kc3-lang/libjpeg-turbo/simd/jdct.inc

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• Hash : b7753510
  Author :
  Date : 2014-05-11T09:36:25
  

  Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons.  They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code.  In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.)
  
  
  git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1285 632fc199-4ca6-4c93-a231-07263d6284db
  

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• simd/jdct.inc

• ;
  ; jdct.inc - private declarations for forward & reverse DCT subsystems
  ;
  ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
  ;
  ; Based on
  ; x86 SIMD extension for IJG JPEG library
  ; Copyright (C) 1999-2006, MIYASAKA Masaru.
  ; For conditions of distribution and use, see copyright notice in jsimdext.inc
  ;
  ; [TAB8]
  
  ; Each IDCT routine is responsible for range-limiting its results and
  ; converting them to unsigned form (0..MAXJSAMPLE).  The raw outputs could
  ; be quite far out of range if the input data is corrupt, so a bulletproof
  ; range-limiting step is required.  We use a mask-and-table-lookup method
  ; to do the combined operations quickly.
  ;
  %define RANGE_MASK  (MAXJSAMPLE * 4 + 3)  ; 2 bits wider than legal samples
  
  %define ROW(n,b,s)              ((b)+(n)*(s))
  %define COL(n,b,s)              ((b)+(n)*(s)*DCTSIZE)
  
  %define DWBLOCK(m,n,b,s)        ((b)+(m)*DCTSIZE*(s)+(n)*SIZEOF_DWORD)
  %define MMBLOCK(m,n,b,s)        ((b)+(m)*DCTSIZE*(s)+(n)*SIZEOF_MMWORD)
  %define XMMBLOCK(m,n,b,s)       ((b)+(m)*DCTSIZE*(s)+(n)*SIZEOF_XMMWORD)
  
  ; --------------------------------------------------------------------------
  

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