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- /*
- * 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_AOM_PORTS_MEM_H_
- #define AOM_AOM_PORTS_MEM_H_
- #include "aom/aom_integer.h"
- #include "config/aom_config.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. Usually value >= 0, but the
- * macro can be used with a negative value if the direction of rounding is
- * acceptable.
- */
- #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 (64-bit value). Usually
- * value >= 0, but the macro can be used with a negative value if the direction
- * of rounding is acceptable.
- */
- #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
- * value)
- */
- #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 down with ceil() for use when n >= 0 and value >= 0.*/
- #define CEIL_POWER_OF_TWO(value, n) (((value) + (1 << (n)) - 1) >> (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 ALIGN_POWER_OF_TWO_UNSIGNED(value, n) \
- (((value) + ((1u << (n)) - 1)) & ~((1u << (n)) - 1))
- #define DIVIDE_AND_ROUND(x, y) (((x) + ((y) >> 1)) / (y))
- #define CONVERT_TO_SHORTPTR(x) ((uint16_t *)(((uintptr_t)(x)) << 1))
- #define CONVERT_TO_BYTEPTR(x) ((uint8_t *)(((uintptr_t)(x)) >> 1))
- /*!\brief force enum to be unsigned 1 byte*/
- #define UENUM1BYTE(enumvar) \
- ; \
- typedef uint8_t enumvar
- /*!\brief force enum to be signed 1 byte*/
- #define SENUM1BYTE(enumvar) \
- ; \
- typedef int8_t enumvar
- /*!\brief force enum to be unsigned 2 byte*/
- #define UENUM2BYTE(enumvar) \
- ; \
- typedef uint16_t enumvar
- /*!\brief force enum to be signed 2 byte*/
- #define SENUM2BYTE(enumvar) \
- ; \
- typedef int16_t enumvar
- /*!\brief force enum to be unsigned 4 byte*/
- #define UENUM4BYTE(enumvar) \
- ; \
- typedef uint32_t enumvar
- /*!\brief force enum to be unsigned 4 byte*/
- #define SENUM4BYTE(enumvar) \
- ; \
- typedef int32_t enumvar
- #endif // AOM_AOM_PORTS_MEM_H_
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