mirror of https://git.ffmpeg.org/ffmpeg.git
652 lines
17 KiB
C
652 lines
17 KiB
C
/*
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* Assembly testing and benchmarking tool
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* Copyright (c) 2015 Henrik Gramner
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* Copyright (c) 2008 Loren Merritt
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Libav; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "checkasm.h"
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#include "libavutil/common.h"
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#include "libavutil/cpu.h"
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#include "libavutil/intfloat.h"
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#include "libavutil/random_seed.h"
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#if HAVE_IO_H
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#include <io.h>
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#endif
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#if HAVE_SETCONSOLETEXTATTRIBUTE
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#include <windows.h>
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#define COLOR_RED FOREGROUND_RED
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#define COLOR_GREEN FOREGROUND_GREEN
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#define COLOR_YELLOW (FOREGROUND_RED|FOREGROUND_GREEN)
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#else
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#define COLOR_RED 1
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#define COLOR_GREEN 2
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#define COLOR_YELLOW 3
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if !HAVE_ISATTY
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#define isatty(fd) 1
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#endif
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#if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
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#include "libavutil/arm/cpu.h"
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void (*checkasm_checked_call)(void *func, int dummy, ...) = checkasm_checked_call_novfp;
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#endif
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/* List of tests to invoke */
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static const struct {
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const char *name;
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void (*func)(void);
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} tests[] = {
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#if CONFIG_BSWAPDSP
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{ "bswapdsp", checkasm_check_bswapdsp },
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#endif
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#if CONFIG_DCA_DECODER
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{ "dcadsp", checkasm_check_dcadsp },
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{ "synth_filter", checkasm_check_synth_filter },
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#endif
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#if CONFIG_FMTCONVERT
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{ "fmtconvert", checkasm_check_fmtconvert },
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#endif
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#if CONFIG_H264DSP
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{ "h264dsp", checkasm_check_h264dsp },
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#endif
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#if CONFIG_H264PRED
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{ "h264pred", checkasm_check_h264pred },
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#endif
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#if CONFIG_H264QPEL
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{ "h264qpel", checkasm_check_h264qpel },
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#endif
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#if CONFIG_HEVC_DECODER
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{ "hevc_mc", checkasm_check_hevc_mc },
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{ "hevc_idct", checkasm_check_hevc_idct },
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#endif
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#if CONFIG_V210_ENCODER
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{ "v210enc", checkasm_check_v210enc },
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#endif
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#if CONFIG_VP8DSP
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{ "vp8dsp", checkasm_check_vp8dsp },
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#endif
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#if CONFIG_VP9_DECODER
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{ "vp9dsp", checkasm_check_vp9dsp },
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#endif
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{ NULL }
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};
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/* List of cpu flags to check */
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static const struct {
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const char *name;
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const char *suffix;
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int flag;
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} cpus[] = {
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#if ARCH_AARCH64
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{ "ARMV8", "armv8", AV_CPU_FLAG_ARMV8 },
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{ "NEON", "neon", AV_CPU_FLAG_NEON },
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#elif ARCH_ARM
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{ "ARMV5TE", "armv5te", AV_CPU_FLAG_ARMV5TE },
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{ "ARMV6", "armv6", AV_CPU_FLAG_ARMV6 },
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{ "ARMV6T2", "armv6t2", AV_CPU_FLAG_ARMV6T2 },
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{ "VFP", "vfp", AV_CPU_FLAG_VFP },
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{ "VFP_VM", "vfp_vm", AV_CPU_FLAG_VFP_VM },
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{ "VFPV3", "vfp3", AV_CPU_FLAG_VFPV3 },
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{ "NEON", "neon", AV_CPU_FLAG_NEON },
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#elif ARCH_PPC
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{ "ALTIVEC", "altivec", AV_CPU_FLAG_ALTIVEC },
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{ "VSX", "vsx", AV_CPU_FLAG_VSX },
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{ "POWER8", "power8", AV_CPU_FLAG_POWER8 },
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#elif ARCH_X86
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{ "MMX", "mmx", AV_CPU_FLAG_MMX|AV_CPU_FLAG_CMOV },
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{ "MMXEXT", "mmxext", AV_CPU_FLAG_MMXEXT },
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{ "3DNOW", "3dnow", AV_CPU_FLAG_3DNOW },
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{ "3DNOWEXT", "3dnowext", AV_CPU_FLAG_3DNOWEXT },
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{ "SSE", "sse", AV_CPU_FLAG_SSE },
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{ "SSE2", "sse2", AV_CPU_FLAG_SSE2|AV_CPU_FLAG_SSE2SLOW },
