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risc-v-tlm/inc/C_extension.h

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/*!
\file C_extension.h
\brief Implement C extensions part of the RISC-V
\author Màrius Montón
\date August 2018
*/
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef C_EXTENSION__H
#define C_EXTENSION__H
#include "systemc"
#include "extension_base.h"
namespace riscv_tlm {
typedef enum {
OP_C_ADDI4SPN,
OP_C_FLD,
OP_C_LW,
OP_C_FLW,
OP_C_FSD,
OP_C_SW,
OP_C_FSW,
OP_C_NOP,
OP_C_ADDI,
OP_C_JAL,
OP_C_LI,
OP_C_ADDI16SP,
OP_C_LUI,
OP_C_SRLI,
OP_C_SRAI,
OP_C_ANDI,
OP_C_SUB,
OP_C_XOR,
OP_C_OR,
OP_C_AND,
OP_C_J,
OP_C_BEQZ,
OP_C_BNEZ,
OP_C_SLLI,
OP_C_FLDSP,
OP_C_LWSP,
OP_C_FLWSP,
OP_C_JR,
OP_C_MV,
OP_C_EBREAK,
OP_C_JALR,
OP_C_ADD,
OP_C_FSDSP,
OP_C_SWSP,
OP_C_FSWSP,
OP_C_ERROR
} op_C_Codes;
typedef enum {
C_ADDI4SPN = 0b000,
C_FLD = 0b001,
C_LW = 0b010,
C_FLW = 0b011,
C_FSD = 0b101,
C_SW = 0b110,
C_FSW = 0b111,
C_ADDI = 0b000,
C_JAL = 0b001,
C_LI = 0b010,
C_ADDI16SP = 0b011,
C_SRLI = 0b100,
C_2_SRLI = 0b00,
C_2_SRAI = 0b01,
C_2_ANDI = 0b10,
C_2_SUB = 0b11,
C_3_SUB = 0b00,
C_3_XOR = 0b01,
C_3_OR = 0b10,
C_3_AND = 0b11,
C_J = 0b101,
C_BEQZ = 0b110,
C_BNEZ = 0b111,
C_SLLI = 0b000,
C_FLDSP = 0b001,
C_LWSP = 0b010,
C_FLWSP = 0b011,
C_JR = 0b100,
C_FDSP = 0b101,
C_SWSP = 0b110,
C_FWWSP = 0b111,
} C_Codes;
/**
* @brief Instruction decoding and fields access
*/
class C_extension : public extension_base {
public:
/**
* @brief Constructor, same as base clase
*/
using extension_base::extension_base;
/**
* @brief Access to opcode field
* @return return opcode field
*/
inline std::int32_t opcode() const override {
return static_cast<std::int32_t>(m_instr.range(1, 0));
}
inline std::int32_t get_rdp() const {
return static_cast<std::int32_t>(m_instr.range(4, 2) + 8);
}
/**
* @brief Access to rs1 field
* @return rs1 field
*/
inline std::int32_t get_rs1() const override {
return static_cast<std::int32_t>(m_instr.range(11, 7));
}
inline void set_rs1(std::int32_t value) override {
m_instr.range(11, 7) = value;
}
inline std::int32_t get_rs1p() const {
return static_cast<std::int32_t>(m_instr.range(9, 7) + 8);
}
/**
* @brief Access to rs2 field
* @return rs2 field
*/
inline std::int32_t get_rs2() const override {
return static_cast<std::int32_t>(m_instr.range(6, 2));
}
inline void set_rs2(std::int32_t value) override {
m_instr.range(6, 2) = value;
}
inline std::int32_t get_rs2p() const {
return static_cast<std::int32_t>(m_instr.range(4, 2) + 8);
}
inline std::int32_t get_funct3() const override {
return static_cast<std::int32_t>(m_instr.range(15, 13));
}
inline void set_funct3(std::int32_t value) override {
m_instr.range(15, 13) = value;
}
/**
* @brief Access to immediate field for I-type
* @return immediate_I field
*/
inline std::int32_t get_imm_I() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr.range(31, 20));
/* sign extension (optimize) */
if (m_instr[31] == 1) {
aux |= (0b11111111111111111111) << 12;
}
return aux;
}
inline void set_imm_I(std::int32_t value) {
m_instr.range(31, 20) = value;
}
/**
* @brief Access to immediate field for S-type
* @return immediate_S field
*/
inline std::int32_t get_imm_S() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr.range(31, 25) << 5);
aux |= static_cast<std::int32_t>(m_instr.range(11, 7));
if (m_instr[31] == 1) {
aux |= (0b11111111111111111111) << 12;
}
return aux;
}
inline void set_imm_S(std::int32_t value) {
sc_dt::sc_uint<32> aux = value;
m_instr.range(31, 25) = aux.range(11, 5);
m_instr.range(11, 7) = aux.range(4, 0);
}
/**
* @brief Access to immediate field for U-type
* @return immediate_U field
*/
inline std::int32_t get_imm_U() const {
return static_cast<std::int32_t>(m_instr.range(31, 12));
}
inline void set_imm_U(std::int32_t value) {
m_instr.range(31, 12) = (value << 12);
}
/**
* @brief Access to immediate field for B-type
* @return immediate_B field
*/
inline std::int32_t get_imm_B() const {
std::int32_t aux = 0;
aux |= static_cast<std::int32_t>(m_instr[7] << 11);
aux |= static_cast<std::int32_t>(m_instr.range(30, 25) << 5);
aux |= static_cast<std::int32_t>(m_instr[31] << 12);
aux |= static_cast<std::int32_t>(m_instr.range(11, 8) << 1);
if (m_instr[31] == 1) {
aux |= (0b11111111111111111111) << 12;
}
