ref: 9b70a6dbafa2e17c04f51b12e3abb3d76493732b
dir: /codec/encoder/core/inc/array_stack_align.h/
/*! * \copy * Copyright (c) 2011-2013, Cisco Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * * \file array_stack_align.h * * \brief promised alignment of array pData declaration on stack * multidimensional array can be extended if applicable need * * \date 8/8/2011 Created * 8/12/2011 functionality implementation for multidimensional array * 8/26/2011 better solution with reducing extra memory used, * stack size is adaptively reduced by _tp & _al * ************************************************************************************* */ #ifndef ARRAY_STACK_ALIGN_H__ #define ARRAY_STACK_ALIGN_H__ #include <assert.h> #include "typedefs.h" /* * ENFORCE_STACK_ALIGN_1D: force 1 dimension local pData aligned in stack * _tp: type * _nm: var name * _sz: size * _al: align bytes * auxiliary var: _nm ## _tEmP * NOTE: _al should be power-of-2 and >= sizeof(_tp), before considering to use such macro */ //#define ENFORCE_STACK_ALIGN_1D(_tp, _nm, _sz, _al) \ //_tp _nm ## _tEmP[(_sz)+(_al)-1]; \ //_tp *_nm = _nm ## _tEmP + ((_al)-1); \ //_nm -= (((int32_t)_nm & ((_al)-1))/sizeof(_tp)); /* Another better solution with reducing extra memory used */ #define ENFORCE_STACK_ALIGN_1D(_tp, _nm, _sz, _al) \ assert( ((_al) && !((_al) & ((_al) - 1))) && ((_al) >= sizeof(_tp)) ); /*_al should be power-of-2 and >= sizeof(_tp)*/\ _tp _nm ## _tEmP[(_sz)+(_al)/sizeof(_tp)-1]; \ _tp *_nm = _nm ## _tEmP + ((_al)/sizeof(_tp)-1); \ _nm -= (((uintptr_t)_nm & ((_al)-1))/sizeof(_tp)); /* * ENFORCE_STACK_ALIGN_2D: force 2 dimension local pData aligned in stack * _tp: type * _nm: var name * _cx, _cy: size in x, y dimension * _al: align bytes * auxiliary var: _nm ## _tEmP, _nm ## _tEmP_al * NOTE: _al should be power-of-2 and >= sizeof(_tp), before considering to use such macro */ //#define ENFORCE_STACK_ALIGN_2D(_tp, _nm, _cx, _cy, _al) \ //_tp _nm ## _tEmP[(_cx)*(_cy)+(_al)-1]; \ //_tp *_nm ## _tEmP_al = _nm ## _tEmP + ((_al)-1); \ //_nm ## _tEmP_al -= (((int32_t)_nm ## _tEmP_al & ((_al)-1))/sizeof(_tp)); \ //_tp (*_nm)[(_cy)] = (_tp (*)[(_cy)])_nm ## _tEmP_al; /* Another better solution with reducing extra memory used */ #define ENFORCE_STACK_ALIGN_2D(_tp, _nm, _cx, _cy, _al) \ assert( ((_al) && !((_al) & ((_al) - 1))) && ((_al) >= sizeof(_tp)) ); /*_al should be power-of-2 and >= sizeof(_tp)*/\ _tp _nm ## _tEmP[(_cx)*(_cy)+(_al)/sizeof(_tp)-1]; \ _tp *_nm ## _tEmP_al = _nm ## _tEmP + ((_al)/sizeof(_tp)-1); \ _nm ## _tEmP_al -= (((uintptr_t)_nm ## _tEmP_al & ((_al)-1))/sizeof(_tp)); \ _tp (*_nm)[(_cy)] = (_tp (*)[(_cy)])_nm ## _tEmP_al; /* * ENFORCE_STACK_ALIGN_3D: force 3 dimension local pData aligned in stack * _tp: type * _nm: var name * _cx, _cy, _cz: size in x, y, z dimension * _al: align bytes * auxiliary var: _nm ## _tEmP, _nm ## _tEmP_al * NOTE: _al should be power-of-2 and >= sizeof(_tp), before considering to use such macro */ //#define ENFORCE_STACK_ALIGN_3D(_tp, _nm, _cx, _cy, _cz, _al) \ //_tp _nm ## _tEmP[(_cx)*(_cy)*(_cz)+(_al)-1]; \ //_tp *_nm ## _tEmP_al = _nm ## _tEmP + ((_al)-1); \ //_nm ## _tEmP_al -= (((int32_t)_nm ## _tEmP_al & ((_al)-1))/sizeof(_tp)); \ //_tp (*_nm)[(_cy)][(_cz)] = (_tp (*)[(_cy)][(_cz)])_nm ## _tEmP_al; /* Another better solution with reducing extra memory used */ #define ENFORCE_STACK_ALIGN_3D(_tp, _nm, _cx, _cy, _cz, _al) \ assert( ((_al) && !((_al) & ((_al) - 1))) && ((_al) >= sizeof(_tp)) ); /*_al should be power-of-2 and >= sizeof(_tp)*/\ _tp _nm ## _tEmP[(_cx)*(_cy)*(_cz)+(_al)/sizeof(_tp)-1]; \ _tp *_nm ## _tEmP_al = _nm ## _tEmP + ((_al)/sizeof(_tp)-1); \ _nm ## _tEmP_al -= (((int32_t)_nm ## _tEmP_al & ((_al)-1))/sizeof(_tp)); \ _tp (*_nm)[(_cy)][(_cz)] = (_tp (*)[(_cy)][(_cz)])_nm ## _tEmP_al; #endif//ARRAY_STACK_ALIGN_H__