Try-Sim-2507/emu.h at main · FZL-Ted/Try-Sim-2507 · GitHub

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/* <fangzhilinwold@foxmail.com>
 * ted's toy rv32 emu
 */

#ifndef EMU_H
#define EMU_H

#include<stdio.h>
#include<stdint.h>
#include<assert.h>
#include<stdlib.h>
#include<stdbool.h>
#include<string.h>


// NOTE: There is no space between name and parenthesis.
#define Assert(cond, format, ...) \
    do{ \
        if(!(cond)) { \
            fprintf(stderr, format "\n", ##__VA_ARGS__); \
            assert(cond); \
        } \
    }while(0)
#define MSIZE 600000
#define MCYCLE 6001

typedef struct machine_status_t {
    uint32_t PC, REG[16], REG_discard; // REG[0]===0
    uint8_t MEM[MSIZE];
    bool isRunning;
} machine_status_t;

typedef union{
    struct{
        uint32_t opcode     : 7;
        uint32_t rd         : 5;
        uint32_t func3      : 3;
        uint32_t rs1        : 5;
        uint32_t rs2        : 5;
        uint32_t func7      : 7;
    }R;
    struct{
        uint32_t opcode     : 7;
        uint32_t rd         : 5;
        uint32_t func3      : 3;
        uint32_t rs1        : 5;
        int32_t imm11_0     :12; // sign-extended
    }I; // J
    struct{
        uint32_t opcode     : 7;
        uint32_t imm4_0     : 5; // zero-extended
        uint32_t func3      : 3;
        uint32_t rs1        : 5;
        uint32_t rs2        : 5;
        int32_t imm11_5     : 7; // sign-extended
    }S;
    struct{
        uint32_t opcode     : 7;
        uint32_t rd         : 5;
        uint32_t imm31_12   :20; // zero-extended
    }U;
    struct{
        uint32_t opcode     : 7;
        uint32_t imm4_1_11  : 5; // zero-extended
        uint32_t func3      : 3;
        uint32_t rs1        : 5;
        uint32_t rs2        : 5;
        uint32_t imm12_10_5 : 7; // zero-extended
    }B;
    uint32_t bytes;
} inst_t;


enum inst_list_t{
    // RV32I
    i_lui, i_auipc,
    i_jal,
    i_jalr,
    i_beq, i_bne, i_blt, i_bge, i_bltu, i_bgeu,
    i_lb, i_lh, i_lw, i_lbu, i_lhu,
    i_sb, i_sh, i_sw,
    i_addi, i_slti, i_sltiu, i_xori, i_ori, i_andi,
    i_slli, i_srli, i_srai,
    i_add, i_sub, i_sll, i_slt, i_sltu, i_xor, i_srl, i_sra, i_or, i_and,
    i_fence, i_fence_i,
    i_ecall, i_ebreak,
    // RV32 CSR
    i_csrrw, i_csrrs, i_csrrc,
    i_csrrwi, i_csrrsi, i_csrrci,
    INST_NUM
};


typedef void (*inst_exe_t)(machine_status_t*, inst_t);
extern inst_exe_t inst_exe_arr[INST_NUM]; // so all can use, define in runcode.c


#endif // emu.h