FFmpeg
checkasm.h
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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 #ifndef TESTS_CHECKASM_CHECKASM_H
24 #define TESTS_CHECKASM_CHECKASM_H
25 
26 #include <stdint.h>
27 #include "config.h"
28 
29 #if CONFIG_LINUX_PERF
30 #include <unistd.h> // read(3)
31 #include <sys/ioctl.h>
32 #include <asm/unistd.h>
33 #include <linux/perf_event.h>
34 #elif CONFIG_MACOS_KPERF
35 #include "libavutil/macos_kperf.h"
36 #endif
37 
38 #include "libavutil/avstring.h"
39 #include "libavutil/cpu.h"
40 #include "libavutil/emms.h"
41 #include "libavutil/internal.h"
42 #include "libavutil/lfg.h"
43 #include "libavutil/timer.h"
44 
45 #ifdef _WIN32
46 #include <windows.h>
47 #if defined(__i386__) || defined(_M_IX86)
48 #include <setjmp.h>
49 typedef jmp_buf checkasm_context;
50 #define checkasm_save_context() checkasm_handle_signal(setjmp(checkasm_context_buf))
51 #define checkasm_load_context(s) longjmp(checkasm_context_buf, s)
52 #elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
53 /* setjmp/longjmp on Windows on architectures using SEH (all except x86_32)
54  * will try to use SEH to unwind the stack, which doesn't work for assembly
55  * functions without unwind information. */
56 typedef struct { CONTEXT c; int status; } checkasm_context;
57 #define checkasm_save_context() \
58  (checkasm_context_buf.status = 0, \
59  RtlCaptureContext(&checkasm_context_buf.c), \
60  checkasm_handle_signal(checkasm_context_buf.status))
61 #define checkasm_load_context(s) \
62  (checkasm_context_buf.status = s, \
63  RtlRestoreContext(&checkasm_context_buf.c, NULL))
64 #else
65 #define checkasm_context void*
66 #define checkasm_save_context() 0
67 #define checkasm_load_context() do {} while (0)
68 #endif
69 #elif defined(_WASI_EMULATED_SIGNAL)
70 #define checkasm_context void*
71 #define checkasm_save_context() 0
72 #define checkasm_load_context() do {} while (0)
73 #else
74 #include <setjmp.h>
75 typedef sigjmp_buf checkasm_context;
76 #define checkasm_save_context() checkasm_handle_signal(sigsetjmp(checkasm_context_buf, 1))
77 #define checkasm_load_context(s) siglongjmp(checkasm_context_buf, s)
78 #endif
79 
80 void checkasm_check_aacencdsp(void);
81 void checkasm_check_aacpsdsp(void);
82 void checkasm_check_ac3dsp(void);
83 void checkasm_check_aes(void);
84 void checkasm_check_afir(void);
85 void checkasm_check_alacdsp(void);
86 void checkasm_check_apv_dsp(void);
87 void checkasm_check_audiodsp(void);
88 void checkasm_check_av_tx(void);
89 void checkasm_check_blackdetect(void);
90 void checkasm_check_blend(void);
91 void checkasm_check_blockdsp(void);
92 void checkasm_check_bswapdsp(void);
93 void checkasm_check_cavsdsp(void);
94 void checkasm_check_colordetect(void);
95 void checkasm_check_colorspace(void);
96 void checkasm_check_crc(void);
97 void checkasm_check_dcadsp(void);
98 void checkasm_check_diracdsp(void);
99 void checkasm_check_exrdsp(void);
100 void checkasm_check_fdctdsp(void);
101 void checkasm_check_fixed_dsp(void);
102 void checkasm_check_flacdsp(void);
103 void checkasm_check_float_dsp(void);
104 void checkasm_check_fmtconvert(void);
105 void checkasm_check_g722dsp(void);
106 void checkasm_check_h263dsp(void);
107 void checkasm_check_h264chroma(void);
108 void checkasm_check_h264dsp(void);
109 void checkasm_check_h264pred(void);
110 void checkasm_check_h264qpel(void);
111 void checkasm_check_hevc_add_res(void);
112 void checkasm_check_hevc_deblock(void);
113 void checkasm_check_hevc_dequant(void);
114 void checkasm_check_hevc_idct(void);
115 void checkasm_check_hevc_pel(void);
116 void checkasm_check_hevc_sao(void);
117 void checkasm_check_hpeldsp(void);
118 void checkasm_check_huffyuvdsp(void);
119 void checkasm_check_huffyuvencdsp(void);
120 void checkasm_check_idctdsp(void);
121 void checkasm_check_idet(void);
122 void checkasm_check_jpeg2000dsp(void);
123 void checkasm_check_llauddsp(void);
