Sgnstore

Takes a memory location and sets its value to 1,0, or -1 depending if the memory location is positive or negative or zero.

examples:

Given 10 .up store

.up sgnstore same as *.up sgn .up store is equal to 1

Given 0 .up store

.up sgnstore same as *.up sgn .up store is equal to 0

Given -1 .up store

.up sgnstore same as *.up sgn .up store is equal to -1