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ryujinx-final/ARMeilleure/CodeGen/X86/Assembler.cs
riperiperi d904706fc0
Use a Jump Table for direct and indirect calls/jumps, removing transitions to managed (#975) 
* Implement Jump Table for Native Calls

NOTE: this slows down rejit considerably! Not recommended to be used
without codegen optimisation or AOT.

- Does not work on Linux
- A32 needs an additional commit.

* A32 Support

(WIP)

* Actually write Direct Call pointers to the table

That would help.

* Direct Calls: Rather than returning to the translator, attempt to keep within the native stack frame.

A return to the translator can still happen, but only by exceptionally
bubbling up to it.

Also:
- Always translate lowCq as a function. Faster interop with the direct
jumps, and this will be useful in future if we want to do speculative
translation.
- Tail Call Detection: after the decoding stage, detect if we do a tail
call, and avoid translating into it. Detected if a jump is made to an
address outwith the contiguous sequence of blocks surrounding the entry
point. The goal is to reduce code touched by jit and rejit.

* A32 Support

* Use smaller max function size for lowCq, fix exceptional returns

When a return has an unexpected value and there is no code block
following this one, we now return the value rather than continuing.

* CompareAndSwap (buggy)

* Ensure CompareAndSwap does not get optimized away.

* Use CompareAndSwap to make the dynamic table thread safe.

* Tail call for linux, throw on too many arguments.

* Combine CompareAndSwap 128 and 32/64.

They emit different IR instructions since their PreAllocator behaviour
is different, but now they just have one function on EmitterContext.

* Fix issues separating from optimisations.

* Use a stub to find and execute missing functions.

This allows us to skip doing many runtime comparisons and branches, and reduces the amount of code we need to emit significantly.

For the indirect call table, this stub also does the work of moving in the highCq address to the table when one is found.

* Make Jump Tables and Jit Cache dynmically resize

Reserve virtual memory, commit as needed.

* Move TailCallRemover to its own class.

* Multithreaded Translation (based on heuristic)

A poor one, at that. Need to get core count for a better one, which
means a lot of OS specific garbage.

* Better priority management for background threads.

* Bound core limit a bit more

Past a certain point the load is not paralellizable and starts stealing from the main thread. Likely due to GC, memory, heap allocation thread contention. Reduce by one core til optimisations come to improve the situation.

* Fix memory management on linux.

* Temporary solution to some sync problems.

This will make sure threads exit correctly, most of the time. There is a potential race where setting the sync counter to 0 does nothing (counter stays at what it was before, thread could take too long to exit), but we need to find a better way to do this anyways. Synchronization frequency has been tightened as we never enter blockwise segments of code. Essentially this means, check every x functions or loop iterations, before lowcq blocks existed and were worth just as much. Ideally it should be done in a better way, since functions can be anywhere from 1 to 5000 instructions. (maybe based on host timer, or an interrupt flag from a scheduler thread)

* Address feedback minus CompareAndSwap change.

* Use default ReservedRegion granularity.

* Merge CompareAndSwap with its V128 variant.

* We already got the source, no need to do it again.

* Make sure all background translation threads exit.

* Fix CompareAndSwap128

Detection criteria was a bit scuffed.

