MASKBITS          326 src/dps8/dps8_utils.h     word36 result = (x & ~ mask) | ((val&MASKBITS(n)) << (36 - p - n));
MASKBITS          470 src/dps8/dps8_utils.h     * x = (* x & ~mask) | ((val & MASKBITS (n)) << (36 - p - n));