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[core] code format

This commit is contained in:
tangxifan 2023-04-24 13:36:59 +08:00
parent 715765d81b
commit 3c6a4d34d8
2 changed files with 132 additions and 79 deletions
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200
openfpga/src/fpga_verilog/verilog_top_testbench.cpp
View File

@ -45,12 +45,13 @@ static std::string generate_top_testbench_clock_name(
}
/********************************************************************
* In most cases we should have only one programming clock and hence a config done signals
* But there is one exception:
* When there are more than 1 programming clocks defined in CCFF chains, the port width of
* config done port should be the same as the programming clocks
* In most cases we should have only one programming clock and hence a config
*done signals But there is one exception: When there are more than 1
*programming clocks defined in CCFF chains, the port width of config done port
*should be the same as the programming clocks
*******************************************************************/
static size_t find_config_protocol_num_prog_clocks(const ConfigProtocol& config_protocol) {
static size_t find_config_protocol_num_prog_clocks(
const ConfigProtocol& config_protocol) {
size_t num_config_done_signals = 1;
if (config_protocol.type() == CONFIG_MEM_SCAN_CHAIN) {
num_config_done_signals = config_protocol.num_prog_clocks();
@ -283,8 +284,7 @@ static void print_verilog_top_testbench_config_protocol_port(
*******************************************************************/
static void print_verilog_top_testbench_global_clock_ports_stimuli(
std::fstream& fp, const ModuleManager& module_manager,
const ModuleId& top_module,
const ConfigProtocol& config_protocol,
const ModuleId& top_module, const ConfigProtocol& config_protocol,
const FabricGlobalPortInfo& fabric_global_port_info,
const SimulationSetting& simulation_parameters) {
/* Validate the file stream */
@ -319,7 +319,8 @@ static void print_verilog_top_testbench_global_clock_ports_stimuli(
if (true ==
fabric_global_port_info.global_port_is_prog(fabric_global_port)) {
stimuli_clock_port.set_name(std::string(TOP_TB_PROG_CLOCK_PORT_NAME));
size_t num_prog_clocks = find_config_protocol_num_prog_clocks(config_protocol);
size_t num_prog_clocks =
find_config_protocol_num_prog_clocks(config_protocol);
stimuli_clock_port.set_width(num_prog_clocks);
} else {
VTR_ASSERT_SAFE(false == fabric_global_port_info.global_port_is_prog(
@ -353,8 +354,10 @@ static void print_verilog_top_testbench_global_clock_ports_stimuli(
* prog_clock[1] <= __prog_clock__[1]
*/
BasicPort stimuli_clock_pin(stimuli_clock_port);
if (stimuli_clock_port.get_name() == std::string(TOP_TB_PROG_CLOCK_PORT_NAME)) {
stimuli_clock_pin.set_width(stimuli_clock_pin.pins()[pin], stimuli_clock_pin.pins()[pin]);
if (stimuli_clock_port.get_name() ==
std::string(TOP_TB_PROG_CLOCK_PORT_NAME)) {
stimuli_clock_pin.set_width(stimuli_clock_pin.pins()[pin],
stimuli_clock_pin.pins()[pin]);
}
print_verilog_wire_connection(
@ -863,18 +866,23 @@ static void print_verilog_top_testbench_ports(
* and then wire them to the ports of FPGA fabric depending on their usage
*/
/* Configuration done port */
size_t num_config_done_signals = find_config_protocol_num_prog_clocks(config_protocol);
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME), num_config_done_signals);
size_t num_config_done_signals =
find_config_protocol_num_prog_clocks(config_protocol);
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME),
