110448Snilay@cs.wisc.edu/* Copyright (c) 2012 Massachusetts Institute of Technology 210448Snilay@cs.wisc.edu * 310448Snilay@cs.wisc.edu * Permission is hereby granted, free of charge, to any person obtaining a copy 410448Snilay@cs.wisc.edu * of this software and associated documentation files (the "Software"), to deal 510448Snilay@cs.wisc.edu * in the Software without restriction, including without limitation the rights 610448Snilay@cs.wisc.edu * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 710448Snilay@cs.wisc.edu * copies of the Software, and to permit persons to whom the Software is 810448Snilay@cs.wisc.edu * furnished to do so, subject to the following conditions: 910448Snilay@cs.wisc.edu * 1010448Snilay@cs.wisc.edu * The above copyright notice and this permission notice shall be included in 1110448Snilay@cs.wisc.edu * all copies or substantial portions of the Software. 1210448Snilay@cs.wisc.edu * 1310448Snilay@cs.wisc.edu * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1410448Snilay@cs.wisc.edu * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1510448Snilay@cs.wisc.edu * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 1610448Snilay@cs.wisc.edu * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 1710448Snilay@cs.wisc.edu * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 1810448Snilay@cs.wisc.edu * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 1910448Snilay@cs.wisc.edu * THE SOFTWARE. 2010448Snilay@cs.wisc.edu */ 2110448Snilay@cs.wisc.edu 2210447Snilay@cs.wisc.edu#include "model/std_cells/StdCellLib.h" 2310447Snilay@cs.wisc.edu 2410447Snilay@cs.wisc.edu#include <cmath> 2510447Snilay@cs.wisc.edu 2610447Snilay@cs.wisc.edu#include "model/std_cells/StdCell.h" 2710447Snilay@cs.wisc.edu#include "model/std_cells/INV.h" 2810447Snilay@cs.wisc.edu#include "model/ModelGen.h" 2910447Snilay@cs.wisc.edu 3010447Snilay@cs.wisc.edunamespace DSENT 3110447Snilay@cs.wisc.edu{ 3210447Snilay@cs.wisc.edu using std::pow; 3310447Snilay@cs.wisc.edu 3410447Snilay@cs.wisc.edu StdCellLib::StdCellLib(TechModel* tech_model_) 3510447Snilay@cs.wisc.edu : m_tech_model_(tech_model_) 3610447Snilay@cs.wisc.edu { 3710447Snilay@cs.wisc.edu m_std_cell_cache_ = new Map<double>(); 3810447Snilay@cs.wisc.edu ASSERT((m_tech_model_ != NULL), "[Error] StdCellLib -> tech_model is NULL"); 3910447Snilay@cs.wisc.edu createLib(); 4010447Snilay@cs.wisc.edu } 4110447Snilay@cs.wisc.edu 4210447Snilay@cs.wisc.edu StdCellLib::~StdCellLib() 4310447Snilay@cs.wisc.edu { 4410447Snilay@cs.wisc.edu delete m_std_cell_cache_; 4510447Snilay@cs.wisc.edu } 4610447Snilay@cs.wisc.edu 4710447Snilay@cs.wisc.edu const TechModel* StdCellLib::getTechModel() const 4810447Snilay@cs.wisc.edu { 4910447Snilay@cs.wisc.edu return m_tech_model_; 5010447Snilay@cs.wisc.edu } 5110447Snilay@cs.wisc.edu 5210447Snilay@cs.wisc.edu StdCell* StdCellLib::createStdCell(const