ZYM/RISC-V-Simulator
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finish rough design, ready to write work() function

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This commit is contained in:
ZhuangYumin
2024-07-31 02:32:02 +00:00
parent e0d6a82066
commit 45288e1c36
6 changed files with 202 additions and 34 deletions
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75
include/registerfile.h
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@ -1,7 +1,10 @@
#pragma once
#include "concept.h"
#ifndef REGISTERFILE_H
#include <array>
#include "tools.h"
namespace ZYM {
const static size_t kTotalRegisters = 32;
struct RegisterFile_Input {
// receive control signal from CSU
dark::Wire<1> reset;
@ -9,7 +12,7 @@ struct RegisterFile_Input {
dark::Wire<1> is_issuing;
dark::Wire<1> issue_type;
dark::Wire<5> issue_ROB_index;
dark::Wire<7+3+1> full_ins_id;
dark::Wire<7 + 3 + 1> full_ins_id;
dark::Wire<32> full_ins;
dark::Wire<5> decoded_rd;
dark::Wire<1> has_decoded_rd;
@ -17,6 +20,10 @@ struct RegisterFile_Input {
dark::Wire<1> has_decoded_rs1;
dark::Wire<5> decoded_rs2;
dark::Wire<1> has_decoded_rs2;
dark::Wire<1> is_committing;
dark::Wire<5> commit_ins_ROB_index;
dark::Wire<5> commit_reg_index;
dark::Wire<32> commit_reg_value;
};
struct RegisterFile_Output {
dark::Register<1> rs1_nodep;
@ -26,13 +33,63 @@ struct RegisterFile_Output {
dark::Register<5> rs2_deps;
dark::Register<32> rs2_value;
};
struct RegisterFile : public dark::Module<RegisterFile_Input, RegisterFile_Output> {
RegisterFile() {
// Constructor
}
void work() {
// Update function
}
struct RegisterFile_Private {
std::array<dark::Register<32>, kTotalRegisters> registers;
std::array<dark::Register<5>, kTotalRegisters> register_deps;
std::array<dark::Register<1>, kTotalRegisters> register_nodep;
};
}
struct RegisterFile : public dark::Module<RegisterFile_Input, RegisterFile_Output, RegisterFile_Private> {
RegisterFile() {
// Constructor
}
void work() {
if (bool(reset)) {
for(auto& reg : registers) {
reg <= 0;
}
for(auto& reg : register_deps) {
reg <= 0;
}
for(auto& reg : register_nodep) {
reg <= 1;
}
return;
}
if(bool(is_committing)) {
registers[static_cast<max_size_t>(commit_reg_index)] <= commit_reg_value;
if(register_deps[static_cast<max_size_t>(commit_reg_index)] == commit_ins_ROB_index) {
register_nodep[static_cast<max_size_t>(commit_reg_index)] <= 1;
}
}
if(bool(is_issuing)) {
if(bool(has_decoded_rs1)) {
if((!bool(is_committing))||(commit_reg_index != decoded_rs1)) {
rs1_deps <= register_deps[static_cast<max_size_t>(decoded_rs1)];
rs1_value <= registers[static_cast<max_size_t>(decoded_rs1)];
rs1_nodep <= register_nodep[static_cast<max_size_t>(decoded_rs1)];
} else {
rs1_deps <= 0;
rs1_value <= commit_reg_value;
rs1_nodep <= 1;
}
}
if(bool(has_decoded_rs2)) {
if((!bool(is_committing))||(commit_reg_index != decoded_rs2)) {
rs2_deps <= register_deps[static_cast<max_size_t>(decoded_rs2)];
rs2_value <= registers[static_cast<max_size_t>(decoded_rs2)];
rs2_nodep <= register_nodep[static_cast<max_size_t>(decoded_rs2)];
} else {
rs2_deps <= 0;
rs2_value <= commit_reg_value;
rs2_nodep <= 1;
}
}
if(bool(has_decoded_rd)) {
register_deps[static_cast<max_size_t>(decoded_rd)] <= static_cast<max_size_t>(issue_ROB_index);
register_nodep[static_cast<max_size_t>(decoded_rd)] <= 0;
}
}
}
};
} // namespace ZYM
#endif