* Address Comments.
2020-03-12 14:20:55 +11:00

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using ARMeilleure.IntermediateRepresentation;
using System;
using System.Diagnostics;
using System.IO;
namespace ARMeilleure.CodeGen.X86
{
class Assembler
{
private const int BadOp = 0;
private const int OpModRMBits = 24;
private const byte RexPrefix = 0x40;
private const byte RexWPrefix = 0x48;
private const byte LockPrefix = 0xf0;
private const int MaxRegNumber = 15;
[Flags]
private enum InstructionFlags
{
None = 0,
RegOnly = 1 << 0,
Reg8Src = 1 << 1,
Reg8Dest = 1 << 2,
RexW = 1 << 3,
Vex = 1 << 4,
PrefixBit = 16,
PrefixMask = 3 << PrefixBit,
Prefix66 = 1 << PrefixBit,
PrefixF3 = 2 << PrefixBit,
PrefixF2 = 3 << PrefixBit
}
private struct InstructionInfo
{
public int OpRMR { get; }
public int OpRMImm8 { get; }
public int OpRMImm32 { get; }
public int OpRImm64 { get; }
public int OpRRM { get; }
public InstructionFlags Flags { get; }
public InstructionInfo(
int opRMR,
int opRMImm8,
int opRMImm32,
int opRImm64,
int opRRM,
InstructionFlags flags)
{
OpRMR = opRMR;
OpRMImm8 = opRMImm8;
OpRMImm32 = opRMImm32;
OpRImm64 = opRImm64;
OpRRM = opRRM;
Flags = flags;
}
}
private static InstructionInfo[] _instTable;
private Stream _stream;
static Assembler()
{
_instTable = new InstructionInfo[(int)X86Instruction.Count];
// Name RM/R RM/I8 RM/I32 R/I64 R/RM Flags
Add(X86Instruction.Add, new InstructionInfo(0x00000001, 0x00000083, 0x00000081, BadOp, 0x00000003, InstructionFlags.None));
Add(X86Instruction.Addpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Addps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex));
Add(X86Instruction.Addsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Addss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.And, new InstructionInfo(0x00000021, 0x04000083, 0x04000081, BadOp, 0x00000023, InstructionFlags.None));
Add(X86Instruction.Andnpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f55, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Andnps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f55, InstructionFlags.Vex));
Add(X86Instruction.Andpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f54, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Andps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f54, InstructionFlags.Vex));
Add(X86Instruction.Blendvpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3815, InstructionFlags.Prefix66));
Add(X86Instruction.Blendvps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3814, InstructionFlags.Prefix66));
Add(X86Instruction.Bsr, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbd, InstructionFlags.None));
Add(X86Instruction.Bswap, new InstructionInfo(0x00000fc8, BadOp, BadOp, BadOp, BadOp, InstructionFlags.RegOnly));
Add(X86Instruction.Call, new InstructionInfo(0x020000ff, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Cmovcc, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f40, InstructionFlags.None));
Add(X86Instruction.Cmp, new InstructionInfo(0x00000039, 0x07000083, 0x07000081, BadOp, 0x0000003b, InstructionFlags.None));
Add(X86Instruction.Cmppd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cmpps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex));
Add(X86Instruction.Cmpsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cmpss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cmpxchg, new InstructionInfo(0x00000fb1, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Cmpxchg16b, new InstructionInfo(0x01000fc7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.RexW));
Add(X86Instruction.Comisd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Comiss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex));
Add(X86Instruction.Cpuid, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fa2, InstructionFlags.RegOnly));
Add(X86Instruction.Cvtdq2pd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe6, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cvtdq2ps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5b, InstructionFlags.Vex));
Add(X86Instruction.Cvtpd2dq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe6, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtpd2ps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cvtps2dq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cvtps2pd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex));
Add(X86Instruction.Cvtsd2si, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2d, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsd2ss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsi2sd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsi2ss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cvtss2sd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cvtss2si, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2d, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Div, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x060000f7, InstructionFlags.None));
Add(X86Instruction.Divpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Divps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex));
Add(X86Instruction.Divsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Divss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Haddpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Haddps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7c, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Idiv, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x070000f7, InstructionFlags.None));
