1 /* 2 * AltiVec optimizations for libjpeg-turbo 3 * 4 * Copyright (C) 2014-2015, D. R. Commander. All Rights Reserved. 5 * 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. 9 * 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: 13 * 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. 21 */ 22 23 #define JPEG_INTERNALS 24 #include "../jinclude.h" 25 #include "../jpeglib.h" 26 #include "../jsimd.h" 27 #include "../jdct.h" 28 #include "../jsimddct.h" 29 #include "jsimd.h" 30 #include <altivec.h> 31 32 33 /* Common code */ 34 35 #define __4X(a) a, a, a, a 36 #define __4X2(a, b) a, b, a, b, a, b, a, b 37 #define __8X(a) __4X(a), __4X(a) 38 #define __16X(a) __8X(a), __8X(a) 39 40 #define TRANSPOSE(row, col) \ 41 { \ 42 __vector short row04l, row04h, row15l, row15h, \ 43 row26l, row26h, row37l, row37h; \ 44 __vector short col01e, col01o, col23e, col23o, \ 45 col45e, col45o, col67e, col67o; \ 46 \ 47 /* transpose coefficients (phase 1) */ \ 48 row04l = vec_mergeh(row##0, row##4); /* row04l=(00 40 01 41 02 42 03 43) */ \ 49 row04h = vec_mergel(row##0, row##4); /* row04h=(04 44 05 45 06 46 07 47) */ \ 50 row15l = vec_mergeh(row##1, row##5); /* row15l=(10 50 11 51 12 52 13 53) */ \ 51 row15h = vec_mergel(row##1, row##5); /* row15h=(14 54 15 55 16 56 17 57) */ \ 52 row26l = vec_mergeh(row##2, row##6); /* row26l=(20 60 21 61 22 62 23 63) */ \ 53 row26h = vec_mergel(row##2, row##6); /* row26h=(24 64 25 65 26 66 27 67) */ \ 54 row37l = vec_mergeh(row##3, row##7); /* row37l=(30 70 31 71 32 72 33 73) */ \ 55 row37h = vec_mergel(row##3, row##7); /* row37h=(34 74 35 75 36 76 37 77) */ \ 56 \ 57 /* transpose coefficients (phase 2) */ \ 58 col01e = vec_mergeh(row04l, row26l); /* col01e=(00 20 40 60 01 21 41 61) */ \ 59 col23e = vec_mergel(row04l, row26l); /* col23e=(02 22 42 62 03 23 43 63) */ \ 60 col45e = vec_mergeh(row04h, row26h); /* col45e=(04 24 44 64 05 25 45 65) */ \ 61 col67e = vec_mergel(row04h, row26h); /* col67e=(06 26 46 66 07 27 47 67) */ \ 62 col01o = vec_mergeh(row15l, row37l); /* col01o=(10 30 50 70 11 31 51 71) */ \ 63 col23o = vec_mergel(row15l, row37l); /* col23o=(12 32 52 72 13 33 53 73) */ \ 64 col45o = vec_mergeh(row15h, row37h); /* col45o=(14 34 54 74 15 35 55 75) */ \ 65 col67o = vec_mergel(row15h, row37h); /* col67o=(16 36 56 76 17 37 57 77) */ \ 66 \ 67 /* transpose coefficients (phase 3) */ \ 68 col##0 = vec_mergeh(col01e, col01o); /* col0=(00 10 20 30 40 50 60 70) */ \ 69 col##1 = vec_mergel(col01e, col01o); /* col1=(01 11 21 31 41 51 61 71) */ \ 70 col##2 = vec_mergeh(col23e, col23o); /* col2=(02 12 22 32 42 52 62 72) */ \ 71 col##3 = vec_mergel(col23e, col23o); /* col3=(03 13 23 33 43 53 63 73) */ \ 72 col##4 = vec_mergeh(col45e, col45o); /* col4=(04 14 24 34 44 54 64 74) */ \ 73 col##5 = vec_mergel(col45e, col45o); /* col5=(05 15 25 35 45 55 65 75) */ \ 74 col##6 = vec_mergeh(col67e, col67o); /* col6=(06 16 26 36 46 56 66 76) */ \ 75 col##7 = vec_mergel(col67e, col67o); /* col7=(07 17 27 37 47 57 67 77) */ \ 76 } 77 78 #ifndef min 79 #define min(a,b) ((a) < (b) ? (a) : (b)) 80 #endif 81 82 83 /* Macros to abstract big/little endian bit twiddling */ 84 85 #if __BIG_ENDIAN__ 86 87 #define VEC_LD(a, b) vec_ld(a, b) 88 #define VEC_ST(a, b, c) vec_st(a, b, c) 89 #define VEC_UNPACKHU(a) vec_mergeh(pb_zero, a) 90 #define VEC_UNPACKLU(a) vec_mergel(pb_zero, a) 91 92 #else 93 94 #define VEC_LD(a, b) vec_vsx_ld(a, b) 95 #define VEC_ST(a, b, c) vec_vsx_st(a, b, c) 96 #define VEC_UNPACKHU(a) vec_mergeh(a, pb_zero) 97 #define VEC_UNPACKLU(a) vec_mergel(a, pb_zero) 98 99 #endif 100