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{ "SSE3", "sse3", AV_CPU_FLAG_SSE3|AV_CPU_FLAG_SSE3SLOW },
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{ "SSSE3", "ssse3", AV_CPU_FLAG_SSSE3|AV_CPU_FLAG_ATOM },
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{ "SSE4.1", "sse4", AV_CPU_FLAG_SSE4 },
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{ "SSE4.2", "sse42", AV_CPU_FLAG_SSE42 },
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{ "AVX", "avx", AV_CPU_FLAG_AVX },
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{ "XOP", "xop", AV_CPU_FLAG_XOP },
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{ "FMA3", "fma3", AV_CPU_FLAG_FMA3 },
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{ "FMA4", "fma4", AV_CPU_FLAG_FMA4 },
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{ "AVX2", "avx2", AV_CPU_FLAG_AVX2 },
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#endif
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{ NULL }
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};
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typedef struct CheckasmFuncVersion {
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struct CheckasmFuncVersion *next;
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void *func;
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int ok;
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int cpu;
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int iterations;
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uint64_t cycles;
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} CheckasmFuncVersion;
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/* Binary search tree node */
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typedef struct CheckasmFunc {
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struct CheckasmFunc *child[2];
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CheckasmFuncVersion versions;
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uint8_t color; /* 0 = red, 1 = black */
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char name[1];
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} CheckasmFunc;
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/* Internal state */
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static struct {
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CheckasmFunc *funcs;
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CheckasmFunc *current_func;
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CheckasmFuncVersion *current_func_ver;
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const char *current_test_name;
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const char *bench_pattern;
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int bench_pattern_len;
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int num_checked;
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int num_failed;
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int nop_time;
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int cpu_flag;
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const char *cpu_flag_name;
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} state;
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/* PRNG state */
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AVLFG checkasm_lfg;
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/* float compare support code */
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static int is_negative(union av_intfloat32 u)
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{
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return u.i >> 31;
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}
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int float_near_ulp(float a, float b, unsigned max_ulp)
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{
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union av_intfloat32 x, y;
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x.f = a;
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y.f = b;
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if (is_negative(x) != is_negative(y)) {
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// handle -0.0 == +0.0
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return a == b;
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}
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if (llabs((int64_t)x.i - y.i) <= max_ulp)
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return 1;
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return 0;
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}
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int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
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unsigned len)
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{
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unsigned i;
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for (i = 0; i < len; i++) {
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if (!float_near_ulp(a[i], b[i], max_ulp))
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return 0;
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}
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return 1;
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}
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int float_near_abs_eps(float a, float b, float eps)
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{
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float abs_diff = fabsf(a - b);
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return abs_diff < eps;
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}
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int float_near_abs_eps_array(const float *a, const float *b, float eps,
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unsigned len)
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{
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unsigned i;
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for (i = 0; i < len; i++) {
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if (!float_near_abs_eps(a[i], b[i], eps))
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return 0;
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}
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return 1;
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}
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int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
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{
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return float_near_ulp(a, b, max_ulp) || float_near_abs_eps(a, b, eps);
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}
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int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
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unsigned max_ulp, unsigned len)
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{
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unsigned i;
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for (i = 0; i < len; i++) {
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if (!float_near_abs_eps_ulp(a[i], b[i], eps, max_ulp))
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return 0;
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}
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return 1;
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}
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/* Print colored text to stderr if the terminal supports it */
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static void color_printf(int color, const char *fmt, ...)
