tree 8b71b7ca5f8ba86f7a68ce3127d603cbe09719fe
parent cb49bb00d9240475eb57976de1b7351f4e3f81ad
author DRC <information@libjpeg-turbo.org> 1454476626 -0600
committer DRC <information@libjpeg-turbo.org> 1454477943 -0600

Use consistent formatting in ARM NEON SIMD code

There aren't really any best practices to follow here.  I tried as best
as I could to adopt a standard that would ease any future maintenance
burdens.  The basic tenets of that standard are:

* Assembly instructions always start on Column 5, and operands always
  start on Column 21, except:
  - The instruction and operand can be indented (usually by 2 spaces)
    to indicate a separate instruction stream.
  - If the instruction is within an enclosing .if block in a macro,
    it should always be indented relative to the .if block.
* Comments are placed with an eye toward readability.  There are always
  at least 2 spaces between the end of a line of code and the associated
  in-line comment.  Where it made sense, I tried to line up the comments
  in blocks, and some were shifted right to avoid overlap with
  neighboring instruction lines.  Not an exact science.
* Assembler directives and macros use 2-space indenting rules.  .if
  blocks are indented relative to the macro, and code within the .if
  blocks is indented relative to the .if directive.
* No extraneous spaces between operands.  Lining up the operands
  vertically did not really improve readability-- personally, I think it
  made it worse, since my eye would tend to lose its place in the
  uniform columns of characters.  Also, code with a lot of vertical
  alignment is really hard to maintain, since changing one line could
  necessitate changing a bunch of other lines to avoid spoiling the
  alignment.
* No extraneous spaces in #defines or other directives.  In general, the
  only extraneous spaces (other than indenting spaces) are between:
  - Instructions and operands
  - Operands and in-line comments
This standard should be more or less in keeping with other formatting
standards used within the project.