1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef VPX_PORTS_MEM_OPS_ALIGNED_H_
12#define VPX_PORTS_MEM_OPS_ALIGNED_H_
13
14#include "vpx/vpx_integer.h"
15
16/* \file
17 * \brief Provides portable memory access primitives for operating on aligned
18 *        data
19 *
20 * This file is split from mem_ops.h for easier maintenance. See mem_ops.h
21 * for a more detailed description of these primitives.
22 */
23#ifndef INCLUDED_BY_MEM_OPS_H
24#error Include mem_ops.h, not mem_ops_aligned.h directly.
25#endif
26
27/* Architectures that provide instructions for doing this byte swapping
28 * could redefine these macros.
29 */
30#define swap_endian_16(val,raw) do {\
31    val = ((raw>>8) & 0x00ff) \
32          | ((raw<<8) & 0xff00);\
33  } while(0)
34#define swap_endian_32(val,raw) do {\
35    val = ((raw>>24) & 0x000000ff) \
36          | ((raw>>8)  & 0x0000ff00) \
37          | ((raw<<8)  & 0x00ff0000) \
38          | ((raw<<24) & 0xff000000); \
39  } while(0)
40#define swap_endian_16_se(val,raw) do {\
41    swap_endian_16(val,raw);\
42    val = ((val << 16) >> 16);\
43  } while(0)
44#define swap_endian_32_se(val,raw) swap_endian_32(val,raw)
45
46#define mem_get_ne_aligned_generic(end,sz) \
47  static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\
48    const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
49    return *mem;\
50  }
51
52#define mem_get_sne_aligned_generic(end,sz) \
53  static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\
54    const int##sz##_t *mem = (const int##sz##_t *)vmem;\
55    return *mem;\
56  }
57
58#define mem_get_se_aligned_generic(end,sz) \
59  static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\
60    const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
61    unsigned MEM_VALUE_T val, raw = *mem;\
62    swap_endian_##sz(val,raw);\
63    return val;\
64  }
65
66#define mem_get_sse_aligned_generic(end,sz) \
67  static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\
68    const int##sz##_t *mem = (const int##sz##_t *)vmem;\
69    unsigned MEM_VALUE_T val, raw = *mem;\
70    swap_endian_##sz##_se(val,raw);\
71    return val;\
72  }
73
74#define mem_put_ne_aligned_generic(end,sz) \
75  static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
76    uint##sz##_t *mem = (uint##sz##_t *)vmem;\
77    *mem = (uint##sz##_t)val;\
78  }
79
80#define mem_put_se_aligned_generic(end,sz) \
81  static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
82    uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\
83    swap_endian_##sz(raw,val);\
84    *mem = (uint##sz##_t)raw;\
85  }
86
87#include "vpx_config.h"
88#if CONFIG_BIG_ENDIAN
89#define mem_get_be_aligned_generic(sz)  mem_get_ne_aligned_generic(be,sz)
90#define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz)
91#define mem_get_le_aligned_generic(sz)  mem_get_se_aligned_generic(le,sz)
92#define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz)
93#define mem_put_be_aligned_generic(sz)  mem_put_ne_aligned_generic(be,sz)
94#define mem_put_le_aligned_generic(sz)  mem_put_se_aligned_generic(le,sz)
95#else
96#define mem_get_be_aligned_generic(sz)  mem_get_se_aligned_generic(be,sz)
97#define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz)
98#define mem_get_le_aligned_generic(sz)  mem_get_ne_aligned_generic(le,sz)
99#define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz)
100#define mem_put_be_aligned_generic(sz)  mem_put_se_aligned_generic(be,sz)
101#define mem_put_le_aligned_generic(sz)  mem_put_ne_aligned_generic(le,sz)
102#endif
103
104#undef  mem_get_be16_aligned
105#define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned)
106mem_get_be_aligned_generic(16)
107
108#undef  mem_get_be32_aligned
109#define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned)
110mem_get_be_aligned_generic(32)
111
112#undef  mem_get_le16_aligned
113#define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned)
114mem_get_le_aligned_generic(16)
115
116#undef  mem_get_le32_aligned
117#define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned)
118mem_get_le_aligned_generic(32)
119
120#undef  mem_get_sbe16_aligned
121#define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned)
122mem_get_sbe_aligned_generic(16)
123
124#undef  mem_get_sbe32_aligned
125#define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned)
126mem_get_sbe_aligned_generic(32)
127
128#undef  mem_get_sle16_aligned
129#define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned)
130mem_get_sle_aligned_generic(16)
131
132#undef  mem_get_sle32_aligned
133#define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned)
134mem_get_sle_aligned_generic(32)
135
136#undef  mem_put_be16_aligned
137#define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned)
138mem_put_be_aligned_generic(16)
139
140#undef  mem_put_be32_aligned
141#define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned)
142mem_put_be_aligned_generic(32)
143
144#undef  mem_put_le16_aligned
145#define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned)
146mem_put_le_aligned_generic(16)
147
148#undef  mem_put_le32_aligned
149#define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned)
150mem_put_le_aligned_generic(32)
151
152#undef mem_get_ne_aligned_generic
153#undef mem_get_se_aligned_generic
154#undef mem_get_sne_aligned_generic
155#undef mem_get_sse_aligned_generic
156#undef mem_put_ne_aligned_generic
157#undef mem_put_se_aligned_generic
158#undef swap_endian_16
159#undef swap_endian_32
160#undef swap_endian_16_se
161#undef swap_endian_32_se
162
163#endif  // VPX_PORTS_MEM_OPS_ALIGNED_H_
164