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_mpegvideo_unquantize(void);
130 void checkasm_check_mpegvideoencdsp(void);
131 void checkasm_check_nlmeans(void);
132 void checkasm_check_opusdsp(void);
133 void checkasm_check_pixblockdsp(void);
134 void checkasm_check_pixelutils(void);
135 void checkasm_check_png(void);
136 void checkasm_check_qpeldsp(void);
137 void checkasm_check_sbrdsp(void);
138 void checkasm_check_rv34dsp(void);
139 void checkasm_check_rv40dsp(void);
140 void checkasm_check_scene_sad(void);
141 void checkasm_check_svq1enc(void);
142 void checkasm_check_synth_filter(void);
143 void checkasm_check_sw_gbrp(void);
144 void checkasm_check_sw_range_convert(void);
145 void checkasm_check_sw_rgb(void);
146 void checkasm_check_sw_scale(void);
147 void checkasm_check_sw_xyz2rgb(void);
148 void checkasm_check_sw_yuv2rgb(void);
149 void checkasm_check_sw_yuv2yuv(void);
150 void checkasm_check_sw_ops(void);
151 void checkasm_check_takdsp(void);
152 void checkasm_check_utvideodsp(void);
153 void checkasm_check_v210dec(void);
154 void checkasm_check_v210enc(void);
155 void checkasm_check_vc1dsp(void);
156 void checkasm_check_vf_bwdif(void);
157 void checkasm_check_vf_eq(void);
158 void checkasm_check_vf_fspp(void);
159 void checkasm_check_vf_gblur(void);
160 void checkasm_check_vf_hflip(void);
161 void checkasm_check_vf_threshold(void);
162 void checkasm_check_vf_sobel(void);
163 void checkasm_check_vp3dsp(void);
164 void checkasm_check_vp6dsp(void);
165 void checkasm_check_vp8dsp(void);
166 void checkasm_check_vp9dsp(void);
167 void checkasm_check_vp9_ipred(void);
168 void checkasm_check_vp9_itxfm(void);
169 void checkasm_check_vp9_loopfilter(void);
170 void checkasm_check_vp9_mc(void);
171 void checkasm_check_videodsp(void);
172 void checkasm_check_vorbisdsp(void);
173 void checkasm_check_vvc_alf(void);
174 void checkasm_check_vvc_mc(void);
175 void checkasm_check_vvc_sao(void);
176 
177 struct CheckasmPerf;
178 
179 void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
180 int checkasm_bench_func(void);
181 int checkasm_fail_func(const char *msg, ...) av_printf_format(1, 2);
182 struct CheckasmPerf *checkasm_get_perf_context(void);
183 void checkasm_report(const char *name, ...) av_printf_format(1, 2);
184 void checkasm_set_signal_handler_state(int enabled);
185 int checkasm_handle_signal(int s);
186 extern checkasm_context checkasm_context_buf;
187 
188 /* float compare utilities */
189 int float_near_ulp(float a, float b, unsigned max_ulp);
190 int float_near_abs_eps(float a, float b, float eps);
191 int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
192 int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
193  unsigned len);
194 int float_near_abs_eps_array(const float *a, const float *b, float eps,
195  unsigned len);
196 int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
197  unsigned max_ulp, unsigned len);
198 int double_near_abs_eps(double a, double b, double eps);
199 int double_near_abs_eps_array(const double *a, const double *b, double eps,
200  unsigned len);
201 
202 extern AVLFG checkasm_lfg;
203 #define rnd() av_lfg_get(&checkasm_lfg)
204 
205 av_unused static void *func_ref, *func_new;
206 
207 extern uint64_t bench_runs;
208 
209 /* Decide whether or not the specified function needs to be tested */
210 #define check_func(func, ...) (checkasm_save_context(), func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
211 #define check_key(key, ...) (checkasm_save_context(), checkasm_check_func(key, __VA_ARGS__))
212 
213 /* Declare the function prototype. The first argument is the return value, the remaining
214  * arguments are the function parameters. Naming parameters is optional. */
215 #define declare_func(ret, ...) declare_new(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
216 #define declare_func_float(ret, ...) declare_new_float(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
217 #define declare_func_emms(cpu_flags, ret, ...) declare_new_emms(cpu_flags, ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
218 
219 /* Indicate that the current test has failed */
220 #define fail() checkasm_fail_func("%s:%d", av_basename(__FILE__), __LINE__)
221 
222 /* Print the test outcome */
223 #define report checkasm_report
224 
225 /* Call the reference function */
226 #define call_ref(...)\
227  checkasm_call((func_type *)func_ref, __VA_ARGS__)
228 
229 #define checkasm_call(func, ...) \
230  (checkasm_set_signal_handler_state(1),\
231  (func)(__VA_ARGS__));\
232  checkasm_set_signal_handler_state(0)
233 
234 #define call_new(...) checkasm_call_checked(((func_type *)func_new), __VA_ARGS__)
235 
236 #if ARCH_X86 && HAVE_X86ASM
237 /* Verifies that clobbered callee-saved registers are properly saved and restored
238  * and that either no MMX registers are touched or emms is issued */
