Hexadecimel constants are treated as unsigned numbers

[RatkoFri]

Hexadecimal constants are treated as unsigned numbers, which prevents users to run this instruction:

addi x2, x0, 0xAFF

Although the hexadecimal value is 12bit, the Ripes will interpret it as an unsigned number which is out of range for a 12bit signed number (2nd complement). The Ripes will prevent this code for executing