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FFmpeg/tests/checkasm/checkasm.c
Martin Storsjö c65a294f79 checkasm: Print the SVE vector length at startup 
Signed-off-by: Martin Storsjö <martin@martin.st>
2024-09-27 00:06:55 +03:00

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/*
* 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.
*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "config_components.h"
#ifndef _GNU_SOURCE
# define _GNU_SOURCE // for syscall (performance monitoring API), strsignal()
#endif
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "checkasm.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/intfloat.h"
#include "libavutil/random_seed.h"
#if HAVE_IO_H
#include <io.h>
#endif
#if HAVE_PRCTL
#include <sys/prctl.h>
#endif
#if defined(_WIN32) && !defined(SIGBUS)
/* non-standard, use the same value as mingw-w64 */
#define SIGBUS 10
#endif
#if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
#include <windows.h>
#define COLOR_RED FOREGROUND_RED
#define COLOR_GREEN FOREGROUND_GREEN
#define COLOR_YELLOW (FOREGROUND_RED|FOREGROUND_GREEN)
#else
#define COLOR_RED 1
#define COLOR_GREEN 2
#define COLOR_YELLOW 3
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if !HAVE_ISATTY
#define isatty(fd) 1
#endif
#if ARCH_AARCH64
#include "libavutil/aarch64/cpu.h"
#endif
#if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
#include "libavutil/arm/cpu.h"
void (*checkasm_checked_call)(void *func, int dummy, ...) = checkasm_checked_call_novfp;
#endif
/* Trade-off between speed and accuracy */
uint64_t bench_runs = 1U << 10;
/* List of tests to invoke */
static const struct {
const char *name;
void (*func)(void);
} tests[] = {
#if CONFIG_AVCODEC
#if CONFIG_AAC_DECODER
{ "aacpsdsp", checkasm_check_aacpsdsp },
{ "sbrdsp", checkasm_check_sbrdsp },
#endif
#if CONFIG_AAC_ENCODER
{ "aacencdsp", checkasm_check_aacencdsp },
#endif
#if CONFIG_AC3DSP
{ "ac3dsp", checkasm_check_ac3dsp },
#endif
#if CONFIG_ALAC_DECODER
{ "alacdsp", checkasm_check_alacdsp },
#endif
#if CONFIG_AUDIODSP
{ "audiodsp", checkasm_check_audiodsp },
#endif
#if CONFIG_BLOCKDSP
{ "blockdsp", checkasm_check_blockdsp },
#endif
#if CONFIG_BSWAPDSP
{ "bswapdsp", checkasm_check_bswapdsp },
#endif
#if CONFIG_DCA_DECODER
{ "synth_filter", checkasm_check_synth_filter },
#endif
#if CONFIG_EXR_DECODER
{ "exrdsp", checkasm_check_exrdsp },
#endif
#if CONFIG_FDCTDSP
{ "fdctdsp", checkasm_check_fdctdsp },
#endif
#if CONFIG_FLAC_DECODER
{ "flacdsp", checkasm_check_flacdsp },
#endif
#if CONFIG_FMTCONVERT
{ "fmtconvert", checkasm_check_fmtconvert },
#endif
#if CONFIG_G722DSP
{ "g722dsp", checkasm_check_g722dsp },
#endif
#if CONFIG_H263DSP
{ "h263dsp", checkasm_check_h263dsp },
#endif
#if CONFIG_H264CHROMA
