[Info-vax] How much of VMS is still in MACRO-32?

[David Jones]

On Monday, May 31, 2021 at 9:07:30 AM UTC-4, Simon Clubley wrote:
> Is there any self-modifying code in VMS ? (I hope the answer to that 
> is no, BTW. :-))

Back in the VAX days, I had an image processing program that would take
a convolution matrix and image array size and return the address of a
dynamically created procedure to filter an input image. The matrix was
analyzed to eliminate the zero multiplies in the resulting instructions (I
can't remember if it optimized the 1.0 multiplies as well).

It wasn't exactly self-modifying, but the procedure was in read/write
memory.