124 void checkasm_check_lls(void);
125 void checkasm_check_llviddsp(void);
126 void checkasm_check_llvidencdsp(void);
127 void checkasm_check_lpc(void);
128 void checkasm_check_motion(void);
129 void checkasm_check_mpeg4videodsp(void);
130 void checkasm_check_mpegvideo_unquantize(void);
131 void checkasm_check_mpegvideoencdsp(void);
132 void checkasm_check_nlmeans(void);
133 void checkasm_check_opusdsp(void);
134 void checkasm_check_pixblockdsp(void);
135 void checkasm_check_pixelutils(void);
136 void checkasm_check_png(void);
137 void checkasm_check_qpeldsp(void);
138 void checkasm_check_sbrdsp(void);
139 void checkasm_check_rv34dsp(void);
140 void checkasm_check_rv40dsp(void);
141 void checkasm_check_scene_sad(void);
142 void checkasm_check_svq1enc(void);
143 void checkasm_check_synth_filter(void);
144 void checkasm_check_sw_gbrp(void);
145 void checkasm_check_sw_range_convert(void);
146 void checkasm_check_sw_rgb(void);
147 void checkasm_check_sw_scale(void);
148 void checkasm_check_sw_xyz2rgb(void);
149 void checkasm_check_sw_yuv2rgb(void);
150 void checkasm_check_sw_yuv2yuv(void);
151 void checkasm_check_sw_ops(void);
152 void checkasm_check_takdsp(void);
153 void checkasm_check_utvideodsp(void);
154 void checkasm_check_v210dec(void);
155 void checkasm_check_v210enc(void);
156 void checkasm_check_vc1dsp(void);
157 void checkasm_check_vf_bwdif(void);
158 void checkasm_check_vf_eq(void);
159 void checkasm_check_vf_fspp(void);
160 void checkasm_check_vf_gblur(void);
161 void checkasm_check_vf_hflip(void);
162 void checkasm_check_vf_threshold(void);
163 void checkasm_check_vf_sobel(void);
164 void checkasm_check_vp3dsp(void);
165 void checkasm_check_vp6dsp(void);
166 void checkasm_check_vp8dsp(void);
167 void checkasm_check_vp9dsp(void);
168 void checkasm_check_vp9_ipred(void);
169 void checkasm_check_vp9_itxfm(void);
170 void checkasm_check_vp9_loopfilter(void);
171 void checkasm_check_vp9_mc(void);
172 void checkasm_check_videodsp(void);
173 void checkasm_check_vorbisdsp(void);
174 void checkasm_check_vvc_alf(void);
175 void checkasm_check_vvc_mc(void);
176 void checkasm_check_vvc_sao(void);
177 
178 struct CheckasmPerf;
179 
180 void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
181 int checkasm_bench_func(void);
182 int checkasm_fail_func(const char *msg, ...) av_printf_format(1, 2);
183 struct CheckasmPerf *checkasm_get_perf_context(void);
184 void checkasm_report(const char *name, ...) av_printf_format(1, 2);
185 void checkasm_set_signal_handler_state(int enabled);
186 int checkasm_handle_signal(int s);
187 extern checkasm_context checkasm_context_buf;
188 
189 /* float compare utilities */
190 int float_near_ulp(float a, float b, unsigned max_ulp);
191 int float_near_abs_eps(float a, float b, float eps);
192 int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
193 int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
194  unsigned len);
195 int float_near_abs_eps_array(const float *a, const float *b, float eps,
196  unsigned len);
197 int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
198  unsigned max_ulp, unsigned len);
199 int double_near_abs_eps(double a, double b, double eps);
200 int double_near_abs_eps_array(const double *a, const double *b, double eps,
201  unsigned len);
202 
203 extern AVLFG checkasm_lfg;
204 #define rnd() av_lfg_get(&checkasm_lfg)
205 
206 av_unused static void *func_ref, *func_new;
207 
208 extern uint64_t bench_runs;
209 
210 /* Decide whether or not the specified function needs to be tested */
211 #define check_func(func, ...) (checkasm_save_context(), func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
212 #define check_key(key, ...) (checkasm_save_context(), checkasm_check_func(key, __VA_ARGS__))
213 
214 /* Declare the function prototype. The first argument is the return value, the remaining
215  * arguments are the function parameters. Naming parameters is optional. */
