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Arm64: Cpu feature detection (#4264)

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* Arm64: Cpu feature detection

* Ptc: Add Arm64 feature info

* nits

* simplify CheckSysctlName

* restore some macos flags

* feedback
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merry 2023-01-12 07:05:18 +00:00 • committed by GitHub
parent fd36c8deca
commit a11784fcbf
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4 changed files with 237 additions and 31 deletions
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185
ARMeilleure/CodeGen/Arm64/HardwareCapabilities.cs Normal file
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using System;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics.Arm;
using System.Runtime.Versioning;
namespace ARMeilleure.CodeGen.Arm64
{
static partial class HardwareCapabilities
{
static HardwareCapabilities()
{
if (!ArmBase.Arm64.IsSupported)
{
return;
}
if (OperatingSystem.IsLinux())
{
LinuxFeatureInfoHwCap = (LinuxFeatureFlagsHwCap)getauxval(AT_HWCAP);
LinuxFeatureInfoHwCap2 = (LinuxFeatureFlagsHwCap2)getauxval(AT_HWCAP2);
}
if (OperatingSystem.IsMacOS())
{
for (int i = 0; i < _sysctlNames.Length; i++)
{
if (CheckSysctlName(_sysctlNames[i]))
{
MacOsFeatureInfo |= (MacOsFeatureFlags)(1 << i);
}
}
}
}
#region Linux
private const ulong AT_HWCAP = 16;
private const ulong AT_HWCAP2 = 26;
[LibraryImport("libc", SetLastError = true)]
private static partial ulong getauxval(ulong type);
[Flags]
public enum LinuxFeatureFlagsHwCap : ulong
{
Fp = 1 << 0,
Asimd = 1 << 1,
Evtstrm = 1 << 2,
Aes = 1 << 3,
Pmull = 1 << 4,
Sha1 = 1 << 5,
Sha2 = 1 << 6,
Crc32 = 1 << 7,
Atomics = 1 << 8,
FpHp = 1 << 9,
AsimdHp = 1 << 10,
CpuId = 1 << 11,
AsimdRdm = 1 << 12,
Jscvt = 1 << 13,
Fcma = 1 << 14,
Lrcpc = 1 << 15,
DcpOp = 1 << 16,
Sha3 = 1 << 17,
Sm3 = 1 << 18,
Sm4 = 1 << 19,
AsimdDp = 1 << 20,
Sha512 = 1 << 21,
Sve = 1 << 22,
AsimdFhm = 1 << 23,
Dit = 1 << 24,
Uscat = 1 << 25,
Ilrcpc = 1 << 26,
FlagM = 1 << 27,
Ssbs = 1 << 28,
Sb = 1 << 29,
Paca = 1 << 30,
Pacg = 1UL << 31
}
[Flags]
public enum LinuxFeatureFlagsHwCap2 : ulong
{
Dcpodp = 1 << 0,
Sve2 = 1 << 1,
SveAes = 1 << 2,
SvePmull = 1 << 3,
SveBitperm = 1 << 4,
SveSha3 = 1 << 5,
SveSm4 = 1 << 6,
FlagM2 = 1 << 7,
Frint = 1 << 8,
SveI8mm = 1 << 9,
SveF32mm = 1 << 10,
SveF64mm = 1 << 11,
SveBf16 = 1 << 12,
I8mm = 1 << 13,
Bf16 = 1 << 14,
Dgh = 1 << 15,
Rng = 1 << 16,
Bti = 1 << 17,
Mte = 1 << 18,
Ecv = 1 << 19,
Afp = 1 << 20,
Rpres = 1 << 21,
Mte3 = 1 << 22,
Sme = 1 << 23,
Sme_i16i64 = 1 << 24,
Sme_f64f64 = 1 << 25,
Sme_i8i32 = 1 << 26,
Sme_f16f32 = 1 << 27,
Sme_b16f32 = 1 << 28,
Sme_f32f32 = 1 << 29,
Sme_fa64 = 1 << 30,
Wfxt = 1UL << 31,
Ebf16 = 1UL << 32,
Sve_Ebf16 = 1UL << 33,
Cssc = 1UL << 34,
Rprfm = 1UL << 35,
Sve2p1 = 1UL << 36
}
public static LinuxFeatureFlagsHwCap LinuxFeatureInfoHwCap { get; } = 0;
public static LinuxFeatureFlagsHwCap2 LinuxFeatureInfoHwCap2 { get; } = 0;
#endregion
#region macOS
[LibraryImport("libSystem.dylib", SetLastError = true)]
private static unsafe partial int sysctlbyname([MarshalAs(UnmanagedType.LPStr)] string name, out int oldValue, ref ulong oldSize, IntPtr newValue, ulong newValueSize);
[SupportedOSPlatform("macos")]
private static bool CheckSysctlName(string name)
{
ulong size = sizeof(int);
if (sysctlbyname(name, out int val, ref size, IntPtr.Zero, 0) == 0 && size == sizeof(int))
{
return val != 0;
}
return false;
}
private static string[] _sysctlNames = new string[]
{
"hw.optional.floatingpoint",
"hw.optional.AdvSIMD",
"hw.optional.arm.FEAT_FP16",
"hw.optional.arm.FEAT_AES",
"hw.optional.arm.FEAT_PMULL",
"hw.optional.arm.FEAT_LSE",
"hw.optional.armv8_crc32",
"hw.optional.arm.FEAT_SHA1",
"hw.optional.arm.FEAT_SHA256"
};
[Flags]
public enum MacOsFeatureFlags
{
Fp = 1 << 0,
AdvSimd = 1 << 1,
Fp16 = 1 << 2,
Aes = 1 << 3,
Pmull = 1 << 4,
Lse = 1 << 5,
Crc32 = 1 << 6,
Sha1 = 1 << 7,
Sha256 = 1 << 8
}
public static MacOsFeatureFlags MacOsFeatureInfo { get; } = 0;
#endregion
public static bool SupportsAdvSimd => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Asimd) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.AdvSimd);
public static bool SupportsAes => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Aes) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Aes);
public static bool SupportsPmull => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Pmull) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Pmull);
public static bool SupportsLse => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Atomics) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Lse);
public static bool SupportsCrc32 => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Crc32) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Crc32);
public static bool SupportsSha1 => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Sha1) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Sha1);
public static bool SupportsSha256 => LinuxFeatureInfoHwCap.HasFlag(LinuxFeatureFlagsHwCap.Sha2) || MacOsFeatureInfo.HasFlag(MacOsFeatureFlags.Sha256);
}
}