Add X32 port into V8

src/x64/regexp-macro-assembler-x64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 117 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 rbp of function parameters and stored registers.
   static const int kFramePointer = 0;
   // Above the frame pointer - function parameters and return address.
+#ifndef V8_TARGET_ARCH_X32
   static const int kReturn_eip = kFramePointer + kPointerSize;
   static const int kFrameAlign = kReturn_eip + kPointerSize;
+#else
+  static const int kReturn_eip = kFramePointer + kHWRegSize;
+  static const int kFrameAlign = kReturn_eip + kHWRegSize;
+#endif
 
 #ifdef _WIN64
   // Parameters (first four passed as registers, but with room on stack).
   // In Microsoft 64-bit Calling Convention, there is room on the callers
   // stack (before the return address) to spill parameter registers. We
   // use this space to store the register passed parameters.
   static const int kInputString = kFrameAlign;
   // StartIndex is passed as 32 bit int.
   static const int kStartIndex = kInputString + kPointerSize;
   static const int kInputStart = kStartIndex + kPointerSize;
   static const int kInputEnd = kInputStart + kPointerSize;
   static const int kRegisterOutput = kInputEnd + kPointerSize;
   // For the case of global regular expression, we have room to store at least
   // one set of capture results.  For the case of non-global regexp, we ignore
   // this value. NumOutputRegisters is passed as 32-bit value.  The upper
   // 32 bit of this 64-bit stack slot may contain garbage.
   static const int kNumOutputRegisters = kRegisterOutput + kPointerSize;
   static const int kStackHighEnd = kNumOutputRegisters + kPointerSize;
   // DirectCall is passed as 32 bit int (values 0 or 1).
   static const int kDirectCall = kStackHighEnd + kPointerSize;
   static const int kIsolate = kDirectCall + kPointerSize;
 #else
   // In AMD64 ABI Calling Convention, the first six integer parameters
   // are passed as registers, and caller must allocate space on the stack
   // if it wants them stored. We push the parameters after the frame pointer.
+#ifndef V8_TARGET_ARCH_X32
   static const int kInputString = kFramePointer - kPointerSize;
   static const int kStartIndex = kInputString - kPointerSize;
   static const int kInputStart = kStartIndex - kPointerSize;
   static const int kInputEnd = kInputStart - kPointerSize;
   static const int kRegisterOutput = kInputEnd - kPointerSize;
+#else
+  static const int kInputString = kFramePointer - kHWRegSize;
+  static const int kStartIndex = kInputString - kHWRegSize;
+  static const int kInputStart = kStartIndex - kHWRegSize;
+  static const int kInputEnd = kInputStart - kHWRegSize;
+  static const int kRegisterOutput = kInputEnd - kHWRegSize;
+#endif
   // For the case of global regular expression, we have room to store at least
   // one set of capture results.  For the case of non-global regexp, we ignore
   // this value.
+#ifndef V8_TARGET_ARCH_X32
   static const int kNumOutputRegisters = kRegisterOutput - kPointerSize;
   static const int kStackHighEnd = kFrameAlign;
   static const int kDirectCall = kStackHighEnd + kPointerSize;
   static const int kIsolate = kDirectCall + kPointerSize;
+#else
+  static const int kNumOutputRegisters = kRegisterOutput - kHWRegSize;
+  static const int kStackHighEnd = kFrameAlign;
+  static const int kDirectCall = kStackHighEnd + kHWRegSize;
+  static const int kIsolate = kDirectCall + kHWRegSize;
+#endif
 #endif
 
 #ifdef _WIN64
   // Microsoft calling convention has three callee-saved registers
   // (that we are using). We push these after the frame pointer.
   static const int kBackup_rsi = kFramePointer - kPointerSize;
   static const int kBackup_rdi = kBackup_rsi - kPointerSize;
   static const int kBackup_rbx = kBackup_rdi - kPointerSize;
   static const int kLastCalleeSaveRegister = kBackup_rbx;
 #else
   // AMD64 Calling Convention has only one callee-save register that
   // we use. We push this after the frame pointer (and after the
   // parameters).
+#ifndef V8_TARGET_ARCH_X32
   static const int kBackup_rbx = kNumOutputRegisters - kPointerSize;
+#else
+  static const int kBackup_rbx = kNumOutputRegisters - kHWRegSize;
+#endif
   static const int kLastCalleeSaveRegister = kBackup_rbx;
 #endif
 
   static const int kSuccessfulCaptures = kLastCalleeSaveRegister - kPointerSize;
   // When adding local variables remember to push space for them in
   // the frame in GetCode.
   static const int kInputStartMinusOne = kSuccessfulCaptures - kPointerSize;
 
   // First register address. Following registers are below it on the stack.
   static const int kRegisterZero = kInputStartMinusOne - kPointerSize;
@@ skipping 92 matching lines @@
   Label exit_label_;
   Label check_preempt_label_;
   Label stack_overflow_label_;
 };
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_