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ARMeilleure: Add initial support for AVX512(EVEX encoding) (#3663)

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* ARMeilleure: Add AVX512{F,VL,DQ,BW} detection

Add `UseAvx512Ortho` and `UseAvx512OrthoFloat` optimization flags as
short-hands for `F+VL` and `F+VL+DQ`.

* ARMeilleure: Add initial support for EVEX instruction encoding

Does not implement rounding, or exception controls.

* ARMeilleure: Add `X86Vpternlogd`

Accelerates the vector-`Not` instruction.

* ARMeilleure: Add check for `OSXSAVE` for AVX{2,512}

* ARMeilleure: Add check for `XCR0` flags

Add XCR0 register checks for AVX and AVX512F, following the guidelines
from section 14.3 and 15.2 from the Intel Architecture Software
Developer's Manual.

* ARMeilleure: Increment InternalVersion

* ARMeilleure: Remove redundant `ReProtect` and `Dispose`, formatting

* ARMeilleure: Move XCR0 procedure to GetXcr0Eax

* ARMeilleure: Add `XCR0` to `FeatureInfo` structure

* ARMeilleure: Utilize `ReadOnlySpan` for Xcr0 assembly

Avoids an additional allocation

* ARMeilleure: Formatting fixes
This commit is contained in:
Wunk 2022-12-18 11:46:13 -08:00 • committed by GitHub
parent d7310d7a1c
commit 295fbd0542
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10 changed files with 193 additions and 9 deletions
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105
ARMeilleure/CodeGen/X86/Assembler.cs
View file

@ -1033,7 +1033,13 @@ namespace ARMeilleure.CodeGen.X86
Debug.Assert(opCode != BadOp, "Invalid opcode value.");
if ((flags & InstructionFlags.Vex) != 0 && HardwareCapabilities.SupportsVexEncoding)
if ((flags & InstructionFlags.Evex) != 0 && HardwareCapabilities.SupportsEvexEncoding)
{
WriteEvexInst(dest, src1, src2, type, flags, opCode);
opCode &= 0xff;
}
else if ((flags & InstructionFlags.Vex) != 0 && HardwareCapabilities.SupportsVexEncoding)
{
// In a vex encoding, only one prefix can be active at a time. The active prefix is encoded in the second byte using two bits.
@ -1152,6 +1158,103 @@ namespace ARMeilleure.CodeGen.X86
}
}
private void WriteEvexInst(
Operand dest,
Operand src1,
Operand src2,
OperandType type,
InstructionFlags flags,
int opCode,
bool broadcast = false,
int registerWidth = 128,
int maskRegisterIdx = 0,
bool zeroElements = false)
{
int destIdx = dest.GetRegister().Index;
int src1Idx = src1.GetRegister().Index;
int src2Idx = src2.GetRegister().Index;
WriteByte(0x62);
// P0
// Extend dest register
bool r = (destIdx & 8) == 0;
// Extend src register
bool x = (src1Idx & 16) == 0;
// Extend src register
bool b = (src1Idx & 8) == 0;
// Extend dest register
bool rp = (destIdx & 16) == 0;
// Escape code index
byte mm = 0b00;
switch ((ushort)(opCode >> 8))
{
case 0xf00: mm = 0b01; break;
case 0xf38: mm = 0b10; break;
case 0xf3a: mm = 0b11; break;
default: Debug.Assert(false, $"Failed to EVEX encode opcode 0x{opCode:X}."); break;
}
WriteByte(
(byte)(
(r ? 0x80 : 0) |
(x ? 0x40 : 0) |
(b ? 0x20 : 0) |
(rp ? 0x10 : 0) |
mm));
// P1
// Specify 64-bit lane mode
bool w = Is64Bits(type);
// Src2 register index
byte vvvv = (byte)(src2Idx & 0b1111);
// Opcode prefix
byte pp = (flags & InstructionFlags.PrefixMask) switch
{
InstructionFlags.Prefix66 => 0b01,
InstructionFlags.PrefixF3 => 0b10,
InstructionFlags.PrefixF2 => 0b11,
_ => 0
};
WriteByte(
(byte)(
(w ? 0x80 : 0) |
(vvvv << 3) |
0b100 |
pp));
// P2
// Mask register determines what elements to zero, rather than what elements to merge
bool z = zeroElements;
// Specifies register-width
byte ll = 0b00;
switch (registerWidth)
{
case 128: ll = 0b00; break;
case 256: ll = 0b01; break;
case 512: ll = 0b10; break;
default: Debug.Assert(false, $"Invalid EVEX vector register width {registerWidth}."); break;
}
// Embedded broadcast in the case of a memory operand
bool bcast = broadcast;
// Extend src2 register
bool vp = (src2Idx & 16) == 0;
// Mask register index
Debug.Assert(maskRegisterIdx < 8, $"Invalid mask register index {maskRegisterIdx}.");
byte aaa = (byte)(maskRegisterIdx & 0b111);
WriteByte(
(byte)(
(z ? 0x80 : 0) |
(ll << 5) |
(bcast ? 0x10 : 0) |
(vp ? 8 : 0) |
aaa));
}
private void WriteCompactInst(Operand operand, int opCode)
{
int regIndex = operand.GetRegister().Index;

