pcsx2/common/include/Pcsx2Defs.h

/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2010  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __PCSX2DEFS_H__
#define __PCSX2DEFS_H__

// Indicate that this is the wx port to the plugins.
#define WX_PCSX2

#ifdef __CYGWIN__
#define __linux__
#endif

// make sure __POSIX__ is defined for all systems where we assume POSIX
// compliance
#if defined(__linux__) || defined(__APPLE__) || defined(__unix__) || defined(__CYGWIN__) || defined(__LINUX__)
#if !defined(__POSIX__)
#define __POSIX__ 1
#endif
#endif

#include "Pcsx2Types.h"

#include "x86emitter/x86_intrin.h"

// Renamed ARRAYSIZE to ArraySize -- looks nice and gets rid of Windows.h conflicts (air)
// Notes: I'd have used ARRAY_SIZE instead but ran into cross-platform lib conflicts with
// that as well.  >_<
#ifndef ArraySize
#define ArraySize(x) (sizeof(x) / sizeof((x)[0]))
#endif

// --------------------------------------------------------------------------------------
// Dev / Debug conditionals - Consts for using if() statements instead of uglier #ifdef.
// --------------------------------------------------------------------------------------
// Note: Using if() optimizes nicely in Devel and Release builds, but will generate extra
// code overhead in debug builds (since debug neither inlines, nor optimizes out const-
// level conditionals).  Normally not a concern, but if you stick if( IsDevbuild ) in
// some tight loops it will likely make debug builds unusably slow.
//
#ifdef __cplusplus
#ifdef PCSX2_DEVBUILD
static const bool IsDevBuild = true;
#else
static const bool IsDevBuild = false;
#endif

#ifdef PCSX2_DEBUG
static const bool IsDebugBuild = true;
#else
static const bool IsDebugBuild = false;
#endif

#else

#ifdef PCSX2_DEVBUILD
static const u8 IsDevBuild = 1;
#else
static const u8 IsDevBuild = 0;
#endif

#ifdef PCSX2_DEBUG
static const u8 IsDebugBuild = 1;
#else
static const u8 IsDebugBuild = 0;
#endif
#endif

#ifdef PCSX2_DEBUG
#define pxDebugCode(code) code
#else
#define pxDebugCode(code)
#endif

#ifdef PCSX2_DEVBUILD
#define pxDevelCode(code) code
#else
#define pxDevelCode(code)
#endif

#if defined(PCSX2_DEBUG) || defined(PCSX2_DEVBUILD)
#define pxReleaseCode(code)
#define pxNonReleaseCode(code) code
#else
#define pxReleaseCode(code) code
#define pxNonReleaseCode(code)
#endif

// --------------------------------------------------------------------------------------
// __aligned / __aligned16 / __pagealigned
// --------------------------------------------------------------------------------------
// GCC Warning!  The GCC linker (LD) typically fails to assure alignment of class members.
// If you want alignment to be assured, the variable must either be a member of a struct
// or a static global.
//
// __pagealigned is equivalent to __aligned(0x1000), and is used to align a dynarec code
// buffer to a page boundary (allows the use of execution-enabled mprotect).
//
// General Performance Warning: Any function that specifies alignment on a local (stack)
// variable will have to align the stack frame on enter, and restore it on exit (adds
// overhead).  Furthermore, compilers cannot inline functions that have aligned local
// vars.  So use local var alignment with much caution.
//

// Defines the memory page size for the target platform at compilation.  All supported platforms
// (which means Intel only right now) have a 4k granularity.
#define PCSX2_PAGESIZE 0x1000
static const int __pagesize = PCSX2_PAGESIZE;

// --------------------------------------------------------------------------------------
// Structure Packing (__packed)
// --------------------------------------------------------------------------------------
// Current Method:
// Use a combination of embedded compiler-specific #pragma mess in conjunction with a
// __packed macro.  The former appeases the MSVC gods, the latter appeases the GCC gods.
// The end result looks something like this:
//
// #ifdef _MSC_VER
// #   pragma pack(1)
// #endif
//
// struct SomeKindaFail {
//     u8   neat;
//     u32  unaligned32;
// } __packed;
//
// MSVC 2008 and better support __pragma, however there's no way to support that in
// a way that's backwards compatible to VS 2005, without still including the old-style
// #pragma mess.  So there's really not much point (yet) in using it.  I've included macros
// that utilize __pragma (commented out below) which can be deployed at a time when we
// are ok with the idea of completely breaking backwards compat with VC2005/prior.
//

