Floating point arithmatic in interrupt routine mpc555

[Prathamesh Patki]

Hi,
   
  How can i use floating point arithmatic in interrupt routine of mpc 555?
   
  - Pat

       
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[Dees Randy-rsaf30]

in your exception handler, before making the exception recoverable
(MSR[RI]) , save all of the floating point registers (or at least all
registers you plan to use), make exception recoverable, enable floating
point, use floating point. then before exiting the exception handler,
make exception not recoverable, restore floating point registers, return
from exception.

________________________________

From: MPC500@... [mailto:MPC500@...] On Behalf
Of prathamesh patki
Sent: Thursday, October 11, 2007 8:54 AM
To: MPC500@...
Subject: [MPC500] Floating point arithmatic in interrupt routine mpc555



Hi,

How can i use floating point arithmatic in interrupt routine of mpc 555?

- Pat

.
 
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sgId=3911/stime=1192110839/nc1=3848607/nc2=4507179/nc3=4025338>
 


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[Guillaume "Pÿffffe9ron"]

Hi,
   
  It is necessary if you want to save FP registers into the stack. Do not forget to set MSR[FP]. This FPU enable bit is automatically cleared when an interrupt is taken.
   
  Regards,
   
  Guillaume

prathamesh patki <p_pratham@...> wrote:
          Hi,

How can i use floating point arithmatic in interrupt routine of mpc 555?

- Pat

---------------------------------
Moody friends. Drama queens. Your life? Nope! - their life, your story.
Play Sims Stories at Yahoo! Games.

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