216 #define declare_func(ret, ...) declare_new(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
217 #define declare_func_float(ret, ...) declare_new_float(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
218 #define declare_func_emms(cpu_flags, ret, ...) declare_new_emms(cpu_flags, ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
219 
220 /* Indicate that the current test has failed */
221 #define fail() checkasm_fail_func("%s:%d", av_basename(__FILE__), __LINE__)
222 
223 /* Print the test outcome */
224 #define report checkasm_report
225 
226 /* Call the reference function */
227 #define call_ref(...)\
228  checkasm_call((func_type *)func_ref, __VA_ARGS__)
229 
230 #define checkasm_call(func, ...) \
231  (checkasm_set_signal_handler_state(1),\
232  (func)(__VA_ARGS__));\
233  checkasm_set_signal_handler_state(0)
234 
235 #define call_new(...) checkasm_call_checked(((func_type *)func_new), __VA_ARGS__)
236 
237 #if ARCH_X86 && HAVE_X86ASM
238 /* Verifies that clobbered callee-saved registers are properly saved and restored
239  * and that either no MMX registers are touched or emms is issued */
240 void checkasm_checked_call(void *func, ...);
241 /* Verifies that clobbered callee-saved registers are properly saved and restored
242  * and issues emms for asm functions which are not required to do so */
243 void checkasm_checked_call_emms(void *func, ...);
244 /* Verifies that clobbered callee-saved registers are properly saved and restored
245  * but doesn't issue emms. Meant for dsp functions returning float or double */
246 void checkasm_checked_call_float(void *func, ...);
247 
248 #if ARCH_X86_64
249 /* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
250  * This is done by clobbering the stack with junk around the stack pointer and calling the
251  * assembly function through checked_call() with added dummy arguments which forces all
252  * real arguments to be passed on the stack and not in registers. For 32-bit arguments the
253  * upper half of the 64-bit register locations on the stack will now contain junk which will
254  * cause misbehaving functions to either produce incorrect output or segfault. Note that
255  * even though this works extremely well in practice, it's technically not guaranteed
256  * and false negatives is theoretically possible, but there can never be any false positives.
257  */
258 void checkasm_stack_clobber(uint64_t clobber, ...);
259 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
260  = (void *)checkasm_checked_call;
261 #define declare_new_float(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
262  = (void *)checkasm_checked_call_float;
263 #define declare_new_emms(cpu_flags, ret, ...) \
264  ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) = \
265  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
266  (void *)checkasm_checked_call;
267 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
268 #define checkasm_call_checked(func, ...) \
269  (checkasm_set_signal_handler_state(1),\
270  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
271  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
272  checked_call((func), 0, 0, 0, 0, 0, __VA_ARGS__));\
273  checkasm_set_signal_handler_state(0)
274 #elif ARCH_X86_32
275 #define declare_new(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
276 #define declare_new_float(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call_float;
277 #define declare_new_emms(cpu_flags, ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = \
278  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
279  (void *)checkasm_checked_call;
280 #define checkasm_call_checked(func, ...)\
281  (checkasm_set_signal_handler_state(1),\
282  checked_call((func), __VA_ARGS__));\
283  checkasm_set_signal_handler_state(0)
284 #endif
285 #elif ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
286 /* Use a dummy argument, to offset the real parameters by 2, not only 1.
