1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Contains misc utility macros and inline functions
*/
#ifndef AVUTIL_PPC_UTIL_ALTIVEC_H
#define AVUTIL_PPC_UTIL_ALTIVEC_H
#include <stdint.h>
#include "config.h"
/***********************************************************************
* Vector types
**********************************************************************/
#define vec_u8 vector unsigned char
#define vec_s8 vector signed char
#define vec_u16 vector unsigned short
#define vec_s16 vector signed short
#define vec_u32 vector unsigned int
#define vec_s32 vector signed int
#define vec_f vector float
/***********************************************************************
* Null vector
**********************************************************************/
#define LOAD_ZERO const vec_u8 zerov = vec_splat_u8( 0 )
#define zero_u8v (vec_u8) zerov
#define zero_s8v (vec_s8) zerov
#define zero_u16v (vec_u16) zerov
#define zero_s16v (vec_s16) zerov
#define zero_u32v (vec_u32) zerov
#define zero_s32v (vec_s32) zerov
#if HAVE_ALTIVEC
#include <altivec.h>
// used to build registers permutation vectors (vcprm)
// the 's' are for words in the _s_econd vector
#define WORD_0 0x00,0x01,0x02,0x03
#define WORD_1 0x04,0x05,0x06,0x07
#define WORD_2 0x08,0x09,0x0a,0x0b
#define WORD_3 0x0c,0x0d,0x0e,0x0f
#define WORD_s0 0x10,0x11,0x12,0x13
#define WORD_s1 0x14,0x15,0x16,0x17
#define WORD_s2 0x18,0x19,0x1a,0x1b
#define WORD_s3 0x1c,0x1d,0x1e,0x1f
#define vcprm(a,b,c,d) (const vec_u8){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d}
// Transpose 8x8 matrix of 16-bit elements (in-place)
#define TRANSPOSE8(a,b,c,d,e,f,g,h) \
do { \
vec_s16 A1, B1, C1, D1, E1, F1, G1, H1; \
vec_s16 A2, B2, C2, D2, E2, F2, G2, H2; \
\
A1 = vec_mergeh (a, e); \
B1 = vec_mergel (a, e); \
C1 = vec_mergeh (b, f); \
D1 = vec_mergel (b, f); \
E1 = vec_mergeh (c, g); \
F1 = vec_mergel (c, g); \
G1 = vec_mergeh (d, h); \
H1 = vec_mergel (d, h); \
\
A2 = vec_mergeh (A1, E1); \
B2 = vec_mergel (A1, E1); \
C2 = vec_mergeh (B1, F1); \
D2 = vec_mergel (B1, F1); \
E2 = vec_mergeh (C1, G1); \
F2 = vec_mergel (C1, G1); \
G2 = vec_mergeh (D1, H1); \
H2 = vec_mergel (D1, H1); \
\
a = vec_mergeh (A2, E2); \
b = vec_mergel (A2, E2); \
c = vec_mergeh (B2, F2); \
d = vec_mergel (B2, F2); \
e = vec_mergeh (C2, G2); \
f = vec_mergel (C2, G2); \
g = vec_mergeh (D2, H2); \
h = vec_mergel (D2, H2); \
} while (0)
/** @brief loads unaligned vector @a *src with offset @a offset
and returns it */
static inline vec_u8 unaligned_load(int offset, uint8_t *src)
{
register vec_u8 first = vec_ld(offset, src);
register vec_u8 second = vec_ld(offset + 15, src);
register vec_u8 mask = vec_lvsl(offset, src);
return vec_perm(first, second, mask);
}
/**
* loads vector known misalignment
* @param perm_vec the align permute vector to combine the two loads from lvsl
*/
static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec)
{
vec_u8 a = vec_ld(offset, src);
vec_u8 b = vec_ld(offset + 15, src);
return vec_perm(a, b, perm_vec);
}
#define vec_unaligned_load(b) \
vec_perm(vec_ld(0, b), vec_ld(15, b), vec_lvsl(0, b));
#endif /* HAVE_ALTIVEC */
#if HAVE_VSX
#if HAVE_BIGENDIAN
#define vsx_ld_u8_s16(off, p) \
((vec_s16)vec_mergeh((vec_u8)vec_splat_u8(0), \
(vec_u8)vec_vsx_ld((off), (p))))
#else
#define vsx_ld_u8_s16(off, p) \
((vec_s16)vec_mergeh((vec_u8)vec_vsx_ld((off), (p)), \
(vec_u8)vec_splat_u8(0)))
#endif /* HAVE_BIGENDIAN */
#endif /* HAVE_VSX */
#endif /* AVUTIL_PPC_UTIL_ALTIVEC_H */
|
