From c89ab134fb0cbe3dc8da76b4744bf18c3a181f1c Mon Sep 17 00:00:00 2001
From: Shashwat Shrivastava <shashwat.shrivastava@epfl.ch>
Date: Tue, 27 Feb 2024 20:10:42 +0100
Subject: [PATCH] Add Shifter

---
 part_1_combinational/Shifter.bsv | 39 +++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/part_1_combinational/Shifter.bsv b/part_1_combinational/Shifter.bsv
index b14cd38..e385869 100644
--- a/part_1_combinational/Shifter.bsv
+++ b/part_1_combinational/Shifter.bsv
@@ -13,6 +13,43 @@ endfunction
 
 
 function Vector#(16, Word) barrelLeft(Vector#(16, Word) in, Bit#(4) shftAmnt);
-    return unpack(0);
+    
+    Vector#(16, Word) resultVector = case (shftAmnt) matches
+        /*'b0000: in;
+        'b0001: (unpack(pack(in) >> 1));
+        'b0010: (unpack(pack(in) >> 2*16));
+        'b0011: (unpack(pack(in) << 3));
+        'b0100: (unpack(pack(in) << 4));
+        'b0101: (unpack(pack(in) << 5));
+        'b0110: (unpack(pack(in) << 6));
+        'b0111: (unpack(pack(in) << 7));
+        'b1000: (unpack(pack(in) << 8));
+        'b1001: (unpack(pack(in) << 9));
+        'b1010: (unpack(pack(in) << 10));
+        'b1011: (unpack(pack(in) << 11));
+        'b1100: (unpack(pack(in) << 12));
+        'b1101: (unpack(pack(in) << 13));
+        'b1110: (unpack(pack(in) << 14));
+        'b1111: (unpack(pack(in) << 15));*/
+        
+        'b0000: in;
+        'b0001: naiveShfl(in, 1);
+        'b0010: naiveShfl(in, 2);
+        'b0011: naiveShfl(in, 3);
+        'b0100: naiveShfl(in, 4);
+        'b0101: naiveShfl(in, 5);
+        'b0110: naiveShfl(in, 6);
+        'b0111: naiveShfl(in, 7);
+        'b1000: naiveShfl(in, 8);
+        'b1001: naiveShfl(in, 9);
+        'b1010: naiveShfl(in, 10);
+        'b1011: naiveShfl(in, 11);
+        'b1100: naiveShfl(in, 12);
+        'b1101: naiveShfl(in, 13);
+        'b1110: naiveShfl(in, 14);
+        'b1111: naiveShfl(in, 15);
+    
+    endcase;
+    return resultVector;
     // Implementation of a left barrel shifter
 endfunction