Assembly RSS Assembly RSS

Shifts vs Additions

Reply

•
•
Join Date: Feb 2006
Posts: 1
Reputation: nectodn is an unknown quantity at this point 
Solved Threads: 0
nectodn nectodn is offline Offline
Newbie Poster

Shifts vs Additions

 
0
  #1
Feb 12th, 2006
I was told that shifts were faster then additions but the pdf
"How to optimize for the Pentium® microprocessors" from
http://www.agner.org/assem/ says that shifts should be avoided on
Pentinum 4 and additions should be used instead. Which is right?
Reply With Quote Quick reply to this message  
•
•
Join Date: Sep 2004
Posts: 7,567
Reputation: Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute Narue has a reputation beyond repute 
Solved Threads: 707
Team Colleague
Narue's Avatar
Narue Narue is offline Offline
Code Goddess

Re: Shifts vs Additions

 
0
  #2
Mar 7th, 2006
>Which is right?
Both. Any decent processor will show that shifts are faster, but the Pentium 4 is gimped in this case.
I'm here to prove you wrong.
Reply With Quote Quick reply to this message  
Reply

Quick Reply to Thread
This thread is more than three months old.
Perhaps start a new thread instead?
•
•
•
•
•
•
•
•
Message:
•
•
•
•



Similar Threads
Other Threads in the Assembly Forum
Thread Tools Search this Thread



3d 68hc11 6811 adress array asm assembler assembly boot bootloader buffer compression cursor debug directory division dos draw emulator endtask file int10h integer interrupt language loop nohau osdevelopment print program range read remainder shape string text tsr x86
About Us | Contact Us | Advertise | DaniWeb | Acceptable Use Policy | RSS Feed

©2003 - 2009 DaniWeb® LLC