smsup            3171 src/decNumber/decNumber.c     const Unit *smsup, *s;                   // work
smsup            3176 src/decNumber/decNumber.c     smsup=src->lsu+D2U(src->digits);         // -> source msu+1
smsup            3177 src/decNumber/decNumber.c     for (s=src->lsu+1; s<smsup; s++, d++) *d=*s;