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#ifndef ALU_H
#define ALU_H
#include <cstdint>
#include <QString>
#include <QObject>
#include <registers.h>
// TODO Any other operations? We seems to be missing a lot of them.
enum AluOp : std::uint8_t {
ALU_OP_SLL = 0,
ALU_OP_SRL = 2,
ALU_OP_SRA,
ALU_OP_SLLV,
ALU_OP_SRLV = 6,
ALU_OP_SRAV,
ALU_OP_MFHI = 16,
ALU_OP_MTHI,
ALU_OP_MFLO,
ALU_OP_MTLO,
ALU_OP_ADD = 32,
ALU_OP_ADDU,
ALU_OP_SUB,
ALU_OP_SUBU,
ALU_OP_AND,
ALU_OP_OR,
ALU_OP_XOR,
ALU_OP_NOR,
ALU_OP_SLT = 42,
ALU_OP_SLTU,
ALU_OP_LAST = 64 // First impossible operation (just to be sure that we don't overflow)
};
// Do ALU operation.
// operation: This is function field from instruction or shifted opcode for immediate instructions
// s: Loaded from rs. Also calles as source.
// t: Loaded from rt or immediate field from instruction it self. Also called as target.
// sa: This is value directly from instruction it self (sa section) used for shift operations
// regs: Registers used. We need direct access to lo and hi registers (those are not accessed from core it self but from alu directly
// Returned value is commonly saved to rt/rd or any other way passed trough core
std::uint32_t alu_operate(enum AluOp operation, std::uint32_t s, std::uint32_t t, std::uint8_t sa, Registers *regs);
// Returns string representation of ALU instruction (internally used by Instruction::to_str)
QString alu_str(enum AluOp operation, std::uint32_t s, std::uint32_t t, std::uint8_t sa);
Q_DECLARE_METATYPE(AluOp)
#endif // ALU_H
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