private static void InsertTop(
int XMask,
int Value,
AInst Inst,
AExecutionMode Mode)
{
TreeNode Node = new TreeNode(XMask, Value, Inst);
if (Mode == AExecutionMode.AArch64)
{
Node.Next = InstHeadA64;
InstHeadA64 = Node;
}
else
{
Node.Next = InstHeadA32;
InstHeadA32 = Node;
}
}
public AOpCodeSimdMemMs(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
switch ((OpCode >> 12) & 0xf)
{
case 0b0000: Reps = 1; SElems = 4; break;
case 0b0010: Reps = 4; SElems = 1; break;
case 0b0100: Reps = 1; SElems = 3; break;
case 0b0110: Reps = 3; SElems = 1; break;
case 0b0111: Reps = 1; SElems = 1; break;
case 0b1000: Reps = 1; SElems = 2; break;
case 0b1010: Reps = 2; SElems = 1; break;
default: Inst = AInst.Undefined; return;
}
Size = (OpCode >> 10) & 0x3;
WBack = ((OpCode >> 23) & 0x1) != 0;
bool Q = ((OpCode >> 30) & 1) != 0;
if (!Q && Size == 3 && SElems != 1)
{
Inst = AInst.Undefined;
return;
}
RegisterSize = Q
? ARegisterSize.SIMD128
: ARegisterSize.SIMD64;
Elems = (GetBitsCount() >> 3) >> Size;
}
public AOpCodeSimdRegElemF(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
switch ((OpCode >> 21) & 3) // sz:L
{
case 0: // H:0
Index = (OpCode >> 10) & 2; // 0, 2
break;
case 1: // H:1
Index = (OpCode >> 10) & 2;
Index++; // 1, 3
break;
case 2: // H
Index = (OpCode >> 11) & 1; // 0, 1
break;
default: Emitter = AInstEmit.Und; return;
}
}
public AOpCodeMov(AInst Inst, long Position, int OpCode) : base(Inst, Position)
{
int P1 = (OpCode >> 22) & 1;
int SF = (OpCode >> 31) & 1;
if (SF == 0 && P1 != 0)
{
Emitter = AInstEmit.Und;
return;
}
Rd = (OpCode >> 0) & 0x1f;
Imm = (OpCode >> 5) & 0xffff;
Pos = (OpCode >> 21) & 0x3;
Pos <<= 4;
Imm <<= Pos;
RegisterSize = (OpCode >> 31) != 0
? ARegisterSize.Int64
: ARegisterSize.Int32;
}
public InstInfo(int Mask, int Value, AInst Inst)
{
this.Mask = Mask;
this.Value = Value;
this.Inst = Inst;
}
public A32OpCode(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Cond = (ACond)((uint)OpCode >> 28);
}
public AOpCodeBImmAl(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Imm = Position + ADecoderHelper.DecodeImm26_2(OpCode);
}
public AOpCodeException(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Id = (OpCode >> 5) & 0xffff;
}
public AOpCodeSimdExt(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Imm4 = (OpCode >> 11) & 0xf;
}
public AOpCodeCcmpImm(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
}
public AOpCodeMem(AInst Inst, long Position, int OpCode) : base(Inst, Position)
{
Rt = (OpCode >> 0) & 0x1f;
Rn = (OpCode >> 5) & 0x1f;
Size = (OpCode >> 30) & 0x3;
}
public AOpCodeSimdTbl(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Size = ((OpCode >> 13) & 3) + 1;
}
public AOpCodeCsel(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Rm = (OpCode >> 16) & 0x1f;
Cond = (ACond)((OpCode >> 12) & 0xf);
}
public AOpCodeBImm(AInst Inst, long Position) : base(Inst, Position)
{
}
public AOpCodeAluRx(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Shift = (OpCode >> 10) & 0x7;
IntType = (AIntType)((OpCode >> 13) & 0x7);
Rm = (OpCode >> 16) & 0x1f;
}
private static void Set(string Encoding, AInst Inst, AExecutionMode Mode)
{
int Bit = Encoding.Length - 1;
int Value = 0;
int XMask = 0;
int XBits = 0;
int[] XPos = new int[Encoding.Length];
int Blacklisted = 0;
for (int Index = 0; Index < Encoding.Length; Index++, Bit--)
{
//Note: < and > are used on special encodings.
//The < means that we should never have ALL bits with the '<' set.
//So, when the encoding has <<, it means that 00, 01, and 10 are valid,
//but not 11. <<< is 000, 001, ..., 110 but NOT 111, and so on...
