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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

Are you using Floating Point Hardware 2?

I think the CI only support 18 Floating point operations, refer to table 6 of https://www.altera.com/content/dam/altera-www/global/en_us/others/literature/ug/ug_fph2.pdf)

Trigonometry operations are not part of the 18 floating point operations and as such the performance is not good.

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Trigonometric functions with FPU

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