Introduce x87 port

src/x87/builtins-x87.cc

Index: src/x87/builtins-x87.cc
diff --git a/src/ia32/builtins-ia32.cc b/src/x87/builtins-x87.cc
similarity index 99%
copy from src/ia32/builtins-ia32.cc
copy to src/x87/builtins-x87.cc
index 969aae19dff073bcb9919ca1894443a36fc0c278..edb4ad7f9844ea67f8125534cb83b24d1b3117bd 100644
--- a/src/ia32/builtins-ia32.cc
+++ b/src/x87/builtins-x87.cc
@@ -4,7 +4,7 @@
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_X87
 
 #include "codegen.h"
 #include "deoptimizer.h"
@@ -651,8 +651,7 @@ void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) {
 }
 
 
-static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
-                                             SaveFPRegsMode save_doubles) {
+static void Generate_NotifyStubFailureHelper(MacroAssembler* masm) {
   // Enter an internal frame.
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
@@ -661,7 +660,7 @@ static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
     // stubs that tail call the runtime on deopts passing their parameters in
     // registers.
     __ pushad();
-    __ CallRuntime(Runtime::kHiddenNotifyStubFailure, 0, save_doubles);
+    __ CallRuntime(Runtime::kHiddenNotifyStubFailure, 0);
     __ popad();
     // Tear down internal frame.
   }
@@ -672,12 +671,13 @@ static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
 
 
 void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) {
-  Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs);
+  Generate_NotifyStubFailureHelper(masm);
 }
 
 
 void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) {
-  Generate_NotifyStubFailureHelper(masm, kSaveFPRegs);
+  // SaveDoubles is meanless for X87, just used by deoptimizer.cc
+  Generate_NotifyStubFailureHelper(masm);
 }
 
 
@@ -1440,4 +1440,4 @@ void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
 }
 }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_TARGET_ARCH_X87