[D-runtime] [D-Programming-Language/druntime] 10821c: Add core.bitopt.bitswap(ulong)

[GitHub via D-runtime]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: 10821c643a47ed7ccf702a134b34669b4aef9e96
      https://github.com/D-Programming-Language/druntime/commit/10821c643a47ed7ccf702a134b34669b4aef9e96
  Author: Mathias Lang <mathias.lang at sociomantic.com>
  Date:   2015-09-03 (Thu, 03 Sep 2015)

  Changed paths:
    M src/core/bitop.d

  Log Message:
  -----------
  Add core.bitopt.bitswap(ulong)

The original (D1) core.bitop module had both the 32 and 64 bits versions, but only the 32 bits version was added to druntime.
This commit contains the original tango code of bitswap(ulong), only slightly modified using feedback from the 32 bits version.


  Commit: 3e3426fdccd6c4ee80d40fe981b094ce2380b6ed
      https://github.com/D-Programming-Language/druntime/commit/3e3426fdccd6c4ee80d40fe981b094ce2380b6ed
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-09-06 (Sun, 06 Sep 2015)

  Changed paths:
    M src/core/bitop.d

  Log Message:
  -----------
  Merge pull request #1374 from mathias-lang-sociomantic/bitswap-ulong

Add core.bitopt.bitswap(ulong)


Compare: https://github.com/D-Programming-Language/druntime/compare/46fdff3c82d9...3e3426fdccd6