PPC64: Fix return value checks for generated regexp code.

src/ppc/code-stubs-ppc.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 2347 matching lines @@
   // what it thinks is C code compiled for the simulator/host
   // platform.
   __ LoadP(code, MemOperand(code, 0));  // Instruction address
 #endif
 
   DirectCEntryStub stub(isolate());
   stub.GenerateCall(masm, code);
 
   __ LeaveExitFrame(false, no_reg, true);
 
-  // r3: result
+  // r3: result (int32)
   // subject: subject string (callee saved)
   // regexp_data: RegExp data (callee saved)
   // last_match_info_elements: Last match info elements (callee saved)
   // Check the result.
   Label success;
-  __ cmpi(r3, Operand(1));
+  __ cmpwi(r3, Operand(1));
   // We expect exactly one result since we force the called regexp to behave
   // as non-global.
   __ beq(&success);
   Label failure;
-  __ cmpi(r3, Operand(NativeRegExpMacroAssembler::FAILURE));
+  __ cmpwi(r3, Operand(NativeRegExpMacroAssembler::FAILURE));
   __ beq(&failure);
-  __ cmpi(r3, Operand(NativeRegExpMacroAssembler::EXCEPTION));
+  __ cmpwi(r3, Operand(NativeRegExpMacroAssembler::EXCEPTION));
   // If not exception it can only be retry. Handle that in the runtime system.
   __ bne(&runtime);
   // Result must now be exception. If there is no pending exception already a
   // stack overflow (on the backtrack stack) was detected in RegExp code but
   // haven't created the exception yet. Handle that in the runtime system.
   // TODO(592): Rerunning the RegExp to get the stack overflow exception.
   __ mov(r4, Operand(isolate()->factory()->the_hole_value()));
   __ mov(r5, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                        isolate())));
   __ LoadP(r3, MemOperand(r5, 0));
@@ skipping 3194 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_PPC