Re: is Vax addressing sane today

John Levine <johnl@taugh.com> schrieb:

It appears that Anton Ertl <anton@mips.complang.tuwien.ac.at> said:

The future of programming languages is type safe with checks, you need to
get on that bandwagon early.

>
MIPS got on that bandwagon early.  It has, e.g., add (which traps on
signed overflow) in addition to addu (which performs modulo
arithmetic).  It has been abandoned and replaced by RISC-V several
years ago.

>
S/360 had signed and unsigned adds in the 1960s, with optional
trapping for signed overflow. OS/360 let you catch the traps and z
still does but it is not my impression that many programs did or do.

With trapping, I understand.  Without trapping - what is the
difference on a two's complement machine?