The bits-extras package
This package contains efficient implementations of high-level bit operations missing from Data.Bits. The implementation is based on GCC builtins, which translate to specialized instructions where available.
All operations in this package can also be (less efficiently) implemented in terms of Data.Bits operations.
Issues: A GCC-provided library,
libgcc_s, is dynamically linked to
provide software fallbacks on architectures without instructions
corresponding to specific operations. This is currently only expected to work
on Linux systems, and even there can lead to issues with GHCi's custom
linker. A workaround for GHCi on a linux system:
ln -s /lib/libgcc_s.so.1
The current plan for broader support is to replace the libgcc dependency with built-in fallbacks in C or Haskell code. This needs to closely follow GCC's fall-back behaviour for each architecture. Alternative ideas would be appreciated.
Relevant Hackage tickets:
|Versions||0.1.0, 0.1.1, 0.1.2, 0.1.3|
|Dependencies||base (>=4 && <6) [details]|
|Author||Gabriel Wicke <email@example.com>|
|Maintainer||Gabriel Wicke <firstname.lastname@example.org>|
|Source repository||head: hg clone http://dev.wikidev.net/hg/bits-extras/|
|Uploaded||Mon Sep 6 11:11:41 UTC 2010 by GabrielWicke|
|Downloads||1839 total (23 in the last 30 days)|
|Status||Docs uploaded by user
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