From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 26 May 2018 15:22:39 +0000 (+0100)
Subject: utils/bits.h: Refactor the load/store macros.
X-Git-Tag: 2.3.0~6
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/commitdiff_plain/897c58ad7408d8001e63fcc2ca8e598c9811a539?hp=897c58ad7408d8001e63fcc2ca8e598c9811a539

utils/bits.h: Refactor the load/store macros.

  * Each macro is now only defined conditionally.  This allows earlier
    parts of the header file to define a compiler-specific
    implementation, with the generic definitions filling in the blanks.

  * Instead of writing the byte manipulations out longhand, build each
    one out of smaller pieces.  This has two benefits: firstly, the new
    definitions are smaller and easier to understand; and, secondly, if
    there's a compiler-specific trick for, say 16-bit loads, then 32-bit
    loads can win some of the benefit.
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