckasmFuncVersion *next = v->next;
473  free(v);
474  v = next;
475  }
476 
477  destroy_func_tree(f->child[0]);
478  destroy_func_tree(f->child[1]);
479  free(f);
480  }
481 }
482 
483 /* Allocate a zero-initialized block, clean up and exit on failure */
484 static void *checkasm_malloc(size_t size)
485 {
486  void *ptr = calloc(1, size);
487  if (!ptr) {
488  fprintf(stderr, "checkasm: malloc failed\n");
489  destroy_func_tree(state.funcs);
490  exit(1);
491  }
492  return ptr;
493 }
494 
495 /* Get the suffix of the specified cpu flag */
496 static const char *cpu_suffix(int cpu)
497 {
498  int i = FF_ARRAY_ELEMS(cpus);
499 
500  while (--i >= 0)
501  if (cpu & cpus[i].flag)
502  return cpus[i].suffix;
503 
504  return "c";
505 }
506 
507 static int cmp_nop(const void *a, const void *b)
508 {
509  return *(const uint16_t*)a - *(const uint16_t*)b;
510 }
511 
512 /* Measure the overhead of the timing code (in decicycles) */
513 static int measure_nop_time(void)
514 {
515  uint16_t nops[10000];
516  int i, nop_sum = 0;
517  av_unused const int sysfd = state.sysfd;
518 
519  uint64_t t = 0;
520  for (i = 0; i < 10000; i++) {
521  PERF_START(t);
522  PERF_STOP(t);
523  nops[i] = t;
524  }
525 
526  qsort(nops, 10000, sizeof(uint16_t), cmp_nop);
527  for (i = 2500; i < 7500; i++)
528  nop_sum += nops[i];
529 
530  return nop_sum / 500;
531 }
532 
533 /* Print benchmark results */
535 {
536  if (f) {
537  print_benchs(f->child[0]);
538 
539  /* Only print functions with at least one assembly version */
540  if (f->versions.cpu || f->versions.next) {
541  CheckasmFuncVersion *v = &f->versions;
542  do {
543  CheckasmPerf *p = &v->perf;
544  if (p->iterations) {
545  int decicycles = (10*p->cycles/p->iterations - state.nop_time) / 4;
546  printf("%s_%s: %d.%d\n", f->name, cpu_suffix(v->cpu), decicycles/10, decicycles%10);
547  }
548  } while ((v = v->next));
549  }
550 
551  print_benchs(f->child[1]);
552  }
553 }
554 
555 /* ASCIIbetical sort except preserving natural order for numbers */
556 static int cmp_func_names(const char *a, const char *b)
557 {
558  const char *start = a;
559  int ascii_diff, digit_diff;
560 
561  for (; !(ascii_diff = *(const unsigned char*)a - *(const unsigned char*)b) && *a; a++, b++);
562  for (; av_isdigit(*a) && av_isdigit(*b); a++, b++);
563 
564  if (a > start && av_isdigit(a[-1]) && (digit_diff = av_isdigit(*a) - av_isdigit(*b)))
565  return digit_diff;
566 
567  return ascii_diff;
568 }
569 
570 /* Perform a tree rotation in the specified direction and return the new root */
572 {
573  CheckasmFunc *r = f->child[dir^1];
574  f->child[dir^1] = r->child[dir];
575  r->child[dir] = f;
576  r->color = f->color;
577  f->color = 0;
578  return r;
579 }
580 
581 #define is_red(f) ((f) && !(f)->color)
582 
583 /* Balance a left-leaning red-black tree at the specified node */
584 static void balance_tree(CheckasmFunc **root)
585 {
586  CheckasmFunc *f = *root;
587 
588  if (is_red(f->child[0]) && is_red(f->child[1])) {
589  f->color ^= 1;
590  f->child[0]->color = f->child[1]->color = 1;
591  }
592 
593  if (!is_red(f->child[0]) && is_red(f->child[1]))
594  *root = rotate_tree(f, 0); /* Rotate left */
595  else if (is_red(f->child[0]) && is_red(f->child[0]->child[0]))
596  *root = rotate_tree(f, 1); /* Rotate right */
597 }
598 
599 /* Get a node with the specified name, creating it if it doesn't exist */
