public static void Bfc(ArmEmitterContext context)
{
OpCode32AluBf op = (OpCode32AluBf)context.CurrOp;
Operand d = GetIntA32(context, op.Rd);
Operand res = context.BitwiseAnd(d, Const(~op.DestMask));
SetIntA32(context, op.Rd, res);
}
public static void Ubfx(ArmEmitterContext context)
{
OpCode32AluBf op = (OpCode32AluBf)context.CurrOp;
var msb = op.Lsb + op.Msb; // For this instruction, the msb is actually a width.
Operand n = GetIntA32(context, op.Rn);
Operand res = context.ShiftRightUI(context.ShiftLeft(n, Const(31 - msb)), Const(31 - op.Msb));
SetIntA32(context, op.Rd, res);
}
public static void Bfi(ArmEmitterContext context)
{
OpCode32AluBf op = (OpCode32AluBf)context.CurrOp;
Operand n = GetIntA32(context, op.Rn);
Operand d = GetIntA32(context, op.Rd);
Operand part = context.BitwiseAnd(n, Const(op.SourceMask));
if (op.Lsb != 0)
{
part = context.ShiftLeft(part, Const(op.Lsb));
}
Operand res = context.BitwiseAnd(d, Const(~op.DestMask));
res = context.BitwiseOr(res, context.BitwiseAnd(part, Const(op.DestMask)));
SetIntA32(context, op.Rd, res);
}
