Public bug reported:
VAX780 depends on signed overflow (which is an undefined behaviour), and
gcc/clang optimization breaks it and the simulator doesn't work at all.
The code is virtually unmaintained (and really unmaintainable..) so it'd be
hard to do a proper fix, but there is a simple workaround - disabling the
specific optimization. Patch attached.
** Affects: simh (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1852711
Title:
vax780 problem with integer overflow
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