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

On Cortex-M4F microcontrollers: is fixed point math faster or floating point?

Hi,

I am using S32K14x controllers (Coretx-M4F). It has floating point math unit. I need to perform many mathematical operations as fast as possible. Which will be faster: fixed point q16 or fixed point q32 or single precision (32 bit) floating point?

Regards,

Pramod

Top replies

Andy Neil over 4 years ago +1 verified

Pramod Ranade said: On Cortex-M4F microcontrollers: is fixed point math faster ? Probably not: https://blogs.sw.siemens.com/embedded-software/2012/09/10/the-floating-point-argument/ why don't you...
Pramod Ranade over 4 years ago in reply to Andy Neil +1

Andy Neil said: An issue often noted with fixed point is that, aside from the actual calculations, it adds overhead & complexity to the code which needs to supply the input data and/or use the results...

Parents

0 Pramod Ranade over 4 years ago in reply to Ronan Synnott

Ronan Synnott said:
Hypothetically yes, however do your ISRs use the FPU registers?

Yes!
Cancel
Up 0 Down

Cancel

Reply

0 Pramod Ranade over 4 years ago in reply to Ronan Synnott

Ronan Synnott said:
Hypothetically yes, however do your ISRs use the FPU registers?

Yes!
Cancel
Up 0 Down

Cancel

Children

No data