RxIn registers have REG_OUT flag set.

[Rot127]

Rx and RxIn are set separately in hi->ops although they are the same register (Rx registers are used for input and output).
But the register attribute for RxIn is set to HEX_OP_REG_OUT although it is an "in" register.

The attribute is falsely assigned here:

rz-hexagon/InstructionTemplate.py

Lines 217 to 218 in 7363e59

	if op.is_out_operand:
	code += "hi->ops[{}].attr |= HEX_OP_REG_OUT;\n".format(op.syntax_index)

Currently the attributes are not used. So there is not much damage.