1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19/** 20 * @file 21 * Contains misc utility macros and inline functions 22 */ 23 24#ifndef AVUTIL_PPC_UTIL_ALTIVEC_H 25#define AVUTIL_PPC_UTIL_ALTIVEC_H 26 27#include <stdint.h> 28 29#include "config.h" 30 31#if HAVE_ALTIVEC_H 32#include <altivec.h> 33#endif 34 35#include "types_altivec.h" 36 37#if HAVE_ALTIVEC 38 39// used to build registers permutation vectors (vcprm) 40// the 's' are for words in the _s_econd vector 41#define WORD_0 0x00,0x01,0x02,0x03 42#define WORD_1 0x04,0x05,0x06,0x07 43#define WORD_2 0x08,0x09,0x0a,0x0b 44#define WORD_3 0x0c,0x0d,0x0e,0x0f 45#define WORD_s0 0x10,0x11,0x12,0x13 46#define WORD_s1 0x14,0x15,0x16,0x17 47#define WORD_s2 0x18,0x19,0x1a,0x1b 48#define WORD_s3 0x1c,0x1d,0x1e,0x1f 49 50#define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d} 51 52 53// Transpose 8x8 matrix of 16-bit elements (in-place) 54#define TRANSPOSE8(a,b,c,d,e,f,g,h) \ 55do { \ 56 vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \ 57 vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \ 58 \ 59 A1 = vec_mergeh (a, e); \ 60 B1 = vec_mergel (a, e); \ 61 C1 = vec_mergeh (b, f); \ 62 D1 = vec_mergel (b, f); \ 63 E1 = vec_mergeh (c, g); \ 64 F1 = vec_mergel (c, g); \ 65 G1 = vec_mergeh (d, h); \ 66 H1 = vec_mergel (d, h); \ 67 \ 68 A2 = vec_mergeh (A1, E1); \ 69 B2 = vec_mergel (A1, E1); \ 70 C2 = vec_mergeh (B1, F1); \ 71 D2 = vec_mergel (B1, F1); \ 72 E2 = vec_mergeh (C1, G1); \ 73 F2 = vec_mergel (C1, G1); \ 74 G2 = vec_mergeh (D1, H1); \ 75 H2 = vec_mergel (D1, H1); \ 76 \ 77 a = vec_mergeh (A2, E2); \ 78 b = vec_mergel (A2, E2); \ 79 c = vec_mergeh (B2, F2); \ 80 d = vec_mergel (B2, F2); \ 81 e = vec_mergeh (C2, G2); \ 82 f = vec_mergel (C2, G2); \ 83 g = vec_mergeh (D2, H2); \ 84 h = vec_mergel (D2, H2); \ 85} while (0) 86 87 88/** @brief loads unaligned vector @a *src with offset @a offset 89 and returns it */ 90static inline vector unsigned char unaligned_load(int offset, uint8_t *src) 91{ 92 register vector unsigned char first = vec_ld(offset, src); 93 register vector unsigned char second = vec_ld(offset+15, src); 94 register vector unsigned char mask = vec_lvsl(offset, src); 95 return vec_perm(first, second, mask); 96} 97 98/** 99 * loads vector known misalignment 100 * @param perm_vec the align permute vector to combine the two loads from lvsl 101 */ 102static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec) 103{ 104 vec_u8 a = vec_ld(offset, src); 105 vec_u8 b = vec_ld(offset+15, src); 106 return vec_perm(a, b, perm_vec); 107} 108 109#define vec_unaligned_load(b) \ 110 vec_perm(vec_ld(0, b), vec_ld(15, b), vec_lvsl(0, b)); 111 112#endif /* HAVE_ALTIVEC */ 113 114#endif /* AVUTIL_PPC_UTIL_ALTIVEC_H */ 115