public static void Fcsel_S(ArmEmitterContext context)
{
OpCodeSimdFcond op = (OpCodeSimdFcond)context.CurrOp;
Operand lblTrue = Label();
Operand lblEnd = Label();
Operand isTrue = InstEmitFlowHelper.GetCondTrue(context, op.Cond);
context.BranchIfTrue(lblTrue, isTrue);
OperandType type = op.Size == 0 ? OperandType.FP32 : OperandType.FP64;
Operand me = context.VectorExtract(type, GetVec(op.Rm), 0);
context.Copy(GetVec(op.Rd), context.VectorInsert(context.VectorZero(), me, 0));
context.Branch(lblEnd);
context.MarkLabel(lblTrue);
Operand ne = context.VectorExtract(type, GetVec(op.Rn), 0);
context.Copy(GetVec(op.Rd), context.VectorInsert(context.VectorZero(), ne, 0));
context.MarkLabel(lblEnd);
}
public static void EmitBxWritePc(ArmEmitterContext context, Operand pc, int sourceRegister = 0)
{
bool isReturn = sourceRegister == RegisterAlias.Aarch32Lr || IsA32Return(context);
Operand mode = context.BitwiseAnd(pc, Const(1));
SetFlag(context, PState.TFlag, mode);
Operand addr = context.ConditionalSelect(mode, context.BitwiseAnd(pc, Const(~1)), context.BitwiseAnd(pc, Const(~3)));
InstEmitFlowHelper.EmitVirtualJump(context, addr, isReturn);
}
private static void EmitAluWritePc(ArmEmitterContext context, Operand value)
{
Debug.Assert(value.Type == OperandType.I32);
if (IsThumb(context.CurrOp))
{
context.StoreToContext();
bool isReturn = IsA32Return(context);
Operand addr = context.BitwiseOr(value, Const(1));
InstEmitFlowHelper.EmitVirtualJump(context, addr, isReturn);
}
else
{
EmitBxWritePc(context, value);
}
}
private static void EmitAluWritePc(ArmEmitterContext context, Operand value)
{
Debug.Assert(value.Type == OperandType.I32);
if (((OpCode32)context.CurrOp).IsThumb())
{
bool isReturn = IsA32Return(context);
if (!isReturn)
{
context.StoreToContext();
}
InstEmitFlowHelper.EmitVirtualJump(context, value, isReturn);
}
else
{
EmitBxWritePc(context, value);
}
}
private static void EmitFccmpOrFccmpe(ArmEmitterContext context, bool signalNaNs)
{
OpCodeSimdFcond op = (OpCodeSimdFcond)context.CurrOp;
Operand lblTrue = Label();
Operand lblEnd = Label();
context.BranchIfTrue(lblTrue, InstEmitFlowHelper.GetCondTrue(context, op.Cond));
EmitSetNzcv(context, op.Nzcv);
context.Branch(lblEnd);
context.MarkLabel(lblTrue);
EmitFcmpOrFcmpe(context, signalNaNs);
context.MarkLabel(lblEnd);
}
private static void Blx(ArmEmitterContext context, bool x)
{
IOpCode32BImm op = (IOpCode32BImm)context.CurrOp;
uint pc = op.GetPc();
bool isThumb = IsThumb(context.CurrOp);
uint currentPc = isThumb
? op.GetPc() | 1
: op.GetPc() - 4;
SetIntOrSP(context, GetBankedRegisterAlias(context.Mode, RegisterAlias.Aarch32Lr), Const(currentPc));
// If x is true, then this is a branch with link and exchange.
// In this case we need to swap the mode between Arm <-> Thumb.
if (x)
{
SetFlag(context, PState.TFlag, Const(isThumb ? 0 : 1));
}
InstEmitFlowHelper.EmitCall(context, (ulong)op.Immediate);
}