600 static CheckasmFunc *get_func(CheckasmFunc **root, const char *name)
601 {
602  CheckasmFunc *f = *root;
603 
604  if (f) {
605  /* Search the tree for a matching node */
606  int cmp = cmp_func_names(name, f->name);
607  if (cmp) {
608  f = get_func(&f->child[cmp > 0], name);
609 
610  /* Rebalance the tree on the way up if a new node was inserted */
611  if (!f->versions.func)
612  balance_tree(root);
613  }
614  } else {
615  /* Allocate and insert a new node into the tree */
616  int name_length = strlen(name);
617  f = *root = checkasm_malloc(sizeof(CheckasmFunc) + name_length);
618  memcpy(f->name, name, name_length + 1);
619  }
620 
621  return f;
622 }
623 
624 /* Perform tests and benchmarks for the specified cpu flag if supported by the host */
625 static void check_cpu_flag(const char *name, int flag)
626 {
627  int old_cpu_flag = state.cpu_flag;
628 
629  flag |= old_cpu_flag;
630  av_force_cpu_flags(-1);
631  state.cpu_flag = flag & av_get_cpu_flags();
632  av_force_cpu_flags(state.cpu_flag);
633 
634  if (!flag || state.cpu_flag != old_cpu_flag) {
635  int i;
636 
637  state.cpu_flag_name = name;
638  for (i = 0; tests[i].func; i++) {
639  if (state.test_name && strcmp(tests[i].name, state.test_name))
640  continue;
641  state.current_test_name = tests[i].name;
642  tests[i].func();
643  }
644  }
645 }
646 
647 /* Print the name of the current CPU flag, but only do it once */
648 static void print_cpu_name(void)
649 {
650  if (state.cpu_flag_name) {
651  color_printf(COLOR_YELLOW, "%s:\n", state.cpu_flag_name);
652  state.cpu_flag_name = NULL;
653  }
654 }
655 
656 #if CONFIG_LINUX_PERF
657 static int bench_init_linux(void)
658 {
659  struct perf_event_attr attr = {
660  .type = PERF_TYPE_HARDWARE,
661  .size = sizeof(struct perf_event_attr),
662  .config = PERF_COUNT_HW_CPU_CYCLES,
663  .disabled = 1, // start counting only on demand
664  .exclude_kernel = 1,
665  .exclude_hv = 1,
666  };
667 
668  printf("benchmarking with Linux Perf Monitoring API\n");
669 
670  state.sysfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0);
671  if (state.sysfd == -1) {
672  perror("perf_event_open");
673  return -1;
674  }
675  return 0;
676 }
677 #elif CONFIG_MACOS_KPERF
678 static int bench_init_kperf(void)
679 {
680  ff_kperf_init();
681  return 0;
682 }
683 #else
684 static int bench_init_ffmpeg(void)
685 {
686 #ifdef AV_READ_TIME
687  printf("benchmarking with native FFmpeg timers\n");
688  return 0;
689 #else
690  fprintf(stderr, "checkasm: --bench is not supported on your system\n");
691  return -1;
692 #endif
693 }
694 #endif
695 
696 static int bench_init(void)
697 {
698 #if CONFIG_LINUX_PERF
699  int ret = bench_init_linux();
700 #elif CONFIG_MACOS_KPERF
701  int ret = bench_init_kperf();
702 #else
703  int ret = bench_init_ffmpeg();
704 #endif
705  if (ret < 0)
706  return ret;
707 
708  state.nop_time = measure_nop_time();
709  printf("nop: %d.%d\n", state.nop_time/10, state.nop_time%10);
710  return 0;
711 }
712 
713 static void bench_uninit(void)
714 {
715 #if CONFIG_LINUX_PERF
716  if (state.sysfd > 0)
717  close(state.sysfd);
718 #endif
719 }
720 
721 static int usage(const char *path)
722 {
723  fprintf(stderr,
724  "Usage: %s [--bench] [--test=<pattern>] [--verbose] [seed]\n",
725  path);
726  return 1;
727 }
728 
729 int main(int argc, char *argv[])
