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Author SHA1 Message Date
Andrey Semashev
bc9b0e6177 Implemented integer_log2 in terms of countl_zero from Boost.Core. 
This allows to use compiler intrinsics and specialized hardware
instructions to compute log2, which results in better performance.

Also, added tests for the generic implementation using Boost.Multiprecision
integers.

Closes https://github.com/boostorg/integer/issues/31.
 2022-01-16 15:20:37 +03:00
Andrey Semashev
a832e8fe65 Added a test for integer_log2. 2021-12-21 20:36:24 +03:00