mem.h (3717B)
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__) || 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 #if defined(__has_builtin) 28 #define AOM_HAS_BUILTIN(x) __has_builtin(x) 29 #else 30 #define AOM_HAS_BUILTIN(x) 0 31 #endif 32 33 #if !AOM_HAS_BUILTIN(__builtin_prefetch) && !defined(__GNUC__) 34 #define __builtin_prefetch(x) 35 #endif 36 37 /* Shift down with rounding for use when n >= 0. Usually value >= 0, but the 38 * macro can be used with a negative value if the direction of rounding is 39 * acceptable. 40 */ 41 #define ROUND_POWER_OF_TWO(value, n) (((value) + (((1 << (n)) >> 1))) >> (n)) 42 43 /* Shift down with rounding for signed integers, for use when n >= 0 */ 44 #define ROUND_POWER_OF_TWO_SIGNED(value, n) \ 45 (((value) < 0) ? -ROUND_POWER_OF_TWO(-(value), (n)) \ 46 : ROUND_POWER_OF_TWO((value), (n))) 47 48 /* Shift down with rounding for use when n >= 0 (64-bit value). Usually 49 * value >= 0, but the macro can be used with a negative value if the direction 50 * of rounding is acceptable. 51 */ 52 #define ROUND_POWER_OF_TWO_64(value, n) \ 53 (((value) + ((((int64_t)1 << (n)) >> 1))) >> (n)) 54 /* Shift down with rounding for signed integers, for use when n >= 0 (64-bit 55 * value) 56 */ 57 #define ROUND_POWER_OF_TWO_SIGNED_64(value, n) \ 58 (((value) < 0) ? -ROUND_POWER_OF_TWO_64(-(value), (n)) \ 59 : ROUND_POWER_OF_TWO_64((value), (n))) 60 61 /* Shift down with ceil() for use when n >= 0 and value >= 0.*/ 62 #define CEIL_POWER_OF_TWO(value, n) (((value) + (1 << (n)) - 1) >> (n)) 63 64 /* shift right or left depending on sign of n */ 65 #define RIGHT_SIGNED_SHIFT(value, n) \ 66 ((n) < 0 ? ((value) << (-(n))) : ((value) >> (n))) 67 68 #define ALIGN_POWER_OF_TWO(value, n) \ 69 (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) 70 #define ALIGN_POWER_OF_TWO_UNSIGNED(value, n) \ 71 (((value) + ((1u << (n)) - 1)) & ~((1u << (n)) - 1)) 72 73 #define DIVIDE_AND_ROUND(x, y) (((x) + ((y) >> 1)) / (y)) 74 75 #define CONVERT_TO_SHORTPTR(x) ((uint16_t *)(((uintptr_t)(x)) << 1)) 76 #define CONVERT_TO_BYTEPTR(x) ((uint8_t *)(((uintptr_t)(x)) >> 1)) 77 78 /*!\brief force enum to be unsigned 1 byte*/ 79 #define UENUM1BYTE(enumvar) \ 80 ; \ 81 typedef uint8_t enumvar 82 83 /*!\brief force enum to be signed 1 byte*/ 84 #define SENUM1BYTE(enumvar) \ 85 ; \ 86 typedef int8_t enumvar 87 88 /*!\brief force enum to be unsigned 2 byte*/ 89 #define UENUM2BYTE(enumvar) \ 90 ; \ 91 typedef uint16_t enumvar 92 93 /*!\brief force enum to be signed 2 byte*/ 94 #define SENUM2BYTE(enumvar) \ 95 ; \ 96 typedef int16_t enumvar 97 98 /*!\brief force enum to be unsigned 4 byte*/ 99 #define UENUM4BYTE(enumvar) \ 100 ; \ 101 typedef uint32_t enumvar 102 103 /*!\brief force enum to be unsigned 4 byte*/ 104 #define SENUM4BYTE(enumvar) \ 105 ; \ 106 typedef int32_t enumvar 107 108 #endif // AOM_AOM_PORTS_MEM_H_