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_dcadsp(void);
97 void checkasm_check_diracdsp(void);
98 void checkasm_check_exrdsp(void);
99 void checkasm_check_fdctdsp(void);
100 void checkasm_check_fixed_dsp(void);
101 void checkasm_check_flacdsp(void);
102 void checkasm_check_float_dsp(void);
103 void checkasm_check_fmtconvert(void);
104 void checkasm_check_g722dsp(void);
105 void checkasm_check_h263dsp(void);
106 void checkasm_check_h264chroma(void);
107 void checkasm_check_h264dsp(void);
108 void checkasm_check_h264pred(void);
109 void checkasm_check_h264qpel(void);
110 void checkasm_check_hevc_add_res(void);
111 void checkasm_check_hevc_deblock(void);
112 void checkasm_check_hevc_idct(void);
113 void checkasm_check_hevc_pel(void);
114 void checkasm_check_hevc_sao(void);
115 void checkasm_check_hpeldsp(void);
116 void checkasm_check_huffyuvdsp(void);
117 void checkasm_check_idctdsp(void);
118 void checkasm_check_idet(void);
119 void checkasm_check_jpeg2000dsp(void);
120 void checkasm_check_llauddsp(void);
121 void checkasm_check_lls(void);
122 void checkasm_check_llviddsp(void);
123 void checkasm_check_llviddspenc(void);
124 void checkasm_check_lpc(void);
125 void checkasm_check_motion(void);
126 void checkasm_check_mpegvideo_unquantize(void);
127 void checkasm_check_mpegvideoencdsp(void);
128 void checkasm_check_nlmeans(void);
129 void checkasm_check_opusdsp(void);
130 void checkasm_check_pixblockdsp(void);
131 void checkasm_check_qpeldsp(void);
132 void checkasm_check_sbrdsp(void);
133 void checkasm_check_rv34dsp(void);
134 void checkasm_check_rv40dsp(void);
135 void checkasm_check_scene_sad(void);
136 void checkasm_check_svq1enc(void);
137 void checkasm_check_synth_filter(void);
138 void checkasm_check_sw_gbrp(void);
139 void checkasm_check_sw_range_convert(void);
140 void checkasm_check_sw_rgb(void);
141 void checkasm_check_sw_scale(void);
142 void checkasm_check_sw_xyz2rgb(void);
143 void checkasm_check_sw_yuv2rgb(void);
144 void checkasm_check_sw_yuv2yuv(void);
145 void checkasm_check_sw_ops(void);
146 void checkasm_check_takdsp(void);
147 void checkasm_check_utvideodsp(void);
148 void checkasm_check_v210dec(void);
149 void checkasm_check_v210enc(void);
150 void checkasm_check_vc1dsp(void);
151 void checkasm_check_vf_bwdif(void);
152 void checkasm_check_vf_eq(void);
153 void checkasm_check_vf_fspp(void);
154 void checkasm_check_vf_gblur(void);
155 void checkasm_check_vf_hflip(void);
156 void checkasm_check_vf_threshold(void);
157 void checkasm_check_vf_sobel(void);
158 void checkasm_check_vp3dsp(void);
159 void checkasm_check_vp6dsp(void);
160 void checkasm_check_vp8dsp(void);
161 void checkasm_check_vp9dsp(void);
162 void checkasm_check_vp9_ipred(void);
163 void checkasm_check_vp9_itxfm(void);
164 void checkasm_check_vp9_loopfilter(void);
165 void checkasm_check_vp9_mc(void);
166 void checkasm_check_videodsp(void);
167 void checkasm_check_vorbisdsp(void);
168 void checkasm_check_vvc_alf(void);
169 void checkasm_check_vvc_mc(void);
170 void checkasm_check_vvc_sao(void);
171 
172 struct CheckasmPerf;
173 
174 void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
175 int checkasm_bench_func(void);
176 int checkasm_fail_func(const char *msg, ...) av_printf_format(1, 2);
177 struct CheckasmPerf *checkasm_get_perf_context(void);
178 void checkasm_report(const char *name, ...) av_printf_format(1, 2);
179 void checkasm_set_signal_handler_state(int enabled);
180 int checkasm_handle_signal(int s);
181 extern checkasm_context checkasm_context_buf;
182 
183 /* float compare utilities */
184 int float_near_ulp(float a, float b, unsigned max_ulp);
185 int float_near_abs_eps(float a, float b, float eps);
186 int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
187 int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
188  unsigned len);
189 int float_near_abs_eps_array(const float *a, const float *b, float eps,
190  unsigned len);
191 int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
192  unsigned max_ulp, unsigned len);
193 int double_near_abs_eps(double a, double b, double eps);
194 int double_near_abs_eps_array(const double *a, const double *b, double eps,
195  unsigned len);
196 
197 extern AVLFG checkasm_lfg;