{ "h264chroma", checkasm_check_h264chroma },
#endif
#if CONFIG_H264DSP
{ "h264dsp", checkasm_check_h264dsp },
#endif
#if CONFIG_H264PRED
{ "h264pred", checkasm_check_h264pred },
#endif
#if CONFIG_H264QPEL
{ "h264qpel", checkasm_check_h264qpel },
#endif
#if CONFIG_HEVC_DECODER
{ "hevc_add_res", checkasm_check_hevc_add_res },
{ "hevc_deblock", checkasm_check_hevc_deblock },
{ "hevc_idct", checkasm_check_hevc_idct },
{ "hevc_pel", checkasm_check_hevc_pel },
{ "hevc_sao", checkasm_check_hevc_sao },
#endif
#if CONFIG_HUFFYUV_DECODER
{ "huffyuvdsp", checkasm_check_huffyuvdsp },
#endif
#if CONFIG_IDCTDSP
{ "idctdsp", checkasm_check_idctdsp },
#endif
#if CONFIG_JPEG2000_DECODER
{ "jpeg2000dsp", checkasm_check_jpeg2000dsp },
#endif
#if CONFIG_LLAUDDSP
{ "llauddsp", checkasm_check_llauddsp },
#endif
#if CONFIG_HUFFYUVDSP
{ "llviddsp", checkasm_check_llviddsp },
#endif
#if CONFIG_LLVIDENCDSP
{ "llviddspenc", checkasm_check_llviddspenc },
#endif
#if CONFIG_LPC
{ "lpc", checkasm_check_lpc },
#endif
#if CONFIG_ME_CMP
{ "motion", checkasm_check_motion },
#endif
#if CONFIG_MPEGVIDEOENC
{ "mpegvideoencdsp", checkasm_check_mpegvideoencdsp },
#endif
#if CONFIG_OPUS_DECODER
{ "opusdsp", checkasm_check_opusdsp },
#endif
#if CONFIG_PIXBLOCKDSP
{ "pixblockdsp", checkasm_check_pixblockdsp },
#endif
#if CONFIG_RV34DSP
{ "rv34dsp", checkasm_check_rv34dsp },
#endif
#if CONFIG_RV40_DECODER
{ "rv40dsp", checkasm_check_rv40dsp },
#endif
#if CONFIG_SVQ1_ENCODER
{ "svq1enc", checkasm_check_svq1enc },
#endif
#if CONFIG_TAK_DECODER
{ "takdsp", checkasm_check_takdsp },
#endif
#if CONFIG_UTVIDEO_DECODER
{ "utvideodsp", checkasm_check_utvideodsp },
#endif
#if CONFIG_V210_DECODER
{ "v210dec", checkasm_check_v210dec },
#endif
#if CONFIG_V210_ENCODER
{ "v210enc", checkasm_check_v210enc },
#endif
#if CONFIG_VC1DSP
{ "vc1dsp", checkasm_check_vc1dsp },
#endif
#if CONFIG_VP8DSP
{ "vp8dsp", checkasm_check_vp8dsp },
#endif
#if CONFIG_VP9_DECODER
{ "vp9dsp", checkasm_check_vp9dsp },
#endif
#if CONFIG_VIDEODSP
{ "videodsp", checkasm_check_videodsp },
#endif
#if CONFIG_VORBIS_DECODER
{ "vorbisdsp", checkasm_check_vorbisdsp },
#endif
#if CONFIG_VVC_DECODER
{ "vvc_alf", checkasm_check_vvc_alf },
{ "vvc_mc", checkasm_check_vvc_mc },
#endif
#endif
#if CONFIG_AVFILTER
#if CONFIG_AFIR_FILTER
{ "af_afir", checkasm_check_afir },
#endif
#if CONFIG_BLEND_FILTER
{ "vf_blend", checkasm_check_blend },
#endif
#if CONFIG_BWDIF_FILTER
{ "vf_bwdif", checkasm_check_vf_bwdif },
#endif
#if CONFIG_COLORSPACE_FILTER
{ "vf_colorspace", checkasm_check_colorspace },
#endif
#if CONFIG_EQ_FILTER
{ "vf_eq", checkasm_check_vf_eq },
#endif
#if CONFIG_GBLUR_FILTER
{ "vf_gblur", checkasm_check_vf_gblur },
#endif
#if CONFIG_HFLIP_FILTER
{ "vf_hflip", checkasm_check_vf_hflip },
#endif
#if CONFIG_NLMEANS_FILTER
