| Index: third_party/libjpeg_turbo/simd/jdct.inc
|
| ===================================================================
|
| --- third_party/libjpeg_turbo/simd/jdct.inc (revision 0)
|
| +++ third_party/libjpeg_turbo/simd/jdct.inc (revision 0)
|
| @@ -0,0 +1,28 @@
|
| +;
|
| +; 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)
|
| +
|
| +; --------------------------------------------------------------------------
|
|
|