730 {
731  unsigned int seed = av_get_random_seed();
732  int i, ret = 0;
733 
734 #if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
736  checkasm_checked_call = checkasm_checked_call_vfp;
737 #endif
738 #if ARCH_RISCV
739  struct sigaction act = {
740  .sa_handler = checkasm_handle_signal,
741  .sa_flags = 0,
742  };
743 
744  sigaction(SIGILL, &act, NULL);
745 #endif
746 
747  if (!tests[0].func || !cpus[0].flag) {
748  fprintf(stderr, "checkasm: no tests to perform\n");
749  return 0;
750  }
751 
752  for (i = 1; i < argc; i++) {
753  const char *arg = argv[i];
754  unsigned long l;
755  char *end;
756 
757  if (!strncmp(arg, "--bench", 7)) {
758  if (bench_init() < 0)
759  return 1;
760  if (arg[7] == '=') {
761  state.bench_pattern = arg + 8;
762  state.bench_pattern_len = strlen(state.bench_pattern);
763  } else
764  state.bench_pattern = "";
765  } else if (!strncmp(arg, "--test=", 7)) {
766  state.test_name = arg + 7;
767  } else if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
768  state.verbose = 1;
769  } else if ((l = strtoul(arg, &end, 10)) <= UINT_MAX &&
770  *end == '\0') {
771  seed = l;
772  } else {
773  return usage(argv[0]);
774  }
775  }
776 
777  fprintf(stderr, "checkasm: using random seed %u\n", seed);
779 
780  check_cpu_flag(NULL, 0);
781  for (i = 0; cpus[i].flag; i++)
783 
784  if (state.num_failed) {
785  fprintf(stderr, "checkasm: %d of %d tests have failed\n", state.num_failed, state.num_checked);
786  ret = 1;
787  } else {
788  fprintf(stderr, "checkasm: all %d tests passed\n", state.num_checked);
789  if (state.bench_pattern) {
790  print_benchs(state.funcs);
791  }
792  }
793 
794  destroy_func_tree(state.funcs);
795  bench_uninit();
796  return ret;
797 }
798 
799 /* Decide whether or not the specified function needs to be tested and
800  * allocate/initialize data structures if needed. Returns a pointer to a
801  * reference function if the function should be tested, otherwise NULL */
802 void *checkasm_check_func(void *func, const char *name, ...)
803 {
804  char name_buf[256];
805  void *ref = func;
807  int name_length;
808  va_list arg;
809 
810  va_start(arg, name);
811  name_length = vsnprintf(name_buf, sizeof(name_buf), name, arg);
812  va_end(arg);
813 
814  if (!func || name_length <= 0 || name_length >= sizeof(name_buf))
815  return NULL;
816 
817  state.current_func = get_func(&state.funcs, name_buf);
818  state.funcs->color = 1;
819  v = &state.current_func->versions;
820 
821  if (v->func) {
822  CheckasmFuncVersion *prev;
823  do {
824  /* Only test functions that haven't already been tested */
825  if (v->func == func)
826  return NULL;
827 
828  if (v->ok)
829  ref = v->func;
830 
831  prev = v;
832  } while ((v = v->next));
833 
834  v = prev->next = checkasm_malloc(sizeof(CheckasmFuncVersion));
835  }
836 
837  v->func = func;
838  v->ok = 1;
839  v->cpu = state.cpu_flag;
840  state.current_func_ver = v;
841 
842  if (state.cpu_flag)
843  state.num_checked++;
844 
845  return ref;
846 }
847 
848 /* Decide whether or not the current function needs to be benchmarked */
850 {
851  return !state.num_failed && state.bench_pattern &&
852  !strncmp(state.current_func->name, state.bench_pattern, state.bench_pattern_len);
853 }
854 
855 /* Indicate that the current test has failed */
856 void checkasm_fail_func(const char *msg, ...)
