diff options
Diffstat (limited to 'ARMeilleure/CodeGen/X86/Assembler.cs')
| -rw-r--r-- | ARMeilleure/CodeGen/X86/Assembler.cs | 1358 |
1 files changed, 1358 insertions, 0 deletions
diff --git a/ARMeilleure/CodeGen/X86/Assembler.cs b/ARMeilleure/CodeGen/X86/Assembler.cs new file mode 100644 index 00000000..c6483894 --- /dev/null +++ b/ARMeilleure/CodeGen/X86/Assembler.cs @@ -0,0 +1,1358 @@ +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; + + [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.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.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, 0x00000f2c, 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.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.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.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 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 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 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; + + if (shiftReg != X86Register.Rcx) + { + throw new ArgumentException($"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) + { + rexPrefix |= RexPrefix | (baseReg.Index >> 3); + } + + if (needsSibByte) + { + sib = (int)baseRegLow; + + if (memOp.Index != null) + { + int indexReg = memOp.Index.GetRegister().Index; + + if (indexReg == (int)X86Register.Rsp) + { + throw new ArgumentException("Using RSP as index register on the memory operand is not allowed."); + } + + if (indexReg >= 8) + { + 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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