// Read a register address from the file input.
func NextOpcode(fileInput io.Reader) (result opcode.Opcode, err error) {
num, err := NextCodepoint(fileInput)
if err == nil {
result = opcode.Opcode(num)
}
return result, err
}
func (m *Machine) ExecuteNextInstruction() {
op := opcode.Opcode(m.Memory[m.InstrPtr])
m.InstrPtr += 1
switch op {
case opcode.Halt:
panic(EXIT_HALT)
case opcode.Set:
m.DoSet()
case opcode.Push:
m.DoPush()
case opcode.Pop:
m.DoPop()
case opcode.Eq:
m.DoEq()
case opcode.Gt:
m.DoGt()
case opcode.Jmp:
m.DoJmp()
case opcode.Jt:
m.DoJt()
case opcode.Jf:
m.DoJf()
case opcode.Add:
m.DoAdd()
case opcode.Mult:
m.DoMult()
case opcode.Mod:
m.DoMod()
case opcode.And:
m.DoAnd()
case opcode.Or:
m.DoOr()
case opcode.Not:
m.DoNot()
case opcode.Rmem:
m.DoRmem()
case opcode.Wmem:
m.DoWmem()
case opcode.Call:
m.DoCall()
case opcode.Ret:
m.DoRet()
case opcode.Out:
m.DoOut()
case opcode.In:
m.DoIn()
case opcode.Noop:
// nothing
default:
panic(EXIT_UNRECOGNIZED_INSTR)
}
}