{ "vf_nlmeans", checkasm_check_nlmeans },
#endif
#if CONFIG_THRESHOLD_FILTER
{ "vf_threshold", checkasm_check_vf_threshold },
#endif
#if CONFIG_SOBEL_FILTER
{ "vf_sobel", checkasm_check_vf_sobel },
#endif
#endif
#if CONFIG_SWSCALE
{ "sw_gbrp", checkasm_check_sw_gbrp },
{ "sw_range_convert", checkasm_check_sw_range_convert },
{ "sw_rgb", checkasm_check_sw_rgb },
{ "sw_scale", checkasm_check_sw_scale },
{ "sw_yuv2rgb", checkasm_check_sw_yuv2rgb },
{ "sw_yuv2yuv", checkasm_check_sw_yuv2yuv },
#endif
#if CONFIG_AVUTIL
{ "fixed_dsp", checkasm_check_fixed_dsp },
{ "float_dsp", checkasm_check_float_dsp },
{ "lls", checkasm_check_lls },
{ "av_tx", checkasm_check_av_tx },
#endif
{ NULL }
};
/* List of cpu flags to check */
static const struct {
const char *name;
const char *suffix;
int flag;
} cpus[] = {
#if ARCH_AARCH64
{ "ARMV8", "armv8", AV_CPU_FLAG_ARMV8 },
{ "NEON", "neon", AV_CPU_FLAG_NEON },
{ "DOTPROD", "dotprod", AV_CPU_FLAG_DOTPROD },
{ "I8MM", "i8mm", AV_CPU_FLAG_I8MM },
{ "SVE", "sve", AV_CPU_FLAG_SVE },
{ "SVE2", "sve2", AV_CPU_FLAG_SVE2 },
#elif ARCH_ARM
{ "ARMV5TE", "armv5te", AV_CPU_FLAG_ARMV5TE },
{ "ARMV6", "armv6", AV_CPU_FLAG_ARMV6 },
{ "ARMV6T2", "armv6t2", AV_CPU_FLAG_ARMV6T2 },
{ "VFP", "vfp", AV_CPU_FLAG_VFP },
{ "VFP_VM", "vfp_vm", AV_CPU_FLAG_VFP_VM },
{ "VFPV3", "vfp3", AV_CPU_FLAG_VFPV3 },
{ "NEON", "neon", AV_CPU_FLAG_NEON },
#elif ARCH_PPC
{ "ALTIVEC", "altivec", AV_CPU_FLAG_ALTIVEC },
{ "VSX", "vsx", AV_CPU_FLAG_VSX },
{ "POWER8", "power8", AV_CPU_FLAG_POWER8 },
#elif ARCH_RISCV
{ "RVI", "rvi", AV_CPU_FLAG_RVI },
{ "misaligned", "misaligned", AV_CPU_FLAG_RV_MISALIGNED },
{ "RV_zbb", "rvb_b", AV_CPU_FLAG_RVB_BASIC },
{ "RVB", "rvb", AV_CPU_FLAG_RVB },
{ "RV_zve32x","rvv_i32", AV_CPU_FLAG_RVV_I32 },
{ "RV_zve32f","rvv_f32", AV_CPU_FLAG_RVV_F32 },
{ "RV_zve64x","rvv_i64", AV_CPU_FLAG_RVV_I64 },
{ "RV_zve64d","rvv_f64", AV_CPU_FLAG_RVV_F64 },
{ "RV_zvbb", "rv_zvbb", AV_CPU_FLAG_RV_ZVBB },
#elif ARCH_MIPS
{ "MMI", "mmi", AV_CPU_FLAG_MMI },
{ "MSA", "msa", AV_CPU_FLAG_MSA },
#elif ARCH_X86
{ "MMX", "mmx", AV_CPU_FLAG_MMX|AV_CPU_FLAG_CMOV },
{ "MMXEXT", "mmxext", AV_CPU_FLAG_MMXEXT },
{ "3DNOW", "3dnow", AV_CPU_FLAG_3DNOW },
{ "3DNOWEXT", "3dnowext", AV_CPU_FLAG_3DNOWEXT },
{ "SSE", "sse", AV_CPU_FLAG_SSE },
{ "SSE2", "sse2", AV_CPU_FLAG_SSE2|AV_CPU_FLAG_SSE2SLOW },
{ "SSE3", "sse3", AV_CPU_FLAG_SSE3|AV_CPU_FLAG_SSE3SLOW },
{ "SSSE3", "ssse3", AV_CPU_FLAG_SSSE3|AV_CPU_FLAG_ATOM },
{ "SSE4.1", "sse4", AV_CPU_FLAG_SSE4 },
{ "SSE4.2", "sse42", AV_CPU_FLAG_SSE42 },
{ "AES-NI", "aesni", AV_CPU_FLAG_AESNI },
{ "AVX", "avx", AV_CPU_FLAG_AVX },
{ "XOP", "xop", AV_CPU_FLAG_XOP },
{ "FMA3", "fma3", AV_CPU_FLAG_FMA3 },
{ "FMA4", "fma4", AV_CPU_FLAG_FMA4 },
{ "AVX2", "avx2", AV_CPU_FLAG_AVX2 },
