RI5CY: User Manual v4.2: p.clip* instructions imply ls2 unsigned rs1 signed for all

Created by: alfredoh1234

RI5CY: User Manual v4.2 section 14.3.3 does not clarify which arguments are signed and which are unsigned.

From pseudo code seems like ls2 is always unsigned and rs1 is always signed.

Clarification or annotation may be needed. Please clarify.