About using AMMCLIB

[578294688]

Hello,engineers!

I recently had a problem with AMMCLIB math library. The version of AMMCLIB math library is MPC577xK_AMMCLIB_v1.1.9 - s32ds_ppc, MCU is S32R274.

I tested the sine function, and I found that  GFLIB_Sin_FLT is OK, but  GFLIB_Sin_F32 and  GFLIB_Sin_F16 are not OK when I use MPC577xK_AMMCLIB.a in e200z7.If I want to use the GFLIB_Sin_F32 function, what do I need to do?

Another, when I use MPC577xK_AMMCLIB.a in e200z4, I found that the three functions are all OK, but GFLIB_Sin_F32 and GFLIB_Sin_F16 running time is more than GFLIB_Sin_FLT, I can't understand that because I think integral types should be less computation-intensive than floating point types.

What is the answer to the above question? 

Or are there other ways to improve software performance?

I am looking forward to your reply!

Best wishes

[stanish]

Hello,

I assume your goal is to improve speed performance.

as a general suggestion in order I'd recommend to enable

•  acceleration features such as branch target buffer, Cache, memory WaitStates, HW floating point, SPT...
• enable compiler optimizations, use intrinsics for critical code, place critical code into RAM
• select better performance compiler (such as GHS)

Regarding AMMCLIB issues I'd first recommend you to update the library which is v1.1.18

Automotive Math and Motor Control Library Set | NXP 

and check the performance.

Hope it helps.

Stan