{ "AVX-512", "avx512", AV_CPU_FLAG_AVX512 },
{ "AVX-512ICL", "avx512icl", AV_CPU_FLAG_AVX512ICL },
#elif ARCH_LOONGARCH
{ "LSX", "lsx", AV_CPU_FLAG_LSX },
{ "LASX", "lasx", AV_CPU_FLAG_LASX },
#endif
{ NULL }
};
typedef struct CheckasmFuncVersion {
struct CheckasmFuncVersion *next;
void *func;
int ok;
int cpu;
CheckasmPerf perf;
} CheckasmFuncVersion;
/* Binary search tree node */
typedef struct CheckasmFunc {
struct CheckasmFunc *child[2];
CheckasmFuncVersion versions;
uint8_t color; /* 0 = red, 1 = black */
char name[1];
} CheckasmFunc;
/* Internal state */
static struct {
CheckasmFunc *funcs;
CheckasmFunc *current_func;
CheckasmFuncVersion *current_func_ver;
const char *current_test_name;
const char *bench_pattern;
int bench_pattern_len;
int num_checked;
int num_failed;
/* perf */
int nop_time;
int sysfd;
int cpu_flag;
const char *cpu_flag_name;
const char *test_pattern;
int verbose;
int csv;
int tsv;
volatile sig_atomic_t catch_signals;
} state;
/* PRNG state */
AVLFG checkasm_lfg;
/* float compare support code */
static int is_negative(union av_intfloat32 u)
{
return u.i >> 31;
}
int float_near_ulp(float a, float b, unsigned max_ulp)
{
union av_intfloat32 x, y;
x.f = a;
y.f = b;
if (is_negative(x) != is_negative(y)) {
// handle -0.0 == +0.0
return a == b;
}
if (llabs((int64_t)x.i - y.i) <= max_ulp)
return 1;
return 0;
}
int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
unsigned len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (!float_near_ulp(a[i], b[i], max_ulp))
return 0;
}
return 1;
}
int float_near_abs_eps(float a, float b, float eps)
{
float abs_diff = fabsf(a - b);
if (abs_diff < eps)
return 1;
fprintf(stderr, "test failed comparing %g with %g (abs diff=%g with EPS=%g)\n", a, b, abs_diff, eps);
return 0;
}
int float_near_abs_eps_array(const float *a, const float *b, float eps,
unsigned len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (!float_near_abs_eps(a[i], b[i], eps))
return 0;
}
return 1;
}
int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
{
return float_near_ulp(a, b, max_ulp) || float_near_abs_eps(a, b, eps);
}
int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
unsigned max_ulp, unsigned len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (!float_near_abs_eps_ulp(a[i], b[i], eps, max_ulp))
return 0;
}
return 1;
}
int double_near_abs_eps(double a, double b, double eps)
{
double abs_diff = fabs(a - b);
return abs_diff < eps;
}
int double_near_abs_eps_array(const double *a, const double *b, double eps,
unsigned len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (!double_near_abs_eps(a[i], b[i], eps))
return 0;
}
return 1;
}
/* Print colored text to stderr if the terminal supports it */
static void color_printf(int color, const char *fmt, ...)
