| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #ifndef AOM_PORTS_MEM_H_ |
| #define AOM_PORTS_MEM_H_ |
| |
| #include "aom_config.h" |
| #include "aom/aom_integer.h" |
| |
| #if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C) |
| #define DECLARE_ALIGNED(n, typ, val) typ val __attribute__((aligned(n))) |
| #elif defined(_MSC_VER) |
| #define DECLARE_ALIGNED(n, typ, val) __declspec(align(n)) typ val |
| #else |
| #warning No alignment directives known for this compiler. |
| #define DECLARE_ALIGNED(n, typ, val) typ val |
| #endif |
| |
| /* Indicates that the usage of the specified variable has been audited to assure |
| * that it's safe to use uninitialized. Silences 'may be used uninitialized' |
| * warnings on gcc. |
| */ |
| #if defined(__GNUC__) && __GNUC__ |
| #define UNINITIALIZED_IS_SAFE(x) x = x |
| #else |
| #define UNINITIALIZED_IS_SAFE(x) x |
| #endif |
| |
| #if HAVE_NEON && defined(_MSC_VER) |
| #define __builtin_prefetch(x) |
| #endif |
| |
| /* Shift down with rounding for use when n >= 0, value >= 0 */ |
| #define ROUND_POWER_OF_TWO(value, n) (((value) + (((1 << (n)) >> 1))) >> (n)) |
| |
| /* Shift down with rounding for signed integers, for use when n >= 0 */ |
| #define ROUND_POWER_OF_TWO_SIGNED(value, n) \ |
| (((value) < 0) ? -ROUND_POWER_OF_TWO(-(value), (n)) \ |
| : ROUND_POWER_OF_TWO((value), (n))) |
| |
| /* Shift down with rounding for use when n >= 0, value >= 0 for (64 bit) */ |
| #define ROUND_POWER_OF_TWO_64(value, n) \ |
| (((value) + ((((int64_t)1 << (n)) >> 1))) >> (n)) |
| /* Shift down with rounding for signed integers, for use when n >= 0 (64 bit) */ |
| #define ROUND_POWER_OF_TWO_SIGNED_64(value, n) \ |
| (((value) < 0) ? -ROUND_POWER_OF_TWO_64(-(value), (n)) \ |
| : ROUND_POWER_OF_TWO_64((value), (n))) |
| |
| /* shift right or left depending on sign of n */ |
| #define RIGHT_SIGNED_SHIFT(value, n) \ |
| ((n) < 0 ? ((value) << (-(n))) : ((value) >> (n))) |
| |
| #define ALIGN_POWER_OF_TWO(value, n) \ |
| (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) |
| |
| #define CONVERT_TO_SHORTPTR(x) ((uint16_t *)(((uintptr_t)(x)) << 1)) |
| #define CONVERT_TO_BYTEPTR(x) ((uint8_t *)(((uintptr_t)(x)) >> 1)) |
| |
| #endif // AOM_PORTS_MEM_H_ |