857 {
858  if (state.current_func_ver->cpu && state.current_func_ver->ok) {
859  va_list arg;
860 
861  print_cpu_name();
862  fprintf(stderr, " %s_%s (", state.current_func->name, cpu_suffix(state.current_func_ver->cpu));
863  va_start(arg, msg);
864  vfprintf(stderr, msg, arg);
865  va_end(arg);
866  fprintf(stderr, ")\n");
867 
868  state.current_func_ver->ok = 0;
869  state.num_failed++;
870  }
871 }
872 
873 void checkasm_fail_signal(int signum)
874 {
875 #ifdef __GLIBC__
876  checkasm_fail_func("fatal signal %d: %s", signum, strsignal(signum));
877 #else
878  checkasm_fail_func("fatal signal %d", signum);
879 #endif
880 }
881 
882 /* Get the benchmark context of the current function */
884 {
885  CheckasmPerf *perf = &state.current_func_ver->perf;
886  memset(perf, 0, sizeof(*perf));
887  perf->sysfd = state.sysfd;
888  return perf;
889 }
890 
891 /* Print the outcome of all tests performed since the last time this function was called */
892 void checkasm_report(const char *name, ...)
893 {
894  static int prev_checked, prev_failed, max_length;
895 
896  if (state.num_checked > prev_checked) {
897  int pad_length = max_length + 4;
898  va_list arg;
899 
900  print_cpu_name();
901  pad_length -= fprintf(stderr, " - %s.", state.current_test_name);
902  va_start(arg, name);
903  pad_length -= vfprintf(stderr, name, arg);
904  va_end(arg);
905  fprintf(stderr, "%*c", FFMAX(pad_length, 0) + 2, '[');
906 
907  if (state.num_failed == prev_failed)
908  color_printf(COLOR_GREEN, "OK");
909  else
910  color_printf(COLOR_RED, "FAILED");
911  fprintf(stderr, "]\n");
912 
913  prev_checked = state.num_checked;
914  prev_failed = state.num_failed;
915  } else if (!state.cpu_flag) {
916  /* Calculate the amount of padding required to make the output vertically aligned */
917  int length = strlen(state.current_test_name);
918  va_list arg;
919 
920  va_start(arg, name);
921  length += vsnprintf(NULL, 0, name, arg);
922  va_end(arg);
923 
924  if (length > max_length)
925  max_length = length;
926  }
927 }
928 
929 #define DEF_CHECKASM_CHECK_FUNC(type, fmt) \
930 int checkasm_check_##type(const char *const file, const int line, \
931  const type *buf1, ptrdiff_t stride1, \
932  const type *buf2, ptrdiff_t stride2, \
933  const int w, int h, const char *const name) \
934 { \
935  int y = 0; \
936  stride1 /= sizeof(*buf1); \
937  stride2 /= sizeof(*buf2); \
938  for (y = 0; y < h; y++) \
939  if (memcmp(&buf1[y*stride1], &buf2[y*stride2], w*sizeof(*buf1))) \
940  break; \
941  if (y == h) \
942  return 0; \
943  checkasm_fail_func("%s:%d", file, line); \
944  if (!state.verbose) \
945  return 1; \
946  fprintf(stderr, "%s:\n", name); \
947  while (h--) { \
948  for (int x = 0; x < w; x++) \
949  fprintf(stderr, " " fmt, buf1[x]); \
950  fprintf(stderr, " "); \
951  for (int x = 0; x < w; x++) \
952  fprintf(stderr, " " fmt, buf2[x]); \
953  fprintf(stderr, " "); \
954  for (int x = 0; x < w; x++) \
955  fprintf(stderr, "%c", buf1[x] != buf2[x] ? 'x' : '.'); \
956  buf1 += stride1; \
957  buf2 += stride2; \
958  fprintf(stderr, "\n"); \
959  } \
960  return 1; \
961 }
962 
963 DEF_CHECKASM_CHECK_FUNC(uint8_t, "%02x")
964 DEF_CHECKASM_CHECK_FUNC(uint16_t, "%04x")
965 DEF_CHECKASM_CHECK_FUNC(uint32_t, "%08x")
966 DEF_CHECKASM_CHECK_FUNC(int16_t, "%6d")
checkasm_check_nlmeans
void checkasm_check_nlmeans(void)
Definition: vf_nlmeans.c:31
AV_CPU_FLAG_VFP
#define AV_CPU_FLAG_VFP
Definition: cpu.h:67
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void checkasm_check_sw_gbrp(void)
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int bench_pattern_len
Definition: checkasm.c:311
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void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:75
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void checkasm_check_vp8dsp(void)
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static const struct @362 tests[]
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AVLFG checkasm_lfg
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av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
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SSE3 supported, but usually not faster.