{
static int use_color = -1;
va_list arg;
#if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
static HANDLE con;
static WORD org_attributes;
if (use_color < 0) {
CONSOLE_SCREEN_BUFFER_INFO con_info;
con = GetStdHandle(STD_ERROR_HANDLE);
if (con && con != INVALID_HANDLE_VALUE && GetConsoleScreenBufferInfo(con, &con_info)) {
org_attributes = con_info.wAttributes;
use_color = 1;
} else
use_color = 0;
}
if (use_color)
SetConsoleTextAttribute(con, (org_attributes & 0xfff0) | (color & 0x0f));
#else
if (use_color < 0) {
const char *term = getenv("TERM");
use_color = term && strcmp(term, "dumb") && isatty(2);
}
if (use_color)
fprintf(stderr, "\x1b[%d;3%dm", (color & 0x08) >> 3, color & 0x07);
#endif
va_start(arg, fmt);
vfprintf(stderr, fmt, arg);
va_end(arg);
if (use_color) {
#if HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
SetConsoleTextAttribute(con, org_attributes);
#else
fprintf(stderr, "\x1b[0m");
#endif
}
}
/* Deallocate a tree */
static void destroy_func_tree(CheckasmFunc *f)
{
if (f) {
CheckasmFuncVersion *v = f->versions.next;
while (v) {
CheckasmFuncVersion *next = v->next;
free(v);
v = next;
}
destroy_func_tree(f->child[0]);
destroy_func_tree(f->child[1]);
free(f);
}
}
/* Allocate a zero-initialized block, clean up and exit on failure */
static void *checkasm_malloc(size_t size)
{
void *ptr = calloc(1, size);
if (!ptr) {
fprintf(stderr, "checkasm: malloc failed\n");
destroy_func_tree(state.funcs);
exit(1);
}
return ptr;
}
/* Get the suffix of the specified cpu flag */
static const char *cpu_suffix(int cpu)
{
int i = FF_ARRAY_ELEMS(cpus);
while (--i >= 0)
if (cpu & cpus[i].flag)
return cpus[i].suffix;
return "c";
}
static int cmp_nop(const void *a, const void *b)
{
return *(const uint16_t*)a - *(const uint16_t*)b;
}
/* Measure the overhead of the timing code (in decicycles) */
static int measure_nop_time(void)
{
uint16_t nops[10000];
int i, nop_sum = 0;
av_unused const int sysfd = state.sysfd;
uint64_t t = 0;
for (i = 0; i < 10000; i++) {
PERF_START(t);
PERF_STOP(t);
nops[i] = t;
}
qsort(nops, 10000, sizeof(uint16_t), cmp_nop);
for (i = 2500; i < 7500; i++)
nop_sum += nops[i];
return nop_sum / 500;
}
static inline double avg_cycles_per_call(const CheckasmPerf *const p)
{
if (p->iterations) {
const double cycles = (double)(10 * p->cycles) / p->iterations - state.nop_time;
if (cycles > 0.0)
return cycles / 4.0; /* 4 calls per iteration */
}
return 0.0;
}
/* Print benchmark results */
static void print_benchs(CheckasmFunc *f)
{
if (f) {
print_benchs(f->child[0]);
/* Only print functions with at least one assembly version */
if (f->versions.cpu || f->versions.next) {
CheckasmFuncVersion *v = &f->versions;
const CheckasmPerf *p = &v->perf;
const double baseline = avg_cycles_per_call(p);
double decicycles;
do {
if (p->iterations) {
p = &v->perf;
decicycles = avg_cycles_per_call(p);
if (state.csv || state.tsv) {
const char sep = state.csv ? ',' : '\t';
printf("%s%c%s%c%.1f\n", f->name, sep,
cpu_suffix(v->cpu), sep,
decicycles / 10.0);
} else {
const int pad_length = 10 + 50 -
printf("%s_%s:", f->name, cpu_suffix(v->cpu));
const double ratio = decicycles ?