// --------------------------------------------------------------------------------------
//  Microsoft Visual Studio
// --------------------------------------------------------------------------------------
#ifdef _MSC_VER

// Using these breaks compat with VC2005; so we're not using it yet.
//#	define __pack_begin		__pragma(pack(1))
//#	define __pack_end		__pragma(pack())

// This is the 2005/earlier compatible packing define, which must be used in conjunction
// with #ifdef _MSC_VER/#pragma pack() directives (ugly).
#define __packed

#define __aligned(alig) __declspec(align(alig))
#define __aligned16 __declspec(align(16))
#define __aligned32 __declspec(align(32))
#define __pagealigned __declspec(align(PCSX2_PAGESIZE))

// Deprecated; use __align instead.
#define PCSX2_ALIGNED(alig, x) __declspec(align(alig)) x
#define PCSX2_ALIGNED_EXTERN(alig, x) extern __declspec(align(alig)) x
#define PCSX2_ALIGNED16(x) __declspec(align(16)) x
#define PCSX2_ALIGNED16_EXTERN(x) extern __declspec(align(16)) x

#define __noinline __declspec(noinline)

// Don't know if there are Visual C++ equivalents of these.
#define likely(x) (!!(x))
#define unlikely(x) (!!(x))

#define CALLBACK __stdcall

#else

// --------------------------------------------------------------------------------------
//  GCC / Intel Compilers Section
// --------------------------------------------------------------------------------------

#ifndef __packed
#define __packed __attribute__((packed))
#endif
#ifndef __aligned
#define __aligned(alig) __attribute__((aligned(alig)))
#endif
#define __aligned16 __attribute__((aligned(16)))
#define __aligned32 __attribute__((aligned(32)))
#define __pagealigned __attribute__((aligned(PCSX2_PAGESIZE)))
// Deprecated; use __align instead.
#define PCSX2_ALIGNED(alig, x) x __attribute((aligned(alig)))
#define PCSX2_ALIGNED16(x) x __attribute((aligned(16)))
#define PCSX2_ALIGNED_EXTERN(alig, x) extern x __attribute((aligned(alig)))
#define PCSX2_ALIGNED16_EXTERN(x) extern x __attribute((aligned(16)))

#define __assume(cond) ((void)0) // GCC has no equivalent for __assume
#define CALLBACK __attribute__((stdcall))

// Inlining note: GCC needs ((unused)) attributes defined on inlined functions to suppress
// warnings when a static inlined function isn't used in the scope of a single file (which
// happens *by design* like all the friggen time >_<)

#ifndef __fastcall
#define __fastcall __attribute__((fastcall))
#endif
#define _inline __inline__ __attribute__((unused))
#ifdef NDEBUG
#define __forceinline __attribute__((always_inline, unused))
#else
#define __forceinline __attribute__((unused))
#endif
#ifndef __noinline
#define __noinline __attribute__((noinline))
#endif
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#endif

// --------------------------------------------------------------------------------------
// __releaseinline / __ri -- a forceinline macro that is enabled for RELEASE/PUBLIC builds ONLY.
// --------------------------------------------------------------------------------------
// This is useful because forceinline can make certain types of debugging problematic since
// functions that look like they should be called won't breakpoint since their code is
// inlined, and it can make stack traces confusing or near useless.
//
// Use __releaseinline for things which are generally large functions where trace debugging
// from Devel builds is likely useful; but which should be inlined in an optimized Release
// environment.
//
#ifdef PCSX2_DEVBUILD
#define __releaseinline
#else
#define __releaseinline __forceinline
#endif

#define __ri __releaseinline
#define __fi __forceinline
#define __fc __fastcall

#endif

#if defined(__x86_64__) || defined(_M_AMD64)
#define __M_X86_64
#endif