num_config_done_signals);
fp << generate_verilog_port(VERILOG_PORT_REG, config_done_port) << ";"
<< std::endl;
/* Configuration all done port: pull up when all the config done ports are pulled up */
BasicPort config_all_done_port(std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME), 1);
/* Configuration all done port: pull up when all the config done ports are
* pulled up */
BasicPort config_all_done_port(std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME),
1);
fp << generate_verilog_port(VERILOG_PORT_REG, config_all_done_port) << ";"
<< std::endl;
/* Programming clock: same rule applied as the configuration done ports */
BasicPort prog_clock_port(std::string(TOP_TB_PROG_CLOCK_PORT_NAME), num_config_done_signals);
BasicPort prog_clock_port(std::string(TOP_TB_PROG_CLOCK_PORT_NAME),
num_config_done_signals);
fp << generate_verilog_port(VERILOG_PORT_WIRE, prog_clock_port) << ";"
<< std::endl;
BasicPort prog_clock_register_port(
@ -977,15 +985,18 @@ static size_t calculate_num_config_clock_cycles(
size_t regional_bitstream_max_size =
find_fabric_regional_bitstream_max_size(fabric_bitstream);
/* For configuration chain that require multiple programming clocks. Need a different calculation */
/* For configuration chain that require multiple programming clocks. Need a
* different calculation */
if (config_protocol.type() == CONFIG_MEM_SCAN_CHAIN) {
if (config_protocol.num_prog_clocks() > 1) {
regional_bitstream_max_size = 0;
for (BasicPort prog_clk_pin : config_protocol.prog_clock_pins()) {
std::vector<size_t> ccff_head_indices = config_protocol.prog_clock_pin_ccff_head_indices(prog_clk_pin);
regional_bitstream_max_size += find_fabric_regional_bitstream_max_size(fabric_bitstream, ccff_head_indices);
}
}
std::vector<size_t> ccff_head_indices =
config_protocol.prog_clock_pin_ccff_head_indices(prog_clk_pin);
regional_bitstream_max_size += find_fabric_regional_bitstream_max_size(
fabric_bitstream, ccff_head_indices);
}
}
}
size_t num_config_clock_cycles = 1 + regional_bitstream_max_size;
@ -1017,9 +1028,12 @@ static size_t calculate_num_config_clock_cycles(
if (config_protocol.num_prog_clocks() > 1) {
num_bits_to_skip = 0;
for (BasicPort prog_clk_pin : config_protocol.prog_clock_pins()) {
std::vector<size_t> ccff_head_indices = config_protocol.prog_clock_pin_ccff_head_indices(prog_clk_pin);
num_bits_to_skip += find_configuration_chain_fabric_bitstream_size_to_be_skipped(
fabric_bitstream, bitstream_manager, bit_value_to_skip, ccff_head_indices);
std::vector<size_t> ccff_head_indices =
config_protocol.prog_clock_pin_ccff_head_indices(prog_clk_pin);
num_bits_to_skip +=
find_configuration_chain_fabric_bitstream_size_to_be_skipped(
fabric_bitstream, bitstream_manager, bit_value_to_skip,
ccff_head_indices);
}
}
@ -1161,7 +1175,8 @@ static void print_verilog_top_testbench_benchmark_instance(
* 7. set signal
*******************************************************************/
static void print_verilog_top_testbench_generic_stimulus(
std::fstream& fp, const ConfigProtocol& config_protocol, const SimulationSetting& simulation_parameters,
std::fstream& fp, const ConfigProtocol& config_protocol,
const SimulationSetting& simulation_parameters,
const size_t& num_config_clock_cycles, const float& prog_clock_period,
const float& op_clock_period, const float& timescale) {
/* Validate the file stream */
@ -1171,9 +1186,12 @@ static void print_verilog_top_testbench_generic_stimulus(
fp, std::string("----- Number of clock cycles in configuration phase: " +
std::to_string(num_config_clock_cycles) + " -----"));