Definition: cpu.h:39
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const char * name
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Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
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int sysfd
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static void color_printf(int color, const char *fmt,...)
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Definition: cpu.h:90
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Definition: random_seed.c:167
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Definition: cpu.h:41
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AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used.
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int nop_time
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CheckasmPerf perf
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compares a block (either a full macroblock or a partition thereof) against a proposed motion-compensa...
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int iterations
Definition: checkasm.h:248
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int ok
Definition: checkasm.c:291
arg
const char * arg
Definition: jacosubdec.c:67
func
void(* func)(void)
Definition: checkasm.c:73
AV_CPU_FLAG_RVD
#define AV_CPU_FLAG_RVD
D (double precision FP)
Definition: cpu.h:86
fabs
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
NULL
#define NULL
Definition: coverity.c:32
measure_nop_time
static int measure_nop_time(void)
Definition: checkasm.c:513
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int double_near_abs_eps_array(const double *a, const double *b, double eps, unsigned len)
Definition: checkasm.c:411
AV_CPU_FLAG_LASX
#define AV_CPU_FLAG_LASX
Definition: cpu.h:81
AV_CPU_FLAG_AVX512ICL
#define AV_CPU_FLAG_AVX512ICL
F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ.
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void checkasm_check_fmtconvert(void)
Definition: fmtconvert.c:46
AV_CPU_FLAG_MSA
#define AV_CPU_FLAG_MSA
Definition: cpu.h:77
COLOR_GREEN
#define COLOR_GREEN
Definition: checkasm.c:52
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void checkasm_check_vorbisdsp(void)
Definition: vorbisdsp.c:78
cpu.h
av_intfloat32
Definition: intfloat.h:27
AV_CPU_FLAG_CMOV
#define AV_CPU_FLAG_CMOV
supports cmov instruction
Definition: cpu.h:51
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static unsigned int seed
Definition: videogen.c:78
AV_CPU_FLAG_ALTIVEC
#define AV_CPU_FLAG_ALTIVEC
standard
Definition: cpu.h:60
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static void print_benchs(CheckasmFunc *f)
Definition: checkasm.c:534
current_func
CheckasmFunc * current_func
Definition: checkasm.c:307
checkasm_fail_signal
void checkasm_fail_signal(int signum)
Definition: checkasm.c:873
AV_CPU_FLAG_I8MM
#define AV_CPU_FLAG_I8MM
Definition: cpu.h:73
checkasm_check_vc1dsp
void checkasm_check_vc1dsp(void)
Definition: vc1dsp.c:441
checkasm_check_h264chroma
void checkasm_check_h264chroma(void)
Definition: h264chroma.c:81
AV_CPU_FLAG_SSE2
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:34
CheckasmFunc::color
uint8_t color
Definition: checkasm.c:300
AVLFG
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
f
f
Definition: af_crystalizer.c:121
checkasm_check_llauddsp
void checkasm_check_llauddsp(void)
Definition: llauddsp.c:108
AV_CPU_FLAG_AVX
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:47
AV_CPU_FLAG_FMA4
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
Definition: cpu.h:50
cpu.h
AV_CPU_FLAG_AVX2
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:52
checkasm_check_llviddsp
void checkasm_check_llviddsp(void)
Definition: llviddsp.c:195
AV_CPU_FLAG_SSE2SLOW
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
Definition: cpu.h:35
AV_CPU_FLAG_NEON
#define AV_CPU_FLAG_NEON
Definition: cpu.h:69
size
int size
Definition: twinvq_data.h:10344
DEF_CHECKASM_CHECK_FUNC