287  * This makes sure that potential 8-byte-alignment of parameters is kept the same
288  * even when the extra parameters have been removed. */
289 void checkasm_checked_call_vfp(void *func, int dummy, ...);
290 void checkasm_checked_call_novfp(void *func, int dummy, ...);
291 extern void (*checkasm_checked_call)(void *func, int dummy, ...);
292 #define declare_new(ret, ...) ret (*checked_call)(void *, int dummy, __VA_ARGS__, \
293  int, int, int, int, int, int, int, int, \
294  int, int, int, int, int, int, int) = (void *)checkasm_checked_call;
295 #define checkasm_call_checked(func, ...) \
296  (checkasm_set_signal_handler_state(1),\
297  checked_call((func), 0, __VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0));\
298  checkasm_set_signal_handler_state(0)
299 #elif ARCH_AARCH64 && !defined(__APPLE__)
300 void checkasm_stack_clobber(uint64_t clobber, ...);
301 void checkasm_checked_call(void *func, ...);
302 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, int, int, __VA_ARGS__,\
303  int, int, int, int, int, int, int, int,\
304  int, int, int, int, int, int, int)\
305  = (void *)checkasm_checked_call;
306 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
307 #define checkasm_call_checked(func, ...) (checkasm_set_signal_handler_state(1),\
308  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
309  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
310  checked_call((func), 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__,\
311  7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0));\
312  checkasm_set_signal_handler_state(0)
313 #elif ARCH_RISCV
314 void checkasm_set_function(void *);
315 void *checkasm_get_wrapper(void);
316 
317 #if HAVE_RV
318 #define declare_new(ret, ...) \
319  ret (*checked_call)(__VA_ARGS__) = checkasm_get_wrapper();
320 #define checkasm_call_checked(func, ...) \
321  (checkasm_set_signal_handler_state(1),\
322  checkasm_set_function(func), checked_call(__VA_ARGS__));\
323  checkasm_set_signal_handler_state(0)
324 #else
325 #define declare_new(ret, ...)
326 #define checkasm_call_checked(func, ...)\
327  (checkasm_set_signal_handler_state(1),\
328  (func)(__VA_ARGS__));\
329  checkasm_set_signal_handler_state(0)
330 #endif
331 #else
332 #define declare_new(ret, ...)
333 #define declare_new_float(ret, ...)
334 #define declare_new_emms(cpu_flags, ret, ...)
335 /* Call the function */
336 #define checkasm_call_checked(func, ...)\
337  (checkasm_set_signal_handler_state(1),\
338  (func)(__VA_ARGS__));\
339  checkasm_set_signal_handler_state(0)
340 #endif
341 
342 #ifndef declare_new_emms
343 #define declare_new_emms(cpu_flags, ret, ...) declare_new(ret, __VA_ARGS__)
344 #endif
345 #ifndef declare_new_float
346 #define declare_new_float(ret, ...) declare_new(ret, __VA_ARGS__)
347 #endif
348 
349 typedef struct CheckasmPerf {
350  int sysfd;
351  uint64_t cycles;
352  int iterations;
353 } CheckasmPerf;
354 
355 #if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
356 
357 #if CONFIG_LINUX_PERF
358 #define PERF_START(t) do { \
359  ioctl(sysfd, PERF_EVENT_IOC_RESET, 0); \
360  ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0); \
361 } while (0)
362 #define PERF_STOP(t) do { \
363  int ret; \
364  ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
365  ret = read(sysfd, &t, sizeof(t)); \
366  (void)ret; \
367 } while (0)
368 #elif CONFIG_MACOS_KPERF
369 #define PERF_START(t) t = ff_kperf_cycles()
370 #define PERF_STOP(t) t = ff_kperf_cycles() - t
371 #else
372 #define PERF_START(t) t = AV_READ_TIME()
373 #define PERF_STOP(t) t = AV_READ_TIME() - t
374 #endif
375 
376 #define CALL4(...)\
377  do {\
378  tfunc(__VA_ARGS__); \
379  tfunc(__VA_ARGS__); \
