mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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
|
|
*/
|
|
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/cpu_internal.h"
|
|
#include "config.h"
|
|
|
|
#if (defined(__linux__) || defined(__ANDROID__)) && HAVE_GETAUXVAL
|
|
#include <stdint.h>
|
|
#include <sys/auxv.h>
|
|
|
|
#define HWCAP_AARCH64_ASIMDDP (1 << 20)
|
|
#define HWCAP2_AARCH64_I8MM (1 << 13)
|
|
|
|
static int detect_flags(void)
|
|
{
|
|
int flags = 0;
|
|
|
|
unsigned long hwcap = getauxval(AT_HWCAP);
|
|
unsigned long hwcap2 = getauxval(AT_HWCAP2);
|
|
|
|
if (hwcap & HWCAP_AARCH64_ASIMDDP)
|
|
flags |= AV_CPU_FLAG_DOTPROD;
|
|
if (hwcap2 & HWCAP2_AARCH64_I8MM)
|
|
flags |= AV_CPU_FLAG_I8MM;
|
|
|
|
return flags;
|
|
}
|
|
|
|
#elif defined(__APPLE__) && HAVE_SYSCTLBYNAME
|
|
#include <sys/sysctl.h>
|
|
|
|
static int have_feature(const char *feature) {
|
|
uint32_t value = 0;
|
|
size_t size = sizeof(value);
|
|
if (!sysctlbyname(feature, &value, &size, NULL, 0))
|
|
return value;
|
|
return 0;
|
|
}
|
|
|
|
static int detect_flags(void)
|
|
{
|
|
int flags = 0;
|
|
|
|
if (have_feature("hw.optional.arm.FEAT_DotProd"))
|
|
flags |= AV_CPU_FLAG_DOTPROD;
|
|
if (have_feature("hw.optional.arm.FEAT_I8MM"))
|
|
flags |= AV_CPU_FLAG_I8MM;
|
|
|
|
return flags;
|
|
}
|
|
|
|
#elif defined(__OpenBSD__)
|
|
#include <machine/armreg.h>
|
|
#include <machine/cpu.h>
|
|
#include <sys/types.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
static int detect_flags(void)
|
|
{
|
|
int flags = 0;
|
|
|
|
#ifdef CPU_ID_AA64ISAR0
|
|
int mib[2];
|
|
uint64_t isar0;
|
|
uint64_t isar1;
|
|
size_t len;
|
|
|
|
mib[0] = CTL_MACHDEP;
|
|
mib[1] = CPU_ID_AA64ISAR0;
|
|
len = sizeof(isar0);
|
|
if (sysctl(mib, 2, &isar0, &len, NULL, 0) != -1) {
|
|
if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
|
|
flags |= AV_CPU_FLAG_DOTPROD;
|
|
}
|
|
|
|
mib[0] = CTL_MACHDEP;
|
|
mib[1] = CPU_ID_AA64ISAR1;
|
|
len = sizeof(isar1);
|
|
if (sysctl(mib, 2, &isar1, &len, NULL, 0) != -1) {
|
|
#ifdef ID_AA64ISAR1_I8MM_IMPL
|
|
if (ID_AA64ISAR1_I8MM(isar1) >= ID_AA64ISAR1_I8MM_IMPL)
|
|
flags |= AV_CPU_FLAG_I8MM;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
return flags;
|
|
}
|
|
|
|
#elif defined(_WIN32)
|
|
#include <windows.h>
|
|
|
|
static int detect_flags(void)
|
|
{
|
|
int flags = 0;
|
|
#ifdef PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE
|
|
if (IsProcessorFeaturePresent(PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE))
|
|
flags |= AV_CPU_FLAG_DOTPROD;
|
|
#endif
|
|
return flags;
|
|
}
|
|
#else
|
|
|
|
static int detect_flags(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
int ff_get_cpu_flags_aarch64(void)
|
|
{
|
|
int flags = AV_CPU_FLAG_ARMV8 * HAVE_ARMV8 |
|
|
AV_CPU_FLAG_NEON * HAVE_NEON;
|
|
|
|
#ifdef __ARM_FEATURE_DOTPROD
|
|
flags |= AV_CPU_FLAG_DOTPROD;
|
|
#endif
|
|
#ifdef __ARM_FEATURE_MATMUL_INT8
|
|
flags |= AV_CPU_FLAG_I8MM;
|
|
#endif
|
|
|
|
flags |= detect_flags();
|
|
|
|
return flags;
|
|
}
|
|
|
|
size_t ff_get_cpu_max_align_aarch64(void)
|
|
{
|
|
int flags = av_get_cpu_flags();
|
|
|
|
if (flags & AV_CPU_FLAG_NEON)
|
|
return 16;
|
|
|
|
return 8;
|
|
}
|