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OpenFPGA
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update the SDC of VPR7+OpenFPGA to be even with VPR8+OpenFPGA

This commit is contained in:
tangxifan 2020-03-25 14:44:42 -06:00
parent c2e5d6b8e2
commit 62b6de8437
1 changed files with 31 additions and 28 deletions
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59
vpr7_x2p/vpr/SRC/fpga_x2p/backend_assistant/pnr_sdc_writer.cpp
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@ -45,7 +45,8 @@ static
void print_pnr_sdc_global_ports(const std::string& sdc_dir,
const float& critical_path_delay,
const CircuitLibrary& circuit_lib,
const std::vector<CircuitPortId>& global_ports) {
const std::vector<CircuitPortId>& global_ports,
const bool& constrain_non_clock_ports) {
/* Create the file name for Verilog netlist */
std::string sdc_fname(sdc_dir + std::string(SDC_GLOBAL_PORTS_FILE_NAME));
@ -91,43 +92,45 @@ void print_pnr_sdc_global_ports(const std::string& sdc_dir,
for (const size_t& pin : circuit_lib.pins(clock_port)) {
BasicPort port_to_constrain(circuit_lib.port_prefix(clock_port), pin, pin);
fp << "create_clock ";
fp << generate_sdc_port(port_to_constrain) << "-period ";
fp << "create_clock -name ";
fp << generate_sdc_port(port_to_constrain) << " -period ";
fp << std::setprecision(10) << clock_period;
fp << " -waveform {0 ";
fp << std::setprecision(10) << clock_period / 2;
fp << "}" << std::endl;
fp << "}";
fp << "{get_ports {" << generate_sdc_port(port_to_constrain) << "}]";
fp << std::endl;
fp << std::endl;
}
}
/* For non-clock port from the global port: give a fixed period */
for (const CircuitPortId& global_port : global_ports) {
if (SPICE_MODEL_PORT_CLOCK == circuit_lib.port_type(global_port)) {
continue;
}
if (true == constrain_non_clock_ports) {
/* For non-clock port from the global port: give a fixed period */
for (const CircuitPortId& global_port : global_ports) {
if (SPICE_MODEL_PORT_CLOCK == circuit_lib.port_type(global_port)) {
continue;
}
/* Print comments */
fp << "##################################################" << std::endl;
fp << "# Constrain other global ports " << std::endl;
fp << "##################################################" << std::endl;
/* Print comments */
fp << "##################################################" << std::endl;
fp << "# Constrain other global ports " << std::endl;
fp << "##################################################" << std::endl;
/* Reach here, it means a non-clock global port and we need print constraints */
float clock_period = SDC_FIXED_CLOCK_PERIOD;
for (const size_t& pin : circuit_lib.pins(global_port)) {
BasicPort port_to_constrain(circuit_lib.port_prefix(global_port), pin, pin);
fp << "create_clock ";
fp << generate_sdc_port(port_to_constrain) << "-period ";
fp << std::setprecision(10) << clock_period;
fp << " -waveform {0 ";
fp << std::setprecision(10) << clock_period / 2;
fp << "} ";
fp << "[list [get_ports { " << generate_sdc_port(port_to_constrain) << "}]]" << std::endl;
/* Reach here, it means a non-clock global port and we need print constraints */
float clock_period = SDC_FIXED_CLOCK_PERIOD;
for (const size_t& pin : circuit_lib.pins(global_port)) {
BasicPort port_to_constrain(circuit_lib.port_prefix(global_port), pin, pin);
fp << "create_clock -name ";
fp << generate_sdc_port(port_to_constrain) << " -period ";
fp << std::setprecision(10) << clock_period;
fp << " -waveform {0 ";
fp << std::setprecision(10) << clock_period / 2;
fp << "} ";
fp << "[get_ports { " << generate_sdc_port(port_to_constrain) << "}]" << std::endl;
fp << "set_drive 0 " << generate_sdc_port(port_to_constrain) << std::endl;
fp << std::endl;
fp << std::endl;
}
}
}
@ -397,7 +400,7 @@ void print_pnr_sdc(const SdcOption& sdc_options,
/* Constrain global ports */
if (true == sdc_options.constrain_global_port()) {
print_pnr_sdc_global_ports(sdc_options.sdc_dir(), critical_path_delay, circuit_lib, global_ports);
print_pnr_sdc_global_ports(sdc_options.sdc_dir(), critical_path_delay, circuit_lib, global_ports, false);
}
std::string top_module_name = generate_fpga_top_module_name();