2
ARMeilleure/CodeGen/X86/AssemblerTable.cs
View file

@ -20,6 +20,7 @@ namespace ARMeilleure.CodeGen.X86
Reg8Dest = 1 << 2,
RexW = 1 << 3,
Vex = 1 << 4,
Evex = 1 << 5,
PrefixBit = 16,
PrefixMask = 7 << PrefixBit,
@ -278,6 +279,7 @@ namespace ARMeilleure.CodeGen.X86
Add(X86Instruction.Vfnmsub231sd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f38bf, InstructionFlags.Vex | InstructionFlags.Prefix66 | InstructionFlags.RexW));
Add(X86Instruction.Vfnmsub231ss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f38bf, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Vpblendvb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a4c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Vpternlogd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a25, InstructionFlags.Evex | InstructionFlags.Prefix66));
Add(X86Instruction.Xor, new InstructionInfo(0x00000031, 0x06000083, 0x06000081, BadOp, 0x00000033, InstructionFlags.None));
Add(X86Instruction.Xorpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f57, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Xorps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f57, InstructionFlags.Vex));

52
ARMeilleure/CodeGen/X86/HardwareCapabilities.cs
View file

@ -1,10 +1,14 @@
using Ryujinx.Memory;
using System;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics.X86;
namespace ARMeilleure.CodeGen.X86
{
static class HardwareCapabilities
{
private delegate uint GetXcr0();
static HardwareCapabilities()
{
if (!X86Base.IsSupported)
@ -24,6 +28,28 @@ namespace ARMeilleure.CodeGen.X86
FeatureInfo7Ebx = (FeatureFlags7Ebx)ebx7;
FeatureInfo7Ecx = (FeatureFlags7Ecx)ecx7;
}
Xcr0InfoEax = (Xcr0FlagsEax)GetXcr0Eax();
}
private static uint GetXcr0Eax()
{
ReadOnlySpan<byte> asmGetXcr0 = new byte[]
{
0x31, 0xc9, // xor ecx, ecx
0xf, 0x01, 0xd0, // xgetbv
0xc3, // ret
};
using MemoryBlock memGetXcr0 = new MemoryBlock((ulong)asmGetXcr0.Length);
memGetXcr0.Write(0, asmGetXcr0);
memGetXcr0.Reprotect(0, (ulong)asmGetXcr0.Length, MemoryPermission.ReadAndExecute);
var fGetXcr0 = Marshal.GetDelegateForFunctionPointer<GetXcr0>(memGetXcr0.Pointer);
return fGetXcr0();
}
[Flags]
@ -44,6 +70,7 @@ namespace ARMeilleure.CodeGen.X86
Sse42 = 1 << 20,
Popcnt = 1 << 23,
Aes = 1 << 25,
Osxsave = 1 << 27,
Avx = 1 << 28,
F16c = 1 << 29
}
@ -52,7 +79,11 @@ namespace ARMeilleure.CodeGen.X86
public enum FeatureFlags7Ebx
{
Avx2 = 1 << 5,
Sha = 1 << 29
Avx512f = 1 << 16,
Avx512dq = 1 << 17,
Sha = 1 << 29,
Avx512bw = 1 << 30,
Avx512vl = 1 << 31
}
[Flags]
@ -61,10 +92,21 @@ namespace ARMeilleure.CodeGen.X86
Gfni = 1 << 8,
}
[Flags]
public enum Xcr0FlagsEax
{
Sse = 1 << 1,
YmmHi128 = 1 << 2,
Opmask = 1 << 5,
ZmmHi256 = 1 << 6,
Hi16Zmm = 1 << 7
}
public static FeatureFlags1Edx FeatureInfo1Edx { get; }
public static FeatureFlags1Ecx FeatureInfo1Ecx { get; }
public static FeatureFlags7Ebx FeatureInfo7Ebx { get; } = 0;
public static FeatureFlags7Ecx FeatureInfo7Ecx { get; } = 0;
