GNU Arm Embedded Toolchain

Floating point rounding

Asked by Adrian Gin

I'd like to be able to set the IEE754 rounding method doing certain calculations.

How is it possible to use the fesetround and functions described in fenv.h? I can't seem to get it to work on a M4 FPU

I wonder how it is possible to use the features and functions in https://www.gnu.org/software/libc/manual/html_node/Rounding.html

Thanks

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Andre Vieira (andre-simoesdiasvieira) said : 		#1

Hi Adrian,

There is currently no fenv implementation for ARM in newlib, the C library we use for the GNU ARM Embedded Toolchain.

Regards,
Andre

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