String& std_cell_name_, const String& instance_name_) const 5310447Snilay@cs.wisc.edu { 5410447Snilay@cs.wisc.edu // Create the standard cell 5510447Snilay@cs.wisc.edu StdCell* created_cell = ModelGen::createStdCell(std_cell_name_, instance_name_, getTechModel()); 5610447Snilay@cs.wisc.edu // Grab the variants of each standard cell 5710447Snilay@cs.wisc.edu String driving_strength_str = getTechModel()->get("StdCell->AvailableSizes"); 5810447Snilay@cs.wisc.edu // Set library properties for the standard cell 5910447Snilay@cs.wisc.edu created_cell->setPToNRatio(getPToNRatio()); 6010447Snilay@cs.wisc.edu created_cell->setActiveHeight(getActiveHeight()); 6110447Snilay@cs.wisc.edu created_cell->setTotalHeight(getTotalHeight()); 6210447Snilay@cs.wisc.edu created_cell->setAvailableDrivingStrengths(driving_strength_str); 6310447Snilay@cs.wisc.edu return created_cell; 6410447Snilay@cs.wisc.edu } 6510447Snilay@cs.wisc.edu 6610447Snilay@cs.wisc.edu // Get PMOS to NMOS ratio 6710447Snilay@cs.wisc.edu double StdCellLib::getPToNRatio() const 6810447Snilay@cs.wisc.edu { 6910447Snilay@cs.wisc.edu return m_p_to_n_ratio_; 7010447Snilay@cs.wisc.edu } 7110447Snilay@cs.wisc.edu 7210447Snilay@cs.wisc.edu void StdCellLib::setPToNRatio(double p_to_n_ratio_) 7310447Snilay@cs.wisc.edu { 7410447Snilay@cs.wisc.edu m_p_to_n_ratio_ = p_to_n_ratio_; 7510447Snilay@cs.wisc.edu } 7610447Snilay@cs.wisc.edu 7710447Snilay@cs.wisc.edu // Get height of the standard cell taken by active transistors 7810447Snilay@cs.wisc.edu double StdCellLib::getActiveHeight() const 7910447Snilay@cs.wisc.edu { 8010447Snilay@cs.wisc.edu return m_active_height_; 8110447Snilay@cs.wisc.edu } 8210447Snilay@cs.wisc.edu 8310447Snilay@cs.wisc.edu void StdCellLib::setActiveHeight(double active_height_) 8410447Snilay@cs.wisc.edu { 8510447Snilay@cs.wisc.edu m_active_height_ = active_height_; 8610447Snilay@cs.wisc.edu } 8710447Snilay@cs.wisc.edu 8810447Snilay@cs.wisc.edu // Get total height of the standard cell including overheads 8910447Snilay@cs.wisc.edu double StdCellLib::getTotalHeight() const 9010447Snilay@cs.wisc.edu { 9110447Snilay@cs.wisc.edu return m_total_height_; 9210447Snilay@cs.wisc.edu } 9310447Snilay@cs.wisc.edu 9410447Snilay@cs.wisc.edu void StdCellLib::setTotalHeight(double total_height_) 9510447Snilay@cs.wisc.edu { 9610447Snilay@cs.wisc.edu m_total_height_ = total_height_; 9710447Snilay@cs.wisc.edu } 9810447Snilay@cs.wisc.edu 9910447Snilay@cs.wisc.edu void StdCellLib::createLib() 10010447Snilay@cs.wisc.edu { 10110447Snilay@cs.wisc.edu Log::printLine("Standard cell library creation for tech model " + getTechModel()->get("Name")); 10210447Snilay@cs.wisc.edu 10310447Snilay@cs.wisc.edu // Get technology parameters 10410447Snilay@cs.wisc.edu double nmos_eff_res = getTechModel()->get("Nmos->EffResWidth"); 10510447Snilay@cs.wisc.edu double pmos_eff_res = getTechModel()->get("Pmos->EffResWidth"); 