380  tfunc(__VA_ARGS__); \
381  tfunc(__VA_ARGS__); \
382  } while (0)
383 
384 #define CALL16(...)\
385  do {\
386  CALL4(__VA_ARGS__); \
387  CALL4(__VA_ARGS__); \
388  CALL4(__VA_ARGS__); \
389  CALL4(__VA_ARGS__); \
390  } while (0)
391 
392 /* Benchmark the function */
393 #define bench(func, ...)\
394  do {\
395  if (checkasm_bench_func()) {\
396  struct CheckasmPerf *perf = checkasm_get_perf_context();\
397  av_unused const int sysfd = perf->sysfd;\
398  func_type *tfunc = func;\
399  uint64_t tsum = 0;\
400  uint64_t ti, tcount = 0;\
401  uint64_t t = 0; \
402  const uint64_t truns = FFMAX(bench_runs >> 3, 1);\
403  checkasm_set_signal_handler_state(1);\
404  for (ti = 0; ti < truns; ti++) {\
405  PERF_START(t);\
406  CALL16(__VA_ARGS__);\
407  CALL16(__VA_ARGS__);\
408  PERF_STOP(t);\
409  if (t*tcount <= tsum*4 && ti > 0) {\
410  tsum += t;\
411  tcount++;\
412  }\
413  }\
414  emms_c();\
415  perf->cycles += tsum;\
416  perf->iterations += tcount;\
417  checkasm_set_signal_handler_state(0);\
418  }\
419  } while (0)
420 #else
421 #define bench(func, ...) while(0)
422 #define PERF_START(t) while(0)
423 #define PERF_STOP(t) while(0)
424 #endif
425 
426 #define bench_new(...) bench(func_new, __VA_ARGS__)
427 
428 #define BUF_RECT(type, name, w, h) \
429  LOCAL_ALIGNED_32(type, name##_buf, [((h)+32)*(FFALIGN(w,64)+64) + 64]); \
430  av_unused ptrdiff_t name##_stride = sizeof(type)*(FFALIGN(w,64)+64); \
431  av_unused int name##_buf_h = (h)+32; \
432  type *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
433 
434 #define PIXEL_RECT(name, w, h) \
435  LOCAL_ALIGNED_32(uint8_t, name##_buf, [sizeof(uint16_t) * (((h)+32)*(FFALIGN(w,64)+64) + 64)],); \
436  av_unused ptrdiff_t name##_stride = sizeof(uint16_t) * (FFALIGN(w,64)+64); \
437  av_unused int name##_buf_h = (h)+32; \
438  uint8_t *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
439 
440 #define CLEAR_BUF_RECT(name) \
441  memset(name##_buf, 0x99, name##_stride * name##_buf_h + 64)
442 #define CLEAR_PIXEL_RECT(name) \
443  CLEAR_BUF_RECT(name)
444 
445 #define DECL_CHECKASM_CHECK_FUNC(type) \
446 int checkasm_check_##type(const char *file, int line, \
447  const type *buf1, ptrdiff_t stride1, \
448  const type *buf2, ptrdiff_t stride2, \
449  int w, int h, const char *name, \
450  int align_w, int align_h, \
451  int padding)
452 
453 DECL_CHECKASM_CHECK_FUNC(uint8_t);
454 DECL_CHECKASM_CHECK_FUNC(uint16_t);
455 DECL_CHECKASM_CHECK_FUNC(uint32_t);
456 DECL_CHECKASM_CHECK_FUNC(int16_t);
457 DECL_CHECKASM_CHECK_FUNC(int32_t);
458 
459 int checkasm_check_float_ulp(const char *file, int line,
460  const float *buf1, ptrdiff_t stride1,
461  const float *buf2, ptrdiff_t stride2,
462  int w, int h, const char *name,
463  unsigned max_ulp, int align_w, int align_h,
464  int padding);
465 
466 #define PASTE(a,b) a ## b
467 #define CONCAT(a,b) PASTE(a,b)
468 
469 #define checkasm_check2(prefix, ...) CONCAT(checkasm_check_, prefix)(__FILE__, __LINE__, __VA_ARGS__)
470 #define checkasm_check(prefix, ...) checkasm_check2(prefix, __VA_ARGS__, 0, 0, 0)
471 /* Check a pointer from BUF_RECT, checking whether there have been
472  * writes outside of the designated area. */
473 #define checkasm_check_padded(...) \
474  checkasm_check2(__VA_ARGS__, 1, 1, 8)
475 /* Check a pointer from BUF_RECT, checking whether there have been
476  * writes outside of the designated area. Allow writing slightly past the
477  * end of the buffer, by aligning w/h to align_w/align_h, and checking
478  * for overwrites outside of that. */
479 #define checkasm_check_padded_align(...) \
480  checkasm_check2(__VA_ARGS__, 8)
481 
482 /* This assumes that there is a local variable named "bit_depth".
