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

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• Hash : 9a51a87a
  Author :
  Date : 2019-10-17T11:21:32
  

  x86 SIMD: Remove obsolete [TAB8] comments
  
  With apologies to Richard Hendricks, our assembly code no longer uses
  tabs.
  

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• simd/nasm/jdct.inc

• ;
  ; jdct.inc - private declarations for forward & reverse DCT subsystems
  ;
  ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
  ; Copyright (C) 2018, D. R. Commander.
  ;
  ; Based on the 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
  
  ; 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)
  %define YMMBLOCK(m, n, b, s) \
    ((b) + (m) * DCTSIZE * (s) + (n) * SIZEOF_YMMWORD)
  
  ; --------------------------------------------------------------------------
  

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