将MIPS指令转换为二进制，然后转换为十六进制

Question

对于班级项目，我至少需要读取一个文件，以获取MIPS指令，例如：

add $t0, $s1, $s4
addi $t1, $a0, 7

等等...（我可以根据需要创建文件，而我只需要担心I和R格式） 我的问题是从文件中读取并首先将其实际转换为二进制，然后将二进制转换为十六进制应该不难。 我只是不确定如何正确阅读说明并将其转换为二进制。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 10
#define SIZE 128
struct{
        const char *name;
        char *address;
}registers[] = {{ "zero", "00000"},
                { "at", "00001" },
                { "v0", "00010" },
                { "v1", "00011" },
                { "a0", "00100" },
                { "a1", "00101" },
                { "a2", "00110" },
                { "a3", "00111" },
                { "t0", "01000" },
                { "t1", "01001" },
                { "t2", "01010" },
                { "t3", "01011" },
                { "t4", "01100" },
                { "t5", "01101" },
                { "t6", "01110" },
                { "t7", "01111" },
                { "s0", "10000" },
                { "s1", "10001" },
                { "s2", "10010" },
                { "s3", "10011" },
                { "s4", "10100" },
                { "s5", "10101" },
                { "s6", "10110" },
                { "s7", "10111" },
                { "t8", "11000" },
                { "t9", "11001" },
                { NULL, 0 } };


struct{
        const char *name;
        char *function;
}rInst[] = {{ "add", "100000" },
                { "sub", "100001" },
                { "and", "100100" },
                { "or",  "100101" },
                { "sll", "000000" },
                { "slt", "101010" },
                { "srl", "000010" },
                { "jr",  "001000" },
                { NULL, 0 } };

struct {
        const char *name;
        char *function;
} iInst[] = {{ "lw",   "100011" },
                { "sw",   "101011" },
                { "andi", "001100" },
                { "ori",  "001101" },
                { "lui",  "001111" },
                { "beq",  "000100" },
                { "slti", "001010" },
                { "addi", "001000" },
                { NULL, 0 } };

struct inst{
        char opcode[MAX];
        char register1[MAX];
        char register2[MAX];
        char register3[MAX];
        int num;
        struct inst *next;
}*first, *current;

int main(){
         FILE *fp = fopen( "/home/js0939/CompOrg/MIPSLab5.txt", "r");
         char *result[10][4];
         char line[SIZE];
         char *value;
         if(fp == NULL){
                 printf("Error.");
                 return 1;
         }


    int i=0;
    int j=0;
    int k=0;
    int l=0;
    char* func;
    char* reg;

    // loop through each entry in file
    while(fgets(line, sizeof(line), fp)){
        //retrieves instruction
        value = strtok(line, " ");
        result[i][0] = strdup(value);
        for (i = 0; rInst[i].name != NULL; i++) {
                if (strcmp(value, rInst[i].name) == 0) {
                        func = rInst[i].function;
                        printf("%s ", func);
                }
        }

        for (i = 0; iInst[i].name != NULL; i++) {
                if (strcmp(value, iInst[i].name) == 0) {
                        func = iInst[i].function;
                        printf("%s ", func);
                }
        }

        //retrieves first register
        value = strtok(NULL, " ");
        result[i][1] = strdup(value);
        printf("%s ", value);
        for (i = 0; registers[i].name != NULL; i++){
                if(strcmp(value, registers[i].address) == 0){
                        reg = registers[i].address;
                        printf("%s ", reg);
                }
        }

        //retreives second register
        value = strtok(NULL, " ");
    result[i][2] = strdup(value);
        printf("%s ", value);
        for (i = 0; registers[i].name != NULL; i++){
                if(strcmp(value, registers[i].address) == 0){
                        reg = registers[i].address;
                        printf("%s ", reg);
                }
        }


        //retreives third register
        value = strtok(NULL, " \n");
        result[i][3] = strdup(value);
        printf("%s ", value);
        for (i = 0; registers[i].name != NULL; i++){
                if(strcmp(value, registers[i].address) == 0){
                        reg = registers[i].address;
                        printf("%s ", reg);
                }
        }


        //go to next line
        printf("\n");
        i++;
    }

    fclose(fp);
    return 0;
}