* You are not expected to understand this.
*/
if(rp->p_flag&SSWAP) {
rp->p_flag =& ~SSWAP;
aretu(u.u_ssav);
}
* You are not expected to understand this.
*/
if(rp->p_flag&SSWAP) {
rp->p_flag =& ~SSWAP;
aretu(u.u_ssav);
}
http://www.tom-yam.or.jp/2238/src/slp.c.html#line2238
It's what we'd use `&=` for nowadays. Note that the "B" language had these sorts of operators around the opposite way for how they appeared in "C" (e.g. read https://www.bell-labs.com/usr/dmr/www/kbman.html).
EDIT: Turns out that pre-standardized C is documented:
http://www.math.utah.edu/computing/compilers/c/Ritchie-CRefe...
Page 8 documents `=&`.