size_t num_config_done_signals = find_config_protocol_num_prog_clocks(config_protocol);
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME), num_config_done_signals);
BasicPort config_all_done_port(std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME), 1);
size_t num_config_done_signals =
find_config_protocol_num_prog_clocks(config_protocol);
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME),
num_config_done_signals);
BasicPort config_all_done_port(std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME),
1);
BasicPort op_clock_port(std::string(TOP_TB_OP_CLOCK_PORT_NAME), 1);
BasicPort op_clock_register_port(
@ -1181,7 +1199,8 @@ static void print_verilog_top_testbench_generic_stimulus(
std::string(TOP_TB_CLOCK_REG_POSTFIX)),
1);
BasicPort prog_clock_port(std::string(TOP_TB_PROG_CLOCK_PORT_NAME), num_config_done_signals);
BasicPort prog_clock_port(std::string(TOP_TB_PROG_CLOCK_PORT_NAME),
num_config_done_signals);
BasicPort prog_clock_register_port(
std::string(std::string(TOP_TB_PROG_CLOCK_PORT_NAME) +
std::string(TOP_TB_CLOCK_REG_POSTFIX)),
@ -1223,14 +1242,20 @@ static void print_verilog_top_testbench_generic_stimulus(
prog_reset_port.get_name() + " are disabled -----"));
VTR_ASSERT(prog_clock_port.get_width() == config_done_port.get_width());
for (size_t pin : prog_clock_port.pins()) {
BasicPort curr_clk_pin(prog_clock_port.get_name(), prog_clock_port.pins()[pin], prog_clock_port.pins()[pin]);
BasicPort curr_cfg_pin(config_done_port.get_name(), config_done_port.pins()[pin], config_done_port.pins()[pin]);
BasicPort curr_clk_pin(prog_clock_port.get_name(),
prog_clock_port.pins()[pin],
prog_clock_port.pins()[pin]);
BasicPort curr_cfg_pin(config_done_port.get_name(),
config_done_port.pins()[pin],
config_done_port.pins()[pin]);
fp << "\tassign "
<< generate_verilog_port(VERILOG_PORT_CONKT, curr_clk_pin);
fp << " = "
<< generate_verilog_port(VERILOG_PORT_CONKT, prog_clock_register_port);
if (pin > 0) {
BasicPort prev_cfg_pin(config_done_port.get_name(), config_done_port.pins()[pin - 1], config_done_port.pins()[pin - 1]);
BasicPort prev_cfg_pin(config_done_port.get_name(),
config_done_port.pins()[pin - 1],
config_done_port.pins()[pin - 1]);
fp << " & (" << generate_verilog_port(VERILOG_PORT_CONKT, prev_cfg_pin)
<< ")";
}
@ -1243,12 +1268,15 @@ static void print_verilog_top_testbench_generic_stimulus(
fp << std::endl;
/* Config all done signal is triggered when all the config done signals are pulled up */
/* Config all done signal is triggered when all the config done signals are
* pulled up */
fp << "\tassign "
<< generate_verilog_port(VERILOG_PORT_CONKT, config_all_done_port)
<< " = ";
for (size_t pin : config_done_port.pins()) {
BasicPort curr_cfg_pin(config_done_port.get_name(), config_done_port.pins()[pin], config_done_port.pins()[pin]);
BasicPort curr_cfg_pin(config_done_port.get_name(),
config_done_port.pins()[pin],
config_done_port.pins()[pin]);
if (pin > 1) {
fp << " & ";
}
@ -1291,7 +1319,8 @@ static void print_verilog_top_testbench_generic_stimulus(
<< generate_verilog_port(VERILOG_PORT_CONKT, sim_clock_port);
fp << " = "
<< generate_verilog_port(VERILOG_PORT_CONKT, sim_clock_register_port);
fp << " & " << generate_verilog_port(VERILOG_PORT_CONKT, config_all_done_port);
fp << " & "
<< generate_verilog_port(VERILOG_PORT_CONKT, config_all_done_port);
fp << ";" << std::endl;
fp << std::endl;
@ -1316,7 +1345,8 @@ static void print_verilog_top_testbench_generic_stimulus(
fp << "\tassign " << generate_verilog_port(VERILOG_PORT_CONKT, op_clock_port);
fp << " = "
