[Info-vax] Dave Cutler, Prism, DEC, Microsoft, etc.
Bob Koehler
koehler at eisner.nospam.encompasserve.org
Tue Dec 1 09:27:05 EST 2009
In article <fdWdnb4rXYpO_onWnZ2dnUVZ_q-dnZ2d at earthlink.com>, "John Reagan" <johnrreagan at earthlink.net> writes:
>
> On the VAX, the compilers (at least the Pascal compiler and I believe the
> Fortran compiler where I stole the code from) align targets of branches and
> routine entry points on longword (or quadword boundaries, I forget which).
> We pad with NOPs. It made branches and CALLs *MUCH* faster.
IIRC, that Fortran compiler came out at about the same time as the VAX
6000 series (first NVAX?). And I was left wondering just how fast my
MV II was running though all those NOPs on conditional branches not
taken.
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