added code for sign extending imm's

src/vminstrs.cpp

@@ -194,6 +194,16 @@ namespace vm::instrs
                 vm::instrs::decrypt_operand( vm_handler.transforms, imm_val.value(), entry.decrypt_key ).first;
         }
 
+        if ( profile && vm_handler.imm_size && profile->extention == vm::handler::extention_t::sign_extend )
+        {
+            if ( result.operand.imm.u >> ( vm_handler.imm_size - 1 ) )
+            {
+                result.operand.imm.u =
+                    ( ( std::numeric_limits< std::uint64_t >::max() >> vm_handler.imm_size ) << vm_handler.imm_size ) +
+                    result.operand.imm.u;
+            }
+        }
+
         return result;
     }