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comparison libavcodec/ppc/util_altivec.h @ 2:897f711a7157

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rearrange to work with autoconf
author Nina Engelhardt <nengel@mailbox.tu-berlin.de>
date Tue, 25 Sep 2012 15:55:33 +0200
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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 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 // used to build registers permutation vectors (vcprm)
36 // the 's' are for words in the _s_econd vector
37 #define WORD_0 0x00,0x01,0x02,0x03
38 #define WORD_1 0x04,0x05,0x06,0x07
39 #define WORD_2 0x08,0x09,0x0a,0x0b
40 #define WORD_3 0x0c,0x0d,0x0e,0x0f
41 #define WORD_s0 0x10,0x11,0x12,0x13
42 #define WORD_s1 0x14,0x15,0x16,0x17
43 #define WORD_s2 0x18,0x19,0x1a,0x1b
44 #define WORD_s3 0x1c,0x1d,0x1e,0x1f
45
46 #define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d}
47 #define vcii(a,b,c,d) (const vector float){FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d}
48
49 // vcprmle is used to keep the same index as in the SSE version.
50 // it's the same as vcprm, with the index inversed
51 // ('le' is Little Endian)
52 #define vcprmle(a,b,c,d) vcprm(d,c,b,a)
53
54 // used to build inverse/identity vectors (vcii)
55 // n is _n_egative, p is _p_ositive
56 #define FLOAT_n -1.
57 #define FLOAT_p 1.
58
59
60 // Transpose 8x8 matrix of 16-bit elements (in-place)
61 #define TRANSPOSE8(a,b,c,d,e,f,g,h) \
62 do { \
63 vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \
64 vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \
65 \
66 A1 = vec_mergeh (a, e); \
67 B1 = vec_mergel (a, e); \
68 C1 = vec_mergeh (b, f); \
69 D1 = vec_mergel (b, f); \
70 E1 = vec_mergeh (c, g); \
71 F1 = vec_mergel (c, g); \
72 G1 = vec_mergeh (d, h); \
73 H1 = vec_mergel (d, h); \
74 \
75 A2 = vec_mergeh (A1, E1); \
76 B2 = vec_mergel (A1, E1); \
77 C2 = vec_mergeh (B1, F1); \
78 D2 = vec_mergel (B1, F1); \
79 E2 = vec_mergeh (C1, G1); \
80 F2 = vec_mergel (C1, G1); \
81 G2 = vec_mergeh (D1, H1); \
82 H2 = vec_mergel (D1, H1); \
83 \
84 a = vec_mergeh (A2, E2); \
85 b = vec_mergel (A2, E2); \
86 c = vec_mergeh (B2, F2); \
87 d = vec_mergel (B2, F2); \
88 e = vec_mergeh (C2, G2); \
89 f = vec_mergel (C2, G2); \
90 g = vec_mergeh (D2, H2); \
91 h = vec_mergel (D2, H2); \
92 } while (0)
93
94
95 /** \brief loads unaligned vector \a *src with offset \a offset
96 and returns it */
97 static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
98 {
99 register vector unsigned char first = vec_ld(offset, src);
100 register vector unsigned char second = vec_ld(offset+15, src);
101 register vector unsigned char mask = vec_lvsl(offset, src);
102 return vec_perm(first, second, mask);
103 }
104
105 #endif /* AVCODEC_PPC_UTIL_ALTIVEC_H */