public static Xcr0FlagsEax Xcr0InfoEax { get; } = 0;
public static bool SupportsSse => FeatureInfo1Edx.HasFlag(FeatureFlags1Edx.Sse);
public static bool SupportsSse2 => FeatureInfo1Edx.HasFlag(FeatureFlags1Edx.Sse2);
@ -76,8 +118,13 @@ namespace ARMeilleure.CodeGen.X86
public static bool SupportsSse42 => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Sse42);
public static bool SupportsPopcnt => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Popcnt);
public static bool SupportsAesni => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Aes);
public static bool SupportsAvx => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Avx);
public static bool SupportsAvx => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Avx | FeatureFlags1Ecx.Osxsave) && Xcr0InfoEax.HasFlag(Xcr0FlagsEax.Sse | Xcr0FlagsEax.YmmHi128);
public static bool SupportsAvx2 => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Avx2) && SupportsAvx;
public static bool SupportsAvx512F => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Avx512f) && FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.Osxsave)
&& Xcr0InfoEax.HasFlag(Xcr0FlagsEax.Sse | Xcr0FlagsEax.YmmHi128 | Xcr0FlagsEax.Opmask | Xcr0FlagsEax.ZmmHi256 | Xcr0FlagsEax.Hi16Zmm);
public static bool SupportsAvx512Vl => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Avx512vl) && SupportsAvx512F;
public static bool SupportsAvx512Bw => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Avx512bw) && SupportsAvx512F;
public static bool SupportsAvx512Dq => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Avx512dq) && SupportsAvx512F;
public static bool SupportsF16c => FeatureInfo1Ecx.HasFlag(FeatureFlags1Ecx.F16c);
public static bool SupportsSha => FeatureInfo7Ebx.HasFlag(FeatureFlags7Ebx.Sha);
public static bool SupportsGfni => FeatureInfo7Ecx.HasFlag(FeatureFlags7Ecx.Gfni);
@ -85,5 +132,6 @@ namespace ARMeilleure.CodeGen.X86
public static bool ForceLegacySse { get; set; }
public static bool SupportsVexEncoding => SupportsAvx && !ForceLegacySse;
public static bool SupportsEvexEncoding => SupportsAvx512F && !ForceLegacySse;
}
}

1
ARMeilleure/CodeGen/X86/IntrinsicTable.cs
View file

@ -182,6 +182,7 @@ namespace ARMeilleure.CodeGen.X86
Add(Intrinsic.X86Vfnmadd231ss, new IntrinsicInfo(X86Instruction.Vfnmadd231ss, IntrinsicType.Fma));
Add(Intrinsic.X86Vfnmsub231sd, new IntrinsicInfo(X86Instruction.Vfnmsub231sd, IntrinsicType.Fma));
Add(Intrinsic.X86Vfnmsub231ss, new IntrinsicInfo(X86Instruction.Vfnmsub231ss, IntrinsicType.Fma));
Add(Intrinsic.X86Vpternlogd, new IntrinsicInfo(X86Instruction.Vpternlogd, IntrinsicType.TernaryImm));
Add(Intrinsic.X86Xorpd, new IntrinsicInfo(X86Instruction.Xorpd, IntrinsicType.Binary));
Add(Intrinsic.X86Xorps, new IntrinsicInfo(X86Instruction.Xorps, IntrinsicType.Binary));
}

1
ARMeilleure/CodeGen/X86/X86Instruction.cs
View file

@ -219,6 +219,7 @@ namespace ARMeilleure.CodeGen.X86
Vfnmsub231sd,
Vfnmsub231ss,
Vpblendvb,
Vpternlogd,
Xor,
Xorpd,
Xorps,