From: adam <adam@megacz.com>
Date: Mon, 3 Nov 2008 09:52:15 +0000 (+0100)
Subject: add safety check to Instruction.Shift() constructor
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=e8ac974f2182e9c342b7cfc1520a1a1e121b1b49;p=fleet.git

add safety check to Instruction.Shift() constructor
---

diff --git a/src/edu/berkeley/fleet/api/Instruction.java b/src/edu/berkeley/fleet/api/Instruction.java
index eb7a83e..eee2480 100644
--- a/src/edu/berkeley/fleet/api/Instruction.java
+++ b/src/edu/berkeley/fleet/api/Instruction.java
@@ -218,6 +218,10 @@ public abstract class Instruction {
             super(dock, looping, predicate);
             this.immediate = immediate;
             this.immediate.setImmutable();
+            if (immediate.length() != dock.getShip().getFleet().getShiftWidth())
+                throw new RuntimeException("attempt to create a Shift instruction with a "+immediate.length()+
+                                           "-bit immediate on a Fleet that uses "+dock.getShip().getFleet().getShiftWidth()+
+                                           "-bit shift instructions");
         }
         public String toString() { return super.toString()+"shift "+immediate; }
     }