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Floating Point Custom Instructions

Altera_Forum
Honored Contributor II
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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!
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Altera_Forum
Honored Contributor II
360 Views

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
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