Add(X86Instruction.Imul, new InstructionInfo(BadOp, 0x0000006b, 0x00000069, BadOp, 0x00000faf, InstructionFlags.None));
Add(X86Instruction.Imul128, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x050000f7, InstructionFlags.None));
Add(X86Instruction.Insertps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a21, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Jmp, new InstructionInfo(0x040000ff, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Lea, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x0000008d, InstructionFlags.None));
Add(X86Instruction.Maxpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Maxps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex));
Add(X86Instruction.Maxsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Maxss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Minpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Minps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex));
Add(X86Instruction.Minsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Minss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Mov, new InstructionInfo(0x00000089, BadOp, 0x000000c7, 0x000000b8, 0x0000008b, InstructionFlags.None));
Add(X86Instruction.Mov16, new InstructionInfo(0x00000089, BadOp, 0x000000c7, BadOp, 0x0000008b, InstructionFlags.Prefix66));
Add(X86Instruction.Mov8, new InstructionInfo(0x00000088, 0x000000c6, BadOp, BadOp, 0x0000008a, InstructionFlags.Reg8Src | InstructionFlags.Reg8Dest));
Add(X86Instruction.Movd, new InstructionInfo(0x00000f7e, BadOp, BadOp, BadOp, 0x00000f6e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Movdqu, new InstructionInfo(0x00000f7f, BadOp, BadOp, BadOp, 0x00000f6f, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movhlps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f12, InstructionFlags.Vex));
Add(X86Instruction.Movlhps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f16, InstructionFlags.Vex));
Add(X86Instruction.Movq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7e, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movsd, new InstructionInfo(0x00000f11, BadOp, BadOp, BadOp, 0x00000f10, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Movss, new InstructionInfo(0x00000f11, BadOp, BadOp, BadOp, 0x00000f10, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movsx16, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbf, InstructionFlags.None));
Add(X86Instruction.Movsx32, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000063, InstructionFlags.None));
Add(X86Instruction.Movsx8, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbe, InstructionFlags.Reg8Src));
Add(X86Instruction.Movzx16, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb7, InstructionFlags.None));
Add(X86Instruction.Movzx8, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb6, InstructionFlags.Reg8Src));
Add(X86Instruction.Mul128, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x040000f7, InstructionFlags.None));
Add(X86Instruction.Mulpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Mulps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex));
Add(X86Instruction.Mulsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Mulss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Neg, new InstructionInfo(0x030000f7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Not, new InstructionInfo(0x020000f7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Or, new InstructionInfo(0x00000009, 0x01000083, 0x01000081, BadOp, 0x0000000b, InstructionFlags.None));
Add(X86Instruction.Paddb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffc, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffe, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fd4, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffd, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pand, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fdb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pandn, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fdf, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pavgb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe0, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pavgw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pblendvb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3810, InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f74, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f76, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3829, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f75, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f64, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f66, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3837, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f65, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrb, new InstructionInfo(0x000f3a14, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrd, new InstructionInfo(0x000f3a16, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrq, new InstructionInfo(0x000f3a16, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.RexW | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc5, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a20, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a22, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a22, InstructionFlags.Vex | InstructionFlags.RexW | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc4, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fee, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxub, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fde, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxud, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxuw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3838, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3839, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fea, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminub, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fda, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminud, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminuw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3820, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3825, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3823, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3830, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3835, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3833, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmulld, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3840, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmullw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fd5, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pop, new InstructionInfo(0x0000008f, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Popcnt, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb8, InstructionFlags.PrefixF3));
Add(X86Instruction.Por, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000feb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pshufb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3800, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pshufd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f70, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pslld, new InstructionInfo(BadOp, 0x06000f72, BadOp, BadOp, 0x00000ff2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pslldq, new InstructionInfo(BadOp, 0x07000f73, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psllq, new InstructionInfo(BadOp, 0x06000f73, BadOp, BadOp, 0x00000ff3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psllw, new InstructionInfo(BadOp, 0x06000f71, BadOp, BadOp, 0x00000ff1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrad, new InstructionInfo(BadOp, 0x04000f72, BadOp, BadOp, 0x00000fe2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psraw, new InstructionInfo(BadOp, 0x04000f71, BadOp, BadOp, 0x00000fe1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrld, new InstructionInfo(BadOp, 0x02000f72, BadOp, BadOp, 0x00000fd2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrlq, new InstructionInfo(BadOp, 0x02000f73, BadOp, BadOp, 0x00000fd3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrldq, new InstructionInfo(BadOp, 0x03000f73, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrlw, new InstructionInfo(BadOp, 0x02000f71, BadOp, BadOp, 0x00000fd1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ff8, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffa, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ff9, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f68, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhqdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f69, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f60, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckldq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f62, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklqdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f61, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Push, new InstructionInfo(BadOp, 0x0000006a, 0x00000068, BadOp, 0x060000ff, InstructionFlags.None));
Add(X86Instruction.Pxor, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fef, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Rcpps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f53, InstructionFlags.Vex));
Add(X86Instruction.Rcpss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f53, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Ror, new InstructionInfo(0x010000d3, 0x010000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Roundpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a09, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a08, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a0b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a0a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Rsqrtps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f52, InstructionFlags.Vex));
Add(X86Instruction.Rsqrtss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f52, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Sar, new InstructionInfo(0x070000d3, 0x070000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Setcc, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f90, InstructionFlags.Reg8Dest));
Add(X86Instruction.Shl, new InstructionInfo(0x040000d3, 0x040000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Shr, new InstructionInfo(0x050000d3, 0x050000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Shufpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc6, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Shufps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc6, InstructionFlags.Vex));
