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Date: Sun, 28 Jun 1998 22:49:59 +0200
From: Archee/CoNTRACT <soltesz AT hotmail DOT com>
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To: lubaldo AT adinet DOT com DOT uy
CC: djgpp AT delorie DOT com
Subject: Re: 64k demo
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Another topic:

When you use 2d arrays, the speed depends of the MAX INDEX of the first
dimension of the array:


A>
char ad[200][200];
long index1,index2;


asm:

imul edi,[_index1],200
add edi,[_index2]
mov al,[edi+_ad]


B>
IF you smart:
char ad[200][256];
long index1,index2;

asm:
mov edi,[_index1]
shl edi,8
add edi,[_index2]
mov al,[edi+_ad]


SHL is MUCH faster than multiple !