package asm

import (
	"fmt"

	"git.akyoto.dev/cli/q/src/register"
)

// Instruction represents a single instruction which can be converted to machine code.
type Instruction struct {
	Mnemonic    Mnemonic
	Source      register.ID
	Destination register.ID
	Number      uint64
	Data        []byte
}

// String returns the assembler representation of the instruction.
func (x *Instruction) String() string {
	switch x.Mnemonic {
	case MOV:
		return fmt.Sprintf("%s %s, %x", x.Mnemonic, x.Destination, x.Number)
	case MOVDATA:
		return fmt.Sprintf("%s %s, %v", x.Mnemonic, x.Destination, x.Data)
	case SYSCALL:
		return x.Mnemonic.String()
	default:
		return ""
	}
}