etbcopy
etbcopy(src, dst, len);
etbcopy(src, dst, len);
etbcopy(fb, fb - (count * ip->cols),
etbcopy(fb, fb + (count * ip->cols),
etbcopy(fb+sx, fb+sx+count, ip->cols - (sx + count));
etbcopy(fb+sx, fb+sx-count, ip->cols - sx);
etbcopy(fb, fb - (count * ip->cols),
etbcopy(fb, fb + (count * ip->cols),
etbcopy(fb+sx, fb+sx+count, ip->cols - (sx + count));
etbcopy(fb+sx, fb+sx-count, ip->cols - sx);
static void etbcopy(const volatile void *src, volatile void *dst, size_t len);