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Honored Contributor

10 years ago

Trigonometric functions with FPU

Hello, I'm trying to reduce the latency of my arithmetic operations. For that purpose i The CUSTOM FPU INSTRUCTION to my Nios. I've enabled HW and DIV at NIOS2-F. Using this Custom Instructi...

Altera_Forum

Honored Contributor

10 years ago

Found somewhere regarding custom instruction: http://www.alterawiki.com/wiki/custom_instructions

Also this:http://www.alterawiki.com/wiki/single-precision_-mcustom-*_options

I think you need to define the -mcusom- GCC flags.

-mcustom-fcoss=1

-mcustom-fatans=2

-mcustom-fsins=3

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Trigonometric functions with FPU

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