Jit compile

[calad0i]

Description

Allow jit compiling vivado/vitis (and quartus, but sometimes slower) cpp code. Compilation time may be reduced or increased, depending on the exact configuration (reduced if weights are not embedded in header in general, and vice versa).

Unfortunately, due to some confliction (probably related to macros), one isolated process is required for each jitted-model to separate the runtime. This introduces some overhead in runtime and ram usage.

Setting HLS4ML_USE_JIT=1 in envvar will enable jit compilation for supported models by default.

Setting EXTRA_CLING_ARGS=-fopenmp will enable parallel inference, if openmp presents.

Type of change

• New feature (non-breaking change which adds functionality)

Tests

Run the current set of tests with HLS4ML_USE_JIT=1 will work. Added test_jit.py for standlone test.

Checklist

• I have read the guidelines for contributing.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have installed and run pre-commit on the files I edited or added.
• I have added tests that prove my fix is effective or that my feature works.

[calad0i]

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