<< generate_verilog_port(VERILOG_PORT_CONKT, op_clock_register_port);
fp << " & " << generate_verilog_port(VERILOG_PORT_CONKT, config_all_done_port);
fp << " & "
<< generate_verilog_port(VERILOG_PORT_CONKT, config_all_done_port);
fp << ";" << std::endl;
fp << std::endl;
@ -1359,7 +1389,8 @@ static void print_verilog_top_testbench_generic_stimulus(
"----- Reset signal is enabled until the first clock "
"cycle in operation phase -----");
print_verilog_pulse_stimuli(fp, reset_port, 1, reset_pulse_widths,
reset_flip_values, config_all_done_port.get_name());
reset_flip_values,
config_all_done_port.get_name());
print_verilog_comment(fp,
"----- End operating reset signal generation -----");
@ -1576,7 +1607,8 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
}
VTR_ASSERT(num_bits_to_skip < regional_bitstream_max_size);
size_t num_prog_clocks = find_config_protocol_num_prog_clocks(config_protocol);
size_t num_prog_clocks =
find_config_protocol_num_prog_clocks(config_protocol);
/* Define a constant for the bitstream length */
print_verilog_define_flag(fp, std::string(TOP_TB_BITSTREAM_LENGTH_VARIABLE),
@ -1587,15 +1619,21 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
/* Additional constants for multiple programming clock */
if (num_prog_clocks > 1) {
for (size_t iclk = 0; iclk < num_prog_clocks; ++iclk) {
std::vector<size_t> ccff_head_indices = config_protocol.prog_clock_pin_ccff_head_indices(config_protocol.prog_clock_pins()[iclk]);
std::vector<size_t> ccff_head_indices =
config_protocol.prog_clock_pin_ccff_head_indices(
config_protocol.prog_clock_pins()[iclk]);
size_t curr_regional_bitstream_max_size =
find_fabric_regional_bitstream_max_size(fabric_bitstream, ccff_head_indices);
find_fabric_regional_bitstream_max_size(fabric_bitstream,
ccff_head_indices);
size_t curr_num_bits_to_skip =
find_configuration_chain_fabric_bitstream_size_to_be_skipped(
fabric_bitstream, bitstream_manager, bit_value_to_skip, ccff_head_indices);
fabric_bitstream, bitstream_manager, bit_value_to_skip,
ccff_head_indices);
print_verilog_define_flag(fp, std::string(TOP_TB_BITSTREAM_LENGTH_VARIABLE) + std::to_string(iclk),
curr_regional_bitstream_max_size - curr_num_bits_to_skip);
print_verilog_define_flag(
fp,
std::string(TOP_TB_BITSTREAM_LENGTH_VARIABLE) + std::to_string(iclk),
curr_regional_bitstream_max_size - curr_num_bits_to_skip);
}
}
@ -1625,8 +1663,9 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
} else {
VTR_ASSERT(num_prog_clocks > 1);
for (size_t iclk = 0; iclk < num_prog_clocks; ++iclk) {
fp << "reg [$clog2(`" << TOP_TB_BITSTREAM_LENGTH_VARIABLE << iclk << "):0] "
<< TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk << ";" << std::endl;
fp << "reg [$clog2(`" << TOP_TB_BITSTREAM_LENGTH_VARIABLE << iclk
<< "):0] " << TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk << ";"
<< std::endl;
}
}
@ -1736,8 +1775,10 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
<< TOP_TB_BITSTREAM_ITERATOR_REG_NAME << " + 1)";
fp << " begin";
fp << std::endl;
std::vector<size_t> ccff_head_indices = config_protocol.prog_clock_pin_ccff_head_indices(config_protocol.prog_clock_pins()[iclk]);
std::vector<size_t> ccff_head_indices =
config_protocol.prog_clock_pin_ccff_head_indices(
config_protocol.prog_clock_pins()[iclk]);
fp << "\t\t";
fp << "if (";
bool first_pin = false;
@ -1749,14 +1790,13 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
std::vector<size_t>(1, bit_value_to_skip));
fp << " == ";
fp << TOP_TB_BITSTREAM_MEM_REG_NAME << "["
<< TOP_TB_BITSTREAM_ITERATOR_REG_NAME << "]["
<< ccff_head_idx
