Support movz with operands of equal sizes

Fixes https://github.com/yegord/snowman/issues/153
bon3less · Jan 10, 2018 · 9b39ef9 · 9b39ef9
1 parent 505db12
commit 9b39ef9
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/src/nc/arch/x86/X86InstructionAnalyzer.cpp b/src/nc/arch/x86/X86InstructionAnalyzer.cpp
@@ -857,7 +857,15 @@ class X86InstructionAnalyzerImpl {
                 break;
             }
             case UD_Imovzx: {
-                _[operand(0) ^= zero_extend(operand(1))];
+                auto operand0 = operand(0);
+                auto operand1 = operand(1);
+
+                if (operand0.size() > operand1.size()) {
+                    _[std::move(operand0) ^= zero_extend(std::move(operand1))];
+                } else {
+                    /* Yes, movzww exists: https://github.com/yegord/snowman/issues/153 */
+                    _[std::move(operand0) ^= std::move(operand1)];
+                }
                 break;
             }
             case UD_Ineg: {