483  * For tests that don't have that and only operate on a single
484  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
485 #define checkasm_check_pixel2(buf1, stride1, buf2, stride2, ...) \
486  ((bit_depth > 8) ? \
487  checkasm_check2(uint16_t, (const uint16_t*)buf1, stride1, \
488  (const uint16_t*)buf2, stride2, \
489  __VA_ARGS__) : \
490  checkasm_check2(uint8_t, (const uint8_t*) buf1, stride1, \
491  (const uint8_t*) buf2, stride2, \
492  __VA_ARGS__))
493 #define checkasm_check_pixel(...) \
494  checkasm_check_pixel2(__VA_ARGS__, 0, 0, 0)
495 #define checkasm_check_pixel_padded(...) \
496  checkasm_check_pixel2(__VA_ARGS__, 1, 1, 8)
497 #define checkasm_check_pixel_padded_align(...) \
498  checkasm_check_pixel2(__VA_ARGS__, 8)
499 
500 /* This assumes that there is a local variable named "bit_depth"
501  * and that the type-specific buffers obey the name ## _BITDEPTH
502  * convention.
503  * For tests that don't have that and only operate on a single
504  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
505 #define checkasm_check_dctcoef(buf1, stride1, buf2, stride2, ...) \
506  ((bit_depth > 8) ? \
507  checkasm_check(int32_t, buf1 ## _32, stride1, \
508  buf2 ## _32, stride2, \
509  __VA_ARGS__) : \
510  checkasm_check(int16_t, buf1 ## _16, stride1, \
511  buf2 ## _16, stride2, \
512  __VA_ARGS__))
513 
514 #endif /* TESTS_CHECKASM_CHECKASM_H */
checkasm_check_nlmeans
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Definition: vf_nlmeans.c:34
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name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
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void checkasm_check_videodsp(void)
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checkasm_check_vf_eq
void checkasm_check_vf_eq(void)
Definition: vf_eq.c:76
checkasm_check_dcadsp
void checkasm_check_dcadsp(void)
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void checkasm_check_v210dec(void)
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checkasm_check_sw_yuv2yuv
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Definition: aacencdsp.c:100
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b
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checkasm_check_vvc_sao
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CheckasmPerf::sysfd
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checkasm_check_alacdsp
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double_near_abs_eps
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checkasm_check_ac3dsp
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checkasm_check_h263dsp
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float_near_abs_eps_ulp
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CheckasmPerf
Definition: checkasm.h:349
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checkasm_check_vvc_mc
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checkasm_check_sw_yuv2rgb
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double_near_abs_eps_array
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checkasm_check_pixblockdsp
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checkasm_check_bswapdsp
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s
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void checkasm_check_vf_bwdif(void)
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checkasm_check_sw_rgb
void checkasm_check_sw_rgb(void)
Definition: sw_rgb.c:804
checkasm_check_hevc_sao
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Definition: hevc_sao.c:136
checkasm_check_hevc_pel
void checkasm_check_hevc_pel(void)
Definition: hevc_pel.c:621
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int checkasm_fail_func(const char *msg,...) av_printf_format(1
CheckasmPerf::iterations
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checkasm_check_mpeg4videodsp
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c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
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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
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