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tde_m's avatar
tde_m
Icon for Occasional Contributor rankOccasional Contributor
8 years ago

Systolic array: channel indexing

Hello, I'm trying to write a basic example of a systolic array. It is essentially a chain of processing elements connected through channels: the first one read data from memory and inject it into th...
HRZ's avatar
HRZ
Icon for Frequent Contributor rankFrequent Contributor
8 years ago

You seem to be confusing replication of NDRange kernels with Single Work-item ones. The former is completely controlled by the compiler and you CANNOT use it to design a systolic array since you cannot customize the kernel copies. What the guide is referring to is replication of Single Work-item kernels where you can then use the get_compute_id() function to get a compile-time constant ID for each kernel copy and use it to customize each copy and its channel connections. In your case the get_global_id() returns a run-time variable value which cannot be used as channel index.