2
* This file is part of Libav.
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.
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.
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
21
* Contains misc utility macros and inline functions
24
#ifndef AVCODEC_PPC_UTIL_ALTIVEC_H
25
#define AVCODEC_PPC_UTIL_ALTIVEC_H
35
#include "types_altivec.h"
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
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}
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)
56
// used to build inverse/identity vectors (vcii)
57
// n is _n_egative, p is _p_ositive
62
// Transpose 8x8 matrix of 16-bit elements (in-place)
63
#define TRANSPOSE8(a,b,c,d,e,f,g,h) \
65
vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \
66
vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \
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); \
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); \
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); \
97
/** @brief loads unaligned vector @a *src with offset @a offset
99
static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
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);
108
* loads vector known misalignment
109
* @param perm_vec the align permute vector to combine the two loads from lvsl
111
static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec)
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);
118
#endif /* AVCODEC_PPC_UTIL_ALTIVEC_H */