Re: PRF2 vs. 128bit

From: DarkLord (darklord@biohazard.qnis.net)
Date: 11/06/98


On Fri, 6 Nov 1998, Bryan Britt wrote:

>Can any one tell me the relative advantages and disadvantages to
>installing the 128-bit patch verses the PRF2 solution?  There seems to
>be a lot of talk on the list about problems regarding the 128-bit
>solution.

  It doesnt matter as long as the MSB can support the value...
  Like in the conventional case.. you have (1 << 31) or whatever..
  Technically your reg size is 32 bit.. but if you were to try to
  manipulate the flags in a way like adding them..  ex) PRF_FLAG1 |
  PRF_FLAG2  it would overflow the size of the variable.  Even if it was
  long you still couldnt get 128 bits out of it.

  If you say you have a problem with the 128 method..  try only going to
the  n-1  and see if that works.. like i just explained.

>
>We are thinking about seperating out our flags into several long
>variables and using a PRF2 type solution.  But we wanted to make sure
>that we did or did not want to do the 128.
>

  As long as it works.. it doesnt matter.. go with the fastest or one with
the least amount of code/flexibility.

  Whatever is easiest to do..  I used to go with the PRF2 method.. PRF3
even.. but it doesnt matter..

>
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ICQ: 386326
>Bryan L. Britt                                        501-327-8558
>Beltane Web Services, Conway, AR            http://www.beltane.com

  Social security number here is not a good idea ---------^


Email:  darklord@biohazard.qnis.net
URL  :  http://biohazard.qnis.net

B I O - H A Z A R D   I N D U S T R I E S    (c) 1994 -DarkLord


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