#define DEF_CHECKASM_CHECK_FUNC(type, fmt)
Definition: checkasm.c:929
printf
printf("static const uint8_t my_array[100] = {\n")
sysfd
int sysfd
Definition: checkasm.c:317
have_neon
#define have_neon(flags)
Definition: cpu.h:26
CheckasmFuncVersion::func
void * func
Definition: checkasm.c:290
checkasm_check_h264pred
void checkasm_check_h264pred(void)
Definition: h264pred.c:233
av_isdigit
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:202
AV_CPU_FLAG_FMA3
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Definition: cpu.h:53
a
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:41
ff_kperf_init
void ff_kperf_init(void)
Definition: macos_kperf.c:99
checkasm_check_huffyuvdsp
void checkasm_check_huffyuvdsp(void)
Definition: huffyuvdsp.c:95
float_near_abs_eps_array_ulp
int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps, unsigned max_ulp, unsigned len)
Definition: checkasm.c:392
test_name
const char * test_name
Definition: checkasm.c:321
CheckasmPerf::cycles
uint64_t cycles
Definition: checkasm.h:247
checkasm_get_perf_context
CheckasmPerf * checkasm_get_perf_context(void)
Definition: checkasm.c:883
checkasm_check_fixed_dsp
void checkasm_check_fixed_dsp(void)
Definition: fixed_dsp.c:133
checkasm_check_colorspace
void checkasm_check_colorspace(void)
Definition: vf_colorspace.c:309
checkasm_check_utvideodsp
void checkasm_check_utvideodsp(void)
Definition: utvideodsp.c:91
is_negative
static int is_negative(union av_intfloat32 u)
Definition: checkasm.c:329
checkasm_check_audiodsp
void checkasm_check_audiodsp(void)
Definition: audiodsp.c:52
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
checkasm_check_flacdsp
void checkasm_check_flacdsp(void)
Definition: flacdsp.c:79
checkasm_check_func
void * checkasm_check_func(void *func, const char *name,...)
Definition: checkasm.c:802
AV_CPU_FLAG_SSE42
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:45
checkasm_check_idctdsp
void checkasm_check_idctdsp(void)
Definition: idctdsp.c:95
CheckasmFuncVersion::next
struct CheckasmFuncVersion * next
Definition: checkasm.c:289
vsnprintf
#define vsnprintf
Definition: snprintf.h:36
common.h
use_color
static int use_color
Definition: log.c:123
AV_CPU_FLAG_RVV_I32
#define AV_CPU_FLAG_RVV_I32
Vectors of 8/16/32-bit int's *‍/.
Definition: cpu.h:87
checkasm_check_synth_filter
void checkasm_check_synth_filter(void)
Definition: synth_filter.c:47
cmp_func_names
static int cmp_func_names(const char *a, const char *b)
Definition: checkasm.c:556
AV_CPU_FLAG_ARMV8
#define AV_CPU_FLAG_ARMV8
Definition: cpu.h:70
checkasm_check_lpc
void checkasm_check_lpc(void)
Definition: lpc.c:60
len
int len
Definition: vorbis_enc_data.h:426
checkasm_check_g722dsp
void checkasm_check_g722dsp(void)
Definition: g722dsp.c:53
PERF_STOP
#define PERF_STOP(t)
Definition: checkasm.h:302
is_red
#define is_red(f)
Definition: checkasm.c:581
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:43
have_vfp
#define have_vfp(flags)
Definition: cpu.h:27
checkasm_check_vf_hflip
void checkasm_check_vf_hflip(void)
Definition: vf_hflip.c:72
ret
ret
Definition: filter_design.txt:187
state
static struct @364 state
checkasm_check_blend
void checkasm_check_blend(void)
Definition: vf_blend.c:88
verbose
int verbose
Definition: checkasm.c:322
AV_CPU_FLAG_VFPV3
#define AV_CPU_FLAG_VFPV3
Definition: cpu.h:68
checkasm_check_bswapdsp
void checkasm_check_bswapdsp(void)
Definition: bswapdsp.c:60
AV_CPU_FLAG_ARMV5TE
#define AV_CPU_FLAG_ARMV5TE
Definition: cpu.h:64
AV_CPU_FLAG_MMX
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:29
suffix
const char * suffix
Definition: checkasm.c:229
checkasm_malloc
static void * checkasm_malloc(size_t size)
Definition: checkasm.c:484
AV_CPU_FLAG_RVI
#define AV_CPU_FLAG_RVI
I (full GPR bank)
Definition: cpu.h:84
checkasm_check_h264qpel
void checkasm_check_h264qpel(void)
Definition: h264qpel.c:51
random_seed.h
AV_CPU_FLAG_AESNI
#define AV_CPU_FLAG_AESNI
Advanced Encryption Standard functions.