Add(X86Instruction.Sqrtpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Sqrtps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex));
Add(X86Instruction.Sqrtsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Sqrtss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Sub, new InstructionInfo(0x00000029, 0x05000083, 0x05000081, BadOp, 0x0000002b, InstructionFlags.None));
Add(X86Instruction.Subpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Subps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex));
Add(X86Instruction.Subsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Subss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Test, new InstructionInfo(0x00000085, BadOp, 0x000000f7, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Unpckhpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f15, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Unpckhps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f15, InstructionFlags.Vex));
Add(X86Instruction.Unpcklpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f14, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Unpcklps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f14, InstructionFlags.Vex));
Add(X86Instruction.Vblendvpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a4b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Vblendvps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a4a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Vpblendvb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a4c, InstructionFlags.Vex | 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));
}
private static void Add(X86Instruction inst, InstructionInfo info)
{
_instTable[(int)inst] = info;
}
public Assembler(Stream stream)
{
_stream = stream;
}
public void Add(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Add);
}
public void Addsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Addsd);
}
public void Addss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Addss);
}
public void And(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.And);
}
public void Bsr(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Bsr);
}
public void Bswap(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Bswap);
}
public void Call(Operand dest)
{
WriteInstruction(dest, null, OperandType.None, X86Instruction.Call);
}
public void Cdq()
{
WriteByte(0x99);
}
public void Cmovcc(Operand dest, Operand source, OperandType type, X86Condition condition)
{
InstructionInfo info = _instTable[(int)X86Instruction.Cmovcc];
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM | (int)condition, rrm: true);
}
public void Cmp(Operand src1, Operand src2, OperandType type)
{
WriteInstruction(src1, src2, type, X86Instruction.Cmp);
}
public void Cqo()
{
WriteByte(0x48);
WriteByte(0x99);
}
public void Cmpxchg(MemoryOperand memOp, Operand src)
{
WriteByte(LockPrefix);
WriteInstruction(memOp, src, src.Type, X86Instruction.Cmpxchg);
}
public void Cmpxchg16b(MemoryOperand memOp)
{
WriteByte(LockPrefix);
WriteInstruction(memOp, null, OperandType.None, X86Instruction.Cmpxchg16b);
}
public void Comisd(Operand src1, Operand src2)
{
WriteInstruction(src1, null, src2, X86Instruction.Comisd);
}
public void Comiss(Operand src1, Operand src2)
{
WriteInstruction(src1, null, src2, X86Instruction.Comiss);
}
public void Cpuid()
{
WriteInstruction(null, null, OperandType.None, X86Instruction.Cpuid);
}
public void Cvtsd2ss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsd2ss);
}
public void Cvtsi2sd(Operand dest, Operand src1, Operand src2, OperandType type)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsi2sd, type);
}
public void Cvtsi2ss(Operand dest, Operand src1, Operand src2, OperandType type)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsi2ss, type);
}
public void Cvtss2sd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtss2sd);
}
public void Div(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Div);
}
public void Divsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Divsd);
}
public void Divss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Divss);
}
public void Idiv(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Idiv);
}
public void Imul(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Imul128);
}
public void Imul(Operand dest, Operand source, OperandType type)
{
if (source.Kind != OperandKind.Register)
{
throw new ArgumentException($"Invalid source operand kind \"{source.Kind}\".");
}
WriteInstruction(dest, source, type, X86Instruction.Imul);
}
public void Imul(Operand dest, Operand src1, Operand src2, OperandType type)
{
InstructionInfo info = _instTable[(int)X86Instruction.Imul];
if (src2.Kind != OperandKind.Constant)
{
throw new ArgumentException($"Invalid source 2 operand kind \"{src2.Kind}\".");
}
if (IsImm8(src2.Value, src2.Type) && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, null, src1, type, info.Flags, info.OpRMImm8, rrm: true);
WriteByte(src2.AsByte());
}
else if (IsImm32(src2.Value, src2.Type) && info.OpRMImm32 != BadOp)
{
WriteOpCode(dest, null, src1, type, info.Flags, info.OpRMImm32, rrm: true);
WriteInt32(src2.AsInt32());
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{src2.Value:X}.");
}
}
public void Insertps(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Insertps);
WriteByte(imm);
}
public void Jcc(X86Condition condition, long offset)
{
if (ConstFitsOnS8(offset))
{
WriteByte((byte)(0x70 | (int)condition));
WriteByte((byte)offset);