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{
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static int use_color = -1;
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va_list arg;
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#if HAVE_SETCONSOLETEXTATTRIBUTE
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static HANDLE con;
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static WORD org_attributes;
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if (use_color < 0) {
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CONSOLE_SCREEN_BUFFER_INFO con_info;
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con = GetStdHandle(STD_ERROR_HANDLE);
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if (con && con != INVALID_HANDLE_VALUE && GetConsoleScreenBufferInfo(con, &con_info)) {
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org_attributes = con_info.wAttributes;
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use_color = 1;
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} else
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use_color = 0;
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}
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if (use_color)
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SetConsoleTextAttribute(con, (org_attributes & 0xfff0) | (color & 0x0f));
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#else
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if (use_color < 0) {
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const char *term = getenv("TERM");
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use_color = term && strcmp(term, "dumb") && isatty(2);
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}
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if (use_color)
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fprintf(stderr, "\x1b[%d;3%dm", (color & 0x08) >> 3, color & 0x07);
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#endif
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va_start(arg, fmt);
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vfprintf(stderr, fmt, arg);
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va_end(arg);
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if (use_color) {
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#if HAVE_SETCONSOLETEXTATTRIBUTE
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SetConsoleTextAttribute(con, org_attributes);
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#else
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fprintf(stderr, "\x1b[0m");
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#endif
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}
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}
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/* Deallocate a tree */
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static void destroy_func_tree(CheckasmFunc *f)
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{
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if (f) {
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CheckasmFuncVersion *v = f->versions.next;
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while (v) {
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CheckasmFuncVersion *next = v->next;
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free(v);
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v = next;
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}
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destroy_func_tree(f->child[0]);
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destroy_func_tree(f->child[1]);
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free(f);
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}
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}
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/* Allocate a zero-initialized block, clean up and exit on failure */
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static void *checkasm_malloc(size_t size)
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{
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void *ptr = calloc(1, size);
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if (!ptr) {
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fprintf(stderr, "checkasm: malloc failed\n");
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destroy_func_tree(state.funcs);
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exit(1);
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}
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return ptr;
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}
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/* Get the suffix of the specified cpu flag */
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static const char *cpu_suffix(int cpu)
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{
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int i = FF_ARRAY_ELEMS(cpus);
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while (--i >= 0)
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if (cpu & cpus[i].flag)
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return cpus[i].suffix;
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return "c";
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}
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#ifdef AV_READ_TIME
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static int cmp_nop(const void *a, const void *b)
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{
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return *(const uint16_t*)a - *(const uint16_t*)b;
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}
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/* Measure the overhead of the timing code (in decicycles) */
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static int measure_nop_time(void)
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{
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uint16_t nops[10000];
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int i, nop_sum = 0;
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for (i = 0; i < 10000; i++) {
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uint64_t t = AV_READ_TIME();
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nops[i] = AV_READ_TIME() - t;
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}
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qsort(nops, 10000, sizeof(uint16_t), cmp_nop);
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for (i = 2500; i < 7500; i++)
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nop_sum += nops[i];
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return nop_sum / 500;
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}
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/* Print benchmark results */
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static void print_benchs(CheckasmFunc *f)
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{
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if (f) {
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print_benchs(f->child[0]);
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/* Only print functions with at least one assembly version */
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if (f->versions.cpu || f->versions.next) {
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CheckasmFuncVersion *v = &f->versions;
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do {
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if (v->iterations) {
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int decicycles = (10*v->cycles/v->iterations - state.nop_time) / 4;
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printf("%s_%s: %d.%d\n", f->name, cpu_suffix(v->cpu), decicycles/10, decicycles%10);
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}
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} while ((v = v->next));
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}
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print_benchs(f->child[1]);
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}
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}
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#endif
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/* ASCIIbetical sort except preserving natural order for numbers */
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static int cmp_func_names(const char *a, const char *b)
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{
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const char *start = a;
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int ascii_diff, digit_diff;
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for (; !(ascii_diff = *(const unsigned char*)a - *(const unsigned char*)b) && *a; a++, b++);
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for (; av_isdigit(*a) && av_isdigit(*b); a++, b++);
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if (a > start && av_isdigit(a[-1]) && (digit_diff = av_isdigit(*a) - av_isdigit(*b)))