baseline / decicycles : 0.0;
printf("%*.1f (%5.2fx)\n", FFMAX(pad_length, 0),
decicycles / 10.0, ratio);
}
}
} while ((v = v->next));
}
print_benchs(f->child[1]);
}
}
/* ASCIIbetical sort except preserving natural order for numbers */
static int cmp_func_names(const char *a, const char *b)
{
const char *start = a;
int ascii_diff, digit_diff;
for (; !(ascii_diff = *(const unsigned char*)a - *(const unsigned char*)b) && *a; a++, b++);
for (; av_isdigit(*a) && av_isdigit(*b); a++, b++);
if (a > start && av_isdigit(a[-1]) && (digit_diff = av_isdigit(*a) - av_isdigit(*b)))
return digit_diff;
return ascii_diff;
}
/* Perform a tree rotation in the specified direction and return the new root */
static CheckasmFunc *rotate_tree(CheckasmFunc *f, int dir)
{
CheckasmFunc *r = f->child[dir^1];
f->child[dir^1] = r->child[dir];
r->child[dir] = f;
r->color = f->color;
f->color = 0;
return r;
}
#define is_red(f) ((f) && !(f)->color)
/* Balance a left-leaning red-black tree at the specified node */
static void balance_tree(CheckasmFunc **root)
{
CheckasmFunc *f = *root;
if (is_red(f->child[0]) && is_red(f->child[1])) {
f->color ^= 1;
f->child[0]->color = f->child[1]->color = 1;
}
if (!is_red(f->child[0]) && is_red(f->child[1]))
*root = rotate_tree(f, 0); /* Rotate left */
else if (is_red(f->child[0]) && is_red(f->child[0]->child[0]))
*root = rotate_tree(f, 1); /* Rotate right */
}
/* Get a node with the specified name, creating it if it doesn't exist */
static CheckasmFunc *get_func(CheckasmFunc **root, const char *name)
{
CheckasmFunc *f = *root;
if (f) {
/* Search the tree for a matching node */
int cmp = cmp_func_names(name, f->name);
if (cmp) {
f = get_func(&f->child[cmp > 0], name);
/* Rebalance the tree on the way up if a new node was inserted */
if (!f->versions.func)
balance_tree(root);
}
} else {
/* Allocate and insert a new node into the tree */
int name_length = strlen(name);
f = *root = checkasm_malloc(sizeof(CheckasmFunc) + name_length);
memcpy(f->name, name, name_length + 1);
}
return f;
}
checkasm_context checkasm_context_buf;
/* Crash handling: attempt to catch crashes and handle them
* gracefully instead of just aborting abruptly. */
#ifdef _WIN32
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
static LONG NTAPI signal_handler(EXCEPTION_POINTERS *e) {
int s;
if (!state.catch_signals)
return EXCEPTION_CONTINUE_SEARCH;
switch (e->ExceptionRecord->ExceptionCode) {
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_INT_DIVIDE_BY_ZERO:
s = SIGFPE;
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
case EXCEPTION_PRIV_INSTRUCTION:
s = SIGILL;
break;
case EXCEPTION_ACCESS_VIOLATION:
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
case EXCEPTION_DATATYPE_MISALIGNMENT:
case EXCEPTION_STACK_OVERFLOW:
s = SIGSEGV;
break;
case EXCEPTION_IN_PAGE_ERROR:
s = SIGBUS;
break;
default:
return EXCEPTION_CONTINUE_SEARCH;
}
state.catch_signals = 0;
checkasm_load_context(s);
return EXCEPTION_CONTINUE_EXECUTION; /* never reached, but shuts up gcc */
}
#endif
#else
static void signal_handler(int s);
static const struct sigaction signal_handler_act = {
.sa_handler = signal_handler,
.sa_flags = SA_RESETHAND,
};
static void signal_handler(int s) {
if (state.catch_signals) {
state.catch_signals = 0;
sigaction(s, &signal_handler_act, NULL);
checkasm_load_context(s);
}
}
#endif
/* Compares a string with a wildcard pattern. */
static int wildstrcmp(const char *str, const char *pattern)
{
const char *wild = strchr(pattern, '*');
if (wild) {
const size_t len = wild - pattern;
if (strncmp(str, pattern, len)) return 1;
while (*++wild == '*');
if (!*wild) return 0;
