/*
* Mesa 3-D graphics library
* Version: 7.5
*
* 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
* BRIAN PAUL 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 <ctype.h>
#if defined(__alpha__) && defined(CCPML)
#include <cpml.h> /* use Compaq's Fast Math Library on Alpha */
#else
#include <math.h>
#endif
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <float.h>
#include <stdarg.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Get standard integer types
*/
#include <stdint.h>
/**
* 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
#elif defined(__WATCOMC__)
# define finite _finite
#endif
/**
* Disable assorted warnings
*/
#if !defined(OPENSTEP) && (defined(__WIN32__) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP)
# 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
#if defined(__WATCOMC__)
# pragma disable_message(201) /* Disable unreachable code warnings */
#endif
/**
* Function inlining
*/
#ifndef inline
# ifdef __cplusplus
/* C++ supports inline keyword */
# elif defined(__GNUC__)
# define inline __inline__
# elif defined(_MSC_VER)
# define inline __inline
# elif defined(__ICL)
# define inline __inline
# elif defined(__INTEL_COMPILER)
/* Intel compiler supports inline keyword */
# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
# define inline __inline
# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
/* C99 supports inline keyword */
# elif (__STDC_VERSION__ >= 199901L)
/* C99 supports inline keyword */
# else
# define inline
# endif
#endif
#ifndef INLINE
# define INLINE inline
#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__) && __GNUC__ >= 4) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
# define PUBLIC __attribute__((visibility("default")))
# define USED __attribute__((used))
# else
# define PUBLIC
# define USED
# endif
#endif
/**
* Some compilers don't like some of Mesa's const usage. In those places use
* CONST instead of const. Pass -DNO_CONST to compilers where this matters.
*/
#ifdef NO_CONST
# define CONST
#else
# define CONST const
#endif
/**
* __builtin_expect macros
*/
#if !defined(__GNUC__)
# define __builtin_expect(x, y) (x)
#endif
#ifndef likely
# ifdef __GNUC__
# define likely(x) __builtin_expect(!!(x), 1)
# define unlikely(x) __builtin_expect(!!(x), 0)
# else
# define likely(x) (x)
# define unlikely(x) (x)
# endif
#endif
/**
* The __FUNCTION__ gcc variable is generally only used for debugging.
* If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
* Don't define it if using a newer Windows compiler.
*/
#ifndef __FUNCTION__
# if defined(__VMS)
# define __FUNCTION__ "VMS$NL:"
# elif !defined(__GNUC__) && !defined(__xlC__) && \
(!defined(_MSC_VER) || _MSC_VER < 1300)
# if (__STDC_VERSION__ >= 199901L) /* C99 */ || \
(defined(__SUNPRO_C) && defined(__C99FEATURES__))
# define __FUNCTION__ __func__
# else
# define __FUNCTION__ "<unknown>"
# endif
# endif
#endif
#ifndef __func__
# if (__STDC_VERSION__ >= 199901L) || \
(defined(__SUNPRO_C) && defined(__C99FEATURES__))
/* __func__ is part of C99 */
# elif defined(_MSC_VER)
# if _MSC_VER >= 1300
# define __func__ __FUNCTION__
# else
# define __func__ "<unknown>"
# endif
# endif
#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) || defined(__blrts))
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 )
#if !defined(CAPI) && defined(WIN32) && !defined(BUILD_FOR_SNAP)
#define CAPI _cdecl
#endif
/**
* Create a macro so that asm functions can be linked into compilers other
* than GNU C
*/
#ifndef _ASMAPI
#if defined(WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/
#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
/* Turn off macro checking systems used by other libraries */
#ifdef CHECK
#undef CHECK
#endif
/**
* ASSERT macro
*/
#if !defined(_WIN32_WCE)
#if defined(BUILD_FOR_SNAP) && defined(CHECKED)
# define ASSERT(X) _CHECK(X)
#elif defined(DEBUG)
# define ASSERT(X) assert(X)
#else
# define ASSERT(X)
#endif
#endif
/**
* Static (compile-time) assertion.
* Basically, use COND to dimension an array. If COND is false/zero the
* array size will be -1 and we'll get a compilation error.
*/
#define STATIC_ASSERT(COND) \
do { \
typedef int static_assertion_failed[(!!(COND))*2-1]; \
} while (0)
#if (__GNUC__ >= 3)
#define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a)))
#else
#define PRINTFLIKE(f, a)
#endif
#ifndef NULL
#define NULL 0
#endif
/**
* LONGSTRING macro
* gcc -pedantic warns about long string literals, LONGSTRING silences that.
