1/* 2 * This file is part of Libav. 3 * 4 * Libav 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 * Libav 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 Libav; 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 AVCODEC_PPC_UTIL_ALTIVEC_H 25#define AVCODEC_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// used to build registers permutation vectors (vcprm) 38// the 's' are for words in the _s_econd vector 39#define WORD_0 0x00,0x01,0x02,0x03 40#define WORD_1 0x04,0x05,0x06,0x07 41#define WORD_2 0x08,0x09,0x0a,0x0b 42#define WORD_3 0x0c,0x0d,0x0e,0x0f 43#define WORD_s0 0x10,0x11,0x12,0x13 44#define WORD_s1 0x14,0x15,0x16,0x17 45#define WORD_s2 0x18,0x19,0x1a,0x1b 46#define WORD_s3 0x1c,0x1d,0x1e,0x1f 47 48#define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d} 49#define vcii(a,b,c,d) (const vector float){FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d} 50 51// vcprmle is used to keep the same index as in the SSE version. 52// it's the same as vcprm, with the index inversed 53// ('le' is Little Endian) 54#define vcprmle(a,b,c,d) vcprm(d,c,b,a) 55 56// used to build inverse/identity vectors (vcii) 57// n is _n_egative, p is _p_ositive 58#define FLOAT_n -1. 59#define FLOAT_p 1. 60 61 62// Transpose 8x8 matrix of 16-bit elements (in-place) 63#define TRANSPOSE8(a,b,c,d,e,f,g,h) \ 64do { \ 65 vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \ 66 vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \ 67 \ 68 A1 = vec_mergeh (a, e); \ 69 B1 = vec_mergel (a, e); \ 70 C1 = vec_mergeh (b, f); \ 71 D1 = vec_mergel (b, f); \ 72 E1 = vec_mergeh (c, g); \ 73 F1 = vec_mergel (c, g); \ 74 G1 = vec_mergeh (d, h); \ 75 H1 = vec_mergel (d, h); \ 76 \ 77 A2 = vec_mergeh (A1, E1); \ 78 B2 = vec_mergel (A1, E1); \ 79 C2 = vec_mergeh (B1, F1); \ 80 D2 = vec_mergel (B1, F1); \ 81 E2 = vec_mergeh (C1, G1); \ 82 F2 = vec_mergel (C1, G1); \ 83 G2 = vec_mergeh (D1, H1); \ 84 H2 = vec_mergel (D1, H1); \ 85 \ 86 a = vec_mergeh (A2, E2); \ 87 b = vec_mergel (A2, E2); \ 88 c = vec_mergeh (B2, F2); \ 89 d = vec_mergel (B2, F2); \ 90 e = vec_mergeh (C2, G2); \ 91 f = vec_mergel (C2, G2); \ 92 g = vec_mergeh (D2, H2); \ 93 h = vec_mergel (D2, H2); \ 94} while (0) 95 96 97/** @brief loads unaligned vector @a *src with offset @a offset 98 and returns it */ 99static inline vector unsigned char unaligned_load(int offset, uint8_t *src) 100{ 101 register vector unsigned char first = vec_ld(offset, src); 102 register vector unsigned char second = vec_ld(offset+15, src); 103 register vector unsigned char mask = vec_lvsl(offset, src); 104 return vec_perm(first, second, mask); 105} 106 107/** 108 * loads vector known misalignment 109 * @param perm_vec the align permute vector to combine the two loads from lvsl 110 */ 111static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec) 112{ 113 vec_u8 a = vec_ld(offset, src); 114 vec_u8 b = vec_ld(offset+15, src); 115 return vec_perm(a, b, perm_vec); 116} 117 118#endif /* AVCODEC_PPC_UTIL_ALTIVEC_H */ 119