PPC: Cleanup ABI-specifc code.

src/ppc/macro-assembler-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 <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
@@ skipping 3069 matching lines @@
 
 void MacroAssembler::CallCFunction(Register function, int num_arguments) {
   CallCFunction(function, num_arguments, 0);
 }
 
 
 void MacroAssembler::CallCFunctionHelper(Register function,
                                          int num_reg_arguments,
                                          int num_double_arguments) {
   DCHECK(has_frame());
-// Just call directly. The function called cannot cause a GC, or
-// allow preemption, so the return address in the link register
-// stays correct.
+
+  // Just call directly. The function called cannot cause a GC, or
+  // allow preemption, so the return address in the link register
+  // stays correct.
   Register dest = function;
-#if ABI_USES_FUNCTION_DESCRIPTORS && !defined(USE_SIMULATOR)
-  // AIX uses a function descriptor. When calling C code be aware
-  // of this descriptor and pick up values from it
-  LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(function, kPointerSize));
-  LoadP(ip, MemOperand(function, 0));
-  dest = ip;
-#elif ABI_CALL_VIA_IP
-  Move(ip, function);
-  dest = ip;
-#endif
+  if (ABI_USES_FUNCTION_DESCRIPTORS) {
+    // AIX/PPC64BE Linux uses a function descriptor. When calling C code be
+    // aware of this descriptor and pick up values from it
+    LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(function, kPointerSize));
+    LoadP(ip, MemOperand(function, 0));
+    dest = ip;
+  } else if (ABI_CALL_VIA_IP) {
+    Move(ip, function);
+    dest = ip;
+  }
 
   Call(dest);
 
   // Remove frame bought in PrepareCallCFunction
   int stack_passed_arguments =
       CalculateStackPassedWords(num_reg_arguments, num_double_arguments);
   int stack_space = kNumRequiredStackFrameSlots + stack_passed_arguments;
   if (ActivationFrameAlignment() > kPointerSize) {
     LoadP(sp, MemOperand(sp, stack_space * kPointerSize));
   } else {
@@ skipping 1211 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC