Re: while trying to learn pack
- From: jwkrahn@xxxxxxx (John W. Krahn)
- Date: Fri, 25 Jul 2008 15:57:01 -0700
Richard Lee wrote:
I am begining to read bit of low level(assembly) book to just gain some knoweldge on inner workings of memory.
My quesiton is, if machine is 32 bit, even if it's accessing string 'A', it will have to fetch 32 bit (instead of 8 bit that requires to make that letter A ) ?
It depends on the CPU. An Intel compatible CPU has instructions to access 8 bit values from memory but some CPUs can only access 32 bit aligned data.
I know this is not a mailing list for this but i figure since it's closely related to pack, i thought someone would clarify for me.
It is not really related to pack() as pack() is a high level function that can hide the details of the CPUs addressing problems.
I am reading "step by step assembly language"... I am not sure i will read the whole thing but i just want to get better inner working of memory as my c book didn't do enough justice.
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
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