//For >, the invalid value is zero. So, for >> 01, 10 and 11 are valid,
//but 00 isn't.
char Chr = Encoding[Index];
if (Chr == '1')
{
Value |= 1 << Bit;
}
else if (Chr == 'x')
{
XMask |= 1 << Bit;
}
else if (Chr == '>')
{
XPos[XBits++] = Bit;
}
else if (Chr == '<')
{
XPos[XBits++] = Bit;
Blacklisted |= 1 << Bit;
}
else if (Chr != '0')
{
throw new ArgumentException(nameof(Encoding));
}
}
XMask = ~XMask;
if (XBits == 0)
{
InsertInst(XMask, Value, Inst, Mode);
return;
}
for (int Index = 0; Index < (1 << XBits); Index++)
{
int Mask = 0;
for (int X = 0; X < XBits; X++)
{
Mask |= ((Index >> X) & 1) << XPos[X];
}
if (Mask != Blacklisted)
{
InsertInst(XMask, Value | Mask, Inst, Mode);
}
}
}
public AOpCodeMul(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Ra = (OpCode >> 10) & 0x1f;
Rm = (OpCode >> 16) & 0x1f;
}
public AOpCodeBImmCmp(AInst Inst, long Position, int OpCode) : base(Inst, Position)
{
Rt = OpCode & 0x1f;
Imm = Position + ADecoderHelper.DecodeImmS19_2(OpCode);
}
public AOpCodeMemEx(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Rt2 = (OpCode >> 10) & 0x1f;
Rs = (OpCode >> 16) & 0x1f;
}
public A32OpCodeBImmAl(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Imm = (OpCode << 8) >> 6;
H = (OpCode >> 23) & 2;
}
public TreeNode(int Mask, int Value, AInst Inst)
{
this.Mask = Mask;
this.Value = Value;
this.Inst = Inst;
}
public AOpCodeSimdReg(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Bit3 = ((OpCode >> 3) & 0x1) != 0;
Ra = (OpCode >> 10) & 0x1f;
Rm = (OpCode >> 16) & 0x1f;
}
public AOpCodeSimdMemReg(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Size |= (OpCode >> 21) & 4;
Extend64 = false;
}
public AOpCodeSimdMemSs(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
int Size = (OpCode >> 10) & 3;
int S = (OpCode >> 12) & 1;
int SElems = (OpCode >> 12) & 2;
int Scale = (OpCode >> 14) & 3;
int L = (OpCode >> 22) & 1;
int Q = (OpCode >> 30) & 1;
SElems |= (OpCode >> 21) & 1;
SElems++;
int Index = (Q << 3) | (S << 2) | Size;
switch (Scale)
{
case 1:
{
if ((Size & 1) != 0)
{
Inst = AInst.Undefined;
return;
}
Index >>= 1;
break;
}
case 2:
{
if ((Size & 2) != 0 ||
((Size & 1) != 0 && S != 0))
{
Inst = AInst.Undefined;
return;
}
if ((Size & 1) != 0)
{
Index >>= 3;
Scale = 3;
}
else
{
Index >>= 2;
}
break;
}
case 3:
{
if (L == 0 || S != 0)
{
Inst = AInst.Undefined;
return;
}
Scale = Size;
Replicate = true;
break;
}
}
this.Index = Index;
this.SElems = SElems;
this.Size = Scale;
Extend64 = false;
WBack = ((OpCode >> 23) & 0x1) != 0;
RegisterSize = Q != 0
? ARegisterSize.SIMD128
: ARegisterSize.SIMD64;
}
public AOpCodeSimdFcond(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
NZCV = (OpCode >> 0) & 0xf;
Cond = (ACond)((OpCode >> 12) & 0xf);
}
private static void Set(string Encoding, AInst Inst)
{
int Bit = Encoding.Length - 1;
int Value = 0;
int XMask = 0;
int ZCount = 0;
int OCount = 0;
int[] ZPos = new int[Encoding.Length];
int[] OPos = new int[Encoding.Length];
for (int Index = 0; Index < Encoding.Length; Index++, Bit--)
{
//Note: < and > are used on special encodings.
//The < means that we should never have ALL bits with the '<' set.
//So, when the encoding has <<, it means that 00, 01, and 10 are valid,
//but not 11. <<< is 000, 001, ..., 110 but NOT 111, and so on...
//For >, the invalid value is zero. So, for << 01, 10 and 11 are valid,
//but 00 isn't.
switch (Encoding[Index])
{
case '0': /* Do nothing. */ break;
case '1': Value |= 1 << Bit; break;
case 'x': XMask |= 1 << Bit; break;
case '<': OPos[OCount++] = Bit; break;
case '>': ZPos[ZCount++] = Bit; break;
default: throw new ArgumentException(nameof(Encoding));
}
}
if (ZCount + OCount == 0)
{
InsertTop(XMask, Value, Inst);
}
else if (ZCount != 0 && OCount != 0)
{
//When both the > and the <, then a value is blacklisted,
//with > indicating 0, and < indicating 1. So, for example, ><<
//blacklists the pattern 011, but 000, 001, 010, 100, 101,
//110 and 111 are valid.
for (int OCtr = 0; (uint)OCtr < (1 << OCount); OCtr++)
{
int OVal = Value;
for (int O = 0; O < OCount; O++)
{
OVal |= ((OCtr >> O) & 1) << OPos[O];
}
int ZStart = OCtr == (1 << OCount) ? 1 : 0;
InsertWithCtr(ZStart, 1 << ZCount, ZCount, ZPos, XMask, OVal, Inst);
}
}
else if (ZCount != 0)
{
InsertWithCtr(1, 1 << ZCount, ZCount, ZPos, XMask, Value, Inst);
}
else if (OCount != 0)
{
InsertWithCtr(0, (1 << OCount) - 1, OCount, OPos, XMask, Value, Inst);
}
}
public AOpCodeSimdShImm(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Imm = (OpCode >> 16) & 0x7f;
Size = ABitUtils.HighestBitSetNibble(Imm >> 3);
}