239 void checkasm_checked_call(void *func, ...);
240 /* Verifies that clobbered callee-saved registers are properly saved and restored
241  * and issues emms for asm functions which are not required to do so */
242 void checkasm_checked_call_emms(void *func, ...);
243 /* Verifies that clobbered callee-saved registers are properly saved and restored
244  * but doesn't issue emms. Meant for dsp functions returning float or double */
245 void checkasm_checked_call_float(void *func, ...);
246 
247 #if ARCH_X86_64
248 /* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
249  * This is done by clobbering the stack with junk around the stack pointer and calling the
250  * assembly function through checked_call() with added dummy arguments which forces all
251  * real arguments to be passed on the stack and not in registers. For 32-bit arguments the
252  * upper half of the 64-bit register locations on the stack will now contain junk which will
253  * cause misbehaving functions to either produce incorrect output or segfault. Note that
254  * even though this works extremely well in practice, it's technically not guaranteed
255  * and false negatives is theoretically possible, but there can never be any false positives.
256  */
257 void checkasm_stack_clobber(uint64_t clobber, ...);
258 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
259  = (void *)checkasm_checked_call;
260 #define declare_new_float(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
261  = (void *)checkasm_checked_call_float;
262 #define declare_new_emms(cpu_flags, ret, ...) \
263  ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) = \
264  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
265  (void *)checkasm_checked_call;
266 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
267 #define checkasm_call_checked(func, ...) \
268  (checkasm_set_signal_handler_state(1),\
269  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
270  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
271  checked_call((func), 0, 0, 0, 0, 0, __VA_ARGS__));\
272  checkasm_set_signal_handler_state(0)
273 #elif ARCH_X86_32
274 #define declare_new(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
275 #define declare_new_float(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call_float;
276 #define declare_new_emms(cpu_flags, ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = \
277  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
278  (void *)checkasm_checked_call;
279 #define checkasm_call_checked(func, ...)\
280  (checkasm_set_signal_handler_state(1),\
281  checked_call((func), __VA_ARGS__));\
282  checkasm_set_signal_handler_state(0)
283 #endif
284 #elif ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
285 /* Use a dummy argument, to offset the real parameters by 2, not only 1.
286  * This makes sure that potential 8-byte-alignment of parameters is kept the same
287  * even when the extra parameters have been removed. */
288 void checkasm_checked_call_vfp(void *func, int dummy, ...);
289 void checkasm_checked_call_novfp(void *func, int dummy, ...);
290 extern void (*checkasm_checked_call)(void *func, int dummy, ...);
291 #define declare_new(ret, ...) ret (*checked_call)(void *, int dummy, __VA_ARGS__, \
292  int, int, int, int, int, int, int, int, \
293  int, int, int, int, int, int, int) = (void *)checkasm_checked_call;
294 #define checkasm_call_checked(func, ...) \
295  (checkasm_set_signal_handler_state(1),\
296  checked_call((func), 0, __VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0));\
297  checkasm_set_signal_handler_state(0)
298 #elif ARCH_AARCH64 && !defined(__APPLE__)
299 void checkasm_stack_clobber(uint64_t clobber, ...);
300 void checkasm_checked_call(void *func, ...);
301 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, int, int, __VA_ARGS__,\
302  int, int, int, int, int, int, int, int,\
303  int, int, int, int, int, int, int)\
304  = (void *)checkasm_checked_call;
305 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
306 #define checkasm_call_checked(func, ...) (checkasm_set_signal_handler_state(1),\
307  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
308  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
309  checked_call((func), 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__,\
310  7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0));\
311  checkasm_set_signal_handler_state(0)
312 #elif ARCH_RISCV
313 void checkasm_set_function(void *);
314 void *checkasm_get_wrapper(void);
315 
316 #if HAVE_RV
317 #define declare_new(ret, ...) \
318  ret (*checked_call)(__VA_ARGS__) = checkasm_get_wrapper();
319 #define checkasm_call_checked(func, ...) \
320  (checkasm_set_signal_handler_state(1),\
321  checkasm_set_function(func), checked_call(__VA_ARGS__));\
322  checkasm_set_signal_handler_state(0)
323 #else
324 #define declare_new(ret, ...)
