Hi,
My customer encountered a warning when building the project. The warning is as follow:
advice: (Performance) EABI double
precision is 64-bits as opposed to 32-bits for COFF. Consider
changing doubles to floats for improved performance in FPU32-mode.
They set float_support=fpu32 in compile configuration of Makefile.
For example： sint32_t is long (data type)
sint32_t PWM_frequency；
PWM_frequency = _IQ10(MAX_FREQ);
when MAX_FREQ=72345，there is no warning.
sint32_t PWM_frequency；
sint32_t abc;
PWM_frequency = _IQ10(abc);
when abc=72345，there is a warning.
sint32_t PWM_frequency；
sint32_t abc;
PWM_frequency = abc<<10;
when abc=72345，there is no warning.
The question is why there is a warning? How to eliminate the warning? Could you provide user guide of EABI and COFF?
Thanks a lot!
