consts.h

#include <stdint.h>
#include <stdlib.h>

#ifndef CONSTS_H
#define CONSTS_H

// Debugging
// #define DEBUG
#ifdef DEBUG
#define D
#else
#define D if(0)
#endif

// Sign extend to 64-bit
#define EXT64I(value) ((int64_t)(int32_t)value)

// Signal codes
#define SIG_HALT_PROGRAM 1

// Error codes
#define ERROR_IO_ERROR           -1
#define ERROR_INVALID_CONFIG     -2
#define ERROR_INVALID_ELF        -3
#define ERROR_UNKNOWN_OPCODE     -4
#define ERROR_UNKNOWN_FUNCT      -5
#define ERROR_OVERFLOW           -6
#define ERROR_INVALID_MEM_ADDR   -7
#define ERROR_INVALID_CACHE_SIZE -8
#define ERROR_MEMORY_ERROR       -9

// Index of special registers
#define r_at 1
#define r_v0 2
#define r_v1 3
#define r_sp 29
#define r_ra 31

// Misc
#define KB 1024
#define INSTRUCTION_SIZE sizeof(uint32_t)

// Registers
uint32_t regs[32]; // General purpose
uint32_t PC;       // Program counter

// Counters
size_t instr_cnt;  // Number of instructions executed
size_t cycles;     // Number of cycles executed
size_t hits;       // Number of cache hits
size_t misses;     // Number of cache misses

#endif