/*
 * Mesa 3-D graphics library
 *
 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
 * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */


/**
 * \file compiler.h
 * Compiler-related stuff.
 */


#ifndef COMPILER_H
#define COMPILER_H


#include <assert.h>

#include "util/macros.h"

#include "c99_compat.h" /* inline, __func__, etc. */


#ifdef __cplusplus
extern "C" {
#endif


/**
  * Sun compilers define __i386 instead of the gcc-style __i386__
 */
#ifdef __SUNPRO_C
# if !defined(__i386__) && defined(__i386)
#  define __i386__
# elif !defined(__amd64__) && defined(__amd64)
#  define __amd64__
# elif !defined(__sparc__) && defined(__sparc)
#  define __sparc__
# endif
# if !defined(__volatile)
#  define __volatile volatile
# endif
#endif


/**
 * finite macro.
 */
#if defined(_MSC_VER)
#  define finite _finite
#endif


/**
 * Disable assorted warnings
 */
#if defined(_WIN32) && !defined(__CYGWIN__)
#  if !defined(__GNUC__) /* mingw environment */
#    pragma warning( disable : 4068 ) /* unknown pragma */
#    pragma warning( disable : 4710 ) /* function 'foo' not inlined */
#    pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
#    pragma warning( disable : 4127 ) /* conditional expression is constant */
#    if defined(MESA_MINWARN)
#      pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
#      pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
#      pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
#      pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
#      pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
#    endif
#  endif
#endif


/**
 * PUBLIC/USED macros
 *
 * If we build the library with gcc's -fvisibility=hidden flag, we'll
 * use the PUBLIC macro to mark functions that are to be exported.
 *
 * We also need to define a USED attribute, so the optimizer doesn't 
 * inline a static function that we later use in an alias. - ajax
 */
#ifndef PUBLIC
#  if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
#    define PUBLIC __attribute__((visibility("default")))
#    define USED __attribute__((used))
#  else
#    define PUBLIC
#    define USED
#  endif
#endif


/* XXX: Use standard `__func__` instead */
#ifndef __FUNCTION__
#  define __FUNCTION__ __func__
#endif

/**
 * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32.
 * Do not use these unless absolutely necessary!
 * Try to use a runtime test instead.
 * For now, only used by some DRI hardware drivers for color/texel packing.
 */
#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
#if defined(__linux__)
#include <byteswap.h>
#define CPU_TO_LE32( x )	bswap_32( x )
#elif defined(__APPLE__)
#include <CoreFoundation/CFByteOrder.h>
#define CPU_TO_LE32( x )	CFSwapInt32HostToLittle( x )
#elif (defined(_AIX))
static inline GLuint CPU_TO_LE32(GLuint x)
{
   return (((x & 0x000000ff) << 24) |
           ((x & 0x0000ff00) <<  8) |
           ((x & 0x00ff0000) >>  8) |
           ((x & 0xff000000) >> 24));
}
#elif defined(__OpenBSD__)
#include <sys/types.h>
#define CPU_TO_LE32( x )	htole32( x )
#else /*__linux__ */
#include <sys/endian.h>
#define CPU_TO_LE32( x )	bswap32( x )
#endif /*__linux__*/
#define MESA_BIG_ENDIAN 1
#else
#define CPU_TO_LE32( x )	( x )
#define MESA_LITTLE_ENDIAN 1
#endif
#define LE32_TO_CPU( x )	CPU_TO_LE32( x )



/**
 * Create a macro so that asm functions can be linked into compilers other
 * than GNU C
 */
#ifndef _ASMAPI
#if defined(_WIN32)
#define _ASMAPI __cdecl
#else
#define _ASMAPI
#endif
#ifdef	PTR_DECL_IN_FRONT
#define	_ASMAPIP * _ASMAPI
#else
#define	_ASMAPIP _ASMAPI *
#endif
#endif

#ifdef USE_X86_ASM
#define _NORMAPI _ASMAPI
#define _NORMAPIP _ASMAPIP
#else
#define _NORMAPI
#define _NORMAPIP *
#endif


/*
 * A trick to suppress uninitialized variable warning without generating any
 * code
 */
#define uninitialized_var(x) x = x


/**
 * LONGSTRING macro
 * gcc -pedantic warns about long string literals, LONGSTRING silences that.
 */
#if !defined(__GNUC__)
# define LONGSTRING
#else
# define LONGSTRING __extension__
#endif

#ifndef ONE_DIV_SQRT_LN2
#define ONE_DIV_SQRT_LN2 (1.201122408786449815)
#endif

#ifndef FLT_MAX_EXP
#define FLT_MAX_EXP 128
#endif

#define IEEE_ONE 0x3f800000

#ifndef Elements
#define Elements(x) (sizeof(x)/sizeof(*(x)))
#endif

#ifdef __cplusplus
}
#endif


#endif /* COMPILER_H */