Add X32 port into V8

src/globals.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 61 matching lines @@
 // generates ARM machine code, together with a portable ARM simulator
 // compiled for the host architecture in question.
 //
 // Since Native Client is ILP-32 on all architectures we use
 // V8_HOST_ARCH_IA32 on both 32- and 64-bit x86.
 #define V8_HOST_ARCH_IA32 1
 #define V8_HOST_ARCH_32_BIT 1
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #else
 #define V8_HOST_ARCH_X64 1
+#if defined(__x86_64__) && !defined(__LP64__)
+#define V8_HOST_ARCH_32_BIT 1
+#else
 #define V8_HOST_ARCH_64_BIT 1
+#endif  // defined(__x86_64__) && !defined(__LP64__)
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #endif  // __native_client__
 #elif defined(_M_IX86) || defined(__i386__)
 #define V8_HOST_ARCH_IA32 1
 #define V8_HOST_ARCH_32_BIT 1
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #elif defined(__ARMEL__)
 #define V8_HOST_ARCH_ARM 1
 #define V8_HOST_ARCH_32_BIT 1
 // Some CPU-OS combinations allow unaligned access on ARM. We assume
 // that unaligned accesses are not allowed unless the build system
 // defines the CAN_USE_UNALIGNED_ACCESSES macro to be non-zero.
 #if CAN_USE_UNALIGNED_ACCESSES
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #endif
 #elif defined(__MIPSEL__)
 #define V8_HOST_ARCH_MIPS 1
 #define V8_HOST_ARCH_32_BIT 1
 #else
 #error Host architecture was not detected as supported by v8
 #endif
 
 // Target architecture detection. This may be set externally. If not, detect
 // in the same way as the host architecture, that is, target the native
 // environment as presented by the compiler.
-#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && \
-    !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS
+#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_ARM && \
+    !V8_TARGET_ARCH_MIPS && !V8_TARGET_ARCH_X32
 #if defined(_M_X64) || defined(__x86_64__)
 #define V8_TARGET_ARCH_X64 1
 #elif defined(_M_IX86) || defined(__i386__)
 #define V8_TARGET_ARCH_IA32 1
 #elif defined(__ARMEL__)
 #define V8_TARGET_ARCH_ARM 1
 #elif defined(__MIPSEL__)
 #define V8_TARGET_ARCH_MIPS 1
 #else
 #error Target architecture was not detected as supported by v8
 #endif
 #endif
 
 // Check for supported combinations of host and target architectures.
 #if V8_TARGET_ARCH_IA32 && !V8_HOST_ARCH_IA32
 #error Target architecture ia32 is only supported on ia32 host
 #endif
 #if V8_TARGET_ARCH_X64 && !V8_HOST_ARCH_X64
 #error Target architecture x64 is only supported on x64 host
 #endif
+#if (V8_TARGET_ARCH_X32 && !V8_HOST_ARCH_X64 && !V8_HOST_ARCH_32_BIT)
+#error Target architecture x32 is only supported on x64 host with x32 support
+#endif
 #if (V8_TARGET_ARCH_ARM && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_ARM))
 #error Target architecture arm is only supported on arm and ia32 host
 #endif
 #if (V8_TARGET_ARCH_MIPS && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_MIPS))
 #error Target architecture mips is only supported on mips and ia32 host
 #endif
 
 // Determine whether we are running in a simulated environment.
 // Setting USE_SIMULATOR explicitly from the build script will force
 // the use of a simulated environment.
 #if !defined(USE_SIMULATOR)
 #if (V8_TARGET_ARCH_ARM && !V8_HOST_ARCH_ARM)
 #define USE_SIMULATOR 1
 #endif
 #if (V8_TARGET_ARCH_MIPS && !V8_HOST_ARCH_MIPS)
 #define USE_SIMULATOR 1
 #endif
 #endif
 