198 #define rnd() av_lfg_get(&checkasm_lfg)
199 
200 av_unused static void *func_ref, *func_new;
201 
202 extern uint64_t bench_runs;
203 
204 /* Decide whether or not the specified function needs to be tested */
205 #define check_func(func, ...) (checkasm_save_context(), func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
206 
207 /* Declare the function prototype. The first argument is the return value, the remaining
208  * arguments are the function parameters. Naming parameters is optional. */
209 #define declare_func(ret, ...) declare_new(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
210 #define declare_func_float(ret, ...) declare_new_float(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
211 #define declare_func_emms(cpu_flags, ret, ...) declare_new_emms(cpu_flags, ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
212 
213 /* Indicate that the current test has failed */
214 #define fail() checkasm_fail_func("%s:%d", av_basename(__FILE__), __LINE__)
215 
216 /* Print the test outcome */
217 #define report checkasm_report
218 
219 /* Call the reference function */
220 #define call_ref(...)\
221  (checkasm_set_signal_handler_state(1),\
222  ((func_type *)func_ref)(__VA_ARGS__));\
223  checkasm_set_signal_handler_state(0)
224 
225 #if ARCH_X86 && HAVE_X86ASM
226 /* Verifies that clobbered callee-saved registers are properly saved and restored
227  * and that either no MMX registers are touched or emms is issued */
228 void checkasm_checked_call(void *func, ...);
229 /* Verifies that clobbered callee-saved registers are properly saved and restored
230  * and issues emms for asm functions which are not required to do so */
231 void checkasm_checked_call_emms(void *func, ...);
232 /* Verifies that clobbered callee-saved registers are properly saved and restored
233  * but doesn't issue emms. Meant for dsp functions returning float or double */
234 void checkasm_checked_call_float(void *func, ...);
235 
236 #if ARCH_X86_64
237 /* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
238  * This is done by clobbering the stack with junk around the stack pointer and calling the
239  * assembly function through checked_call() with added dummy arguments which forces all
240  * real arguments to be passed on the stack and not in registers. For 32-bit arguments the
241  * upper half of the 64-bit register locations on the stack will now contain junk which will
242  * cause misbehaving functions to either produce incorrect output or segfault. Note that
243  * even though this works extremely well in practice, it's technically not guaranteed
244  * and false negatives is theoretically possible, but there can never be any false positives.
245  */
246 void checkasm_stack_clobber(uint64_t clobber, ...);
247 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
248  = (void *)checkasm_checked_call;
249 #define declare_new_float(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
250  = (void *)checkasm_checked_call_float;
251 #define declare_new_emms(cpu_flags, ret, ...) \
252  ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) = \
253  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
254  (void *)checkasm_checked_call;
255 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
256 #define call_new(...) (checkasm_set_signal_handler_state(1),\
257  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
258  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
259  checked_call(func_new, 0, 0, 0, 0, 0, __VA_ARGS__));\
260  checkasm_set_signal_handler_state(0)
261 #elif ARCH_X86_32
262 #define declare_new(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
263 #define declare_new_float(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call_float;
264 #define declare_new_emms(cpu_flags, ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = \
265  ((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
266  (void *)checkasm_checked_call;
267 #define call_new(...)\
268  (checkasm_set_signal_handler_state(1),\
269  checked_call(func_new, __VA_ARGS__));\
270  checkasm_set_signal_handler_state(0)
271 #endif
272 #elif ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
273 /* Use a dummy argument, to offset the real parameters by 2, not only 1.