10610447Snilay@cs.wisc.edu double gate_min_width = getTechModel()->get("Gate->MinWidth"); 10710447Snilay@cs.wisc.edu 10810447Snilay@cs.wisc.edu // Create standard cell common parameters 10910447Snilay@cs.wisc.edu double pn_ratio = pmos_eff_res / nmos_eff_res; 11010447Snilay@cs.wisc.edu double nmos_unit_width = gate_min_width; 11110447Snilay@cs.wisc.edu double pmos_unit_width = gate_min_width * pn_ratio; 11210447Snilay@cs.wisc.edu 11310447Snilay@cs.wisc.edu // Derive the height of each cell in the standard cell library, as well as the max Nmos and Pmos widths 11410447Snilay@cs.wisc.edu double std_cell_total_height = getTechModel()->get("StdCell->Tracks").toDouble() * 11510447Snilay@cs.wisc.edu (getTechModel()->get("Wire->Metal1->MinWidth").toDouble() + getTechModel()->get("Wire->Metal1->MinSpacing").toDouble()); 11610447Snilay@cs.wisc.edu double std_cell_active_height = std_cell_total_height / getTechModel()->get("StdCell->HeightOverheadFactor").toDouble(); 11710447Snilay@cs.wisc.edu 11810447Snilay@cs.wisc.edu Log::printLine("Standard cell P-to-N ratio (Beta) = " + (String) pn_ratio); 11910447Snilay@cs.wisc.edu Log::printLine("Standard cell NMOS unit width = " + (String) nmos_unit_width); 12010447Snilay@cs.wisc.edu Log::printLine("Standard cell PMOS unit width = " + (String) pmos_unit_width); 12110447Snilay@cs.wisc.edu Log::printLine("Standard cell active height = " + (String) std_cell_active_height); 12210447Snilay@cs.wisc.edu Log::printLine("Standard cell total height = " + (String) std_cell_total_height); 12310447Snilay@cs.wisc.edu 12410447Snilay@cs.wisc.edu setPToNRatio(pn_ratio); 12510447Snilay@cs.wisc.edu setActiveHeight(std_cell_active_height); 12610447Snilay@cs.wisc.edu setTotalHeight(std_cell_total_height); 12710447Snilay@cs.wisc.edu 12810447Snilay@cs.wisc.edu const vector<String>& cell_sizes = getTechModel()->get("StdCell->AvailableSizes").split("[,]"); 12910447Snilay@cs.wisc.edu // Create cached standard cells 13010447Snilay@cs.wisc.edu for (unsigned int i = 0; i < cell_sizes.size(); ++i) 13110447Snilay@cs.wisc.edu { 13210447Snilay@cs.wisc.edu StdCell* inv = createStdCell("INV", "CachedINV"); 13310447Snilay@cs.wisc.edu inv->cacheStdCell(this, cell_sizes[i].toDouble()); 13410447Snilay@cs.wisc.edu delete inv; 13510447Snilay@cs.wisc.edu 13610447Snilay@cs.wisc.edu StdCell* nand2 = createStdCell("NAND2", "CachedNAND2"); 13710447Snilay@cs.wisc.edu nand2->cacheStdCell(this, cell_sizes[i].toDouble()); 13810447Snilay@cs.wisc.edu delete nand2; 13910447Snilay@cs.wisc.edu 14010447Snilay@cs.wisc.edu StdCell* nor2 = createStdCell("NOR2", "CachedNOR2"); 14110447Snilay@cs.wisc.edu nor2->cacheStdCell(this, cell_sizes[i].toDouble()); 14210447Snilay@cs.wisc.edu delete nor2; 14310447Snilay@cs.wisc.edu 14410447Snilay@cs.wisc.edu StdCell* mux2 = createStdCell("MUX2", "CachedMUX2"); 14510447Snilay@cs.wisc.edu