2 * AltiVec optimizations for libjpeg-turbo
4 * Copyright (C) 2014, D. R. Commander. All Rights Reserved.
6 * This software is provided 'as-is', without any express or implied
7 * warranty. In no event will the authors be held liable for any damages
8 * arising from the use of this software.
10 * Permission is granted to anyone to use this software for any purpose,
11 * including commercial applications, and to alter it and redistribute it
12 * freely, subject to the following restrictions:
14 * 1. The origin of this software must not be misrepresented; you must not
15 * claim that you wrote the original software. If you use this software
16 * in a product, an acknowledgment in the product documentation would be
17 * appreciated but is not required.
18 * 2. Altered source versions must be plainly marked as such, and must not be
19 * misrepresented as being the original software.
20 * 3. This notice may not be removed or altered from any source distribution.
23 /* RGB --> GRAYSCALE CONVERSION */
25 #include "jsimd_altivec.h"
28 #define F_0_114 7471 /* FIX(0.11400) */
29 #define F_0_250 16384 /* FIX(0.25000) */
30 #define F_0_299 19595 /* FIX(0.29900) */
31 #define F_0_587 38470 /* FIX(0.58700) */
32 #define F_0_337 (F_0_587 - F_0_250) /* FIX(0.58700) - FIX(0.25000) */
35 #define ONE_HALF (1 << (SCALEBITS - 1))
39 { 0, 1, 3, 4, 6, 7, 9, 10, 2, 1, 5, 4, 8, 7, 11, 10 }
41 { 12, 13, 15, 16, 18, 19, 21, 22, 14, 13, 17, 16, 20, 19, 23, 22 }
43 { 8, 9, 11, 12, 14, 15, 17, 18, 10, 9, 13, 12, 16, 15, 19, 18 }
45 { 4, 5, 7, 8, 10, 11, 13, 14, 6, 5, 9, 8, 12, 11, 15, 14 }
46 #include "jcgryext-altivec.c"
49 #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
50 #define jsimd_rgb_gray_convert_altivec jsimd_extrgb_gray_convert_altivec
51 #include "jcgryext-altivec.c"
57 #undef jsimd_rgb_gray_convert_altivec
59 #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
61 { 0, 1, 4, 5, 8, 9, 12, 13, 2, 1, 6, 5, 10, 9, 14, 13 }
62 #define jsimd_rgb_gray_convert_altivec jsimd_extrgbx_gray_convert_altivec
63 #include "jcgryext-altivec.c"
66 #undef jsimd_rgb_gray_convert_altivec
68 #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
70 { 2, 1, 5, 4, 8, 7, 11, 10, 0, 1, 3, 4, 6, 7, 9, 10 }
72 { 14, 13, 17, 16, 20, 19, 23, 22, 12, 13, 15, 16, 18, 19, 21, 22 }
74 { 10, 9, 13, 12, 16, 15, 19, 18, 8, 9, 11, 12, 14, 15, 17, 18 }
76 { 6, 5, 9, 8, 12, 11, 15, 14, 4, 5, 7, 8, 10, 11, 13, 14 }
77 #define jsimd_rgb_gray_convert_altivec jsimd_extbgr_gray_convert_altivec
78 #include "jcgryext-altivec.c"
84 #undef jsimd_rgb_gray_convert_altivec
86 #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
88 { 2, 1, 6, 5, 10, 9, 14, 13, 0, 1, 4, 5, 8, 9, 12, 13 }
89 #define jsimd_rgb_gray_convert_altivec jsimd_extbgrx_gray_convert_altivec
90 #include "jcgryext-altivec.c"
93 #undef jsimd_rgb_gray_convert_altivec
95 #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
97 { 3, 2, 7, 6, 11, 10, 15, 14, 1, 2, 5, 6, 9, 10, 13, 14 }
98 #define jsimd_rgb_gray_convert_altivec jsimd_extxbgr_gray_convert_altivec
99 #include "jcgryext-altivec.c"
102 #undef jsimd_rgb_gray_convert_altivec
104 #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
106 { 1, 2, 5, 6, 9, 10, 13, 14, 3, 2, 7, 6, 11, 10, 15, 14 }
107 #define jsimd_rgb_gray_convert_altivec jsimd_extxrgb_gray_convert_altivec
108 #include "jcgryext-altivec.c"
111 #undef jsimd_rgb_gray_convert_altivec