> do you emulate the actual sub-operations the FPGA does? Yes. It's an emulator.... | Hacker News

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kjeetgill on Aug 15, 2018 | parent | context | favorite | on: Why Use an FPGA Instead of a CPU or GPU?

> do you emulate the actual sub-operations the FPGA does?

Yes. It's an emulator.

> ... is going to have to write an implementation in C that emulates the hardware.

Makes sense. It's an emulator.

> ... and it'll run dog slow on the CPU compared to using the native functions.

Isn't that to be expected? It's an emulator. This isn't like games where it just has to look close. If it's a dev tool for testing correctness, exactness matters.

shriver on Aug 16, 2018 [–]

Well last time I looked, the answer to question 1 for the Intel OpenCL SDK is actually no.

And while yes, it's expected to be slow compared to the native functions, that's not the problem. It's slow compared to simulation.

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