return aux;
}
inline void set_imm_B(std::int32_t value) {
sc_dt::sc_uint<32> aux = value;
m_instr[31] = aux[12];
m_instr.range(30, 25) = aux.range(10, 5);
m_instr.range(11, 7) = aux.range(4, 1);
m_instr[6] = aux[11];
}
/**
* @brief Access to immediate field for J-type
* @return immediate_J field
*/
inline std::int32_t get_imm_J() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 11);
aux |= static_cast<std::int32_t>(m_instr[11] << 4);
aux |= static_cast<std::int32_t>(m_instr[10] << 9);
aux |= static_cast<std::int32_t>(m_instr[9] << 8);
aux |= static_cast<std::int32_t>(m_instr[8] << 10);
aux |= static_cast<std::int32_t>(m_instr[7] << 6);
aux |= static_cast<std::int32_t>(m_instr[6] << 7);
aux |= static_cast<std::int32_t>(m_instr.range(5, 3) << 1);
aux |= static_cast<std::int32_t>(m_instr[2] << 5);
if (m_instr[12] == 1) {
aux |= 0b11111111111111111111 << 12;
}
return aux;
}
inline void set_imm_J(std::int32_t value) {
sc_dt::sc_uint<32> aux = (value << 20);
m_instr[31] = aux[20];
m_instr.range(30, 21) = aux.range(10, 1);
m_instr[20] = aux[11];
m_instr.range(19, 12) = aux.range(19, 12);
}
inline std::int32_t get_imm_L() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr.range(12, 10) << 3);
aux |= static_cast<std::int32_t>(m_instr[6] << 2);
aux |= static_cast<std::int32_t>(m_instr[5] << 6);
return aux;
}
inline std::int32_t get_imm_LWSP() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 5);
aux |= static_cast<std::int32_t>(m_instr.range(6, 4) << 2);
aux |= static_cast<std::int32_t>(m_instr.range(3, 2) << 6);
return aux;
}
inline std::int32_t get_imm_ADDI() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 5);
aux |= static_cast<std::int32_t>(m_instr.range(6, 2));
if (m_instr[12] == 1) {
aux |= 0b11111111111111111111111111 << 6;
}
return aux;
}
inline std::int32_t get_imm_ADDI4SPN() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr.range(12, 11) << 4);
aux |= static_cast<std::int32_t>(m_instr.range(10, 7) << 6);
aux |= static_cast<std::int32_t>(m_instr[6] << 2);
aux |= static_cast<std::int32_t>(m_instr[5] << 3);
return aux;
}
inline std::int32_t get_imm_ADDI16SP() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 9);
aux |= static_cast<std::int32_t>(m_instr[6] << 4);
aux |= static_cast<std::int32_t>(m_instr[5] << 6);
aux |= static_cast<std::int32_t>(m_instr[4] << 8);
aux |= static_cast<std::int32_t>(m_instr[3] << 7);
aux |= static_cast<std::int32_t>(m_instr[2] << 5);
if (m_instr[12] == 1) {
aux |= 0b1111111111111111111111 << 10;
}
return aux;
}
inline std::int32_t get_imm_CSS() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr.range(12, 9) << 2);
aux |= static_cast<std::int32_t>(m_instr.range(8, 7) << 6);
return aux;
}
inline std::int32_t get_imm_CB() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 8);
aux |= static_cast<std::int32_t>(m_instr[11] << 4);
aux |= static_cast<std::int32_t>(m_instr[10] << 3);
aux |= static_cast<std::int32_t>(m_instr[6] << 7);
aux |= static_cast<std::int32_t>(m_instr[5] << 6);
aux |= static_cast<std::int32_t>(m_instr[4] << 2);
aux |= static_cast<std::int32_t>(m_instr[3] << 1);
aux |= static_cast<std::int32_t>(m_instr[2] << 5);
if (m_instr[12] == 1) {
aux |= 0b11111111111111111111111 << 9;
}
return aux;
}
inline std::int32_t get_imm_LUI() const {
std::int32_t aux = 0;
aux = static_cast<std::int32_t>(m_instr[12] << 17);
aux |= static_cast<std::int32_t>(m_instr.range(6, 2) << 12);
if (m_instr[12] == 1) {
aux |= 0b111111111111111 << 17;
}
return aux;
}
inline std::int32_t get_csr() const {
return get_imm_I();
}
/**
* @brief Decodes opcode of instruction
* @return opcode of instruction
*/
op_C_Codes decode() const;
bool Exec_C_JR();
bool Exec_C_MV();
bool Exec_C_LWSP();
bool Exec_C_ADDI4SPN();
bool Exec_C_SLLI();
bool Exec_C_ADDI16SP();
bool Exec_C_SWSP();
bool Exec_C_BEQZ();
bool Exec_C_BNEZ();
bool Exec_C_LI();
bool Exec_C_SRLI();
bool Exec_C_SRAI();
bool Exec_C_ANDI();
bool Exec_C_ADD();
bool Exec_C_SUB();
bool Exec_C_XOR();
bool Exec_C_OR();
bool Exec_C_AND();
bool Exec_C_ADDI() const;
bool Exec_C_JALR();
bool Exec_C_LW();
bool Exec_C_SW();
bool Exec_C_JAL(int m_rd);
bool Exec_C_EBREAK();
bool process_instruction(Instruction &inst, bool *breakpoint = nullptr);
};
}
#endif
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