[wasm] Introduce the TrapIf and TrapUnless operators to generate trap code.

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1183 matching lines @@
 static void f64_mod_wrapper(double* param0, double* param1) {
   WriteDoubleValue(param0,
                    modulo(ReadDoubleValue(param0), ReadDoubleValue(param1)));
 }
 
 ExternalReference ExternalReference::f64_mod_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_mod_wrapper)));
 }
 
+ExternalReference ExternalReference::wasm_call_trap_callback_for_testing(
+    Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(wasm::call_trap_callback_for_testing)));
+}
+
 ExternalReference ExternalReference::log_enter_external_function(
     Isolate* isolate) {
   return ExternalReference(
       Redirect(isolate, FUNCTION_ADDR(Logger::EnterExternal)));
 }
 
 
 ExternalReference ExternalReference::log_leave_external_function(
     Isolate* isolate) {
   return ExternalReference(
@@ skipping 710 matching lines @@
 
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 }  // namespace internal
 }  // namespace v8