str += len;
while (*str && wildstrcmp(str, wild)) str++;
return !*str;
}
return strcmp(str, pattern);
}
/* Perform tests and benchmarks for the specified cpu flag if supported by the host */
static void check_cpu_flag(const char *name, int flag)
{
int old_cpu_flag = state.cpu_flag;
flag |= old_cpu_flag;
av_force_cpu_flags(-1);
state.cpu_flag = flag & av_get_cpu_flags();
av_force_cpu_flags(state.cpu_flag);
if (!flag || state.cpu_flag != old_cpu_flag) {
int i;
state.cpu_flag_name = name;
for (i = 0; tests[i].func; i++) {
if (state.test_pattern && wildstrcmp(tests[i].name, state.test_pattern))
continue;
state.current_test_name = tests[i].name;
tests[i].func();
}
}
}
/* Print the name of the current CPU flag, but only do it once */
static void print_cpu_name(void)
{
if (state.cpu_flag_name) {
color_printf(COLOR_YELLOW, "%s:\n", state.cpu_flag_name);
state.cpu_flag_name = NULL;
}
}
#if CONFIG_LINUX_PERF
static int bench_init_linux(void)
{
struct perf_event_attr attr = {
.type = PERF_TYPE_HARDWARE,
.size = sizeof(struct perf_event_attr),
.config = PERF_COUNT_HW_CPU_CYCLES,
.disabled = 1, // start counting only on demand
.exclude_kernel = 1,
.exclude_hv = 1,
#if !ARCH_X86
.exclude_guest = 1,
#endif
};
fprintf(stderr, "benchmarking with Linux Perf Monitoring API\n");
state.sysfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0);
if (state.sysfd == -1) {
perror("perf_event_open");
return -1;
}
return 0;
}
#elif CONFIG_MACOS_KPERF
static int bench_init_kperf(void)
{
ff_kperf_init();
return 0;
}
#else
static int bench_init_ffmpeg(void)
{
#ifdef AV_READ_TIME
if (!checkasm_save_context()) {
checkasm_set_signal_handler_state(1);
AV_READ_TIME();
checkasm_set_signal_handler_state(0);
} else {
fprintf(stderr, "checkasm: unable to execute platform specific timer\n");
return -1;
}
fprintf(stderr, "benchmarking with native FFmpeg timers\n");
return 0;
#else
fprintf(stderr, "checkasm: --bench is not supported on your system\n");
return -1;
#endif
}
#endif
static int bench_init(void)
{
#if CONFIG_LINUX_PERF
int ret = bench_init_linux();
#elif CONFIG_MACOS_KPERF
int ret = bench_init_kperf();
#else
int ret = bench_init_ffmpeg();
#endif
if (ret < 0)
return ret;
state.nop_time = measure_nop_time();
fprintf(stderr, "nop: %d.%d\n", state.nop_time/10, state.nop_time%10);
return 0;
}
static void bench_uninit(void)
{
#if CONFIG_LINUX_PERF
close(state.sysfd);
#endif
}
static int usage(const char *path)
{
fprintf(stderr,
"Usage: %s [options...] [seed]\n"
" --test=<pattern> Run specific test.\n"
" --bench Run benchmark.\n"
" --csv, --tsv Output results in rows of comma or tab separated values.\n"
" --runs=<ptwo> Manual number of benchmark iterations to run 2**<ptwo>.\n"
" --verbose Increase verbosity.\n",
path);
return 1;
}
int main(int argc, char *argv[])
{
unsigned int seed = av_get_random_seed();
int i, ret = 0;
char arch_info_buf[50] = "";
#ifdef _WIN32
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
AddVectoredExceptionHandler(0, signal_handler);
#endif
#else
sigaction(SIGBUS, &signal_handler_act, NULL);
sigaction(SIGFPE, &signal_handler_act, NULL);
sigaction(SIGILL, &signal_handler_act, NULL);
sigaction(SIGSEGV, &signal_handler_act, NULL);
#endif
#if HAVE_PRCTL && defined(PR_SET_UNALIGN)
prctl(PR_SET_UNALIGN, PR_UNALIGN_SIGBUS);
#endif
#if ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
if (have_vfp(av_get_cpu_flags()) || have_neon(av_get_cpu_flags()))
checkasm_checked_call = checkasm_checked_call_vfp;
#endif
if (!tests[0].func || !cpus[0].flag) {
fprintf(stderr, "checkasm: no tests to perform\n");
return 0;
}
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
