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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_H_
12 #define VPX_PORTS_MEM_H_
13 
14 #include "vpx_config.h"
15 #include "vpx/vpx_integer.h"
16 
17 #if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C)
18 #define DECLARE_ALIGNED(n, typ, val) typ val __attribute__((aligned(n)))
19 #elif defined(_MSC_VER)
20 #define DECLARE_ALIGNED(n, typ, val) __declspec(align(n)) typ val
21 #else
22 #warning No alignment directives known for this compiler.
23 #define DECLARE_ALIGNED(n, typ, val) typ val
24 #endif
25 
26 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(_WIN32)
27 #define DECLARE_PROTECTED(decl) decl __attribute__((visibility("protected")))
28 #else
29 #define DECLARE_PROTECTED(decl) decl
30 #endif
31 
32 #if HAVE_NEON && defined(_MSC_VER)
33 #define __builtin_prefetch(x)
34 #endif
35 
36 /* Shift down with rounding */
37 #define ROUND_POWER_OF_TWO(value, n) (((value) + (1 << ((n)-1))) >> (n))
38 #define ROUND64_POWER_OF_TWO(value, n) (((value) + (1ULL << ((n)-1))) >> (n))
39 
40 #define ALIGN_POWER_OF_TWO(value, n) \
41   (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))
42 
43 #define CONVERT_TO_SHORTPTR(x) ((uint16_t *)(((uintptr_t)(x)) << 1))
44 #define CAST_TO_SHORTPTR(x) ((uint16_t *)((uintptr_t)(x)))
45 #if CONFIG_VP9_HIGHBITDEPTH
46 #define CONVERT_TO_BYTEPTR(x) ((uint8_t *)(((uintptr_t)(x)) >> 1))
47 #define CAST_TO_BYTEPTR(x) ((uint8_t *)((uintptr_t)(x)))
48 #endif  // CONFIG_VP9_HIGHBITDEPTH
49 
50 #if !defined(__has_feature)
51 #define __has_feature(x) 0
52 #endif  // !defined(__has_feature)
53 
54 #if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
55 #define VPX_WITH_ASAN 1
56 #else
57 #define VPX_WITH_ASAN 0
58 #endif  // __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
59 
60 #endif  // VPX_PORTS_MEM_H_
61