<< TOP_TB_BITSTREAM_ITERATOR_REG_NAME << "][" << ccff_head_idx
<< "]";
}
fp << ")";
fp << " begin";
fp << std::endl;
BasicPort curr_bit_skip_reg(bit_skip_reg);
curr_bit_skip_reg.set_width(iclk, iclk);
fp << "\t\t\t";
@ -1767,34 +1807,35 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
fp << generate_verilog_port(VERILOG_PORT_CONKT, curr_bit_skip_reg) << ")";
fp << " begin";
fp << std::endl;
fp << "\t\t\t\t";
fp << TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk;
fp << " <= ";
fp << TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk << " + 1";
fp << ";" << std::endl;
fp << "\t\t\t";
fp << "end";
fp << std::endl;
fp << "\t\t";
fp << "end else begin";
fp << std::endl;
fp << "\t\t\t";
fp << generate_verilog_port_constant_values(
curr_bit_skip_reg, std::vector<size_t>(curr_bit_skip_reg.get_width(), 0), true);
curr_bit_skip_reg,
std::vector<size_t>(curr_bit_skip_reg.get_width(), 0), true);
fp << ";" << std::endl;
fp << "\t\t";
fp << "end";
fp << std::endl;
fp << "\t";
fp << "end";
fp << std::endl;
fp << "end";
fp << std::endl;
}
@ -1824,7 +1865,8 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME), 1);
fp << "\t\t";
std::vector<size_t> config_done_final_values(config_done_port.get_width(), 1);
std::vector<size_t> config_done_final_values(config_done_port.get_width(),
1);
fp << generate_verilog_port_constant_values(config_done_port,
config_done_final_values, true);
fp << ";" << std::endl;
@ -1842,8 +1884,8 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
fp << "\t\t";
fp << generate_verilog_port(VERILOG_PORT_CONKT, config_chain_head_port);
fp << " <= ";
fp << TOP_TB_BITSTREAM_MEM_REG_NAME << "[" << TOP_TB_BITSTREAM_INDEX_REG_NAME
<< "]";
fp << TOP_TB_BITSTREAM_MEM_REG_NAME << "["
<< TOP_TB_BITSTREAM_INDEX_REG_NAME << "]";
fp << ";" << std::endl;
fp << "\t\t";
@ -1875,19 +1917,23 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
fp << ") begin";
fp << std::endl;
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME), iclk, iclk);
BasicPort config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME),
iclk, iclk);
fp << "\t\t";
std::vector<size_t> config_done_final_values(config_done_port.get_width(), 1);
fp << generate_verilog_port_constant_values(config_done_port,
config_done_final_values, true);
std::vector<size_t> config_done_final_values(config_done_port.get_width(),
1);
fp << generate_verilog_port_constant_values(
config_done_port, config_done_final_values, true);
fp << ";" << std::endl;
fp << "\t";
fp << "end else if (";
/* Wait for previous configuration chain finished */
if (iclk > 0) {
BasicPort prev_config_done_port(std::string(TOP_TB_CONFIG_DONE_PORT_NAME), iclk - 1, iclk - 1);
std::vector<size_t> prev_config_done_final_values(prev_config_done_port.get_width(), 1);
BasicPort prev_config_done_port(
std::string(TOP_TB_CONFIG_DONE_PORT_NAME), iclk - 1, iclk - 1);
std::vector<size_t> prev_config_done_final_values(
prev_config_done_port.get_width(), 1);
fp << generate_verilog_port(VERILOG_PORT_CONKT, prev_config_done_port);
fp << " == ";
fp << generate_verilog_constant_values(prev_config_done_final_values);
@ -1904,8 +1950,8 @@ static void print_verilog_full_testbench_configuration_chain_bitstream(
fp << "\t\t";
fp << generate_verilog_port(VERILOG_PORT_CONKT, config_chain_head_port);
fp << " <= ";
fp << TOP_TB_BITSTREAM_MEM_REG_NAME << "[" << TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk
<< "]";
fp << TOP_TB_BITSTREAM_MEM_REG_NAME << "["
<< TOP_TB_BITSTREAM_INDEX_REG_NAME << iclk << "]";
fp << ";" << std::endl;
fp << "\t\t";
@ -2254,7 +2300,8 @@ static void print_verilog_full_testbench_bitstream(