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return digit_diff;
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return ascii_diff;
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}
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/* Perform a tree rotation in the specified direction and return the new root */
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static CheckasmFunc *rotate_tree(CheckasmFunc *f, int dir)
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{
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CheckasmFunc *r = f->child[dir^1];
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f->child[dir^1] = r->child[dir];
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r->child[dir] = f;
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r->color = f->color;
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f->color = 0;
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return r;
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}
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#define is_red(f) ((f) && !(f)->color)
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/* Balance a left-leaning red-black tree at the specified node */
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static void balance_tree(CheckasmFunc **root)
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{
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CheckasmFunc *f = *root;
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if (is_red(f->child[0]) && is_red(f->child[1])) {
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f->color ^= 1;
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f->child[0]->color = f->child[1]->color = 1;
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}
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if (!is_red(f->child[0]) && is_red(f->child[1]))
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*root = rotate_tree(f, 0); /* Rotate left */
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else if (is_red(f->child[0]) && is_red(f->child[0]->child[0]))
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*root = rotate_tree(f, 1); /* Rotate right */
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}
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/* Get a node with the specified name, creating it if it doesn't exist */
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static CheckasmFunc *get_func(CheckasmFunc **root, const char *name)
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{
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CheckasmFunc *f = *root;
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if (f) {
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/* Search the tree for a matching node */
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int cmp = cmp_func_names(name, f->name);
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if (cmp) {
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f = get_func(&f->child[cmp > 0], name);
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/* Rebalance the tree on the way up if a new node was inserted */
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if (!f->versions.func)
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balance_tree(root);
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}
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} else {
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/* Allocate and insert a new node into the tree */
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int name_length = strlen(name);
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f = *root = checkasm_malloc(sizeof(CheckasmFunc) + name_length);
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memcpy(f->name, name, name_length + 1);
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}
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return f;
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}
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/* Perform tests and benchmarks for the specified cpu flag if supported by the host */
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static void check_cpu_flag(const char *name, int flag)
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{
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int old_cpu_flag = state.cpu_flag;
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flag |= old_cpu_flag;
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av_set_cpu_flags_mask(flag);
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state.cpu_flag = av_get_cpu_flags();
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if (!flag || state.cpu_flag != old_cpu_flag) {
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int i;
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state.cpu_flag_name = name;
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for (i = 0; tests[i].func; i++) {
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state.current_test_name = tests[i].name;
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tests[i].func();
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}
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}
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}
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/* Print the name of the current CPU flag, but only do it once */
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static void print_cpu_name(void)
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{
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if (state.cpu_flag_name) {
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color_printf(COLOR_YELLOW, "%s:\n", state.cpu_flag_name);
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state.cpu_flag_name = NULL;
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}
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}
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int main(int argc, char *argv[])
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{
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unsigned int seed;
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int i, ret = 0;
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#if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
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if (have_vfp(av_get_cpu_flags()) || have_neon(av_get_cpu_flags()))
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checkasm_checked_call = checkasm_checked_call_vfp;
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#endif
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if (!tests[0].func || !cpus[0].flag) {
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fprintf(stderr, "checkasm: no tests to perform\n");
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return 0;
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}
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if (argc > 1 && !strncmp(argv[1], "--bench", 7)) {
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#ifndef AV_READ_TIME
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fprintf(stderr, "checkasm: --bench is not supported on your system\n");
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return 1;
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#endif
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if (argv[1][7] == '=') {
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state.bench_pattern = argv[1] + 8;
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state.bench_pattern_len = strlen(state.bench_pattern);
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} else
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state.bench_pattern = "";
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argc--;
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argv++;
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}
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seed = (argc > 1) ? strtoul(argv[1], NULL, 10) : av_get_random_seed();
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fprintf(stderr, "checkasm: using random seed %u\n", seed);
|
|
av_lfg_init(&checkasm_lfg, seed);
|
|
|
|
check_cpu_flag(NULL, 0);
|
|
for (i = 0; cpus[i].flag; i++)
|
|
check_cpu_flag(cpus[i].name, cpus[i].flag);
|
|
|
|
if (state.num_failed) {
|
|
fprintf(stderr, "checkasm: %d of %d tests have failed\n", state.num_failed, state.num_checked);
|
|
ret = 1;
|
|
} else {
|
|
fprintf(stderr, "checkasm: all %d tests passed\n", state.num_checked);
|
|
#ifdef AV_READ_TIME
|
|
if (state.bench_pattern) {
|
|
state.nop_time = measure_nop_time();
|
|
printf("nop: %d.%d\n", state.nop_time/10, state.nop_time%10);
|
|
print_benchs(state.funcs);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
destroy_func_tree(state.funcs);
|
|
return ret;
|
|
}
|
|
|
|
/* Decide whether or not the specified function needs to be tested and
|
|
* allocate/initialize data structures if needed. Returns a pointer to a
|
|
* reference function if the function should be tested, otherwise NULL */
|
|
void *checkasm_check_func(void *func, const char *name, ...)
