catch3/tests/SelfTest/IntrospectiveTests/Integer.tests.cpp, branch constexpr_approx Progmasoft Catch3: an independently maintained C++17 test framework with a parallel runner, property checks, snapshots and structured results. Optimize 64x64 extended multiplication implementation 2024-04-03T11:28:25+00:00 Martin Hořeňovský 2024-04-02T16:09:34+00:00 d99eb8bec8de53639540820ee2a6563b88c4ba8c Now we use intrinsics when possible, and fallback to optimized implementation in portable C++. The difference is about 4x when we can use intrinsics and about 2x when we cannot. This should speed up our Lemire's algorithm implementation nicely. 
Now we use intrinsics when possible, and fallback to optimized
implementation in portable C++. The difference is about 4x when
we can use intrinsics and about 2x when we cannot.

This should speed up our Lemire's algorithm implementation nicely.
Add helpers for implementing uniform integer distribution 2023-12-10T18:53:36+00:00 Martin Hořeňovský 2023-11-28T22:26:06+00:00 04a829b0e13401049707c7c70e95c3cc0c73ba22 * Utility for extended mult n x n bits -> 2n bits * Utility to adapt output from URBG to target (unsigned) integral type * Utility to reorder signed values into unsigned type while keeping the order. 
* Utility for extended mult n x n bits -> 2n bits
* Utility to adapt output from URBG to target (unsigned) integral
  type
* Utility to reorder signed values into unsigned type while keeping
  the order.