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7 Commits

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
c5df07cb21 Simplified integer_log2 implementation. 
Removed unnecessary template specializations, removed workaround for
compilers not supporting partial template specializations. Use unsigned
integers for bit counting, which allows to replace the division with
a shift.
 2021-12-21 20:39:22 +03:00
Andrey Semashev
092d94c833 Converted all links to www.boost.org to https. 
Closes https://github.com/boostorg/integer/pull/25.
 2021-01-20 11:34:42 +03:00
Andrey Semashev
5e2a2722f1 Use BOOST_ASSERT instead of assert. 2020-05-02 18:18:10 +03:00
Andrey Semashev
5ae18d139e Use BOOST_BORLANDC in integer_log2.hpp 2020-05-02 18:16:16 +03:00
Edward Diener
52c02d1237 Change __BORLANDC__ to BOOST_BORLANDC, which is defined in Boost config for the Embarcadero non-clang-based compilers. 2020-03-29 08:30:32 -04:00
Glen Fernandes
40b52301df Move integer_log2 from pending to integer 2014-06-05 15:48:22 -07:00