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Diffstat (limited to 'src/3rdparty/v8/src/globals.h')
| -rw-r--r-- | src/3rdparty/v8/src/globals.h | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/globals.h b/src/3rdparty/v8/src/globals.h new file mode 100644 index 0000000..5ab9806 --- /dev/null +++ b/src/3rdparty/v8/src/globals.h @@ -0,0 +1,325 @@ +// Copyright 2010 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 +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef V8_GLOBALS_H_ +#define V8_GLOBALS_H_ + +#include "../include/v8stdint.h" + +namespace v8 { +namespace internal { + +// Processor architecture detection. For more info on what's defined, see: +// http://msdn.microsoft.com/en-us/library/b0084kay.aspx +// http://www.agner.org/optimize/calling_conventions.pdf +// or with gcc, run: "echo | gcc -E -dM -" +#if defined(_M_X64) || defined(__x86_64__) +#define V8_HOST_ARCH_X64 1 +#define V8_HOST_ARCH_64_BIT 1 +#define V8_HOST_CAN_READ_UNALIGNED 1 +#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 !defined(V8_TARGET_ARCH_X64) && !defined(V8_TARGET_ARCH_IA32) && \ + !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS) +#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 defined(V8_TARGET_ARCH_IA32) && !defined(V8_HOST_ARCH_IA32) +#error Target architecture ia32 is only supported on ia32 host +#endif +#if defined(V8_TARGET_ARCH_X64) && !defined(V8_HOST_ARCH_X64) +#error Target architecture x64 is only supported on x64 host +#endif +#if (defined(V8_TARGET_ARCH_ARM) && \ + !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_ARM))) +#error Target architecture arm is only supported on arm and ia32 host +#endif +#if (defined(V8_TARGET_ARCH_MIPS) && \ + !(defined(V8_HOST_ARCH_IA32) || defined(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 (defined(V8_TARGET_ARCH_ARM) && !defined(V8_HOST_ARCH_ARM)) +#define USE_SIMULATOR 1 +#endif +#if (defined(V8_TARGET_ARCH_MIPS) && !defined(V8_HOST_ARCH_MIPS)) +#define USE_SIMULATOR 1 +#endif +#endif + +// Define unaligned read for the target architectures supporting it. +#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_IA32) +#define V8_TARGET_CAN_READ_UNALIGNED 1 +#elif V8_TARGET_ARCH_ARM +// 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_TARGET_CAN_READ_UNALIGNED 1 +#endif +#elif V8_TARGET_ARCH_MIPS +#else +#error Target architecture is not supported by v8 +#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. +// For instance, 'bool b = "false";' results in b == true! This is a hidden +// source of bugs. +// However, redefining the bool type does have some negative impact on some +// platforms. It gives rise to compiler warnings (i.e. with +// MSVC) in the API header files when mixing code that uses the standard +// bool with code that uses the redefined version. +// This does not actually belong in the platform code, but needs to be +// defined here because the platform code uses bool, and platform.h is +// include very early in the main include file. + +#ifdef USE_MYBOOL +typedef unsigned int __my_bool__; +#define bool __my_bool__ // use 'indirection' to avoid name clashes +#endif + +typedef uint8_t byte; +typedef byte* Address; + +// Define our own macros for writing 64-bit constants. This is less fragile +// than defining __STDC_CONSTANT_MACROS before including <stdint.h>, and it +// works on compilers that don't have it (like MSVC). +#if V8_HOST_ARCH_64_BIT +#ifdef _MSC_VER +#define V8_UINT64_C(x) (x ## UI64) +#define V8_INT64_C(x) (x ## I64) +#define V8_INTPTR_C(x) (x ## I64) +#define V8_PTR_PREFIX "ll" +#else // _MSC_VER +#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 // _MSC_VER +#else // V8_HOST_ARCH_64_BIT +#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" +#define V8PRIdPTR V8_PTR_PREFIX "d" + +// Fix for Mac OS X defining uintptr_t as "unsigned long": +#if defined(__APPLE__) && defined(__MACH__) +#undef V8PRIxPTR +#define V8PRIxPTR "lx" +#endif + +#if (defined(__APPLE__) && defined(__MACH__)) || \ + defined(__FreeBSD__) || defined(__OpenBSD__) +#define USING_BSD_ABI +#endif + +// ----------------------------------------------------------------------------- +// Constants + +const int KB = 1024; +const int MB = KB * KB; +const int GB = KB * KB * KB; +const