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 VPX_INLINE unsigned MEM_VALUE_T \
48    mem_get_##end##sz##_aligned(const void *vmem) {\
49    const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
50    return *mem;\
51  }
52
53#define mem_get_sne_aligned_generic(end,sz) \
54  static VPX_INLINE signed MEM_VALUE_T \
55    mem_get_s##end##sz##_aligned(const void *vmem) {\
56    const int##sz##_t *mem = (const int##sz##_t *)vmem;\
57    return *mem;\
58  }
59
60#define mem_get_se_aligned_generic(end,sz) \
61  static VPX_INLINE unsigned MEM_VALUE_T \
62    mem_get_##end##sz##_aligned(const void *vmem) {\
63    const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
64    unsigned MEM_VALUE_T val, raw = *mem;\
65    swap_endian_##sz(val,raw);\
66    return val;\
67  }
68
69#define mem_get_sse_aligned_generic(end,sz) \
70  static VPX_INLINE signed MEM_VALUE_T \
71    mem_get_s##end##sz##_aligned(const void *vmem) {\
72    const int##sz##_t *mem = (const int##sz##_t *)vmem;\
73    unsigned MEM_VALUE_T val, raw = *mem;\
74    swap_endian_##sz##_se(val,raw);\
75    return val;\
76  }
77
78#define mem_put_ne_aligned_generic(end,sz) \
79  static VPX_INLINE void \
80    mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
81    uint##sz##_t *mem = (uint##sz##_t *)vmem;\
82    *mem = (uint##sz##_t)val;\
83  }
84
85#define mem_put_se_aligned_generic(end,sz) \
86  static VPX_INLINE void \
87    mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
88    uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\
89    swap_endian_##sz(raw,val);\
90    *mem = (uint##sz##_t)raw;\
91  }
92
93#include "vpx_config.h"
94#if CONFIG_BIG_ENDIAN
95#define mem_get_be_aligned_generic(sz)  mem_get_ne_aligned_generic(be,sz)
96#define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz)
97#define mem_get_le_aligned_generic(sz)  mem_get_se_aligned_generic(le,sz)
98#define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz)
99#define mem_put_be_aligned_generic(sz)  mem_put_ne_aligned_generic(be,sz)
100#define mem_put_le_aligned_generic(sz)  mem_put_se_aligned_generic(le,sz)
101#else
102#define mem_get_be_aligned_generic(sz)  mem_get_se_aligned_generic(be,sz)
103#define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz)
104#define mem_get_le_aligned_generic(sz)  mem_get_ne_aligned_generic(le,sz)
105#define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz)
106#define mem_put_be_aligned_generic(sz)  mem_put_se_aligned_generic(be,sz)
107#define mem_put_le_aligned_generic(sz)  mem_put_ne_aligned_generic(le,sz)
108#endif
109
110#undef  mem_get_be16_aligned
111#define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned)
112mem_get_be_aligned_generic(16)
113
114#undef  mem_get_be32_aligned
115#define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned)
116mem_get_be_aligned_generic(32)
117
118#undef  mem_get_le16_aligned
119#define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned)
120mem_get_le_aligned_generic(16)
121
122#undef  mem_get_le32_aligned
123#define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned)
124mem_get_le_aligned_generic(32)
125
126#undef  mem_get_sbe16_aligned
127#define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned)
128mem_get_sbe_aligned_generic(16)
129
130#undef  mem_get_sbe32_aligned
131#define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned)
132mem_get_sbe_aligned_generic(32)
133
134#undef  mem_get_sle16_aligned
135#define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned)
136mem_get_sle_aligned_generic(16)
137
138#undef  mem_get_sle32_aligned
139#define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned)
140mem_get_sle_aligned_generic(32)
141
142#undef  mem_put_be16_aligned
143#define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned)
144mem_put_be_aligned_generic(16)
145
146#undef  mem_put_be32_aligned
147#define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned)
148mem_put_be_aligned_generic(32)
149
150#undef  mem_put_le16_aligned
151#define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned)
152mem_put_le_aligned_generic(16)
153
154#undef  mem_put_le32_aligned
155#define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned)
156mem_put_le_aligned_generic(32)
157
158#undef mem_get_ne_aligned_generic
159#undef mem_get_se_aligned_generic
160#undef mem_get_sne_aligned_generic
161#undef mem_get_sse_aligned_generic
162#undef mem_put_ne_aligned_generic
163#undef mem_put_se_aligned_generic
164#undef swap_endian_16
165#undef swap_endian_32
166#undef swap_endian_16_se
167#undef swap_endian_32_se
168
169#endif  // VPX_PORTS_MEM_OPS_ALIGNED_H_
170