}
else if (ConstFitsOnS32(offset))
{
WriteByte(0x0f);
WriteByte((byte)(0x80 | (int)condition));
WriteInt32((int)offset);
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public void Jmp(long offset)
{
if (ConstFitsOnS8(offset))
{
WriteByte(0xeb);
WriteByte((byte)offset);
}
else if (ConstFitsOnS32(offset))
{
WriteByte(0xe9);
WriteInt32((int)offset);
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public void Jmp(Operand dest)
{
WriteInstruction(dest, null, OperandType.None, X86Instruction.Jmp);
}
public void Lea(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Lea);
}
public void Mov(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Mov);
}
public void Mov16(Operand dest, Operand source)
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Mov16);
}
public void Mov8(Operand dest, Operand source)
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Mov8);
}
public void Movd(Operand dest, Operand source)
{
InstructionInfo info = _instTable[(int)X86Instruction.Movd];
if (source.Type.IsInteger() || source.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, info.Flags, info.OpRRM, rrm: true);
}
else
{
WriteOpCode(dest, null, source, OperandType.None, info.Flags, info.OpRMR);
}
}
public void Movdqu(Operand dest, Operand source)
{
WriteInstruction(dest, null, source, X86Instruction.Movdqu);
}
public void Movhlps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movhlps);
}
public void Movlhps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movlhps);
}
public void Movq(Operand dest, Operand source)
{
InstructionInfo info = _instTable[(int)X86Instruction.Movd];
InstructionFlags flags = info.Flags | InstructionFlags.RexW;
if (source.Type.IsInteger() || source.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, flags, info.OpRRM, rrm: true);
}
else if (dest.Type.IsInteger() || dest.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, flags, info.OpRMR);
}
else
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Movq);
}
}
public void Movsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movsd);
}
public void Movss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movss);
}
public void Movsx16(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx16);
}
public void Movsx32(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx32);
}
public void Movsx8(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx8);
}
public void Movzx16(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movzx16);
}
public void Movzx8(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movzx8);
}
public void Mul(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Mul128);
}
public void Mulsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Mulsd);
}
public void Mulss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Mulss);
}
public void Neg(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Neg);
}
public void Not(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Not);
}
public void Or(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Or);
}
public void Pcmpeqw(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pcmpeqw);
}
public void Pextrb(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrb);
WriteByte(imm);
}
public void Pextrd(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrd);
WriteByte(imm);
}
public void Pextrq(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrq);
WriteByte(imm);
}
public void Pextrw(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrw);
WriteByte(imm);
}
public void Pinsrb(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrb);
WriteByte(imm);
}
public void Pinsrd(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrd);
WriteByte(imm);
}
public void Pinsrq(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrq);
WriteByte(imm);
}
public void Pinsrw(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrw);
WriteByte(imm);
}
public void Pop(Operand dest)
{
if (dest.Kind == OperandKind.Register)
{
WriteCompactInst(dest, 0x58);
}
else
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Pop);
}
}
public void Popcnt(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Popcnt);
}
public void Pshufd(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pshufd);
WriteByte(imm);
}
public void Push(Operand source)
{
if (source.Kind == OperandKind.Register)
{
WriteCompactInst(source, 0x50);
}
else
{
WriteInstruction(null, source, source.Type, X86Instruction.Push);
}
}
public void Return()
{
WriteByte(0xc3);
}
public void Ror(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Ror);
}
public void Sar(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Sar);
}
public void Shl(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Shl);
}
public void Shr(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Shr);
}
public void Setcc(Operand dest, X86Condition condition)
{
InstructionInfo info = _instTable[(int)X86Instruction.Setcc];
WriteOpCode(dest, null, null, OperandType.None, info.Flags, info.OpRRM | (int)condition);
}
public void Sub(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Sub);
}
public void Subsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Subsd);
}
public void Subss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Subss);
}
public void Test(Operand src1, Operand src2, OperandType type)
{
WriteInstruction(src1, src2, type, X86Instruction.Test);
}
public void Xor(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Xor);
}
