/// <summary>
/// Emits the specified platform instruction.
/// </summary>
/// <param name="node">The context.</param>
/// <param name="emitter">The emitter.</param>
internal override void EmitLegacy(InstructionNode node, X86CodeEmitter emitter)
{
Debug.Assert(node.Result == node.Operand1);
LegacyOpCode opCode = ComputeOpCode(node.Result, node.Operand1, node.Operand2);
emitter.Emit(opCode, node.Result, node.Operand2);
}
/// <summary>
/// Emits the specified platform instruction.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="emitter">The emitter.</param>
internal override void EmitLegacy(InstructionNode node, X86CodeEmitter emitter)
{
LegacyOpCode opCode = ComputeOpCode(node.Result, node.Operand1, null);
if (node.Result.Register is ControlRegister)
{
emitter.Emit(opCode, node.Result, node.Operand1);
}
else
{
emitter.Emit(opCode, node.Operand1, node.Result);
}
}
private static readonly LegacyOpCode CMOVG = new LegacyOpCode(new byte[] { 0x0F, 0x4F }); // GreaterThan (ZF = 0 and SF = OF)
#endregion Data Members
#region Methods
/// <summary>
/// Emits the specified platform instruction.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="emitter">The emitter.</param>
/// <exception cref="System.NotSupportedException"></exception>
internal override void EmitLegacy(InstructionNode node, X86CodeEmitter emitter)
{
LegacyOpCode opcode = null;
switch (node.ConditionCode)
{
case ConditionCode.Equal: opcode = CMOVO; break;
case ConditionCode.NotEqual: opcode = CMOVNE; break;
case ConditionCode.Zero: opcode = CMOVZ; break;
case ConditionCode.NotZero: opcode = CMOVNZ; break;
case ConditionCode.GreaterOrEqual: opcode = CMOVGE; break;
case ConditionCode.GreaterThan: opcode = CMOVG; break;
case ConditionCode.LessOrEqual: opcode = CMOVLE; break;
case ConditionCode.LessThan: opcode = CMOVL; break;
case ConditionCode.UnsignedGreaterOrEqual: opcode = CMOVNB; break;
case ConditionCode.UnsignedGreaterThan: opcode = CMOVA; break;
case ConditionCode.UnsignedLessOrEqual: opcode = CMOVBE; break;
case ConditionCode.UnsignedLessThan: opcode = CMOVB; break;
case ConditionCode.Signed: opcode = CMOVS; break;
case ConditionCode.NotSigned: opcode = CMOVNS; break;
case ConditionCode.Carry: opcode = CMOVC; break;
case ConditionCode.NoCarry: opcode = CMOVNC; break;
case ConditionCode.Overflow: opcode = CMOVO; break;
case ConditionCode.NoOverflow: opcode = CMOVNO; break;
case ConditionCode.Parity: opcode = CMOVP; break;
case ConditionCode.NoParity: opcode = CMOVNP; break;
default: throw new NotSupportedException();
}
emitter.Emit(opcode, node.Result, node.Operand1);
}
/// <summary>
/// Emits the specified platform instruction.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="emitter">The emitter.</param>
internal override void EmitLegacy(InstructionNode node, X86CodeEmitter emitter)
{
LegacyOpCode opCode = ComputeOpCode(node.Result, null, null);
emitter.Emit(opCode, node.Result);
}
/// <summary>
/// Emits the specified platform instruction.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="emitter">The emitter.</param>
internal override void EmitLegacy(InstructionNode node, X86CodeEmitter emitter)
{
LegacyOpCode opCode = ComputeOpCode(null, node.Operand1, node.Operand2);
emitter.Emit(opCode, node.Operand1, node.Operand2);
}