325 #define checkasm_call_checked(func, ...)\
326  (checkasm_set_signal_handler_state(1),\
327  (func)(__VA_ARGS__));\
328  checkasm_set_signal_handler_state(0)
329 #endif
330 #else
331 #define declare_new(ret, ...)
332 #define declare_new_float(ret, ...)
333 #define declare_new_emms(cpu_flags, ret, ...)
334 /* Call the function */
335 #define checkasm_call_checked(func, ...)\
336  (checkasm_set_signal_handler_state(1),\
337  (func)(__VA_ARGS__));\
338  checkasm_set_signal_handler_state(0)
339 #endif
340 
341 #ifndef declare_new_emms
342 #define declare_new_emms(cpu_flags, ret, ...) declare_new(ret, __VA_ARGS__)
343 #endif
344 #ifndef declare_new_float
345 #define declare_new_float(ret, ...) declare_new(ret, __VA_ARGS__)
346 #endif
347 
348 typedef struct CheckasmPerf {
349  int sysfd;
350  uint64_t cycles;
351  int iterations;
352 } CheckasmPerf;
353 
354 #if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
355 
356 #if CONFIG_LINUX_PERF
357 #define PERF_START(t) do { \
358  ioctl(sysfd, PERF_EVENT_IOC_RESET, 0); \
359  ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0); \
360 } while (0)
361 #define PERF_STOP(t) do { \
362  int ret; \
363  ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
364  ret = read(sysfd, &t, sizeof(t)); \
365  (void)ret; \
366 } while (0)
367 #elif CONFIG_MACOS_KPERF
368 #define PERF_START(t) t = ff_kperf_cycles()
369 #define PERF_STOP(t) t = ff_kperf_cycles() - t
370 #else
371 #define PERF_START(t) t = AV_READ_TIME()
372 #define PERF_STOP(t) t = AV_READ_TIME() - t
373 #endif
374 
375 #define CALL4(...)\
376  do {\
377  tfunc(__VA_ARGS__); \
378  tfunc(__VA_ARGS__); \
379  tfunc(__VA_ARGS__); \
380  tfunc(__VA_ARGS__); \
381  } while (0)
382 
383 #define CALL16(...)\
384  do {\
385  CALL4(__VA_ARGS__); \
386  CALL4(__VA_ARGS__); \
387  CALL4(__VA_ARGS__); \
388  CALL4(__VA_ARGS__); \
389  } while (0)
390 
391 /* Benchmark the function */
392 #define bench(func, ...)\
393  do {\
394  if (checkasm_bench_func()) {\
395  struct CheckasmPerf *perf = checkasm_get_perf_context();\
396  av_unused const int sysfd = perf->sysfd;\
397  func_type *tfunc = func;\
398  uint64_t tsum = 0;\
399  uint64_t ti, tcount = 0;\
400  uint64_t t = 0; \
401  const uint64_t truns = FFMAX(bench_runs >> 3, 1);\
402  checkasm_set_signal_handler_state(1);\
403  for (ti = 0; ti < truns; ti++) {\
404  PERF_START(t);\
405  CALL16(__VA_ARGS__);\
406  CALL16(__VA_ARGS__);\
407  PERF_STOP(t);\
408  if (t*tcount <= tsum*4 && ti > 0) {\
409  tsum += t;\
410  tcount++;\
411  }\
412  }\
413  emms_c();\
414  perf->cycles += tsum;\
415  perf->iterations += tcount;\
416  checkasm_set_signal_handler_state(0);\
417  }\
418  } while (0)
419 #else
420 #define bench(func, ...) while(0)
421 #define PERF_START(t) while(0)
422 #define PERF_STOP(t) while(0)
423 #endif
424 
425 #define bench_new(...) bench(func_new, __VA_ARGS__)
426 
427 #define BUF_RECT(type, name, w, h) \
428  LOCAL_ALIGNED_32(type, name##_buf, [((h)+32)*(FFALIGN(w,64)+64) + 64]); \
429  av_unused ptrdiff_t name##_stride = sizeof(type)*(FFALIGN(w,64)+64); \
430  av_unused int name##_buf_h = (h)+32; \
431  type *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
432 
433 #define PIXEL_RECT(name, w, h) \
434  LOCAL_ALIGNED_32(uint8_t, name##_buf, [sizeof(uint16_t) * (((h)+32)*(FFALIGN(w,64)+64) + 64)],); \
435  av_unused ptrdiff_t name##_stride = sizeof(uint16_t) * (FFALIGN(w,64)+64); \
436  av_unused int name##_buf_h = (h)+32; \
437  uint8_t *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
438 
439 #define CLEAR_BUF_RECT(name) \
440  memset(name##_buf, 0x99, name##_stride * name##_buf_h + 64)
441 #define CLEAR_PIXEL_RECT(name) \
442  CLEAR_BUF_RECT(name)
443 
444 #define DECL_CHECKASM_CHECK_FUNC(type) \
