/* * Assembly testing and benchmarking tool * Copyright (c) 2015 Henrik Gramner * Copyright (c) 2008 Loren Merritt * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; 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 #include "config.h" #if CONFIG_LINUX_PERF #include // read(3) #include #include #include #endif #include "libavutil/avstring.h" #include "libavutil/cpu.h" #include "libavutil/internal.h" #include "libavutil/lfg.h" #include "libavutil/timer.h" void checkasm_check_aacpsdsp(void); void checkasm_check_alacdsp(void); void checkasm_check_audiodsp(void); void checkasm_check_blend(void); void checkasm_check_blockdsp(void); void checkasm_check_bswapdsp(void); void checkasm_check_colorspace(void); void checkasm_check_fixed_dsp(void); void checkasm_check_flacdsp(void); void checkasm_check_float_dsp(void); void checkasm_check_fmtconvert(void); void checkasm_check_g722dsp(void); void checkasm_check_h264dsp(void); void checkasm_check_h264pred(void); void checkasm_check_h264qpel(void); void checkasm_check_hevc_add_res(void); void checkasm_check_hevc_idct(void); void checkasm_check_jpeg2000dsp(void); void checkasm_check_llviddsp(void); void checkasm_check_pixblockdsp(void); void checkasm_check_sbrdsp(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_videodsp(void); struct CheckasmPerf; 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); struct CheckasmPerf *checkasm_get_perf_context(void); 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); int double_near_abs_eps(double a, double b, double eps); int double_near_abs_eps_array(const double *a, const double *b, double eps, 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_float(ret, ...) declare_new_float(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_X86ASM /* 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, ...); /* Verifies that clobbered callee-saved registers are properly saved and restored * but doesn't issue emms. Meant for dsp functions returning float or double */ void checkasm_checked_call_float(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_float(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\ = (void *)checkasm_checked_call_float; #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_float(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call_float; #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_float(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 #ifndef declare_new_float #define declare_new_float(ret, ...) declare_new(ret, __VA_ARGS__) #endif typedef struct CheckasmPerf { int sysfd; uint64_t cycles; int iterations; } CheckasmPerf; #if defined(AV_READ_TIME) || CONFIG_LINUX_PERF #if CONFIG_LINUX_PERF #define PERF_START(t) do { \ ioctl(sysfd, PERF_EVENT_IOC_RESET, 0); \ ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0); \ } while (0) #define PERF_STOP(t) do { \ ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \ read(sysfd, &t, sizeof(t)); \ } while (0) #else #define PERF_START(t) t = AV_READ_TIME() #define PERF_STOP(t) t = AV_READ_TIME() - t #endif /* Benchmark the function */ #define bench_new(...)\ do {\ if (checkasm_bench_func()) {\ struct CheckasmPerf *perf = checkasm_get_perf_context();\ av_unused const int sysfd = perf->sysfd;\ func_type *tfunc = func_new;\ uint64_t tsum = 0;\ int ti, tcount = 0;\ uint64_t t = 0; \ for (ti = 0; ti < BENCH_RUNS; ti++) {\ PERF_START(t);\ tfunc(__VA_ARGS__);\ tfunc(__VA_ARGS__);\ tfunc(__VA_ARGS__);\ tfunc(__VA_ARGS__);\ PERF_STOP(t);\ if (t*tcount <= tsum*4 && ti > 0) {\ tsum += t;\ tcount++;\ }\ }\ emms_c();\ perf->cycles += t;\ perf->iterations++;\ }\ } while (0) #else #define bench_new(...) while(0) #define PERF_START(t) while(0) #define PERF_STOP(t) while(0) #endif #endif /* TESTS_CHECKASM_CHECKASM_H */