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Altera_Forum's avatar
Altera_Forum
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20 years ago

NIOSII supports floating point multiplier ?

hi group,

i am new to NIOS II . Cud any one tell me does NIOS II supports floating point multiplication?

if yes how could one use it and control it through c program using nios II.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    Yes, but not directly. Go to the IP section "Post your own IP" at the bottom of the main page and look for "Nios II floating point custom instructions". Works great....but....read on

    I tried it on a 1C3-144. First used it on the NIOSII-e and saw a real improvement over the emulated code. But when I ran the code on a NIOSII-f core without the custom instructions it flew, much faster than the -e core and custom instruction (but then the -e core is not that fast. Unfortunately there was not enough space to implement a fast core plus the custom instructions. Bottom line is that if you think you are going to get away with a -e core with hw float then it is still better to use the fast core with emulation.

    VictorS
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    hi victor,

    Thanks a lot for the reply. I will check the material .... any how thanks again.