IPB

Welcome Guest ( Log In | Register )

Q: floating-point, losslessness from http://www.wavpack.com/technical.
Porcus
post Feb 17 2012, 17:00
Post #1





Group: Members
Posts: 1842
Joined: 30-November 06
Member No.: 38207



I quote:
QUOTE
I have decided to not use any floating-point arithmetic in WavPack's data path because I believe that integer operations are less susceptible to subtle chip to chip variations that could corrupt the lossless nature of the compression, the recent Pentium floating point bug being a blatant example of this.


Is this obsoleted, in the sense that Bryant has found that one can now trust floating-point arithmetic, or does it mean that even floating-point .WV files are created using fixed-point arithmetic, without any use of the processor's floating-point internals?


(Edited for clarification.)

This post has been edited by Porcus: Feb 17 2012, 17:37


--------------------
One day in the Year of the Fox came a time remembered well
Go to the top of the page
+Quote Post
 
Start new topic
Replies
pdq
post Feb 17 2012, 17:29
Post #2





Group: Members
Posts: 3402
Joined: 1-September 05
From: SE Pennsylvania
Member No.: 24233



This Wikipedia article describes the 1994 Pentium floating point divide bug. I have not heard of any such bug since then.
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 16th September 2014 - 21:28