Misc/abrash-black-book
Watch
1
0
Fork
You've already forked abrash-black-book
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Deduped images

Browse source
This commit is contained in:
James Gregory 2013-12-30 12:25:34 +11:00
commit 9e52de9586
233 changed files with 128 additions and 128 deletions
Download patch file Download diff file Expand all files Collapse all files

2
02-01.html
View file

@ -59,7 +59,7 @@ LoopTop:
<!-- END CODE SNIP //-->
<P>Now, it&#146;s hard to write code that&#146;s much faster than seven instructions, only one of which accesses memory, and most programmers would have called it a day at this point. Still, something bothered me, so I spent a bit of time going over the code again. Suddenly, the answer struck me&#151;the code was rotating each bit into place separately, so that a multibit rotation was being performed every time through the loop, for a total of four separate time-consuming multibit rotations!
</P>
<TABLE WIDTH="100%"><TD WIDTH="5%" VALIGN="TOP"><IMG SRC="images/02-01i.jpg"><TD WIDTH="95%"><SMALL><I>While the instructions themselves were individually optimized, the overall approach did not make the best possible use of the instructions.</I></SMALL>
<TABLE WIDTH="100%"><TD WIDTH="5%" VALIGN="TOP"><IMG SRC="images/i.jpg"><TD WIDTH="95%"><SMALL><I>While the instructions themselves were individually optimized, the overall approach did not make the best possible use of the instructions.</I></SMALL>
</TABLE>
<P>I changed the code to the following:
</P>