psxc/include/insn.h

#ifndef PSXC_INSN_H_
#define PSXC_INSN_H_

#include "cpu.h"

#include <stdint.h>

typedef enum {
  SPECIAL = 0x00,
  BCONDZ = 0x01,
  J = 0x02,
  JAL = 0x03,
  BEQ = 0x04,
  BNE = 0x05,
  BLEZ = 0x06,
  BGTZ = 0x07,
  ADDI = 0x08,
  ADDIU = 0x09,
  SLTI = 0x0a,
  SLTIU = 0x0b,
  ANDI = 0x0c,
  ORI = 0x0d,
  XORI = 0x0e,
  LUI = 0x0f,
  COP0 = 0x10,
  COP1 = 0x11,
  COP2 = 0x12,
  COP3 = 0x13,
  LB = 0x20,
  LH = 0x21,
  LWL = 0x22,
  LW = 0x23,
  LBU = 0x24,
  LHU = 0x25,
  LWR = 0x26,
  SB = 0x28,
  SH = 0x29,
  SWL = 0x2a,
  SW = 0x2b,
  SWR = 0x2e,
  LWC0 = 0x30,
  LWC1 = 0x31,
  LWC2 = 0x32,
  LWC3 = 0x33,
  SWC0 = 0x38,
  SWC1 = 0x39,
  SWC2 = 0x3a,
  SWC3 = 0x3b,
} op_primary_t;

static inline op_primary_t extract_primary_op(uint32_t insn) {
  return (insn >> 26) & 0x3f;
}

typedef enum {
  SLL = 0x00,
  SRL = 0x02,
  SRA = 0x03,
  SLLV = 0x04,
  SRLV = 0x06,
  SRAV = 0x07,
  JR = 0x08,
  JALR = 0x09,
  SYSCALL = 0x0c,
  BREAK = 0x0d,
  MFHI = 0x10,
  MTHI = 0x11,
  MFLO = 0x12,
  MTLO = 0x13,
  MULT = 0x18,
  MULTU = 0x19,
  DIV = 0x1a,
  DIVU = 0x1b,
  ADD = 0x20,
  ADDU = 0x21,
  SUB = 0x22,
  SUBU = 0x23,
  AND = 0x24,
  OR = 0x25,
  XOR = 0x26,
  NOR = 0x27,
  SLT = 0x2a,
  SLTU = 0x2b,
} op_secondary_t;

static inline op_secondary_t extract_secondary_op(uint32_t insn) {
  return (insn >> 0) & 0x3f;
}

void insn_execute(cpu_t *cpu, uint32_t insn);

#endif