X87: Unify some PlatformCodeStubs

port r23631.

original commit message:

  Unify some PlatformCodeStubs

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/540763002

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23670 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x87/code-stubs-x87.cc

@@ -1437,18 +1437,10 @@ void ICCompareStub::GenerateGeneric(MacroAssembler* masm) {
 
   // Inline comparison of ASCII strings.
   if (cc == equal) {
-    StringCompareStub::GenerateFlatAsciiStringEquals(masm,
-                                                     edx,
-                                                     eax,
-                                                     ecx,
-                                                     ebx);
+    StringHelper::GenerateFlatAsciiStringEquals(masm, edx, eax, ecx, ebx);
   } else {
-    StringCompareStub::GenerateCompareFlatAsciiStrings(masm,
-                                                       edx,
-                                                       eax,
-                                                       ecx,
-                                                       ebx,
-                                                       edi);
+    StringHelper::GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx,
+                                                  edi);
   }
 #ifdef DEBUG
   __ Abort(kUnexpectedFallThroughFromStringComparison);
@@ -2871,11 +2863,10 @@ void SubStringStub::Generate(MacroAssembler* masm) {
 }
 
 
-void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm,
-                                                      Register left,
-                                                      Register right,
-                                                      Register scratch1,
-                                                      Register scratch2) {
+void StringHelper::GenerateFlatAsciiStringEquals(MacroAssembler* masm,
+                                                 Register left, Register right,
+                                                 Register scratch1,
+                                                 Register scratch2) {
   Register length = scratch1;
 
   // Compare lengths.
@@ -2907,12 +2898,9 @@ void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm,
 }
 
 
-void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
-                                                        Register left,
-                                                        Register right,
-                                                        Register scratch1,
-                                                        Register scratch2,
-                                                        Register scratch3) {
+void StringHelper::GenerateCompareFlatAsciiStrings(
+    MacroAssembler* masm, Register left, Register right, Register scratch1,
+    Register scratch2, Register scratch3) {
   Counters* counters = masm->isolate()->counters();
   __ IncrementCounter(counters->string_compare_native(), 1);
 
@@ -2973,13 +2961,9 @@ void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
 }
 
 
-void StringCompareStub::GenerateAsciiCharsCompareLoop(
-    MacroAssembler* masm,
-    Register left,
-    Register right,
-    Register length,
-    Register scratch,
-    Label* chars_not_equal,
+void StringHelper::GenerateAsciiCharsCompareLoop(
+    MacroAssembler* masm, Register left, Register right, Register length,
+    Register scratch, Label* chars_not_equal,
     Label::Distance chars_not_equal_near) {
   // Change index to run from -length to -1 by adding length to string
   // start. This means that loop ends when index reaches zero, which
@@ -3033,7 +3017,7 @@ void StringCompareStub::Generate(MacroAssembler* masm) {
   __ pop(ecx);
   __ add(esp, Immediate(2 * kPointerSize));
   __ push(ecx);
-  GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx, edi);
+  StringHelper::GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx, edi);
 
   // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
@@ -3306,11 +3290,10 @@ void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
 
   // Compare flat ASCII strings. Returns when done.
   if (equality) {
-    StringCompareStub::GenerateFlatAsciiStringEquals(
-        masm, left, right, tmp1, tmp2);
+    StringHelper::GenerateFlatAsciiStringEquals(masm, left, right, tmp1, tmp2);
   } else {
-    StringCompareStub::GenerateCompareFlatAsciiStrings(
-        masm, left, right, tmp1, tmp2, tmp3);
+    StringHelper::GenerateCompareFlatAsciiStrings(masm, left, right, tmp1, tmp2,
+                                                  tmp3);
   }
 
   // Handle more complex cases in runtime.

src/x87/code-stubs-x87.h

@@ -16,22 +16,6 @@ void ArrayNativeCode(MacroAssembler* masm,
                      Label* call_generic_code);
 
 
-class StoreBufferOverflowStub : public PlatformCodeStub {
- public:
-  explicit StoreBufferOverflowStub(Isolate* isolate)
-      : PlatformCodeStub(isolate) { }
-
-  void Generate(MacroAssembler* masm);
-
-  static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
-  virtual bool SometimesSetsUpAFrame() { return false; }
-
- private:
-  Major MajorKey() const { return StoreBufferOverflow; }
-  uint32_t MinorKey() const { return 0; }
-};
-
-
 class StringHelper : public AllStatic {
  public:
   // Generate code for copying characters using the rep movs instruction.
@@ -49,45 +33,24 @@ class StringHelper : public AllStatic {
                                Register hash,
                                Register character,
                                Register scratch);
+
   static void GenerateHashAddCharacter(MacroAssembler* masm,
                                        Register hash,
                                        Register character,
                                        Register scratch);
+
   static void GenerateHashGetHash(MacroAssembler* masm,
                                   Register hash,
                                   Register scratch);
 
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper);
-};
-
-
-class SubStringStub: public PlatformCodeStub {
- public:
-  explicit SubStringStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
-
- private:
-  Major MajorKey() const { return SubString; }
-  uint32_t MinorKey() const { return 0; }
-
-  void Generate(MacroAssembler* masm);
-};
-
-
-class StringCompareStub: public PlatformCodeStub {
- public:
-  explicit StringCompareStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
-
   // Compares two flat ASCII strings and returns result in eax.
   static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
-                                              Register left,
-                                              Register right,
+                                              Register left, Register right,
                                               Register scratch1,
                                               Register scratch2,
                                               Register scratch3);
 
-  // Compares two flat ASCII strings for equality and returns result
-  // in eax.
+  // Compares two flat ASCII strings for equality and returns result in eax.
   static void GenerateFlatAsciiStringEquals(MacroAssembler* masm,
                                             Register left,
                                             Register right,
@@ -95,10 +58,6 @@ class StringCompareStub: public PlatformCodeStub {
                                             Register scratch2);
 
  private:
-  virtual Major MajorKey() const { return StringCompare; }
-  virtual uint32_t MinorKey() const { return 0; }
-  virtual void Generate(MacroAssembler* masm);
-
   static void GenerateAsciiCharsCompareLoop(
       MacroAssembler* masm,
       Register left,
@@ -107,6 +66,8 @@ class StringCompareStub: public PlatformCodeStub {
       Register scratch,
       Label* chars_not_equal,
       Label::Distance chars_not_equal_near = Label::kFar);
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper);
 };