You need to write your assembly to handle interrupts properly. For example, you need to make sure that the stack pointer is double-word aligned at any time where interrupts are enabled. That means you could not do two "pushes" in a row to the stack. Rather you would need to increment the stack by 2 words and then use an indexed address mode to write the words into the space you just allocated.
If you follow the guidelines in the C Compiler Guide *precisely* then you'll find many of these things are taken care of. If you're using the SPLOOP hardware instead of writing software-pipelined loops then that will allow you to have interruptible code. Brad > -----Original Message----- > From: davinci-linux-open-source-boun...@linux.davincidsp.com > [mailto:davinci-linux-open-source-boun...@linux.davincidsp.com] On Behalf > Of Zuber > Sent: Friday, February 27, 2009 12:21 AM > To: davinci-linux-open-source@linux.davincidsp.com > Subject: Hand written assembly code > > Hi All, > > I am working on video codec optimization. In this,to get more > optimization i have converted some of c functions in to the assembly. > Now my question is, will this hand written assembly creates problems in > terms of interrupt handling. > Because i heard from some one that hand written assembly would not > handle interrupts properly. > So can anybody explain or confirm me about such issue or any other > suggestion related to this will help me to go further. > > -- > Regards, > Zuber Saiyed > Embedded Engineer > e-Infochips Ltd. > 11/A-B, Chandra Colony, Off C.G. Road, > Ellisbridge, Ahmedabad - 380006 > Telephone :- 079-2656 3705 Ext :- 126 > www.einfochips.com > > -- > _____________________________________________________________________ > Disclaimer: This e-mail message and all attachments transmitted with it > are intended solely for the use of the addressee and may contain legally > privileged and confidential information. If the reader of this message > is not the intended recipient, or an employee or agent responsible for > delivering this message to the intended recipient, you are hereby > notified that any dissemination, distribution, copying, or other use of > this message or its attachments is strictly prohibited. If you have > received this message in error, please notify the sender immediately by > replying to this message and please delete it from your computer. Any > views expressed in this message are those of the individual sender > unless otherwise stated.Company has taken enough precautions to prevent > the spread of viruses. However the company accepts no liability for any > damage caused by any virus transmitted by this email. > __________________________________________________________________________ > > > _______________________________________________ > Davinci-linux-open-source mailing list > Davinci-linux-open-source@linux.davincidsp.com > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