 // Determine architecture endiannes (we only support little-endian).
 #if V8_TARGET_ARCH_IA32
 #define V8_TARGET_LITTLE_ENDIAN 1
 #elif V8_TARGET_ARCH_X64
 #define V8_TARGET_LITTLE_ENDIAN 1
+#elif V8_TARGET_ARCH_X32
+#define V8_TARGET_LITTLE_ENDIAN 1
 #elif V8_TARGET_ARCH_ARM
 #define V8_TARGET_LITTLE_ENDIAN 1
 #elif V8_TARGET_ARCH_MIPS
 #define V8_TARGET_LITTLE_ENDIAN 1
 #else
 #error Unknown target architecture endiannes
 #endif
 
 // Support for alternative bool type. This is only enabled if the code is
 // compiled with USE_MYBOOL defined. This catches some nasty type bugs.
@@ skipping 29 matching lines @@
 #define V8_INT64_C(x)   (x ## LL)
 #define V8_INTPTR_C(x)  (x ## LL)
 #define V8_PTR_PREFIX "I64"
 #else
 #define V8_UINT64_C(x)  (x ## UL)
 #define V8_INT64_C(x)   (x ## L)
 #define V8_INTPTR_C(x)  (x ## L)
 #define V8_PTR_PREFIX "l"
 #endif
 #else  // V8_HOST_ARCH_64_BIT
+#if V8_TARGET_ARCH_X32
+#define V8_UINT64_C(x)  (x ## ULL)
+#define V8_INT64_C(x)   (x ## LL)
+#endif
 #define V8_INTPTR_C(x)  (x)
 #define V8_PTR_PREFIX ""
 #endif  // V8_HOST_ARCH_64_BIT
 
 // The following macro works on both 32 and 64-bit platforms.
 // Usage: instead of writing 0x1234567890123456
 //      write V8_2PART_UINT64_C(0x12345678,90123456);
 #define V8_2PART_UINT64_C(a, b) (((static_cast<uint64_t>(a) << 32) + 0x##b##u))
 
 #define V8PRIxPTR V8_PTR_PREFIX "x"
@@ skipping 21 matching lines @@
 const int kMinInt = -kMaxInt - 1;
 
 const uint32_t kMaxUInt32 = 0xFFFFFFFFu;
 
 const int kCharSize     = sizeof(char);      // NOLINT
 const int kShortSize    = sizeof(short);     // NOLINT
 const int kIntSize      = sizeof(int);       // NOLINT
 const int kDoubleSize   = sizeof(double);    // NOLINT
 const int kIntptrSize   = sizeof(intptr_t);  // NOLINT
 const int kPointerSize  = sizeof(void*);     // NOLINT
+#if V8_TARGET_ARCH_X32
+const int kHWRegSize    = kPointerSize + kPointerSize;

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

You should define the following for all platforms (not just x32) and use them
consistently everywhere else:

kHardwareRegisterSize
kPCOnStackSize
kFPOnStackSize

+#endif
 
 const int kDoubleSizeLog2 = 3;
 
 // Size of the state of a the random number generator.
 const int kRandomStateSize = 2 * kIntSize;
 
-#if V8_HOST_ARCH_64_BIT
+#if V8_HOST_ARCH_64_BIT && !V8_TARGET_ARCH_X32
 const int kPointerSizeLog2 = 3;
 const intptr_t kIntptrSignBit = V8_INT64_C(0x8000000000000000);
 const uintptr_t kUintptrAllBitsSet = V8_UINT64_C(0xFFFFFFFFFFFFFFFF);
 #else
 const int kPointerSizeLog2 = 2;
 const intptr_t kIntptrSignBit = 0x80000000;
 const uintptr_t kUintptrAllBitsSet = 0xFFFFFFFFu;
 #endif
 
 const int kBitsPerByte = 8;
@@ skipping 168 matching lines @@
 // the backend, so both modes are represented by the kStrictMode value.
 enum StrictModeFlag {
   kNonStrictMode,
   kStrictMode
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_