|Machine code parsers (entropy of machine code) firstname.lastname@example.org (Andrey I. Savov) (1996-11-24)|
|Re: Machine code parsers (entropy of machine code) email@example.com (1996-11-26)|
|Re: Machine code parsers (entropy of machine code) firstname.lastname@example.org (Andrey I. Savov) (1996-12-01)|
|Re: Machine code parsers (entropy of machine code) email@example.com (1996-12-03)|
|Re: Machine code parsers (entropy of machine code) firstname.lastname@example.org (1996-12-07)|
|From:||email@example.com (Derek M Jones)|
|Date:||26 Nov 1996 20:25:00 -0500|
|Organization:||Knowledge Software Ltd|
> Does anyone know what is the usual entropy of the following:
> 1. Assembly code generated by widely used compilers for Pentium and PowerPC
> platforms. Different compiler optimization options that may affect this
> parameter are consideration. For Pentium only 32-bit code is interesting.
> 2. Code parts in the operating system which are likely to be written in
> Assembly (not generated by compiler).
I think that perhaps we can talk about the entropy of instruction
sets. But the code egnerated by different compilers?
I once did a little experiment. I measured how well gzip compressed
executable programs for a vareity of machines. There did seem to
be some correlation between compression ratios for the same programs,
compiled for different cpu's.
Do you think optmised code will have a higher or lower entropy?
Derek M Jones tel: +44 (0) 1252 520 667
Knowledge Software Ltd email: firstname.lastname@example.org
Applications Standards Conformance Testing http://www.knosof.co.uk
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