From 3b01c3a71c66c44d9fe68d4eed1be71a1a90f2ac Mon Sep 17 00:00:00 2001
From: Giulio De Pasquale <giulio@depasquale.eu>
Date: Sat, 8 Jul 2017 22:57:56 +0200
Subject: [PATCH] MOVI: SP and RP banned

---
 vm/vm.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vm/vm.cpp b/vm/vm.cpp
index e035e7b..0e487e5 100644
--- a/vm/vm.cpp
+++ b/vm/vm.cpp
@@ -142,8 +142,8 @@ bool VM::execMOVI(void) {
   dst = as.code[regs[IP] + 1];
   imm = *((uint16_t *)&as.code[regs[IP] + 2]);
   DBG_INFO(("MOVI %s, 0x%x\n", getRegName(dst), imm));
-  if (dst == IP) {
-    DBG_ERROR(("Can't MOVI to IP!\n"));
+  if (dst == IP || dst == SP || dst == RP) {
+    DBG_ERROR(("MOVI: Invalid register!\n"));
     return false;
   }
   regs[dst] = imm;