From bafce57ad94cdb761215b37db6c586a13da44c9c Mon Sep 17 00:00:00 2001
From: Imanol-Mikel Barba Sabariego <imanol@imanolbarba.net>
Date: Tue, 27 Dec 2016 05:05:26 +0100
Subject: [PATCH] more intelligent decoding

---
 cpu.c | 73 +++++++++++--------------------------------------------------------------
 1 file changed, 11 insertions(+), 62 deletions(-)

diff --git a/cpu.c b/cpu.c
index a04e1f6..e07966c 100644
--- a/cpu.c
+++ b/cpu.c
@@ -245,88 +245,37 @@ void decode_instruction(uint16_t opcode, uint16_t *arg1, uint16_t *arg2, uint16_
     switch(opcode)
     {
         case HALT:
-            break;
-        case MOV:
-            *arg1 = fetch();
-            *arg2 = fetch();
+        case RET:
+        case NOP:
             break;
         case PUSH:
-            *arg1 = fetch();
-            break;
         case POP:
-            *arg1 = fetch();
-            break;
-        case TEQ:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
-        case TGT:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
         case JMP:
+        case CALL:
+        case OUT:
+        case IN:
             *arg1 = fetch();
             break;
+        case MOV:
         case JNZ:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            break;
         case JZ:
+        case NOT:
+        case LOAD:
+        case STOR:
             *arg1 = fetch();
             *arg2 = fetch();
             break;
+        case TEQ:
+        case TGT:
         case ADD:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
         case MUL:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
         case MOD:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
         case AND:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            *arg3 = fetch();
-            break;
         case OR:
             *arg1 = fetch();
             *arg2 = fetch();
             *arg3 = fetch();
             break;
-        case NOT:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            break;
-        case LOAD:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            break;
-        case STOR:
-            *arg1 = fetch();
-            *arg2 = fetch();
-            break;
-        case CALL:
-            *arg1 = fetch();
-            break;
-        case RET:
-            break;
-        case OUT:
-            *arg1 = fetch();
-            break;
-        case IN:
-            *arg1 = fetch();
-            break;
-        case NOP:
-            break;
         default:
             break;
     }
--
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