int kMaxInt = 0x7FFFFFFF; +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_HOST_ARCH_64_BIT +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; +const int kBitsPerByteLog2 = 3; +const int kBitsPerPointer = kPointerSize * kBitsPerByte; +const int kBitsPerInt = kIntSize * kBitsPerByte; + +// IEEE 754 single precision floating point number bit layout. +const uint32_t kBinary32SignMask = 0x80000000u; +const uint32_t kBinary32ExponentMask = 0x7f800000u; +const uint32_t kBinary32MantissaMask = 0x007fffffu; +const int kBinary32ExponentBias = 127; +const int kBinary32MaxExponent = 0xFE; +const int kBinary32MinExponent = 0x01; +const int kBinary32MantissaBits = 23; +const int kBinary32ExponentShift = 23; + +// ASCII/UC16 constants +// Code-point values in Unicode 4.0 are 21 bits wide. +typedef uint16_t uc16; +typedef int32_t uc32; +const int kASCIISize = kCharSize; +const int kUC16Size = sizeof(uc16); // NOLINT +const uc32 kMaxAsciiCharCode = 0x7f; +const uint32_t kMaxAsciiCharCodeU = 0x7fu; + + +// The expression OFFSET_OF(type, field) computes the byte-offset +// of the specified field relative to the containing type. This +// corresponds to 'offsetof' (in stddef.h), except that it doesn't +// use 0 or NULL, which causes a problem with the compiler warnings +// we have enabled (which is also why 'offsetof' doesn't seem to work). +// Here we simply use the non-zero value 4, which seems to work. +#define OFFSET_OF(type, field) \ + (reinterpret_cast<intptr_t>(&(reinterpret_cast<type*>(4)->field)) - 4) + + +// The expression ARRAY_SIZE(a) is a compile-time constant of type +// size_t which represents the number of elements of the given +// array. You should only use ARRAY_SIZE on statically allocated +// arrays. +#define ARRAY_SIZE(a) \ + ((sizeof(a) / sizeof(*(a))) / \ + static_cast<size_t>(!(sizeof(a) % sizeof(*(a))))) + + +// The USE(x) template is used to silence C++ compiler warnings +// issued for (yet) unused variables (typically parameters). +template <typename T> +static inline void USE(T) { } + + +// FUNCTION_ADDR(f) gets the address of a C function f. +#define FUNCTION_ADDR(f) \ + (reinterpret_cast<v8::internal::Address>(reinterpret_cast<intptr_t>(f))) + + +// FUNCTION_CAST<F>(addr) casts an address into a function +// of type F. Used to invoke generated code from within C. +template <typename F> +F FUNCTION_CAST(Address addr) { + return reinterpret_cast<F>(reinterpret_cast<intptr_t>(addr)); +} + + +// A macro to disallow the evil copy constructor and operator= functions +// This should be used in the private: declarations for a class +#define DISALLOW_COPY_AND_ASSIGN(TypeName) \ + TypeName(const TypeName&); \ + void operator=(const TypeName&) + + +// A macro to disallow all the implicit constructors, namely the +// default constructor, copy constructor and operator= functions. +// +// This should be used in the private: declarations for a class +// that wants to prevent anyone from instantiating it. This is +// especially useful for classes containing only static methods. +#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \ + TypeName(); \ + DISALLOW_COPY_AND_ASSIGN(TypeName) + + +// Define used for helping GCC to make better inlining. Don't bother for debug +// builds. On GCC 3.4.5 using __attribute__((always_inline)) causes compilation +// errors in debug build. +#if defined(__GNUC__) && !defined(DEBUG) +#if (__GNUC__ >= 4) +#define INLINE(header) inline header __attribute__((always_inline)) +#define NO_INLINE(header) header __attribute__((noinline)) +#else +#define INLINE(header) inline __attribute__((always_inline)) header +#define NO_INLINE(header) __attribute__((noinline)) header +#endif +#else +#define INLINE(header) inline header +#define NO_INLINE(header) header +#endif + + +#if defined(__GNUC__) && __GNUC__ >= 4 +#define MUST_USE_RESULT __attribute__ ((warn_unused_result)) +#else +#define MUST_USE_RESULT +#endif + +// ----------------------------------------------------------------------------- +// Forward declarations for frequently used classes +// (sorted alphabetically) + +class FreeStoreAllocationPolicy; +template <typename T, class P = FreeStoreAllocationPolicy> class List; + +} } // namespace v8::internal + +#endif // V8_GLOBALS_H_ |