Add X32 port into V8

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
===================================================================
--- src/x64/assembler-x64.h	(revision 15486)
+++ src/x64/assembler-x64.h	(working copy)
@@ -378,6 +378,11 @@
 class Immediate BASE_EMBEDDED {
  public:
   explicit Immediate(int32_t value) : value_(value) {}
+#ifdef V8_TARGET_ARCH_X32
+  explicit Immediate(Smi* value) {
+    value_ = reinterpret_cast<intptr_t>(value);
+  }
+#endif
 
  private:
   int32_t value_;
@@ -395,7 +400,11 @@
   times_4 = 2,
   times_8 = 3,
   times_int_size = times_4,
+#ifndef V8_TARGET_ARCH_X32
   times_pointer_size = times_8

[danno, 2013/07/17 13:33:21]

Make this cross platform with:
times_pointer_size = (kPointerSize == 8) ? times_8 : times_4;

+#else
+  times_pointer_size = times_4
+#endif
 };
 
 
@@ -583,20 +592,33 @@
   // 32-bit displacement of a near call would be, relative to the pushed
   // return address.  TODO: Use return sequence length instead.
   // Should equal Debug::kX64JSReturnSequenceLength - kCallTargetAddressOffset;
+#ifndef V8_TARGET_ARCH_X32
   static const int kPatchReturnSequenceAddressOffset = 13 - 4;
+#else
+  static const int kPatchReturnSequenceAddressOffset = 9 - 4;

[danno, 2013/07/17 13:33:21]

In these constants and below, you can use kRegisterSize or other constants to
avoid the #ifdefs

+#endif
   // Distance between start of patched debug break slot and where the
   // 32-bit displacement of a near call would be, relative to the pushed
   // return address.  TODO: Use return sequence length instead.
   // Should equal Debug::kX64JSReturnSequenceLength - kCallTargetAddressOffset;
+#ifndef V8_TARGET_ARCH_X32
   static const int kPatchDebugBreakSlotAddressOffset = 13 - 4;
+#else
+  static const int kPatchDebugBreakSlotAddressOffset = 9 - 4;
+#endif
   // TODO(X64): Rename this, removing the "Real", after changing the above.
   static const int kRealPatchReturnSequenceAddressOffset = 2;
 
   // Some x64 JS code is padded with int3 to make it large
   // enough to hold an instruction when the debugger patches it.
   static const int kJumpInstructionLength = 13;
+#ifndef V8_TARGET_ARCH_X32
   static const int kCallInstructionLength = 13;
   static const int kJSReturnSequenceLength = 13;
+#else
+  static const int kCallInstructionLength = 9;
+  static const int kJSReturnSequenceLength = 9;
+#endif
   static const int kShortCallInstructionLength = 5;
   static const int kPatchDebugBreakSlotReturnOffset = 4;
 
@@ -688,17 +710,27 @@
   // Move the offset of the label location relative to the current
   // position (after the move) to the destination.
   void movl(const Operand& dst, Label* src);
+#ifdef V8_TARGET_ARCH_X32
+  void movl(Register dst, int32_t value, RelocInfo::Mode rmode);
+#endif
 
   // Move sign extended immediate to memory location.
   void movq(const Operand& dst, Immediate value);
   // Instructions to load a 64-bit immediate into a register.
   // All 64-bit immediates must have a relocation mode.
+  void movq(Register dst, int64_t value, RelocInfo::Mode rmode);
+#ifndef V8_TARGET_ARCH_X32
   void movq(Register dst, void* ptr, RelocInfo::Mode rmode);
-  void movq(Register dst, int64_t value, RelocInfo::Mode rmode);
   void movq(Register dst, const char* s, RelocInfo::Mode rmode);
   // Moves the address of the external reference into the register.
   void movq(Register dst, ExternalReference ext);
   void movq(Register dst, Handle<Object> handle, RelocInfo::Mode rmode);
+#else
+  void movl(Register dst, void* ptr, RelocInfo::Mode rmode);
+  void movl(Register dst, const char* s, RelocInfo::Mode rmode);
+  void movl(Register dst, ExternalReference ext);
+  void movl(Register dst, Handle<Object> handle, RelocInfo::Mode rmode);
+#endif
 
   void movsxbq(Register dst, const Operand& src);
   void movsxwq(Register dst, const Operand& src);
@@ -729,6 +761,9 @@
 
   // Exchange two registers
   void xchg(Register dst, Register src);
+#ifdef V8_TARGET_ARCH_X32
+  void xchgl(Register dst, Register src);
+#endif
 
   // Arithmetics
   void addl(Register dst, Register src) {
@@ -963,6 +998,12 @@
     arithmetic_op(0x09, src, dst);
   }
 
+#ifdef V8_TARGET_ARCH_X32
+  void orl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x09, src, dst);
+  }
+#endif
+
   void or_(Register dst, Immediate src) {
     immediate_arithmetic_op(0x1, dst, src);
   }
@@ -979,7 +1020,6 @@
     immediate_arithmetic_op_32(0x1, dst, src);
   }
 
-
   void rcl(Register dst, Immediate imm8) {
     shift(dst, imm8, 0x2);
   }
@@ -988,6 +1028,12 @@
     shift(dst, imm8, 0x0);
   }
 
+#ifdef V8_TARGET_ARCH_X32
+  void roll(Register dst, Immediate imm8) {
+    shift_32(dst, imm8, 0x0);
+  }
+#endif
+
   void rcr(Register dst, Immediate imm8) {
     shift(dst, imm8, 0x3);
   }
@@ -1095,6 +1141,12 @@
     arithmetic_op_32(0x2B, dst, src);
   }
 
+#ifdef V8_TARGET_ARCH_X32
+  void subl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x29, src, dst);
+  }
+#endif
+
   void subl(const Operand& dst, Immediate src) {
     immediate_arithmetic_op_32(0x5, dst, src);
   }
@@ -1114,6 +1166,9 @@
   void testl(Register dst, Register src);
   void testl(Register reg, Immediate mask);
   void testl(const Operand& op, Immediate mask);
+#ifdef V8_TARGET_ARCH_X32
+  void testl(const Operand& op, Register reg);
+#endif
   void testq(const Operand& op, Register reg);
   void testq(Register dst, Register src);
   void testq(Register dst, Immediate mask);
@@ -1138,6 +1193,12 @@
     immediate_arithmetic_op_32(0x6, dst, src);
   }
 
+#ifdef V8_TARGET_ARCH_X32
+  void xorl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x31, src, dst);
+  }
+#endif
+
   void xorl(const Operand& dst, Immediate src) {
     immediate_arithmetic_op_32(0x6, dst, src);
   }
@@ -1378,6 +1439,9 @@
 
   void movmskpd(Register dst, XMMRegister src);
   void movmskps(Register dst, XMMRegister src);
+#ifdef V8_TARGET_ARCH_X32
+  void pcmpeqd(XMMRegister dst, XMMRegister src);
+#endif
 
   // The first argument is the reg field, the second argument is the r/m field.
   void emit_sse_operand(XMMRegister dst, XMMRegister src);
@@ -1444,6 +1508,9 @@
 
   void emit(byte x) { *pc_++ = x; }
   inline void emitl(uint32_t x);
+#ifdef V8_TARGET_ARCH_X32
+  inline void emitl(uint32_t x, RelocInfo::Mode rmode);
+#endif
   inline void emitq(uint64_t x, RelocInfo::Mode rmode);
   inline void emitw(uint16_t x);
   inline void emit_code_target(Handle<Code> target,