mux2->cacheStdCell(this, cell_sizes[i].toDouble()); 14610447Snilay@cs.wisc.edu delete mux2; 14710447Snilay@cs.wisc.edu 14810447Snilay@cs.wisc.edu StdCell* xor2 = createStdCell("XOR2", "CachedXOR2"); 14910447Snilay@cs.wisc.edu xor2->cacheStdCell(this, cell_sizes[i].toDouble()); 15010447Snilay@cs.wisc.edu delete xor2; 15110447Snilay@cs.wisc.edu 15210447Snilay@cs.wisc.edu StdCell* addf = createStdCell("ADDF", "CachedADDF"); 15310447Snilay@cs.wisc.edu addf->cacheStdCell(this, cell_sizes[i].toDouble()); 15410447Snilay@cs.wisc.edu delete addf; 15510447Snilay@cs.wisc.edu 15610447Snilay@cs.wisc.edu StdCell* dffq = createStdCell("DFFQ", "CachedDFFQ"); 15710447Snilay@cs.wisc.edu dffq->cacheStdCell(this, cell_sizes[i].toDouble()); 15810447Snilay@cs.wisc.edu delete dffq; 15910447Snilay@cs.wisc.edu 16010447Snilay@cs.wisc.edu StdCell* latq = createStdCell("LATQ", "CachedLATQ"); 16110447Snilay@cs.wisc.edu latq->cacheStdCell(this, cell_sizes[i].toDouble()); 16210447Snilay@cs.wisc.edu delete latq; 16310447Snilay@cs.wisc.edu 16410447Snilay@cs.wisc.edu StdCell* or2 = createStdCell("OR2", "CachedOR2"); 16510447Snilay@cs.wisc.edu or2->cacheStdCell(this, cell_sizes[i].toDouble()); 16610447Snilay@cs.wisc.edu delete or2; 16710447Snilay@cs.wisc.edu 16810447Snilay@cs.wisc.edu StdCell* and2 = createStdCell("AND2", "CachedAND2"); 16910447Snilay@cs.wisc.edu and2->cacheStdCell(this, cell_sizes[i].toDouble()); 17010447Snilay@cs.wisc.edu delete and2; 17110447Snilay@cs.wisc.edu } 17210447Snilay@cs.wisc.edu 17310447Snilay@cs.wisc.edu Log::printLine("Standard cell library creation - End"); 17410447Snilay@cs.wisc.edu return; 17510447Snilay@cs.wisc.edu } 17610447Snilay@cs.wisc.edu 17710447Snilay@cs.wisc.edu StdCellLib* StdCellLib::clone() const 17810447Snilay@cs.wisc.edu { 17910447Snilay@cs.wisc.edu StdCellLib* new_lib = new StdCellLib(m_tech_model_); 18010447Snilay@cs.wisc.edu return new_lib; 18110447Snilay@cs.wisc.edu } 18210447Snilay@cs.wisc.edu 18310447Snilay@cs.wisc.edu const String StdCellLib::genDrivingStrengthString(const vector<double>& driving_strength_) const 18410447Snilay@cs.wisc.edu { 18510447Snilay@cs.wisc.edu String ret_str = "["; 18610447Snilay@cs.wisc.edu for(int i = 0; i < (int)driving_strength_.size() - 1; ++i) 18710447Snilay@cs.wisc.edu { 18810447Snilay@cs.wisc.edu ret_str += String(driving_strength_[i]) + ", "; 18910447Snilay@cs.wisc.edu } 19010447Snilay@cs.wisc.edu ret_str += String(driving_strength_[driving_strength_.size() - 1]); 19110447Snilay@cs.wisc.edu ret_str += "]"; 19210447Snilay@cs.wisc.edu return ret_str; 19310447Snilay@cs.wisc.edu } 19410447Snilay@cs.wisc.edu 19510447Snilay@cs.wisc.edu Map<double>* StdCellLib::getStdCellCache() const 19610447Snilay@cs.wisc.edu { 19710447Snilay@cs.wisc.edu return m_std_cell_cache_; 19810447Snilay@cs.wisc.edu } 19910447Snilay@cs.wisc.edu 20010447Snilay@cs.wisc.edu} // namespace DSENT 20110447Snilay@cs.wisc.edu 202