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Add source of prevPower function

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This commit is contained in:
Max Lübke 2023-10-05 08:22:08 +02:00
parent 505d0cb9da
commit c9c0daa098
1 changed files with 5 additions and 1 deletions
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6
src/sycl_comp.cpp
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@ -132,7 +132,11 @@ auto matrixMultTransposeSYCL(sycl::queue &q, const Matrix<data_type> &matA,
return matRes.chksum(); return matRes.chksum();
} }
/* Obtains the previous power of two from the given integer. /*
* Obtained from
* https://github.com/codeplaysoftware/computecpp-sdk/blob/master/samples/matrix-multiply.cpp
*
* Obtains the previous power of two from the given integer.
* It works by masking out all ones after the first one bit, * It works by masking out all ones after the first one bit,
* then leaves the first one bit intact, effectively * then leaves the first one bit intact, effectively
* yielding the first power of two < x. */ * yielding the first power of two < x. */