S390: Initial impl of regexp

src/regexp/s390/regexp-macro-assembler-s390.h

-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2015 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.
 
-#ifndef V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
-#define V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
+#ifndef V8_S390_REGEXP_MACRO_ASSEMBLER_S390_H_
+#define V8_S390_REGEXP_MACRO_ASSEMBLER_S390_H_
 
 #include "src/macro-assembler.h"
-#include "src/ppc/assembler-ppc.h"
-#include "src/ppc/frames-ppc.h"
 #include "src/regexp/regexp-macro-assembler.h"
+#include "src/s390/assembler-s390.h"
+#include "src/s390/frames-s390.h"
 
 namespace v8 {
 namespace internal {
 
-
 #ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerPPC : public NativeRegExpMacroAssembler {
+class RegExpMacroAssemblerS390 : public NativeRegExpMacroAssembler {
  public:
-  RegExpMacroAssemblerPPC(Isolate* isolate, Zone* zone, Mode mode,
-                          int registers_to_save);
-  virtual ~RegExpMacroAssemblerPPC();
+  RegExpMacroAssemblerS390(Isolate* isolate, Zone* zone, Mode mode,
+                           int registers_to_save);
+  virtual ~RegExpMacroAssemblerS390();
   virtual int stack_limit_slack();
   virtual void AdvanceCurrentPosition(int by);
   virtual void AdvanceRegister(int reg, int by);
   virtual void Backtrack();
   virtual void Bind(Label* label);
   virtual void CheckAtStart(Label* on_at_start);
   virtual void CheckCharacter(unsigned c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(unsigned c, unsigned mask,
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
@@ skipping 51 matching lines @@
   // If the code object is relocated, the return address is fixed before
   // returning.
   static int CheckStackGuardState(Address* return_address, Code* re_code,
                                   Address re_frame);
 
  private:
   // Offsets from frame_pointer() of function parameters and stored registers.
   static const int kFramePointer = 0;
 
   // Above the frame pointer - Stored registers and stack passed parameters.
-  // Register 25..31.
+  // Register 6-15(sp)
   static const int kStoredRegisters = kFramePointer;
-  // Return address (stored from link register, read into pc on return).
-  static const int kReturnAddress = kStoredRegisters + 7 * kPointerSize;
-  static const int kCallerFrame = kReturnAddress + kPointerSize;
+  static const int kCallerFrame =
+      kStoredRegisters + kCalleeRegisterSaveAreaSize;
   // Stack parameters placed by caller.
-  static const int kSecondaryReturnAddress =
-      kCallerFrame + kStackFrameExtraParamSlot * kPointerSize;
+  static const int kCaptureArraySize = kCallerFrame;
+  static const int kStackAreaBase = kCallerFrame + kPointerSize;
+  // kDirectCall again
+  static const int kSecondaryReturnAddress = kStackAreaBase + 2 * kPointerSize;
   static const int kIsolate = kSecondaryReturnAddress + kPointerSize;
 
   // Below the frame pointer.
   // Register parameters stored by setup code.
   static const int kDirectCall = kFramePointer - kPointerSize;
   static const int kStackHighEnd = kDirectCall - kPointerSize;
   static const int kNumOutputRegisters = kStackHighEnd - kPointerSize;
   static const int kRegisterOutput = kNumOutputRegisters - kPointerSize;
   static const int kInputEnd = kRegisterOutput - kPointerSize;
   static const int kInputStart = kInputEnd - kPointerSize;
@@ skipping 11 matching lines @@
 
   // Load a number of characters at the given offset from the
   // current position, into the current-character register.
   void LoadCurrentCharacterUnchecked(int cp_offset, int character_count);
 
   // Check whether preemption has been requested.
   void CheckPreemption();
 
   // Check whether we are exceeding the stack limit on the backtrack stack.
   void CheckStackLimit();
-
+  void CallCFunctionUsingStub(ExternalReference function, int num_arguments);
 
   // Generate a call to CheckStackGuardState.
   void CallCheckStackGuardState(Register scratch);
 
   // The ebp-relative location of a regexp register.
   MemOperand register_location(int register_index);
 
   // Register holding the current input position as negative offset from
   // the end of the string.
-  inline Register current_input_offset() { return r27; }
+  inline Register current_input_offset() { return r8; }
 
   // The register containing the current character after LoadCurrentCharacter.
-  inline Register current_character() { return r28; }
+  inline Register current_character() { return r9; }
 
   // Register holding address of the end of the input string.
-  inline Register end_of_input_address() { return r30; }
+  inline Register end_of_input_address() { return r10; }
 
   // Register holding the frame address. Local variables, parameters and
   // regexp registers are addressed relative to this.
   inline Register frame_pointer() { return fp; }
 
   // The register containing the backtrack stack top. Provides a meaningful
   // name to the register.
-  inline Register backtrack_stackpointer() { return r29; }
+  inline Register backtrack_stackpointer() { return r13; }
 
   // Register holding pointer to the current code object.
-  inline Register code_pointer() { return r26; }
+  inline Register code_pointer() { return r7; }
 
   // Byte size of chars in the string to match (decided by the Mode argument)
   inline int char_size() { return static_cast<int>(mode_); }
 
   // Equivalent to a conditional branch to the label, unless the label
   // is NULL, in which case it is a conditional Backtrack.
   void BranchOrBacktrack(Condition condition, Label* to, CRegister cr = cr7);
 
   // Call and return internally in the generated code in a way that
   // is GC-safe (i.e., doesn't leave absolute code addresses on the stack)
@@ skipping 29 matching lines @@
   Label success_label_;
   Label backtrack_label_;
   Label exit_label_;
   Label check_preempt_label_;
   Label stack_overflow_label_;
   Label internal_failure_label_;
 };
 
 // Set of non-volatile registers saved/restored by generated regexp code.
 const RegList kRegExpCalleeSaved =
-    1 << 25 | 1 << 26 | 1 << 27 | 1 << 28 | 1 << 29 | 1 << 30 | 1 << 31;
+    1 << 6 | 1 << 7 | 1 << 8 | 1 << 9 | 1 << 10 | 1 << 11 | 1 << 13;
 
 #endif  // V8_INTERPRETED_REGEXP
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
+#endif  // V8_S390_REGEXP_MACRO_ASSEMBLER_S390_H_