445 int checkasm_check_##type(const char *file, int line, \
446  const type *buf1, ptrdiff_t stride1, \
447  const type *buf2, ptrdiff_t stride2, \
448  int w, int h, const char *name, \
449  int align_w, int align_h, \
450  int padding)
451 
452 DECL_CHECKASM_CHECK_FUNC(uint8_t);
453 DECL_CHECKASM_CHECK_FUNC(uint16_t);
454 DECL_CHECKASM_CHECK_FUNC(uint32_t);
455 DECL_CHECKASM_CHECK_FUNC(int16_t);
456 DECL_CHECKASM_CHECK_FUNC(int32_t);
457 
458 int checkasm_check_float_ulp(const char *file, int line,
459  const float *buf1, ptrdiff_t stride1,
460  const float *buf2, ptrdiff_t stride2,
461  int w, int h, const char *name,
462  unsigned max_ulp, int align_w, int align_h,
463  int padding);
464 
465 #define PASTE(a,b) a ## b
466 #define CONCAT(a,b) PASTE(a,b)
467 
468 #define checkasm_check2(prefix, ...) CONCAT(checkasm_check_, prefix)(__FILE__, __LINE__, __VA_ARGS__)
469 #define checkasm_check(prefix, ...) checkasm_check2(prefix, __VA_ARGS__, 0, 0, 0)
470 /* Check a pointer from BUF_RECT, checking whether there have been
471  * writes outside of the designated area. */
472 #define checkasm_check_padded(...) \
473  checkasm_check2(__VA_ARGS__, 1, 1, 8)
474 /* Check a pointer from BUF_RECT, checking whether there have been
475  * writes outside of the designated area. Allow writing slightly past the
476  * end of the buffer, by aligning w/h to align_w/align_h, and checking
477  * for overwrites outside of that. */
478 #define checkasm_check_padded_align(...) \
479  checkasm_check2(__VA_ARGS__, 8)
480 
481 /* This assumes that there is a local variable named "bit_depth".
482  * For tests that don't have that and only operate on a single
483  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
484 #define checkasm_check_pixel2(buf1, stride1, buf2, stride2, ...) \
485  ((bit_depth > 8) ? \
486  checkasm_check2(uint16_t, (const uint16_t*)buf1, stride1, \
487  (const uint16_t*)buf2, stride2, \
488  __VA_ARGS__) : \
489  checkasm_check2(uint8_t, (const uint8_t*) buf1, stride1, \
490  (const uint8_t*) buf2, stride2, \
491  __VA_ARGS__))
492 #define checkasm_check_pixel(...) \
493  checkasm_check_pixel2(__VA_ARGS__, 0, 0, 0)
494 #define checkasm_check_pixel_padded(...) \
495  checkasm_check_pixel2(__VA_ARGS__, 1, 1, 8)
496 #define checkasm_check_pixel_padded_align(...) \
497  checkasm_check_pixel2(__VA_ARGS__, 8)
498 
499 /* This assumes that there is a local variable named "bit_depth"
500  * and that the type-specific buffers obey the name ## _BITDEPTH
501  * convention.
502  * For tests that don't have that and only operate on a single
503  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
504 #define checkasm_check_dctcoef(buf1, stride1, buf2, stride2, ...) \
505  ((bit_depth > 8) ? \
506  checkasm_check(int32_t, buf1 ## _32, stride1, \
507  buf2 ## _32, stride2, \
508  __VA_ARGS__) : \
509  checkasm_check(int16_t, buf1 ## _16, stride1, \
510  buf2 ## _16, stride2, \
511  __VA_ARGS__))
512 
513 #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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CheckasmPerf
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checkasm_check_vvc_mc
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s
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void checkasm_check_vf_bwdif(void)
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void checkasm_check_sw_rgb(void)
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checkasm_check_hevc_sao
void checkasm_check_hevc_sao(void)
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void checkasm_check_hevc_pel(void)
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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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