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From: edw@IUS1.CS.CMU.EDU (Eddie Wyatt)
Newsgroups: comp.arch
Subject: Re: RISC is a nasty no-no!
Message-ID: <998@PT.CS.CMU.EDU>
Date: 29 Feb 88 19:15:12 GMT
References: <179@wsccs.UUCP: <696@nuchat.UUCP> <284@scdpyr.UUCP> <11199@duke.cs.duke.edu>
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Organization: Carnegie-Mellon University, CS/RI
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> 
> Multiplication is not necessary to access 2-D arrays if the array is
> set up like most arrays in C, where each row is a typical vector and
> the 2-D array is just a vector of pointers to each row vector.

EXCUSE ME, but when I declare an array to be an n by m matrix in
C (float foo[n][m]) I get a contiguous block of memory.  The
representation IS NOT row-vector or column-vector.  So when I access
index number i,j someone has to perform the calculation 
base + sizeof(type)*(i*m+j).



-- 

Eddie Wyatt 				e-mail: edw@ius1.cs.cmu.edu