collapseos/blk/459

CODE _find ( cur w -- a f ) 2 chkPS,
    SI POPx, ( w ) DI POPx, ( cur )
    CH CH XORrr, CL [SI] MOVr[], ( CX -> strlen )
    SI INCx, ( first char ) AX AX XORxx, ( initial prev )
    BEGIN, ( loop )
        DI AX SUBxx, ( jump to prev wordref )
        AL [DI] -1 MOVr[]+, 0x7f ANDALi, ( strlen )
        CL AL CMPrr, IFZ, ( same len )
            SI PUSHx, DI PUSHx, CX PUSHx, ( --> lvl 3 )
            3 ADDALi, ( header ) AH AH XORrr, DI AX SUBxx,
            CLD, REPZ, CMPSB,
            CX POPx, DI POPx, SI POPx, ( <-- lvl 3 )
            IFZ, DI PUSHx, AX 1 MOVxI, AX PUSHx,
                JMPn, lblnext @ RPCn, THEN,
        THEN,
    DI 3 SUBxi, AX [DI] MOVx[], ( prev ) AX AX ORxx,  ( cont. )