Intel® oneAPI Threading Building Blocks
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atomic<float> only support fetch_and_store but not support fetch_and_add?

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RafSchietekat
Black Belt
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That would be nice and orthogonal, but neither TBB nor C++11 provide arithmetic operations for floating-point types, so they require you to cobble those together yourself (note that with TBB you'll have to be extra careful when evaluating the result of compare_and_swap, as plus zero and minus zero are different bit patterns but compare as equal for the equality operator).
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