1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #ifndef VPX_PORTS_MEM_H_ 13 #define VPX_PORTS_MEM_H_ 14 15 #include "vpx_config.h" 16 #include "vpx/vpx_integer.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 */ 42 #define ROUND_POWER_OF_TWO(value, n) \ 43 (((value) + (1 << ((n) - 1))) >> (n)) 44 45 #define ALIGN_POWER_OF_TWO(value, n) \ 46 (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) 47 48 #if CONFIG_VP9_HIGHBITDEPTH 49 #define CONVERT_TO_SHORTPTR(x) ((uint16_t*)(((uintptr_t)x) << 1)) 50 #define CONVERT_TO_BYTEPTR(x) ((uint8_t*)(((uintptr_t)x) >> 1)) 51 #endif // CONFIG_VP9_HIGHBITDEPTH 52 53 #endif // VPX_PORTS_MEM_H_ 54
