as: PRU Relocations

 
 9.36.3 PRU Machine Relocations
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 '%pmem(EXPRESSION)'
      Convert EXPRESSION from byte-address to a word-address.  In other
      words, shift right by two.
 
 '%label(EXPRESSION)'
      Mark the given operand as a label.  This is useful if you need to
      jump to a label that matches a register name.
 
           r1:
               jmp r1		; Will jump to register R1
               jmp %label(r1)	; Will jump to label r1