ref: a736bf6bfb66d08848b114344731c4e04ac5066d
dir: /vpx_ports/mem.h/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VPX_PORTS_MEM_H_
#define VPX_PORTS_MEM_H_
#include "vpx_config.h"
#include "vpx/vpx_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 */
#define ROUND_POWER_OF_TWO(value, n) \
(((value) + (1 << ((n) - 1))) >> (n))
#define ALIGN_POWER_OF_TWO(value, n) \
(((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))
#if CONFIG_VP9_HIGHBITDEPTH
#define CONVERT_TO_SHORTPTR(x) ((uint16_t*)(((uintptr_t)x) << 1))
#define CONVERT_TO_BYTEPTR(x) ((uint8_t*)(((uintptr_t)x) >> 1))
#endif // CONFIG_VP9_HIGHBITDEPTH
#endif // VPX_PORTS_MEM_H_