unsigned long l;
char *end;
if (!strncmp(arg, "--bench", 7)) {
if (bench_init() < 0)
return 1;
if (arg[7] == '=') {
state.bench_pattern = arg + 8;
state.bench_pattern_len = strlen(state.bench_pattern);
} else
state.bench_pattern = "*";
} else if (!strncmp(arg, "--test=", 7)) {
state.test_pattern = arg + 7;
} else if (!strcmp(arg, "--csv")) {
state.csv = 1; state.tsv = 0;
} else if (!strcmp(arg, "--tsv")) {
state.csv = 0; state.tsv = 1;
} else if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
state.verbose = 1;
} else if (!strncmp(arg, "--runs=", 7)) {
l = strtoul(arg + 7, &end, 10);
if (*end == '\0') {
if (l > 30) {
fprintf(stderr, "checkasm: error: runs exponent must be within the range 0 <= 30\n");
usage(argv[0]);
}
bench_runs = 1U << l;
} else {
return usage(argv[0]);
}
} else if ((l = strtoul(arg, &end, 10)) <= UINT_MAX &&
*end == '\0') {
seed = l;
} else {
return usage(argv[0]);
}
}
#if ARCH_AARCH64 && HAVE_SVE
if (have_sve(av_get_cpu_flags()))
snprintf(arch_info_buf, sizeof(arch_info_buf),
"SVE %d bits, ", 8 * ff_aarch64_sve_length());
#endif
fprintf(stderr, "checkasm: %susing random seed %u\n", arch_info_buf, seed);
av_lfg_init(&checkasm_lfg, seed);
if (state.bench_pattern)
fprintf(stderr, "checkasm: bench runs %" PRIu64 " (1 << %i)\n", bench_runs, av_log2(bench_runs));
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);
if (state.bench_pattern) {
print_benchs(state.funcs);
}
}
destroy_func_tree(state.funcs);
bench_uninit();
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 &&
!wildstrcmp(state.current_func->name, state.bench_pattern);
}
/* Indicate that the current test has failed */
void checkasm_fail_func(const char *msg, ...)
{
if (state.current_func_ver && 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++;
}
}
void checkasm_set_signal_handler_state(int enabled) {
state.catch_signals = enabled;
}
int checkasm_handle_signal(int s) {
if (s) {
#ifdef __GLIBC__
checkasm_fail_func("fatal signal %d: %s", s, strsignal(s));
#else
checkasm_fail_func(s == SIGFPE ? "fatal arithmetic error" :
s == SIGILL ? "illegal instruction" :
s == SIGBUS ? "bus error" :
"segmentation fault");
#endif
}
return s;
}
/* Get the benchmark context of the current function */
CheckasmPerf *checkasm_get_perf_context(void)
{
CheckasmPerf *perf = &state.current_func_ver->perf;
memset(perf, 0, sizeof(*perf));
perf->sysfd = state.sysfd;
return perf;
}
/* 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;
}
}
#define DEF_CHECKASM_CHECK_FUNC(type, fmt) \
int checkasm_check_##type(const char *file, int line, \
const type *buf1, ptrdiff_t stride1, \
const type *buf2, ptrdiff_t stride2, \
int w, int h, const char *name) \
{ \
int y = 0; \
stride1 /= sizeof(*buf1); \
stride2 /= sizeof(*buf2); \
for (y = 0; y < h; y++) \
if (memcmp(&buf1[y*stride1], &buf2[y*stride2], w*sizeof(*buf1))) \
break; \
if (y == h) \
return 0; \
checkasm_fail_func("%s:%d", file, line); \
if (!state.verbose) \
return 1; \
fprintf(stderr, "%s:\n", name); \
while (h--) { \
for (int x = 0; x < w; x++) \
fprintf(stderr, " " fmt, buf1[x]); \
fprintf(stderr, " "); \
for (int x = 0; x < w; x++) \
fprintf(stderr, " " fmt, buf2[x]); \
fprintf(stderr, " "); \
for (int x = 0; x < w; x++) \
fprintf(stderr, "%c", buf1[x] != buf2[x] ? 'x' : '.'); \
buf1 += stride1; \
buf2 += stride2; \
fprintf(stderr, "\n"); \
} \
return 1; \
}
DEF_CHECKASM_CHECK_FUNC(uint8_t, "%02x")
DEF_CHECKASM_CHECK_FUNC(uint16_t, "%04x")
DEF_CHECKASM_CHECK_FUNC(uint32_t, "%08x")
DEF_CHECKASM_CHECK_FUNC(int16_t, "%6d")
DEF_CHECKASM_CHECK_FUNC(int32_t, "%9d")
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