274  * This makes sure that potential 8-byte-alignment of parameters is kept the same
275  * even when the extra parameters have been removed. */
276 void checkasm_checked_call_vfp(void *func, int dummy, ...);
277 void checkasm_checked_call_novfp(void *func, int dummy, ...);
278 extern void (*checkasm_checked_call)(void *func, int dummy, ...);
279 #define declare_new(ret, ...) ret (*checked_call)(void *, int dummy, __VA_ARGS__, \
280  int, int, int, int, int, int, int, int, \
281  int, int, int, int, int, int, int) = (void *)checkasm_checked_call;
282 #define call_new(...) \
283  (checkasm_set_signal_handler_state(1),\
284  checked_call(func_new, 0, __VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0));\
285  checkasm_set_signal_handler_state(0)
286 #elif ARCH_AARCH64 && !defined(__APPLE__)
287 void checkasm_stack_clobber(uint64_t clobber, ...);
288 void checkasm_checked_call(void *func, ...);
289 #define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, int, int, __VA_ARGS__,\
290  int, int, int, int, int, int, int, int,\
291  int, int, int, int, int, int, int)\
292  = (void *)checkasm_checked_call;
293 #define CLOB (UINT64_C(0xdeadbeefdeadbeef))
294 #define call_new(...) (checkasm_set_signal_handler_state(1),\
295  checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
296  CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
297  checked_call(func_new, 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__,\
298  7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0));\
299  checkasm_set_signal_handler_state(0)
300 #elif ARCH_RISCV
301 void checkasm_set_function(void *);
302 void *checkasm_get_wrapper(void);
303 
304 #if HAVE_RV && (__riscv_xlen == 64) && defined (__riscv_d)
305 #define declare_new(ret, ...) \
306  ret (*checked_call)(__VA_ARGS__) = checkasm_get_wrapper();
307 #define call_new(...) \
308  (checkasm_set_signal_handler_state(1),\
309  checkasm_set_function(func_new), checked_call(__VA_ARGS__));\
310  checkasm_set_signal_handler_state(0)
311 #else
312 #define declare_new(ret, ...)
313 #define call_new(...)\
314  (checkasm_set_signal_handler_state(1),\
315  ((func_type *)func_new)(__VA_ARGS__));\
316  checkasm_set_signal_handler_state(0)
317 #endif
318 #else
319 #define declare_new(ret, ...)
320 #define declare_new_float(ret, ...)
321 #define declare_new_emms(cpu_flags, ret, ...)
