112854Sgabeblack@google.com/***************************************************************************** 212854Sgabeblack@google.com 312854Sgabeblack@google.com Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 412854Sgabeblack@google.com more contributor license agreements. See the NOTICE file distributed 512854Sgabeblack@google.com with this work for additional information regarding copyright ownership. 612854Sgabeblack@google.com Accellera licenses this file to you under the Apache License, Version 2.0 712854Sgabeblack@google.com (the "License"); you may not use this file except in compliance with the 812854Sgabeblack@google.com License. You may obtain a copy of the License at 912854Sgabeblack@google.com 1012854Sgabeblack@google.com http://www.apache.org/licenses/LICENSE-2.0 1112854Sgabeblack@google.com 1212854Sgabeblack@google.com Unless required by applicable law or agreed to in writing, software 1312854Sgabeblack@google.com distributed under the License is distributed on an "AS IS" BASIS, 1412854Sgabeblack@google.com WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 1512854Sgabeblack@google.com implied. See the License for the specific language governing 1612854Sgabeblack@google.com permissions and limitations under the License. 1712854Sgabeblack@google.com 1812854Sgabeblack@google.com *****************************************************************************/ 1912854Sgabeblack@google.com 2012854Sgabeblack@google.com/***************************************************************************** 2112854Sgabeblack@google.com 2212854Sgabeblack@google.com scfx_mant.cpp - 2312854Sgabeblack@google.com 2412854Sgabeblack@google.com Original Author: Robert Graulich, Synopsys, Inc. 2512854Sgabeblack@google.com Martin Janssen, Synopsys, Inc. 2612854Sgabeblack@google.com 2712854Sgabeblack@google.com *****************************************************************************/ 2812854Sgabeblack@google.com 2912854Sgabeblack@google.com/***************************************************************************** 3012854Sgabeblack@google.com 3112854Sgabeblack@google.com MODIFICATION LOG - modifiers, enter your name, affiliation, date and 3212854Sgabeblack@google.com changes you are making here. 3312854Sgabeblack@google.com 3412854Sgabeblack@google.com Name, Affiliation, Date: 3512854Sgabeblack@google.com Description of Modification: 3612854Sgabeblack@google.com 3712854Sgabeblack@google.com *****************************************************************************/ 3812854Sgabeblack@google.com 3912854Sgabeblack@google.com 4012854Sgabeblack@google.com// $Log: scfx_mant.cpp,v $ 4112854Sgabeblack@google.com// Revision 1.1.1.1 2006/12/15 20:20:04 acg 4212854Sgabeblack@google.com// SystemC 2.3 4312854Sgabeblack@google.com// 4412854Sgabeblack@google.com// Revision 1.3 2006/01/13 18:53:58 acg 4512854Sgabeblack@google.com// Andy Goodrich: added $Log command so that CVS comments are reproduced in 4612854Sgabeblack@google.com// the source. 4712854Sgabeblack@google.com// 4812854Sgabeblack@google.com 4912854Sgabeblack@google.com#include "systemc/ext/dt/fx/scfx_mant.hh" 5012854Sgabeblack@google.com 5112854Sgabeblack@google.comnamespace sc_dt 5212854Sgabeblack@google.com{ 5312854Sgabeblack@google.com 5412854Sgabeblack@google.com// ---------------------------------------------------------------------------- 5512854Sgabeblack@google.com// word memory management 5612854Sgabeblack@google.com// ---------------------------------------------------------------------------- 5712854Sgabeblack@google.com 5812854Sgabeblack@google.comclass word_list // Entry in free_words bucket. 5912854Sgabeblack@google.com{ 6012854Sgabeblack@google.com public: 6112854Sgabeblack@google.com word_list *m_next_p; 6212854Sgabeblack@google.com}; 6312854Sgabeblack@google.com 6412854Sgabeblack@google.comstatic inline unsigned 6512854Sgabeblack@google.comnext_pow2_index(std::size_t size) 6612854Sgabeblack@google.com{ 6712854Sgabeblack@google.com unsigned index = scfx_find_msb(size); 6812854Sgabeblack@google.com // If this was a power of 2 we are one bucket too low. 6912854Sgabeblack@google.com if (~(UINT64_ONE << index) & size) 7012854Sgabeblack@google.com index++; 7112854Sgabeblack@google.com // If this is a 64-bit machine and we are using 32-bit words go down 7212854Sgabeblack@google.com // one slot size, as all the slots are 2x in size. 7312854Sgabeblack@google.com if (index != 0 && (sizeof(word_list) != sizeof(word))) { 7412854Sgabeblack@google.com index -= 1; 7512854Sgabeblack@google.com } 7612854Sgabeblack@google.com return index; 7712854Sgabeblack@google.com} 7812854Sgabeblack@google.com 7912854Sgabeblack@google.comstatic word_list *free_words[32] = { 0 }; 8012854Sgabeblack@google.com 8112854Sgabeblack@google.comword * 8212854Sgabeblack@google.comscfx_mant::alloc_word(std::size_t size) 8312854Sgabeblack@google.com{ 8412854Sgabeblack@google.com const int ALLOC_SIZE = 128; 8512854Sgabeblack@google.com 8612854Sgabeblack@google.com unsigned slot_index = next_pow2_index(size); 8712854Sgabeblack@google.com unsigned alloc_size = (UINT64_ONE << slot_index); 8812854Sgabeblack@google.com 8912854Sgabeblack@google.com word_list*& slot = free_words[slot_index]; 9012854Sgabeblack@google.com 9112854Sgabeblack@google.com if (!slot) { 9212854Sgabeblack@google.com slot = new word_list[ALLOC_SIZE * alloc_size]; 9312854Sgabeblack@google.com unsigned i; 9412854Sgabeblack@google.com for (i = 0; i < alloc_size * (ALLOC_SIZE - 1) ; i += alloc_size) { 9512854Sgabeblack@google.com slot[i].m_next_p = &slot[i + alloc_size]; 9612854Sgabeblack@google.com } 9712854Sgabeblack@google.com slot[i].m_next_p = 0; 9812854Sgabeblack@google.com } 9912854Sgabeblack@google.com 10012854Sgabeblack@google.com word *result = (word *)slot; 10112854Sgabeblack@google.com free_words[slot_index] = slot[0].m_next_p; 10212854Sgabeblack@google.com return result; 10312854Sgabeblack@google.com} 10412854Sgabeblack@google.com 10512854Sgabeblack@google.comvoid 10612854Sgabeblack@google.comscfx_mant::free_word(word *array, std::size_t size) 10712854Sgabeblack@google.com{ 10812854Sgabeblack@google.com if (array && size) { 10912854Sgabeblack@google.com int slot_index = next_pow2_index(size); 11012854Sgabeblack@google.com word_list *wl_p = (word_list *)array; 11112854Sgabeblack@google.com 11212854Sgabeblack@google.com wl_p->m_next_p = free_words[slot_index]; 11312854Sgabeblack@google.com free_words[slot_index] = wl_p; 11412854Sgabeblack@google.com } 11512854Sgabeblack@google.com} 11612854Sgabeblack@google.com 11712854Sgabeblack@google.com} // namespace sc_dt 118