C2H Compiler Concepts
The C2H Compiler Operates at the Function Level
Code you want to accelerate must be expressed as an individual C
function. The C2H Compiler converts all code within and below the
chosen function to a hardware accelerator block. If the function you are
accelerating calls a subfunction, the C2H Compiler also converts the
subfunction to a hardware accelerator. Therefore, you must be careful that
subfunctions are also good candidates for C2H acceleration.
If the code you want to accelerate is not isolated in a separate function, a
good practice is to partition the function to separate the critical section
into its own function. The resulting hardware accelerator then replaces
only processor-intensive tasks, rather than setup or control tasks which
the processor can implement efficiently.
1–8
Nios II C2H Compiler User Guide
9.1
Altera Corporation
November 2009
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