case CONFIG_MEM_SCAN_CHAIN:
print_verilog_full_testbench_configuration_chain_bitstream(
fp, bitstream_file, fast_configuration, bit_value_to_skip,
module_manager, top_module, bitstream_manager, fabric_bitstream, config_protocol);
module_manager, top_module, bitstream_manager, fabric_bitstream,
config_protocol);
break;
case CONFIG_MEM_MEMORY_BANK:
print_verilog_full_testbench_memory_bank_bitstream(
@ -2478,8 +2525,8 @@ int print_verilog_full_testbench(
/* Generate stimuli for general control signals */
print_verilog_top_testbench_generic_stimulus(
fp, config_protocol, simulation_parameters, num_config_clock_cycles, prog_clock_period,
default_op_clock_period, VERILOG_SIM_TIMESCALE);
fp, config_protocol, simulation_parameters, num_config_clock_cycles,
prog_clock_period, default_op_clock_period, VERILOG_SIM_TIMESCALE);
/* Generate stimuli for programming interface */
int status = CMD_EXEC_SUCCESS;
@ -2519,8 +2566,9 @@ int print_verilog_full_testbench(
/* Generate stimuli for global ports or connect them to existed signals */
print_verilog_top_testbench_global_ports_stimuli(
fp, module_manager, top_module, pin_constraints, config_protocol, global_ports,
simulation_parameters, active_global_prog_reset, active_global_prog_set);
fp, module_manager, top_module, pin_constraints, config_protocol,
global_ports, simulation_parameters, active_global_prog_reset,
active_global_prog_set);
/* Instanciate FPGA top-level module */
print_verilog_testbench_fpga_instance(
@ -2585,9 +2633,9 @@ int print_verilog_full_testbench(
clock_port_names, std::string(TOP_TB_OP_CLOCK_PORT_NAME));
/* Add autocheck for configuration phase */
print_verilog_top_testbench_check(fp,
std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME),
std::string(TOP_TESTBENCH_ERROR_COUNTER));
print_verilog_top_testbench_check(
fp, std::string(TOP_TB_CONFIG_ALL_DONE_PORT_NAME),
std::string(TOP_TESTBENCH_ERROR_COUNTER));
}
/* Find simulation time */

11
openfpga/src/utils/fabric_bitstream_utils.cpp
View File

@ -22,7 +22,8 @@ namespace openfpga {
/********************************************************************
* Find the longest bitstream size of a fabric bitstream
* Only care the region in whitelist. If the whitelist is empty, consider all the regions
* Only care the region in whitelist. If the whitelist is empty, consider all
*the regions
*******************************************************************/
size_t find_fabric_regional_bitstream_max_size(
const FabricBitstream& fabric_bitstream,
@ -30,7 +31,9 @@ size_t find_fabric_regional_bitstream_max_size(
size_t regional_bitstream_max_size = 0;
/* Find the longest regional bitstream */
for (const auto& region : fabric_bitstream.regions()) {
if (!region_whitelist.empty() && (std::find(region_whitelist.begin(), region_whitelist.end(), size_t(region)) != region_whitelist.end())) {
if (!region_whitelist.empty() &&
(std::find(region_whitelist.begin(), region_whitelist.end(),
size_t(region)) != region_whitelist.end())) {
continue;
}
if (regional_bitstream_max_size <
@ -60,7 +63,9 @@ size_t find_configuration_chain_fabric_bitstream_size_to_be_skipped(
size_t num_bits_to_skip = size_t(-1);
for (const auto& region : fabric_bitstream.regions()) {
if (!region_whitelist.empty() && (std::find(region_whitelist.begin(), region_whitelist.end(), size_t(region)) != region_whitelist.end())) {
if (!region_whitelist.empty() &&
(std::find(region_whitelist.begin(), region_whitelist.end(),
size_t(region)) != region_whitelist.end())) {
continue;
}
size_t curr_region_num_bits_to_skip = 0;