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

Hi Pramod,

Further to Andy's excellent reply above, the CPU has a cycle count register you can use to easily compare code performance
https://developer.arm.com/documentation/ddi0439/b/Data-Watchpoint-and-Trace-Unit/DWT-Programmers-Model
(enabled by bit 0 o DWT_CTRL). Most development tools (such as Keil MDK) have this integrated into the environment.

By mathematical operations do you mean low level operations (MAC etc) or higher level operations (FFT or similar). The CMSIS DSP library contains a number of optimized routines (with and without VFP) to further help you analyze.
www.keil.com/.../index.html

Hi Pramod,

Further to Andy's excellent reply above, the CPU has a cycle count register you can use to easily compare code performance
https://developer.arm.com/documentation/ddi0439/b/Data-Watchpoint-and-Trace-Unit/DWT-Programmers-Model
(enabled by bit 0 o DWT_CTRL). Most development tools (such as Keil MDK) have this integrated into the environment.

By mathematical operations do you mean low level operations (MAC etc) or higher level operations (FFT or similar). The CMSIS DSP library contains a number of optimized routines (with and without VFP) to further help you analyze.
www.keil.com/.../index.html

Ronan Synnott said:

By mathematical operations do you mean low level operations (MAC etc) or higher level operations (FFT or similar)

Low level operations, to start with. May evaluate higher math functions later (e.g. matrix multiplication)