Self modifying code, lambda calculus - Re: ENIAC programming
cclist at sydex.com
Thu Sep 17 16:09:44 CDT 2015
> On Sep 17, 2015, at 2:56 PM, dwight <dkelvey at hotmail.com> wrote:
> What is the definition of self modifying? Is it changing an
> instruction to execute in the thread to be run? How about adding or
> subtracting something to be done in an execution queue?
What he said. In the narrow viewpoint, "self-modifying" could be
construed as "altering the order of instruction execution based on
computational results "
I'm sure that there are those who would consider the "Execute"
instruction on the S/360 machine (and lots of others) to be
Others would consider only those cases where executed code is actually
modified actively (e.g. doing I/O to a variable port number on an 8080.
The 8080 has only two I/O instructions (IN and OUT); both take an
immediate (literal) operand).
The difference between the three cases, is, to my mind inconsequential.
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