public void Xorps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Xorps);
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand source,
OperandType type = OperandType.None)
{
WriteInstruction(dest, null, source, inst, type);
}
public void WriteInstruction(X86Instruction inst, Operand dest, Operand src1, Operand src2)
{
if (src2.Kind == OperandKind.Constant)
{
WriteInstruction(src1, dest, src2, inst);
}
else
{
WriteInstruction(dest, src1, src2, inst);
}
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand src1,
Operand src2,
OperandType type)
{
WriteInstruction(dest, src1, src2, inst, type);
}
public void WriteInstruction(X86Instruction inst, Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, inst);
WriteByte(imm);
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand src1,
Operand src2,
Operand src3)
{
// 3+ operands can only be encoded with the VEX encoding scheme.
Debug.Assert(HardwareCapabilities.SupportsVexEncoding);
WriteInstruction(dest, src1, src2, inst);
WriteByte((byte)(src3.AsByte() << 4));
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand src1,
Operand src2,
byte imm)
{
WriteInstruction(dest, src1, src2, inst);
WriteByte(imm);
}
private void WriteShiftInst(Operand dest, Operand source, OperandType type, X86Instruction inst)
{
if (source.Kind == OperandKind.Register)
{
X86Register shiftReg = (X86Register)source.GetRegister().Index;
Debug.Assert(shiftReg == X86Register.Rcx, $"Invalid shift register \"{shiftReg}\".");
source = null;
}
WriteInstruction(dest, source, type, inst);
}
private void WriteInstruction(Operand dest, Operand source, OperandType type, X86Instruction inst)
{
InstructionInfo info = _instTable[(int)inst];
if (source != null)
{
if (source.Kind == OperandKind.Constant)
{
ulong imm = source.Value;
if (inst == X86Instruction.Mov8)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else if (inst == X86Instruction.Mov16)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm32);
WriteInt16((short)imm);
}
else if (IsImm8(imm, type) && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else if (IsImm32(imm, type) && info.OpRMImm32 != BadOp)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm32);
WriteInt32((int)imm);
}
else if (dest != null && dest.Kind == OperandKind.Register && info.OpRImm64 != BadOp)
{
int rexPrefix = GetRexPrefix(dest, source, type, rrm: false);
if (rexPrefix != 0)
{
WriteByte((byte)rexPrefix);
}
WriteByte((byte)(info.OpRImm64 + (dest.GetRegister().Index & 0b111)));
WriteUInt64(imm);
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{imm:X}.");
}
}
else if (source.Kind == OperandKind.Register && info.OpRMR != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRMR);
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM, rrm: true);
}
else
{
throw new ArgumentException($"Invalid source operand kind \"{source.Kind}\".");
}
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM, rrm: true);
}
else if (info.OpRMR != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRMR);
}
else
{
throw new ArgumentNullException(nameof(source));
}
}
private void WriteInstruction(
Operand dest,
Operand src1,
Operand src2,
X86Instruction inst,
OperandType type = OperandType.None)
{
InstructionInfo info = _instTable[(int)inst];
if (src2 != null)
{
if (src2.Kind == OperandKind.Constant)
{
ulong imm = src2.Value;
if ((byte)imm == imm && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, src1, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{imm:X}.");
}
}
else if (src2.Kind == OperandKind.Register && info.OpRMR != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRMR);
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRRM, rrm: true);
}
else
{
throw new ArgumentException($"Invalid source operand kind \"{src2.Kind}\".");
}
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRRM, rrm: true);
}
else if (info.OpRMR != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRMR);
}
else
{
throw new ArgumentNullException(nameof(src2));
}
}
private void WriteOpCode(
Operand dest,
Operand src1,
Operand src2,
OperandType type,
InstructionFlags flags,
int opCode,
bool rrm = false)
{
int rexPrefix = GetRexPrefix(dest, src2, type, rrm);
if ((flags & InstructionFlags.RexW) != 0)
{
rexPrefix |= RexWPrefix;
}
int modRM = (opCode >> OpModRMBits) << 3;
MemoryOperand memOp = null;
if (dest != null)
{
if (dest.Kind == OperandKind.Register)
{
int regIndex = dest.GetRegister().Index;
modRM |= (regIndex & 0b111) << (rrm ? 3 : 0);
if ((flags & InstructionFlags.Reg8Dest) != 0 && regIndex >= 4)
{
rexPrefix |= RexPrefix;
}
}
else if (dest.Kind == OperandKind.Memory)
{
memOp = dest as MemoryOperand;
}
else
{
throw new ArgumentException("Invalid destination operand kind \"" + dest.Kind + "\".");
}
}
if (src2 != null)
{
if (src2.Kind == OperandKind.Register)
{
int regIndex = src2.GetRegister().Index;
modRM |= (regIndex & 0b111) << (rrm ? 0 : 3);
if ((flags & InstructionFlags.Reg8Src) != 0 && regIndex >= 4)
{
rexPrefix |= RexPrefix;
}
}
else if (src2.Kind == OperandKind.Memory && memOp == null)
{
memOp = src2 as MemoryOperand;
}
else
{
throw new ArgumentException("Invalid source operand kind \"" + src2.Kind + "\".");
}
}
bool needsSibByte = false;
bool needsDisplacement = false;
int sib = 0;
if (memOp != null)
{
// Either source or destination is a memory operand.
Register baseReg = memOp.BaseAddress.GetRegister();
X86Register baseRegLow = (X86Register)(baseReg.Index & 0b111);
