mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
c91d6a33f8
This, combined with clobbering the stack space prior to the call, increases the chances of finding cases where 32 bit parameters are erroneously treated as 64 bit. Signed-off-by: Martin Storsjö <martin@martin.st>
185 lines
8.2 KiB
C
185 lines
8.2 KiB
C
/*
|
|
* Assembly testing and benchmarking tool
|
|
* Copyright (c) 2015 Henrik Gramner
|
|
* Copyright (c) 2008 Loren Merritt
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with Libav; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef TESTS_CHECKASM_CHECKASM_H
|
|
#define TESTS_CHECKASM_CHECKASM_H
|
|
|
|
#include <stdint.h>
|
|
#include "config.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/lfg.h"
|
|
#include "libavutil/timer.h"
|
|
|
|
void checkasm_check_audiodsp(void);
|
|
void checkasm_check_blockdsp(void);
|
|
void checkasm_check_bswapdsp(void);
|
|
void checkasm_check_dcadsp(void);
|
|
void checkasm_check_fmtconvert(void);
|
|
void checkasm_check_h264dsp(void);
|
|
void checkasm_check_h264pred(void);
|
|
void checkasm_check_h264qpel(void);
|
|
void checkasm_check_hevc_idct(void);
|
|
void checkasm_check_hevc_mc(void);
|
|
void checkasm_check_huffyuvdsp(void);
|
|
void checkasm_check_synth_filter(void);
|
|
void checkasm_check_v210enc(void);
|
|
void checkasm_check_vp8dsp(void);
|
|
void checkasm_check_vp9dsp(void);
|
|
|
|
void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
|
|
int checkasm_bench_func(void);
|
|
void checkasm_fail_func(const char *msg, ...) av_printf_format(1, 2);
|
|
void checkasm_update_bench(int iterations, uint64_t cycles);
|
|
void checkasm_report(const char *name, ...) av_printf_format(1, 2);
|
|
|
|
/* float compare utilities */
|
|
int float_near_ulp(float a, float b, unsigned max_ulp);
|
|
int float_near_abs_eps(float a, float b, float eps);
|
|
int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
|
|
int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
|
|
unsigned len);
|
|
int float_near_abs_eps_array(const float *a, const float *b, float eps,
|
|
unsigned len);
|
|
int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
|
|
unsigned max_ulp, unsigned len);
|
|
|
|
extern AVLFG checkasm_lfg;
|
|
#define rnd() av_lfg_get(&checkasm_lfg)
|
|
|
|
static av_unused void *func_ref, *func_new;
|
|
|
|
#define BENCH_RUNS 1000 /* Trade-off between accuracy and speed */
|
|
|
|
/* Decide whether or not the specified function needs to be tested */
|
|
#define check_func(func, ...) (func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
|
|
|
|
/* Declare the function prototype. The first argument is the return value, the remaining
|
|
* arguments are the function parameters. Naming parameters is optional. */
|
|
#define declare_func(ret, ...) declare_new(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
|
|
#define declare_func_emms(cpu_flags, ret, ...) declare_new_emms(cpu_flags, ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
|
|
|
|
/* Indicate that the current test has failed */
|
|
#define fail() checkasm_fail_func("%s:%d", av_basename(__FILE__), __LINE__)
|
|
|
|
/* Print the test outcome */
|
|
#define report checkasm_report
|
|
|
|
/* Call the reference function */
|
|
#define call_ref(...) ((func_type *)func_ref)(__VA_ARGS__)
|
|
|
|
#if ARCH_X86 && HAVE_YASM
|
|
/* Verifies that clobbered callee-saved registers are properly saved and restored
|
|
* and that either no MMX registers are touched or emms is issued */
|
|
void checkasm_checked_call(void *func, ...);
|
|
/* Verifies that clobbered callee-saved registers are properly saved and restored
|
|
* and issues emms for asm functions which are not required to do so */
|
|
void checkasm_checked_call_emms(void *func, ...);
|
|
|
|
#if ARCH_X86_64
|
|
/* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
|
|
* This is done by clobbering the stack with junk around the stack pointer and calling the
|
|
* assembly function through checked_call() with added dummy arguments which forces all
|
|
* real arguments to be passed on the stack and not in registers. For 32-bit arguments the
|
|
* upper half of the 64-bit register locations on the stack will now contain junk which will
|
|
* cause misbehaving functions to either produce incorrect output or segfault. Note that
|
|
* even though this works extremely well in practice, it's technically not guaranteed
|
|
* and false negatives is theoretically possible, but there can never be any false positives.
