Functional Unit in NIOS

Question

Hi,

I am completely new to Altera FPGAs and I want to use NIOS for some of my work.

I was trying to configure some functional units on Qsys to no avail.

I am using Altera 14.1.0.186

I am aware of generating the preferred core with specified cache sizes etc. I am currently going through the NIOS II hardware development tutorial. I could not find the details on configurin come functional units in the document. Can I please now how to configure the following units.

Floating Point Unit
Floating Point Divider
Integer Multiplier
Integer Divider

Thank you

altera_forum · Answer

what is the device are you using currently?

Is this helps?

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/tt/tt_floating_point_custom_instructions.pdf

or

https://www.altera.com/content/dam/altera-www/global/en_us/others/literature/ug/ug_fph2.pdf

altera_forum · Answer

Integer Multiplier and Divider are available under the Arithmetic Instructions tab. If you are using e-core they are disabled.

Floating Point unit is available as custom instructions (separate IP). Go to library and find "Floating Point Hardware 2", add that and connect the custom instruction slaves to Nios custom instruction master interface.

altera_forum · Answer

Thank you for the responses. Need to make some clarification.

I have read in a research publication(2011) that it is possible to configure the floating point unit in the nios-f core without

introducing them as custom instructions. I was looking for this feature in the new version and noticed that it is only possible to

introduce floating point support as custom introductions. May be Altera has changed this feature over the years 2011 - 2015. could

you please clarify my understanding?

altera_forum · Answer

currently is behave in custom.

altera_forum · Answer

thanks a lot

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Functional Unit in NIOS

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