needsSibByte = memOp.Index != null || baseRegLow == X86Register.Rsp;
needsDisplacement = memOp.Displacement != 0 || baseRegLow == X86Register.Rbp;
if (needsDisplacement)
{
if (ConstFitsOnS8(memOp.Displacement))
{
modRM |= 0x40;
}
else /* if (ConstFitsOnS32(memOp.Displacement)) */
{
modRM |= 0x80;
}
}
if (baseReg.Index >= 8)
{
Debug.Assert((uint)baseReg.Index <= MaxRegNumber);
rexPrefix |= RexPrefix | (baseReg.Index >> 3);
}
if (needsSibByte)
{
sib = (int)baseRegLow;
if (memOp.Index != null)
{
int indexReg = memOp.Index.GetRegister().Index;
Debug.Assert(indexReg != (int)X86Register.Rsp, "Using RSP as index register on the memory operand is not allowed.");
if (indexReg >= 8)
{
Debug.Assert((uint)indexReg <= MaxRegNumber);
rexPrefix |= RexPrefix | (indexReg >> 3) << 1;
}
sib |= (indexReg & 0b111) << 3;
}
else
{
sib |= 0b100 << 3;
}
sib |= (int)memOp.Scale << 6;
modRM |= 0b100;
}
else
{
modRM |= (int)baseRegLow;
}
}
else
{
// Source and destination are registers.
modRM |= 0xc0;
}
Debug.Assert(opCode != BadOp, "Invalid opcode value.");
if ((flags & InstructionFlags.Vex) != 0 && HardwareCapabilities.SupportsVexEncoding)
{
int vexByte2 = (int)(flags & InstructionFlags.PrefixMask) >> (int)InstructionFlags.PrefixBit;
if (src1 != null)
{
vexByte2 |= (src1.GetRegister().Index ^ 0xf) << 3;
}
else
{
vexByte2 |= 0b1111 << 3;
}
ushort opCodeHigh = (ushort)(opCode >> 8);
if ((rexPrefix & 0b1011) == 0 && opCodeHigh == 0xf)
{
// Two-byte form.
WriteByte(0xc5);
vexByte2 |= (~rexPrefix & 4) << 5;
WriteByte((byte)vexByte2);
}
else
{
// Three-byte form.
WriteByte(0xc4);
int vexByte1 = (~rexPrefix & 7) << 5;
switch (opCodeHigh)
{
case 0xf: vexByte1 |= 1; break;
case 0xf38: vexByte1 |= 2; break;
case 0xf3a: vexByte1 |= 3; break;
default: Debug.Assert(false, $"Failed to VEX encode opcode 0x{opCode:X}."); break;
}
vexByte2 |= (rexPrefix & 8) << 4;
WriteByte((byte)vexByte1);
WriteByte((byte)vexByte2);
}
opCode &= 0xff;
}
else
{
switch (flags & InstructionFlags.PrefixMask)
{
case InstructionFlags.Prefix66: WriteByte(0x66); break;
case InstructionFlags.PrefixF2: WriteByte(0xf2); break;
case InstructionFlags.PrefixF3: WriteByte(0xf3); break;
}
if (rexPrefix != 0)
{
WriteByte((byte)rexPrefix);
}
}
if (dest != null && (flags & InstructionFlags.RegOnly) != 0)
{
opCode += dest.GetRegister().Index & 7;
}
if ((opCode & 0xff0000) != 0)
{
WriteByte((byte)(opCode >> 16));
}
if ((opCode & 0xff00) != 0)
{
WriteByte((byte)(opCode >> 8));
}
WriteByte((byte)opCode);
if ((flags & InstructionFlags.RegOnly) == 0)
{
WriteByte((byte)modRM);
if (needsSibByte)
{
WriteByte((byte)sib);
}
if (needsDisplacement)
{
if (ConstFitsOnS8(memOp.Displacement))
{
WriteByte((byte)memOp.Displacement);
}
else /* if (ConstFitsOnS32(memOp.Displacement)) */
{
WriteInt32(memOp.Displacement);
}
}
}
}
private void WriteCompactInst(Operand operand, int opCode)
{
int regIndex = operand.GetRegister().Index;
if (regIndex >= 8)
{
WriteByte(0x41);
}
WriteByte((byte)(opCode + (regIndex & 0b111)));
}
private static int GetRexPrefix(Operand dest, Operand source, OperandType type, bool rrm)
{
int rexPrefix = 0;
if (Is64Bits(type))
{
rexPrefix = RexWPrefix;
}
void SetRegisterHighBit(Register reg, int bit)
{
if (reg.Index >= 8)
{
rexPrefix |= RexPrefix | (reg.Index >> 3) << bit;
}
}
if (dest != null && dest.Kind == OperandKind.Register)
{
SetRegisterHighBit(dest.GetRegister(), rrm ? 2 : 0);
}
if (source != null && source.Kind == OperandKind.Register)
{
SetRegisterHighBit(source.GetRegister(), rrm ? 0 : 2);
}
return rexPrefix;
}
private static bool Is64Bits(OperandType type)
{
return type == OperandType.I64 || type == OperandType.FP64;
}
private static bool IsImm8(ulong immediate, OperandType type)
{
long value = type == OperandType.I32 ? (int)immediate : (long)immediate;
return ConstFitsOnS8(value);
}
private static bool IsImm32(ulong immediate, OperandType type)
{
long value = type == OperandType.I32 ? (int)immediate : (long)immediate;
return ConstFitsOnS32(value);
}
public static int GetJccLength(long offset)
{
if (ConstFitsOnS8(offset < 0 ? offset - 2 : offset))
{
return 2;
}
else if (ConstFitsOnS32(offset < 0 ? offset - 6 : offset))
{
return 6;
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public static int GetJmpLength(long offset)
{
if (ConstFitsOnS8(offset < 0 ? offset - 2 : offset))
{
return 2;
}
else if (ConstFitsOnS32(offset < 0 ? offset - 5 : offset))
{
return 5;
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
private static bool ConstFitsOnS8(long value)
{
return value == (sbyte)value;
}
private static bool ConstFitsOnS32(long value)
{
return value == (int)value;
}
private void WriteInt16(short value)
{
WriteUInt16((ushort)value);
}
private void WriteInt32(int value)
{
WriteUInt32((uint)value);
}
private void WriteByte(byte value)
{
_stream.WriteByte(value);
}
private void WriteUInt16(ushort value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
}
private void WriteUInt32(uint value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
_stream.WriteByte((byte)(value >> 16));
_stream.WriteByte((byte)(value >> 24));
}
private void WriteUInt64(ulong value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
_stream.WriteByte((byte)(value >> 16));
_stream.WriteByte((byte)(value >> 24));
_stream.WriteByte((byte)(value >> 32));
_stream.WriteByte((byte)(value >> 40));
_stream.WriteByte((byte)(value >> 48));
_stream.WriteByte((byte)(value >> 56));
}
}
}
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