Libav
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00001 /* 00002 * This file is part of FFmpeg. 00003 * 00004 * FFmpeg is free software; you can redistribute it and/or 00005 * modify it under the terms of the GNU Lesser General Public 00006 * License as published by the Free Software Foundation; either 00007 * version 2.1 of the License, or (at your option) any later version. 00008 * 00009 * FFmpeg is distributed in the hope that it will be useful, 00010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 * Lesser General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU Lesser General Public 00015 * License along with FFmpeg; if not, write to the Free Software 00016 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00017 */ 00018 00024 #ifndef AVCODEC_PPC_UTIL_ALTIVEC_H 00025 #define AVCODEC_PPC_UTIL_ALTIVEC_H 00026 00027 #include <stdint.h> 00028 00029 #include "config.h" 00030 00031 #if HAVE_ALTIVEC_H 00032 #include <altivec.h> 00033 #endif 00034 00035 // used to build registers permutation vectors (vcprm) 00036 // the 's' are for words in the _s_econd vector 00037 #define WORD_0 0x00,0x01,0x02,0x03 00038 #define WORD_1 0x04,0x05,0x06,0x07 00039 #define WORD_2 0x08,0x09,0x0a,0x0b 00040 #define WORD_3 0x0c,0x0d,0x0e,0x0f 00041 #define WORD_s0 0x10,0x11,0x12,0x13 00042 #define WORD_s1 0x14,0x15,0x16,0x17 00043 #define WORD_s2 0x18,0x19,0x1a,0x1b 00044 #define WORD_s3 0x1c,0x1d,0x1e,0x1f 00045 00046 #define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d} 00047 #define vcii(a,b,c,d) (const vector float){FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d} 00048 00049 // vcprmle is used to keep the same index as in the SSE version. 00050 // it's the same as vcprm, with the index inversed 00051 // ('le' is Little Endian) 00052 #define vcprmle(a,b,c,d) vcprm(d,c,b,a) 00053 00054 // used to build inverse/identity vectors (vcii) 00055 // n is _n_egative, p is _p_ositive 00056 #define FLOAT_n -1. 00057 #define FLOAT_p 1. 00058 00059 00060 // Transpose 8x8 matrix of 16-bit elements (in-place) 00061 #define TRANSPOSE8(a,b,c,d,e,f,g,h) \ 00062 do { \ 00063 vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \ 00064 vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \ 00065 \ 00066 A1 = vec_mergeh (a, e); \ 00067 B1 = vec_mergel (a, e); \ 00068 C1 = vec_mergeh (b, f); \ 00069 D1 = vec_mergel (b, f); \ 00070 E1 = vec_mergeh (c, g); \ 00071 F1 = vec_mergel (c, g); \ 00072 G1 = vec_mergeh (d, h); \ 00073 H1 = vec_mergel (d, h); \ 00074 \ 00075 A2 = vec_mergeh (A1, E1); \ 00076 B2 = vec_mergel (A1, E1); \ 00077 C2 = vec_mergeh (B1, F1); \ 00078 D2 = vec_mergel (B1, F1); \ 00079 E2 = vec_mergeh (C1, G1); \ 00080 F2 = vec_mergel (C1, G1); \ 00081 G2 = vec_mergeh (D1, H1); \ 00082 H2 = vec_mergel (D1, H1); \ 00083 \ 00084 a = vec_mergeh (A2, E2); \ 00085 b = vec_mergel (A2, E2); \ 00086 c = vec_mergeh (B2, F2); \ 00087 d = vec_mergel (B2, F2); \ 00088 e = vec_mergeh (C2, G2); \ 00089 f = vec_mergel (C2, G2); \ 00090 g = vec_mergeh (D2, H2); \ 00091 h = vec_mergel (D2, H2); \ 00092 } while (0) 00093 00094 00097 static inline vector unsigned char unaligned_load(int offset, uint8_t *src) 00098 { 00099 register vector unsigned char first = vec_ld(offset, src); 00100 register vector unsigned char second = vec_ld(offset+15, src); 00101 register vector unsigned char mask = vec_lvsl(offset, src); 00102 return vec_perm(first, second, mask); 00103 } 00104 00105 #endif /* AVCODEC_PPC_UTIL_ALTIVEC_H */