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start refactoring the num_config_bits for circuit model

This commit is contained in:
tangxifan 2019-09-26 22:53:07 -06:00
parent 8ccf681749
commit 091bbd4d9c
3 changed files with 105 additions and 17 deletions
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105
vpr7_x2p/vpr/SRC/device/mux_utils.cpp
View File

@ -271,18 +271,111 @@ size_t find_mux_num_reserved_config_bits(const CircuitLibrary& circuit_lib,
}
/**************************************************
* Find the number of configuration bits for a multiplexer
* Find the number of configuration bits for a CMOS multiplexer
* In general, the number of configuration bits is
* the number of memory bits for a mux_graph
* However, when local decoders are used, this should be changed!
* However, when local decoders are used,
* the number of configuration bits are reduced to log2(X)
*************************************************/
size_t find_mux_num_config_bits(const CircuitLibrary& circuit_lib,
const CircuitModelId& mux_model,
const MuxGraph& mux_graph) {
static
size_t find_cmos_mux_num_config_bits(const CircuitLibrary& circuit_lib,
const CircuitModelId& mux_model,
const MuxGraph& mux_graph,
const e_sram_orgz& sram_orgz_type) {
size_t num_config_bits = 0;
switch (sram_orgz_type) {
case SPICE_SRAM_MEMORY_BANK:
case SPICE_SRAM_SCAN_CHAIN:
case SPICE_SRAM_STANDALONE:
num_config_bits = mux_graph.num_memory_bits();
break;
default:
vpr_printf(TIO_MESSAGE_ERROR,
"(FILE:%s,LINE[%d])Invalid type of SRAM organization!\n",
__FILE__, __LINE__);
exit(1);
}
if (true == circuit_lib.mux_use_local_encoder(mux_model)) {
num_config_bits = find_mux_local_decoder_addr_size(mux_graph.num_memory_bits());
}
return num_config_bits;
}
/**************************************************
* Find the number of configuration bits for a RRAM multiplexer
* In general, the number of configuration bits is
* the number of levels for a mux_graph
* This is due to only the last BL/WL of the multiplexer is
* independent from each other
* However, when local decoders are used,
* the number of configuration bits should be consider all the
* shared(reserved) configuration bits and independent bits
*************************************************/
static
size_t find_rram_mux_num_config_bits(const CircuitLibrary& circuit_lib,
const CircuitModelId& mux_model,
const MuxGraph& mux_graph,
const e_sram_orgz& sram_orgz_type) {
size_t num_config_bits = 0;
switch (sram_orgz_type) {
case SPICE_SRAM_MEMORY_BANK:
/* In memory bank, by intensively share the Bit/Word Lines,
* we only need 1 additional BL and WL for each MUX level.
*/
num_config_bits = mux_graph.num_levels();
break;
case SPICE_SRAM_SCAN_CHAIN:
case SPICE_SRAM_STANDALONE:
/* Currently we DO NOT SUPPORT THESE, given an invalid number */
num_config_bits = size_t(-1);
break;
default:
vpr_printf(TIO_MESSAGE_ERROR,
"(FILE:%s,LINE[%d])Invalid type of SRAM organization!\n",
__FILE__, __LINE__);
exit(1);
}
if (true == circuit_lib.mux_use_local_encoder(mux_model)) {
/* TODO: this is a to-do work for ReRAM-based multiplexers and FPGAs
* The number of states of a local decoder only depends on how many
* memory bits that the multiplexer will have
* This may NOT be correct!!!
*/
return find_mux_local_decoder_addr_size(mux_graph.num_memory_bits());
}
return mux_graph.num_memory_bits();
return num_config_bits;
}
/**************************************************
* Find the number of configuration bits for
* a routing multiplexer
* Two cases are considered here.
* They are placed in different branches (sub-functions)
* in order to be easy in extending to new technology!
*************************************************/
size_t find_mux_num_config_bits(const CircuitLibrary& circuit_lib,
const CircuitModelId& mux_model,
const MuxGraph& mux_graph,
const e_sram_orgz& sram_orgz_type) {
size_t num_config_bits = size_t(-1);
switch (circuit_lib.design_tech_type(mux_model)) {
case SPICE_MODEL_DESIGN_CMOS:
num_config_bits = find_rram_mux_num_config_bits(circuit_lib, mux_model, mux_graph, sram_orgz_type);
break;
case SPICE_MODEL_DESIGN_RRAM:
num_config_bits = find_rram_mux_num_config_bits(circuit_lib, mux_model, mux_graph, sram_orgz_type);
break;
default:
vpr_printf(TIO_MESSAGE_ERROR,
"(FILE:%s,LINE[%d])Invalid design_technology of MUX(name: %s)\n",
__FILE__, __LINE__, circuit_lib.model_name(mux_model).c_str());
exit(1);
}
return num_config_bits;
}

3
vpr7_x2p/vpr/SRC/device/mux_utils.h
View File

@ -43,6 +43,7 @@ size_t find_mux_num_reserved_config_bits(const CircuitLibrary& circuit_lib,
size_t find_mux_num_config_bits(const CircuitLibrary& circuit_lib,
const CircuitModelId& mux_model,
const MuxGraph& mux_graph);
const MuxGraph& mux_graph,
const e_sram_orgz& sram_orgz_type);
#endif

14
vpr7_x2p/vpr/SRC/fpga_x2p/verilog/verilog_routing.c
View File

@ -2378,17 +2378,11 @@ void print_verilog_unique_switch_box_mux(ModuleManager& module_manager,
/* Connect input ports to bus */
fp << generate_verilog_local_wire(inbus_port, mux_input_ports);
/* TODO: Find the number of reserved configuration bits for the routing multiplexer
num_mux_reserved_conf_bits = count_num_reserved_conf_bits_one_spice_model(verilog_model,
cur_sram_orgz_info->type,
mux_size);
*/
/* Find the number of reserved configuration bits for the routing multiplexer */
size_t mux_num_reserved_config_bits = find_mux_num_reserved_config_bits(circuit_lib, mux_model, mux_graph);
/* TODO: Find the number of configuration bits for the routing multiplexer
num_mux_conf_bits = count_num_conf_bits_one_spice_model(verilog_model,
cur_sram_orgz_info->type,
mux_size);
*/
/* Find the number of configuration bits for the routing multiplexer */
size_t mux_num_config_bits = find_mux_num_config_bits(circuit_lib, mux_model, mux_graph, cur_sram_orgz_info->type);
/* Print the configuration port bus */
/* TODO: Print the configuration bus for the routing multiplexers