PPC/s390: [regexp] Port RegExpExecStub to CSA (mostly)

src/s390/code-stubs-s390.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 1263 matching lines @@
   CHECK(r5.is(RegExpExecDescriptor::StringEndRegister()));
   CHECK(r4.is(RegExpExecDescriptor::StringStartRegister()));
 
   // Argument 2 (r3): Previous index.
   CHECK(r3.is(RegExpExecDescriptor::LastIndexRegister()));
 
   // Argument 1 (r2): Subject string.
   CHECK(r2.is(RegExpExecDescriptor::StringRegister()));
 
   // Locate the code entry and call it.
-  Register code_reg = RegExpDescriptor::CodeRegister();
+  Register code_reg = RegExpExecDescriptor::CodeRegister();
   __ AddP(code_reg, Operand(Code::kHeaderSize - kHeapObjectTag));
 
   DirectCEntryStub stub(isolate());
   stub.GenerateCall(masm, code_reg);
 
   __ LeaveExitFrame(false, no_reg, true);
 
   // Return the smi-tagged result.
   __ SmiTag(r2);
   __ Ret();
@@ skipping 1828 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390