s390: exploit high-word facility for Smi Ops

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 3813 matching lines @@
   // r5 : parameters pointer
   // r9 : JavaScript frame pointer
   // Registers used over whole function:
   // r7 : arguments count (tagged)
   // r8 : mapped parameter count (tagged)
 
   // Check if the calling frame is an arguments adaptor frame.
   Label adaptor_frame, try_allocate, runtime;
   __ LoadP(r6, MemOperand(r9, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(r2, MemOperand(r6, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ CmpSmiLiteral(r2, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
+  __ LoadSmiLiteral(r0, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
+  __ CmpP(r2, r0);
   __ beq(&adaptor_frame);
 
   // No adaptor, parameter count = argument count.
   __ LoadRR(r7, r4);
   __ LoadRR(r8, r4);
   __ b(&try_allocate);
 
   // We have an adaptor frame. Patch the parameters pointer.
   __ bind(&adaptor_frame);
   __ LoadP(r7, MemOperand(r6, ArgumentsAdaptorFrameConstants::kLengthOffset));
@@ skipping 658 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