Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Floating Point Custom Instructions

How can I use fp custom instructions in a multiprocessor system? May I add this resource to just one processor, or I may do that for each one? (All the cpus make heavy use of fp operations)

I tryed to add the fpoint CI to each cpu (with differents labels) however the SOPC Builder Generator displays the message:

multiple masters (cpu_0/custom_instruction_master,cpu_1/custom_instruction_master) master fpoint_cpu_1/s1

I've added it in the cpu_0, but when I added it in the cpu_1 the cpu_0 now contains another instance of the CI which referes to the fp CI from cpu_1.

Thanks a lot!

1 Reply

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

    People, I`ve opened an Altera Service Request and received the following reply:

    "This is a bug of SOPC Builder, I have duplicate it on my PC. I also have reported this bug to our R&D department. They will fix it in next version. Thanks."

    We can just wait now, since fp custom instrucrtion is a really great tool.

    PS: I'm using Quartus 6.1