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152 lines
3.5 KiB
152 lines
3.5 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/cpu.h" |
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#include "libavutil/cpu_internal.h" |
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#include "config.h" |
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#if (defined(__linux__) || defined(__ANDROID__)) && HAVE_GETAUXVAL |
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#include <stdint.h> |
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#include <sys/auxv.h> |
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#define HWCAP_AARCH64_ASIMDDP (1 << 20) |
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#define HWCAP2_AARCH64_I8MM (1 << 13) |
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static int detect_flags(void) |
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{ |
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int flags = 0; |
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unsigned long hwcap = getauxval(AT_HWCAP); |
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unsigned long hwcap2 = getauxval(AT_HWCAP2); |
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if (hwcap & HWCAP_AARCH64_ASIMDDP) |
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flags |= AV_CPU_FLAG_DOTPROD; |
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if (hwcap2 & HWCAP2_AARCH64_I8MM) |
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flags |= AV_CPU_FLAG_I8MM; |
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return flags; |
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} |
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#elif defined(__APPLE__) && HAVE_SYSCTLBYNAME |
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#include <sys/sysctl.h> |
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static int have_feature(const char *feature) { |
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uint32_t value = 0; |
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size_t size = sizeof(value); |
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if (!sysctlbyname(feature, &value, &size, NULL, 0)) |
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return value; |
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return 0; |
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} |
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static int detect_flags(void) |
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{ |
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int flags = 0; |
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if (have_feature("hw.optional.arm.FEAT_DotProd")) |
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flags |= AV_CPU_FLAG_DOTPROD; |
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if (have_feature("hw.optional.arm.FEAT_I8MM")) |
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flags |= AV_CPU_FLAG_I8MM; |
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return flags; |
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} |
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#elif defined(__OpenBSD__) |
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#include <machine/armreg.h> |
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#include <machine/cpu.h> |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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static int detect_flags(void) |
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{ |
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int flags = 0; |
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#ifdef CPU_ID_AA64ISAR0 |
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int mib[2]; |
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uint64_t isar0; |
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uint64_t isar1; |
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size_t len; |
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mib[0] = CTL_MACHDEP; |
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mib[1] = CPU_ID_AA64ISAR0; |
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len = sizeof(isar0); |
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if (sysctl(mib, 2, &isar0, &len, NULL, 0) != -1) { |
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if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL) |
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flags |= AV_CPU_FLAG_DOTPROD; |
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} |
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mib[0] = CTL_MACHDEP; |
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mib[1] = CPU_ID_AA64ISAR1; |
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len = sizeof(isar1); |
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if (sysctl(mib, 2, &isar1, &len, NULL, 0) != -1) { |
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#ifdef ID_AA64ISAR1_I8MM_IMPL |
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if (ID_AA64ISAR1_I8MM(isar1) >= ID_AA64ISAR1_I8MM_IMPL) |
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flags |= AV_CPU_FLAG_I8MM; |
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#endif |
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} |
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#endif |
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return flags; |
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} |
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#elif defined(_WIN32) |
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#include <windows.h> |
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static int detect_flags(void) |
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{ |
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int flags = 0; |
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#ifdef PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE |
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if (IsProcessorFeaturePresent(PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE)) |
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flags |= AV_CPU_FLAG_DOTPROD; |
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#endif |
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return flags; |
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} |
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#else |
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static int detect_flags(void) |
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{ |
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return 0; |
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} |
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#endif |
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int ff_get_cpu_flags_aarch64(void) |
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{ |
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int flags = AV_CPU_FLAG_ARMV8 * HAVE_ARMV8 | |
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AV_CPU_FLAG_NEON * HAVE_NEON; |
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#ifdef __ARM_FEATURE_DOTPROD |
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flags |= AV_CPU_FLAG_DOTPROD; |
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#endif |
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#ifdef __ARM_FEATURE_MATMUL_INT8 |
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flags |= AV_CPU_FLAG_I8MM; |
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#endif |
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flags |= detect_flags(); |
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return flags; |
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} |
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size_t ff_get_cpu_max_align_aarch64(void) |
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{ |
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int flags = av_get_cpu_flags(); |
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if (flags & AV_CPU_FLAG_NEON) |
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return 16; |
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return 8; |
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}
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