REVERSE64
REVERSE64(context->state[j],context->state[j]);
REVERSE64(context->bitcount,context->bitcount);
REVERSE64(*data++, W512[j]); \
REVERSE64(*data++, W512[j]);
REVERSE64(context->bitcount[0],context->bitcount[0]);
REVERSE64(context->bitcount[1],context->bitcount[1]);
REVERSE64(context->state[j],context->state[j]);