Definition: cpu.h:46
checkasm_bench_func
int checkasm_bench_func(void)
Definition: checkasm.c:849
AV_CPU_FLAG_POWER8
#define AV_CPU_FLAG_POWER8
ISA 2.07.
Definition: cpu.h:62
cpu_flag_name
const char * cpu_flag_name
Definition: checkasm.c:320
checkasm_check_vf_sobel
void checkasm_check_vf_sobel(void)
Definition: vf_convolution.c:100
AV_CPU_FLAG_SSE
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:33
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
float_near_ulp_array
int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp, unsigned len)
Definition: checkasm.c:352
AV_CPU_FLAG_MMXEXT
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:30
checkasm_check_av_tx
void checkasm_check_av_tx(void)
Definition: av_tx.c:101
av_intfloat32::f
float f
Definition: intfloat.h:29
flag
int flag
Definition: checkasm.c:230
checkasm_check_v210enc
void checkasm_check_v210enc(void)
Definition: v210enc.c:84
checkasm_check_sbrdsp
void checkasm_check_sbrdsp(void)
Definition: sbrdsp.c:257
checkasm_check_hevc_deblock
void checkasm_check_hevc_deblock(void)
Definition: hevc_deblock.c:91
usage
static int usage(const char *path)
Definition: checkasm.c:721
AV_CPU_FLAG_VFP_VM
#define AV_CPU_FLAG_VFP_VM
VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations.
Definition: cpu.h:71
AV_CPU_FLAG_MMI
#define AV_CPU_FLAG_MMI
Definition: cpu.h:76
checkasm_check_jpeg2000dsp
void checkasm_check_jpeg2000dsp(void)
Definition: jpeg2000dsp.c:92
d
d
Definition: ffmpeg_filter.c:368
checkasm_check_hevc_add_res
void checkasm_check_hevc_add_res(void)
Definition: hevc_add_res.c:87
int32_t
int32_t
Definition: audioconvert.c:56
float_near_ulp
int float_near_ulp(float a, float b, unsigned max_ulp)
Definition: checkasm.c:334
current_func_ver
CheckasmFuncVersion * current_func_ver
Definition: checkasm.c:308
check_cpu_flag
static void check_cpu_flag(const char *name, int flag)
Definition: checkasm.c:625
bench_init_ffmpeg
static int bench_init_ffmpeg(void)
Definition: checkasm.c:684
CheckasmFunc::versions
CheckasmFuncVersion versions
Definition: checkasm.c:299
isatty
#define isatty(fd)
Definition: checkasm.c:61
AV_CPU_FLAG_RVV_I64
#define AV_CPU_FLAG_RVV_I64
Vectors of 64-bit int's *‍/.
Definition: cpu.h:89
CheckasmFunc::name
char name[1]
Definition: checkasm.c:301
checkasm_check_exrdsp
void checkasm_check_exrdsp(void)
Definition: exrdsp.c:77
balance_tree
static void balance_tree(CheckasmFunc **root)
Definition: checkasm.c:584
AV_CPU_FLAG_ARMV6T2
#define AV_CPU_FLAG_ARMV6T2
Definition: cpu.h:66
funcs
CheckasmFunc * funcs
Definition: checkasm.c:306
checkasm_check_opusdsp
void checkasm_check_opusdsp(void)
Definition: opusdsp.c:85