|
|
{
|
|
char name_buf[256];
|
|
void *ref = func;
|
|
CheckasmFuncVersion *v;
|
|
int name_length;
|
|
va_list arg;
|
|
|
|
va_start(arg, name);
|
|
name_length = vsnprintf(name_buf, sizeof(name_buf), name, arg);
|
|
va_end(arg);
|
|
|
|
if (!func || name_length <= 0 || name_length >= sizeof(name_buf))
|
|
return NULL;
|
|
|
|
state.current_func = get_func(&state.funcs, name_buf);
|
|
state.funcs->color = 1;
|
|
v = &state.current_func->versions;
|
|
|
|
if (v->func) {
|
|
CheckasmFuncVersion *prev;
|
|
do {
|
|
/* Only test functions that haven't already been tested */
|
|
if (v->func == func)
|
|
return NULL;
|
|
|
|
if (v->ok)
|
|
ref = v->func;
|
|
|
|
prev = v;
|
|
} while ((v = v->next));
|
|
|
|
v = prev->next = checkasm_malloc(sizeof(CheckasmFuncVersion));
|
|
}
|
|
|
|
v->func = func;
|
|
v->ok = 1;
|
|
v->cpu = state.cpu_flag;
|
|
state.current_func_ver = v;
|
|
|
|
if (state.cpu_flag)
|
|
state.num_checked++;
|
|
|
|
return ref;
|
|
}
|
|
|
|
/* Decide whether or not the current function needs to be benchmarked */
|
|
int checkasm_bench_func(void)
|
|
{
|
|
return !state.num_failed && state.bench_pattern &&
|
|
!strncmp(state.current_func->name, state.bench_pattern, state.bench_pattern_len);
|
|
}
|
|
|
|
/* Indicate that the current test has failed */
|
|
void checkasm_fail_func(const char *msg, ...)
|
|
{
|
|
if (state.current_func_ver->cpu && state.current_func_ver->ok) {
|
|
va_list arg;
|
|
|
|
print_cpu_name();
|
|
fprintf(stderr, " %s_%s (", state.current_func->name, cpu_suffix(state.current_func_ver->cpu));
|
|
va_start(arg, msg);
|
|
vfprintf(stderr, msg, arg);
|
|
va_end(arg);
|
|
fprintf(stderr, ")\n");
|
|
|
|
state.current_func_ver->ok = 0;
|
|
state.num_failed++;
|
|
}
|
|
}
|
|
|
|
/* Update benchmark results of the current function */
|
|
void checkasm_update_bench(int iterations, uint64_t cycles)
|
|
{
|
|
state.current_func_ver->iterations += iterations;
|
|
state.current_func_ver->cycles += cycles;
|
|
}
|
|
|
|
/* Print the outcome of all tests performed since the last time this function was called */
|
|
void checkasm_report(const char *name, ...)
|
|
{
|
|
static int prev_checked, prev_failed, max_length;
|
|
|
|
if (state.num_checked > prev_checked) {
|
|
int pad_length = max_length + 4;
|
|
va_list arg;
|
|
|
|
print_cpu_name();
|
|
pad_length -= fprintf(stderr, " - %s.", state.current_test_name);
|
|
va_start(arg, name);
|
|
pad_length -= vfprintf(stderr, name, arg);
|
|
va_end(arg);
|
|
fprintf(stderr, "%*c", FFMAX(pad_length, 0) + 2, '[');
|
|
|
|
if (state.num_failed == prev_failed)
|
|
color_printf(COLOR_GREEN, "OK");
|
|
else
|
|
color_printf(COLOR_RED, "FAILED");
|
|
fprintf(stderr, "]\n");
|
|
|
|
prev_checked = state.num_checked;
|
|
prev_failed = state.num_failed;
|
|
} else if (!state.cpu_flag) {
|
|
/* Calculate the amount of padding required to make the output vertically aligned */
|
|
int length = strlen(state.current_test_name);
|
|
va_list arg;
|
|
|
|
va_start(arg, name);
|
|
length += vsnprintf(NULL, 0, name, arg);
|
|
va_end(arg);
|
|
|
|
if (length > max_length)
|
|
max_length = length;
|
|
}
|
|
}
|