*/
#if !defined(__GNUC__)
# define LONGSTRING
#else
# define LONGSTRING __extension__
#endif
#ifndef M_PI
#define M_PI (3.14159265358979323846)
#endif
#ifndef M_E
#define M_E (2.7182818284590452354)
#endif
#ifndef M_LOG2E
#define M_LOG2E (1.4426950408889634074)
#endif
#ifndef ONE_DIV_SQRT_LN2
#define ONE_DIV_SQRT_LN2 (1.201122408786449815)
#endif
#ifndef FLT_MAX_EXP
#define FLT_MAX_EXP 128
#endif
/**
* USE_IEEE: Determine if we're using IEEE floating point
*/
#if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
defined(__s390x__) || defined(__powerpc__) || \
defined(__x86_64__) || \
defined(ia64) || defined(__ia64__) || \
defined(__hppa__) || defined(hpux) || \
defined(__mips) || defined(_MIPS_ARCH) || \
defined(__arm__) || \
defined(__sh__) || defined(__m32r__) || \
(defined(__sun) && defined(_IEEE_754)) || \
(defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
#define USE_IEEE
#define IEEE_ONE 0x3f800000
#endif
/**
* START/END_FAST_MATH macros:
*
* START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
* original mode to a temporary).
* END_FAST_MATH: Restore x86 FPU to original mode.
*/
#if defined(__GNUC__) && defined(__i386__)
/*
* Set the x86 FPU control word to guarentee only 32 bits of precision
* are stored in registers. Allowing the FPU to store more introduces
* differences between situations where numbers are pulled out of memory
* vs. situations where the compiler is able to optimize register usage.
*
* In the worst case, we force the compiler to use a memory access to
* truncate the float, by specifying the 'volatile' keyword.
*/
/* Hardware default: All exceptions masked, extended double precision,
* round to nearest (IEEE compliant):
*/
#define DEFAULT_X86_FPU 0x037f
/* All exceptions masked, single precision, round to nearest:
*/
#define FAST_X86_FPU 0x003f
/* The fldcw instruction will cause any pending FP exceptions to be
* raised prior to entering the block, and we clear any pending
* exceptions before exiting the block. Hence, asm code has free
* reign over the FPU while in the fast math block.
*/
#if defined(NO_FAST_MATH)
#define START_FAST_MATH(x) \
do { \
static GLuint mask = DEFAULT_X86_FPU; \
__asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \
__asm__ ( "fldcw %0" : : "m" (mask) ); \
} while (0)
#else
#define START_FAST_MATH(x) \
do { \
static GLuint mask = FAST_X86_FPU; \
__asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \
__asm__ ( "fldcw %0" : : "m" (mask) ); \
} while (0)
#endif
/* Restore original FPU mode, and clear any exceptions that may have
* occurred in the FAST_MATH block.
*/
#define END_FAST_MATH(x) \
do { \
__asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) ); \
} while (0)
#elif defined(__WATCOMC__) && defined(__386__)
#define DEFAULT_X86_FPU 0x037f /* See GCC comments above */
#define FAST_X86_FPU 0x003f /* See GCC comments above */
void _watcom_start_fast_math(unsigned short *x,unsigned short *mask);
#pragma aux _watcom_start_fast_math = \
"fnstcw word ptr [eax]" \
"fldcw word ptr [ecx]" \
parm [eax] [ecx] \
modify exact [];
void _watcom_end_fast_math(unsigned short *x);
#pragma aux _watcom_end_fast_math = \
"fnclex" \
"fldcw word ptr [eax]" \
parm [eax] \
modify exact [];
#if defined(NO_FAST_MATH)
#define START_FAST_MATH(x) \
do { \
static GLushort mask = DEFAULT_X86_FPU; \
_watcom_start_fast_math(&x,&mask); \
} while (0)
#else
#define START_FAST_MATH(x) \
do { \
static GLushort mask = FAST_X86_FPU; \
_watcom_start_fast_math(&x,&mask); \
} while (0)
#endif
#define END_FAST_MATH(x) _watcom_end_fast_math(&x)
#elif defined(_MSC_VER) && defined(_M_IX86)
#define DEFAULT_X86_FPU 0x037f /* See GCC comments above */
#define FAST_X86_FPU 0x003f /* See GCC comments above */
#if defined(NO_FAST_MATH)
#define START_FAST_MATH(x) do {\
static GLuint mask = DEFAULT_X86_FPU;\
__asm fnstcw word ptr [x]\
__asm fldcw word ptr [mask]\
} while(0)
#else
#define START_FAST_MATH(x) do {\
static GLuint mask = FAST_X86_FPU;\
__asm fnstcw word ptr [x]\
__asm fldcw word ptr [mask]\
} while(0)
#endif
#define END_FAST_MATH(x) do {\
__asm fnclex\
__asm fldcw word ptr [x]\
} while(0)
#else
#define START_FAST_MATH(x) x = 0
#define END_FAST_MATH(x) (void)(x)
#endif
#ifndef Elements
#define Elements(x) (sizeof(x)/sizeof(*(x)))
#endif
#ifdef __cplusplus
}
#endif
#endif /* COMPILER_H */