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Altera_Forum
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12 years ago

How to explicitly use BRAMs

Is there any way to explicitly use BRAMs for the synthesized OpenCL kernel? I'm aware that __local memory will be implemented with BRAMs, but I was also interested in squeezing extra performance from...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

How is __constant implemented? I remembered I had a design earlier this year which read from a ROM-stored LUT, while this was good enough for 2005 FPGAs, for current ones it's not. In the end we had to synthesize the ROMs to registers due to the negative impact on performance (we got some 30% faster critical path). Is the __constant memory space synthesized?

Regarding __local memory, the visibility scope of buffers declared with __local render a normal BRAM usage of __local buffers tremendously limited.

I'm staying tuned :)