This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Can Floating Point Unit(FPU) in cortexA9 processor raise an exception?

Based on ARM documents there is no exception ID for FPU (CortexA9) and just FPU instructions set exception flags in Floating-Point Status and Control Register (FPSCR). Is there a way to use these flags to raise an exception in the processor?

Top replies

daith over 7 years ago +1 verified

You mean can one set up the environment so floating point zero divide automatically causes an interrupt routine to be called? I'm afraid not. One needs to check the result of a series of operations or...
Peter Rielly over 7 years ago +1 verified

Not on the A9 as it implements VFPv3 which has a trapless exception model. There is a variant VPF3U that does support generating Arm exceptions based on FP exceptions but this is not available on A9. ...

Parents

0 Yeli over 7 years ago in reply to daith

Thanks for your reply.

I really need to know which instruction causes the exception in our project. Is there a way to find out these kind of information.
Cancel
Up 0 Down

Cancel

Reply

0 Yeli over 7 years ago in reply to daith

Thanks for your reply.

I really need to know which instruction causes the exception in our project. Is there a way to find out these kind of information.
Cancel
Up 0 Down

Cancel

Children

No data