From dfbf83a9a42907063aa5b3789f1ce9606de32e84 Mon Sep 17 00:00:00 2001
From: James Barnett <noreply@jamesbarnett.xyz>
Date: Thu, 28 Jun 2018 21:38:42 +0100
Subject: Add register flags and set from LDHL SP,n op

---
 src/main/kotlin/BitManipulation.kt | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/main/kotlin/BitManipulation.kt')

diff --git a/src/main/kotlin/BitManipulation.kt b/src/main/kotlin/BitManipulation.kt
index b4215e8..b655718 100644
--- a/src/main/kotlin/BitManipulation.kt
+++ b/src/main/kotlin/BitManipulation.kt
@@ -28,4 +28,15 @@ object BitManipulation {
     }
   }
 
+  fun isSignedBitNegative(value: Int): Boolean {
+    return value and (1 shl 7) != 0
+  }
+
+  fun getAbsoluteValue(value: Int ): Int{
+    return if(isSignedBitNegative(value)) {
+      0x0100 - value // 1 00000000 - 1xxxxxx = value, due to 2s compliment
+    } else {
+      value
+    }
+  }
 }
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