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JSYOO's avatar
JSYOO
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11 months ago

II is an approximation due to the following stallable instructions

Hi I am analyzing the report from oneAPI FPGA report generation. I am currently facing Compiler failed to schedule this loop with smaller II due to memory dependency So I came back to a simple v...
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whitepau_altera's avatar
whitepau_altera
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11 months ago

Hello!

You can learn about this in the loop_initiation_interval tutorial and the kernel_args_restrict tutorial.

Basically, you need to tell the compiler that the kernel arguments don't alias with the kernel_args_restrict attribute:

struct FunctorKernel {
   // -------------------------------------------
   //         Kernel interface definition.
   // -------------------------------------------
   
   [[intel::kernel_args_restrict]]
   void operator()() const {
      // ----------------------------------------
      //       Kernel code implementation.
      // ----------------------------------------
   }
};