.machine ppc
        .globl  _main

        .macro  DEFBIN
                $0=$1<<7|$2<<6|$3<<5|$4<<4|$5<<3|$6<<2|$7<<1|$8
        .endmacro

DEFBIN BINNUM,1,1,1,1,1,1,1,1
        
_main:
        li      r10, BINNUM
        ...