criscv/src/instruction_executor.c

#include "cpu.h"
#include <stdio.h>

static void printBinary(int num) {
    if (num > 1) {
        printBinary(num / 2);
    }
    printf("%d", num % 2);
}

int execute_instruction_on_cpu(CPU *cpu, uint32_t instruction) {
    AddressSpace *addressSpace = cpu->addressSpace;
    cpu->registers[0] = 0; // x0 is always 0

    uint8_t opcode = instruction & 0x7F;
    uint8_t rd = instruction >> 7 & 0x1F;

    if (opcode != 0) {
        printf("\nPC: %d\n", cpu->programCounter);
        printf("Instruction: ");
        printBinary(instruction);
        printf("\nOpcode: 0x%X (", opcode);
        printBinary(opcode);
        printf(")\n");
        printf("Dest. reg.: x%d\n", rd);
    }

    // TODO

    return 0;
}