l63 130 src/dps8/dps8_math128.c uint64_t l63 = al63 + bl63; // low 63 bits of a + b, with carry into bit 64 l63 131 src/dps8/dps8_math128.c uint64_t c63 = l63 & SIGN64; // the carry out of low 63 a + b l63 132 src/dps8/dps8_math128.c l63 &= MASK63; // lose the carry bit l63 140 src/dps8/dps8_math128.c l64 |= l63; // put low 63 bits in