Method String

instructions.go:180–210

()

func createAx(op opCode, a int) instruction { return instruction(op)<<posOp | instruction(a)<<posAx }

func (i instruction) String() string {
	op := i.opCode()
	s := opNames[op]
	switch opMode(op) {
	case iABC:
		s = fmt.Sprintf("%s %d", s, i.a())
		if bMode(op) == opArgK && isConstant(i.b()) {
			s = fmt.Sprintf("%s constant %d", s, constantIndex(i.b()))
		} else if bMode(op) != opArgN {
			s = fmt.Sprintf("%s %d", s, i.b())
		}
		if cMode(op) == opArgK && isConstant(i.c()) {
			s = fmt.Sprintf("%s constant %d", s, constantIndex(i.c()))
		} else if cMode(op) != opArgN {
			s = fmt.Sprintf("%s %d", s, i.c())
		}
	case iAsBx:
		s = fmt.Sprintf("%s %d", s, i.a())
		if bMode(op) != opArgN {
			s = fmt.Sprintf("%s %d", s, i.sbx())
		}
	case iABx:
		s = fmt.Sprintf("%s %d", s, i.a())
		if bMode(op) != opArgN {
			s = fmt.Sprintf("%s %d", s, i.bx())
		}
	case iAx:
		s = fmt.Sprintf("%s %d", s, i.ax())
	}
	return s
}

func opmode(t, a, b, c, m int) byte { return byte(t<<7 | a<<6 | b<<4 | c<<2 | m) }