322 /* Call the function */
323 #define call_new(...)\
324  (checkasm_set_signal_handler_state(1),\
325  ((func_type *)func_new)(__VA_ARGS__));\
326  checkasm_set_signal_handler_state(0)
327 #endif
328 
329 #ifndef declare_new_emms
330 #define declare_new_emms(cpu_flags, ret, ...) declare_new(ret, __VA_ARGS__)
331 #endif
332 #ifndef declare_new_float
333 #define declare_new_float(ret, ...) declare_new(ret, __VA_ARGS__)
334 #endif
335 
336 typedef struct CheckasmPerf {
337  int sysfd;
338  uint64_t cycles;
339  int iterations;
340 } CheckasmPerf;
341 
342 #if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
343 
344 #if CONFIG_LINUX_PERF
345 #define PERF_START(t) do { \
346  ioctl(sysfd, PERF_EVENT_IOC_RESET, 0); \
347  ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0); \
348 } while (0)
349 #define PERF_STOP(t) do { \
350  int ret; \
351  ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
352  ret = read(sysfd, &t, sizeof(t)); \
353  (void)ret; \
354 } while (0)
355 #elif CONFIG_MACOS_KPERF
356 #define PERF_START(t) t = ff_kperf_cycles()
357 #define PERF_STOP(t) t = ff_kperf_cycles() - t
358 #else
359 #define PERF_START(t) t = AV_READ_TIME()
360 #define PERF_STOP(t) t = AV_READ_TIME() - t
361 #endif
362 
363 #define CALL4(...)\
364  do {\
365  tfunc(__VA_ARGS__); \
366  tfunc(__VA_ARGS__); \
367  tfunc(__VA_ARGS__); \
368  tfunc(__VA_ARGS__); \
369  } while (0)
370 
371 #define CALL16(...)\
372  do {\
373  CALL4(__VA_ARGS__); \
374  CALL4(__VA_ARGS__); \
375  CALL4(__VA_ARGS__); \
376  CALL4(__VA_ARGS__); \
377  } while (0)
378 
379 /* Benchmark the function */
380 #define bench_new(...)\
381  do {\
382  if (checkasm_bench_func()) {\
383  struct CheckasmPerf *perf = checkasm_get_perf_context();\
384  av_unused const int sysfd = perf->sysfd;\
385  func_type *tfunc = func_new;\
386  uint64_t tsum = 0;\
387  uint64_t ti, tcount = 0;\
388  uint64_t t = 0; \
389  const uint64_t truns = FFMAX(bench_runs >> 3, 1);\
390  checkasm_set_signal_handler_state(1);\
391  for (ti = 0; ti < truns; ti++) {\
392  PERF_START(t);\
393  CALL16(__VA_ARGS__);\
394  CALL16(__VA_ARGS__);\
395  PERF_STOP(t);\
396  if (t*tcount <= tsum*4 && ti > 0) {\
397  tsum += t;\
398  tcount++;\
399  }\
400  }\
401  emms_c();\
402  perf->cycles += tsum;\
403  perf->iterations += tcount;\
404  checkasm_set_signal_handler_state(0);\
405  }\
406  } while (0)
407 #else
408 #define bench_new(...) while(0)
409 #define PERF_START(t) while(0)
410 #define PERF_STOP(t) while(0)
411 #endif
412 
413 #define BUF_RECT(type, name, w, h) \
414  LOCAL_ALIGNED_32(type, name##_buf, [((h)+32)*(FFALIGN(w,64)+64) + 64]); \
415  av_unused ptrdiff_t name##_stride = sizeof(type)*(FFALIGN(w,64)+64); \
416  av_unused int name##_buf_h = (h)+32; \
417  type *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
418 
419 #define PIXEL_RECT(name, w, h) \
420  LOCAL_ALIGNED_32(uint8_t, name##_buf, [sizeof(uint16_t) * (((h)+32)*(FFALIGN(w,64)+64) + 64)],); \
421  av_unused ptrdiff_t name##_stride = sizeof(uint16_t) * (FFALIGN(w,64)+64); \
422  av_unused int name##_buf_h = (h)+32; \
423  uint8_t *name = name##_buf + (FFALIGN(w,64)+64)*16 + 64
424 
425 #define CLEAR_BUF_RECT(name) \
426  memset(name##_buf, 0x99, name##_stride * name##_buf_h + 64)
427 #define CLEAR_PIXEL_RECT(name) \
428  CLEAR_BUF_RECT(name)
429 
430 #define DECL_CHECKASM_CHECK_FUNC(type) \
431 int checkasm_check_##type(const char *file, int line, \
432  const type *buf1, ptrdiff_t stride1, \
433  const type *buf2, ptrdiff_t stride2, \
434  int w, int h, const char *name, \
435  int align_w, int align_h, \
436  int padding)
437 
438 DECL_CHECKASM_CHECK_FUNC(uint8_t);
439 DECL_CHECKASM_CHECK_FUNC(uint16_t);
440 DECL_CHECKASM_CHECK_FUNC(uint32_t);
441 DECL_CHECKASM_CHECK_FUNC(int16_t);
442 DECL_CHECKASM_CHECK_FUNC(int32_t);
443 
444 int checkasm_check_float_ulp(const char *file, int line,
445  const float *buf1, ptrdiff_t stride1,
446  const float *buf2, ptrdiff_t stride2,
