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[Tool] Patch FPGA-SDC to consider time unit in global port timing constraints

This commit is contained in:
tangxifan 2021-05-27 10:26:20 -06:00
parent 16ae23f33e
commit 1fd399736d
3 changed files with 13 additions and 4 deletions
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15
openfpga/src/fpga_sdc/pnr_sdc_global_port.cpp
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@ -20,6 +20,7 @@
/* Headers from openfpgautil library */ /* Headers from openfpgautil library */
#include "openfpga_port.h" #include "openfpga_port.h"
#include "openfpga_digest.h" #include "openfpga_digest.h"
#include "openfpga_scale.h"
#include "sdc_writer_naming.h" #include "sdc_writer_naming.h"
#include "sdc_writer_utils.h" #include "sdc_writer_utils.h"
@ -59,6 +60,7 @@ void print_pnr_sdc_clock_port(std::fstream& fp,
*******************************************************************/ *******************************************************************/
static static
void print_pnr_sdc_global_clock_ports(std::fstream& fp, void print_pnr_sdc_global_clock_ports(std::fstream& fp,
const float& time_unit,
const ModuleManager& module_manager, const ModuleManager& module_manager,
const ModuleId& top_module, const ModuleId& top_module,
const FabricGlobalPortInfo& fabric_global_port_info, const FabricGlobalPortInfo& fabric_global_port_info,
@ -103,7 +105,7 @@ void print_pnr_sdc_global_clock_ports(std::fstream& fp,
print_pnr_sdc_clock_port(fp, print_pnr_sdc_clock_port(fp,
port_to_constrain, port_to_constrain,
clock_period); clock_period / time_unit);
} }
} }
} }
@ -118,6 +120,7 @@ void print_pnr_sdc_global_clock_ports(std::fstream& fp,
*******************************************************************/ *******************************************************************/
static static
void print_pnr_sdc_global_non_clock_ports(std::fstream& fp, void print_pnr_sdc_global_non_clock_ports(std::fstream& fp,
const float& time_unit,
const float& operating_critical_path_delay, const float& operating_critical_path_delay,
const ModuleManager& module_manager, const ModuleManager& module_manager,
const ModuleId& top_module, const ModuleId& top_module,
@ -144,7 +147,7 @@ void print_pnr_sdc_global_non_clock_ports(std::fstream& fp,
print_pnr_sdc_clock_port(fp, print_pnr_sdc_clock_port(fp,
port_to_constrain, port_to_constrain,
clock_period); clock_period / time_unit);
} }
} }
} }
@ -161,6 +164,7 @@ void print_pnr_sdc_global_non_clock_ports(std::fstream& fp,
* In general, we do not recommend to do this * In general, we do not recommend to do this
*******************************************************************/ *******************************************************************/
void print_pnr_sdc_global_ports(const std::string& sdc_dir, void print_pnr_sdc_global_ports(const std::string& sdc_dir,
const float& time_unit,
const ModuleManager& module_manager, const ModuleManager& module_manager,
const ModuleId& top_module, const ModuleId& top_module,
const FabricGlobalPortInfo& global_ports, const FabricGlobalPortInfo& global_ports,
@ -183,12 +187,15 @@ void print_pnr_sdc_global_ports(const std::string& sdc_dir,
/* Generate the descriptions*/ /* Generate the descriptions*/
print_sdc_file_header(fp, std::string("Clock contraints for PnR")); print_sdc_file_header(fp, std::string("Clock contraints for PnR"));
print_pnr_sdc_global_clock_ports(fp, /* Print time unit for the SDC file */
print_sdc_timescale(fp, time_unit_to_string(time_unit));
print_pnr_sdc_global_clock_ports(fp, time_unit,
module_manager, top_module, module_manager, top_module,
global_ports, sim_setting); global_ports, sim_setting);
if (true == constrain_non_clock_port) { if (true == constrain_non_clock_port) {
print_pnr_sdc_global_non_clock_ports(fp, print_pnr_sdc_global_non_clock_ports(fp, time_unit,
1./sim_setting.default_operating_clock_frequency(), 1./sim_setting.default_operating_clock_frequency(),
module_manager, top_module, module_manager, top_module,
global_ports); global_ports);

1
openfpga/src/fpga_sdc/pnr_sdc_global_port.h
View File

@ -18,6 +18,7 @@
namespace openfpga { namespace openfpga {
void print_pnr_sdc_global_ports(const std::string& sdc_dir, void print_pnr_sdc_global_ports(const std::string& sdc_dir,
const float& time_unit,
const ModuleManager& module_manager, const ModuleManager& module_manager,
const ModuleId& top_module, const ModuleId& top_module,
const FabricGlobalPortInfo& global_ports, const FabricGlobalPortInfo& global_ports,

1
openfpga/src/fpga_sdc/pnr_sdc_writer.cpp
View File

@ -336,6 +336,7 @@ void print_pnr_sdc(const PnrSdcOption& sdc_options,
/* Constrain global ports */ /* Constrain global ports */
if (true == sdc_options.constrain_global_port()) { if (true == sdc_options.constrain_global_port()) {
print_pnr_sdc_global_ports(sdc_options.sdc_dir(), print_pnr_sdc_global_ports(sdc_options.sdc_dir(),
sdc_options.time_unit(),
module_manager, top_module, global_ports, module_manager, top_module, global_ports,
sim_setting, sim_setting,
sdc_options.constrain_non_clock_global_port()); sdc_options.constrain_non_clock_global_port());