|
|
*/
|
|
void checkasm_stack_clobber(uint64_t clobber, ...);
|
|
#define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
|
|
= (void *)checkasm_checked_call;
|
|
#define declare_new_emms(cpu_flags, ret, ...) \
|
|
ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) = \
|
|
((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
|
|
(void *)checkasm_checked_call;
|
|
#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
|
|
#define call_new(...) (checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
|
|
CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
|
|
checked_call(func_new, 0, 0, 0, 0, 0, __VA_ARGS__))
|
|
#elif ARCH_X86_32
|
|
#define declare_new(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
|
|
#define declare_new_emms(cpu_flags, ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = \
|
|
((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
|
|
(void *)checkasm_checked_call;
|
|
#define call_new(...) checked_call(func_new, __VA_ARGS__)
|
|
#endif
|
|
#elif ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
|
|
/* Use a dummy argument, to offset the real parameters by 2, not only 1.
|
|
* This makes sure that potential 8-byte-alignment of parameters is kept the same
|
|
* even when the extra parameters have been removed. */
|
|
void checkasm_checked_call_vfp(void *func, int dummy, ...);
|
|
void checkasm_checked_call_novfp(void *func, int dummy, ...);
|
|
extern void (*checkasm_checked_call)(void *func, int dummy, ...);
|
|
#define declare_new(ret, ...) ret (*checked_call)(void *, int dummy, __VA_ARGS__) = (void *)checkasm_checked_call;
|
|
#define call_new(...) checked_call(func_new, 0, __VA_ARGS__)
|
|
#elif ARCH_AARCH64 && !defined(__APPLE__)
|
|
void checkasm_stack_clobber(uint64_t clobber, ...);
|
|
void checkasm_checked_call(void *func, ...);
|
|
#define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, int, int, __VA_ARGS__)\
|
|
= (void *)checkasm_checked_call;
|
|
#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
|
|
#define call_new(...) (checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
|
|
CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
|
|
checked_call(func_new, 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__))
|
|
#else
|
|
#define declare_new(ret, ...)
|
|
#define declare_new_emms(cpu_flags, ret, ...)
|
|
/* Call the function */
|
|
#define call_new(...) ((func_type *)func_new)(__VA_ARGS__)
|
|
#endif
|
|
|
|
#ifndef declare_new_emms
|
|
#define declare_new_emms(cpu_flags, ret, ...) declare_new(ret, __VA_ARGS__)
|
|
#endif
|
|
|
|
/* Benchmark the function */
|
|
#ifdef AV_READ_TIME
|
|
#define bench_new(...)\
|
|
do {\
|
|
if (checkasm_bench_func()) {\
|
|
func_type *tfunc = func_new;\
|
|
uint64_t tsum = 0;\
|
|
int ti, tcount = 0;\
|
|
for (ti = 0; ti < BENCH_RUNS; ti++) {\
|
|
uint64_t t = AV_READ_TIME();\
|
|
tfunc(__VA_ARGS__);\
|
|
tfunc(__VA_ARGS__);\
|
|
tfunc(__VA_ARGS__);\
|
|
tfunc(__VA_ARGS__);\
|
|
t = AV_READ_TIME() - t;\
|
|
if (t*tcount <= tsum*4 && ti > 0) {\
|
|
tsum += t;\
|
|
tcount++;\
|
|
}\
|
|
}\
|
|
emms_c();\
|
|
checkasm_update_bench(tcount, tsum);\
|
|
}\
|
|
} while (0)
|
|
#else
|
|
#define bench_new(...) while(0)
|
|
#endif
|
|
|
|
#endif /* TESTS_CHECKASM_CHECKASM_H */
|