447  int w, int h, const char *name,
448  unsigned max_ulp, int align_w, int align_h,
449  int padding);
450 
451 #define PASTE(a,b) a ## b
452 #define CONCAT(a,b) PASTE(a,b)
453 
454 #define checkasm_check2(prefix, ...) CONCAT(checkasm_check_, prefix)(__FILE__, __LINE__, __VA_ARGS__)
455 #define checkasm_check(prefix, ...) checkasm_check2(prefix, __VA_ARGS__, 0, 0, 0)
456 /* Check a pointer from BUF_RECT, checking whether there have been
457  * writes outside of the designated area. */
458 #define checkasm_check_padded(...) \
459  checkasm_check2(__VA_ARGS__, 1, 1, 8)
460 /* Check a pointer from BUF_RECT, checking whether there have been
461  * writes outside of the designated area. Allow writing slightly past the
462  * end of the buffer, by aligning w/h to align_w/align_h, and checking
463  * for overwrites outside of that. */
464 #define checkasm_check_padded_align(...) \
465  checkasm_check2(__VA_ARGS__, 8)
466 
467 /* This assumes that there is a local variable named "bit_depth".
468  * For tests that don't have that and only operate on a single
469  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
470 #define checkasm_check_pixel2(buf1, stride1, buf2, stride2, ...) \
471  ((bit_depth > 8) ? \
472  checkasm_check2(uint16_t, (const uint16_t*)buf1, stride1, \
473  (const uint16_t*)buf2, stride2, \
474  __VA_ARGS__) : \
475  checkasm_check2(uint8_t, (const uint8_t*) buf1, stride1, \
476  (const uint8_t*) buf2, stride2, \
477  __VA_ARGS__))
478 #define checkasm_check_pixel(...) \
479  checkasm_check_pixel2(__VA_ARGS__, 0, 0, 0)
480 #define checkasm_check_pixel_padded(...) \
481  checkasm_check_pixel2(__VA_ARGS__, 1, 1, 8)
482 #define checkasm_check_pixel_padded_align(...) \
483  checkasm_check_pixel2(__VA_ARGS__, 8)
484 
485 /* This assumes that there is a local variable named "bit_depth"
486  * and that the type-specific buffers obey the name ## _BITDEPTH
487  * convention.
488  * For tests that don't have that and only operate on a single
489  * bitdepth, just call checkasm_check(uint8_t, ...) directly. */
490 #define checkasm_check_dctcoef(buf1, stride1, buf2, stride2, ...) \
491  ((bit_depth > 8) ? \
492  checkasm_check(int32_t, buf1 ## _32, stride1, \
493  buf2 ## _32, stride2, \
494  __VA_ARGS__) : \
495  checkasm_check(int16_t, buf1 ## _16, stride1, \
496  buf2 ## _16, stride2, \
497  __VA_ARGS__))
498 
499 #endif /* TESTS_CHECKASM_CHECKASM_H */
checkasm_check_nlmeans
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Definition: vf_nlmeans.c:32
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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
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void checkasm_check_v210dec(void)
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checkasm_check_sw_yuv2yuv
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checkasm_check_hevc_idct
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checkasm_check_func
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CheckasmPerf::sysfd
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checkasm_check_alacdsp
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CheckasmPerf
Definition: checkasm.h:336
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checkasm_check_bswapdsp
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s
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checkasm_check_vf_bwdif
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void checkasm_check_hevc_sao(void)
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CheckasmPerf::iterations
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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
Definition: undefined.txt:32
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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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Definition: rv34dsp.c:82
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