kc3-lang/libjpeg-turbo/simd/jcgray-altivec.c

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• Hash : ac4daa77
  Author :
  Date : 2015-01-10T22:56:26
  

  AltiVec SIMD implementation of YCC-to-RGB color conversion
  
  
  git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1489 632fc199-4ca6-4c93-a231-07263d6284db
  

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• simd/jcgray-altivec.c

• /*
   * AltiVec optimizations for libjpeg-turbo
   *
   * Copyright (C) 2014, D. R. Commander.
   * All rights reserved.
   * This software is provided 'as-is', without any express or implied
   * warranty.  In no event will the authors be held liable for any damages
   * arising from the use of this software.
   *
   * Permission is granted to anyone to use this software for any purpose,
   * including commercial applications, and to alter it and redistribute it
   * freely, subject to the following restrictions:
   *
   * 1. The origin of this software must not be misrepresented; you must not
   *    claim that you wrote the original software. If you use this software
   *    in a product, an acknowledgment in the product documentation would be
   *    appreciated but is not required.
   * 2. Altered source versions must be plainly marked as such, and must not be
   *    misrepresented as being the original software.
   * 3. This notice may not be removed or altered from any source distribution.
   */
  
  /* RGB --> GRAYSCALE CONVERSION */
  
  #include "jsimd_altivec.h"
  
  
  #define F_0_114 7471                 /* FIX(0.11400) */
  #define F_0_250 16384                /* FIX(0.25000) */
  #define F_0_299 19595                /* FIX(0.29900) */
  #define F_0_587 38470                /* FIX(0.58700) */
  #define F_0_337 (F_0_587 - F_0_250)  /* FIX(0.58700) - FIX(0.25000) */
  
  #define SCALEBITS 16
  #define ONE_HALF (1 << (SCALEBITS - 1))
  
  
  #define RGBG_INDEX0 {0,1,3,4,6,7,9,10,2,1,5,4,8,7,11,10}
  #define RGBG_INDEX1 {12,13,15,16,18,19,21,22,14,13,17,16,20,19,23,22}
  #define RGBG_INDEX2 {8,9,11,12,14,15,17,18,10,9,13,12,16,15,19,18}
  #define RGBG_INDEX3 {4,5,7,8,10,11,13,14,6,5,9,8,12,11,15,14}
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  
  #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
  #define jsimd_rgb_gray_convert_altivec jsimd_extrgb_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX0
  #undef RGBG_INDEX1
  #undef RGBG_INDEX2
  #undef RGBG_INDEX3
  #undef jsimd_rgb_gray_convert_altivec
  
  #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
  #define RGBG_INDEX {0,1,4,5,8,9,12,13,2,1,6,5,10,9,14,13}
  #define jsimd_rgb_gray_convert_altivec jsimd_extrgbx_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX
  #undef jsimd_rgb_gray_convert_altivec
  
  #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
  #define RGBG_INDEX0 {2,1,5,4,8,7,11,10,0,1,3,4,6,7,9,10}
  #define RGBG_INDEX1 {14,13,17,16,20,19,23,22,12,13,15,16,18,19,21,22}
  #define RGBG_INDEX2 {10,9,13,12,16,15,19,18,8,9,11,12,14,15,17,18}
  #define RGBG_INDEX3 {6,5,9,8,12,11,15,14,4,5,7,8,10,11,13,14}
  #define jsimd_rgb_gray_convert_altivec jsimd_extbgr_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX0
  #undef RGBG_INDEX1
  #undef RGBG_INDEX2
  #undef RGBG_INDEX3
  #undef jsimd_rgb_gray_convert_altivec
  
  #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
  #define RGBG_INDEX {2,1,6,5,10,9,14,13,0,1,4,5,8,9,12,13}
  #define jsimd_rgb_gray_convert_altivec jsimd_extbgrx_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX
  #undef jsimd_rgb_gray_convert_altivec
  
  #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
  #define RGBG_INDEX {3,2,7,6,11,10,15,14,1,2,5,6,9,10,13,14}
  #define jsimd_rgb_gray_convert_altivec jsimd_extxbgr_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX
  #undef jsimd_rgb_gray_convert_altivec
  
  #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
  #define RGBG_INDEX {1,2,5,6,9,10,13,14,3,2,7,6,11,10,15,14}
  #define jsimd_rgb_gray_convert_altivec jsimd_extxrgb_gray_convert_altivec
  #include "jcgryext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGBG_INDEX
  #undef jsimd_rgb_gray_convert_altivec
  

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