Please read this page from the main YASEP interface
version 2014-02-12

GET : GET the value of a Special Register

This instruction reads the contents of the Special Register pointed by the value of the first source register, or by the value of the immediate data field (Imm4/Imm6/Imm16) and writes it into the destination register (SND ou DST).

This instruction is the reverse of the PUT instruction.