1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AOM_PORTS_MEM_H_ 13 #define AOM_AOM_PORTS_MEM_H_ 14 15 #include "aom/aom_integer.h" 16 #include "config/aom_config.h" 17 18 #if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C) 19 #define DECLARE_ALIGNED(n, typ, val) typ val __attribute__((aligned(n))) 20 #elif defined(_MSC_VER) 21 #define DECLARE_ALIGNED(n, typ, val) __declspec(align(n)) typ val 22 #else 23 #warning No alignment directives known for this compiler. 24 #define DECLARE_ALIGNED(n, typ, val) typ val 25 #endif 26 27 /* Indicates that the usage of the specified variable has been audited to assure 28 * that it's safe to use uninitialized. Silences 'may be used uninitialized' 29 * warnings on gcc. 30 */ 31 #if defined(__GNUC__) && __GNUC__ 32 #define UNINITIALIZED_IS_SAFE(x) x = x 33 #else 34 #define UNINITIALIZED_IS_SAFE(x) x 35 #endif 36 37 #if HAVE_NEON && defined(_MSC_VER) 38 #define __builtin_prefetch(x) 39 #endif 40 41 /* Shift down with rounding for use when n >= 0, value >= 0 */ 42 #define ROUND_POWER_OF_TWO(value, n) (((value) + (((1 << (n)) >> 1))) >> (n)) 43 44 /* Shift down with rounding for signed integers, for use when n >= 0 */ 45 #define ROUND_POWER_OF_TWO_SIGNED(value, n) \ 46 (((value) < 0) ? -ROUND_POWER_OF_TWO(-(value), (n)) \ 47 : ROUND_POWER_OF_TWO((value), (n))) 48 49 /* Shift down with rounding for use when n >= 0, value >= 0 for (64 bit) */ 50 #define ROUND_POWER_OF_TWO_64(value, n) \ 51 (((value) + ((((int64_t)1 << (n)) >> 1))) >> (n)) 52 /* Shift down with rounding for signed integers, for use when n >= 0 (64 bit) */ 53 #define ROUND_POWER_OF_TWO_SIGNED_64(value, n) \ 54 (((value) < 0) ? -ROUND_POWER_OF_TWO_64(-(value), (n)) \ 55 : ROUND_POWER_OF_TWO_64((value), (n))) 56 57 /* shift right or left depending on sign of n */ 58 #define RIGHT_SIGNED_SHIFT(value, n) \ 59 ((n) < 0 ? ((value) << (-(n))) : ((value) >> (n))) 60 61 #define ALIGN_POWER_OF_TWO(value, n) \ 62 (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) 63 64 #define DIVIDE_AND_ROUND(x, y) (((x) + ((y) >> 1)) / (y)) 65 66 #define CONVERT_TO_SHORTPTR(x) ((uint16_t *)(((uintptr_t)(x)) << 1)) 67 #define CONVERT_TO_BYTEPTR(x) ((uint8_t *)(((uintptr_t)(x)) >> 1)) 68 69 /*!\brief force enum to be unsigned 1 byte*/ 70 #define UENUM1BYTE(enumvar) \ 71 ; \ 72 typedef uint8_t enumvar 73 74 /*!\brief force enum to be signed 1 byte*/ 75 #define SENUM1BYTE(enumvar) \ 76 ; \ 77 typedef int8_t enumvar 78 79 /*!\brief force enum to be unsigned 2 byte*/ 80 #define UENUM2BYTE(enumvar) \ 81 ; \ 82 typedef uint16_t enumvar 83 84 /*!\brief force enum to be signed 2 byte*/ 85 #define SENUM2BYTE(enumvar) \ 86 ; \ 87 typedef int16_t enumvar 88 89 /*!\brief force enum to be unsigned 4 byte*/ 90 #define UENUM4BYTE(enumvar) \ 91 ; \ 92 typedef uint32_t enumvar 93 94 /*!\brief force enum to be unsigned 4 byte*/ 95 #define SENUM4BYTE(enumvar) \ 96 ; \ 97 typedef int32_t enumvar 98 99 #endif // AOM_AOM_PORTS_MEM_H_ 100