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Diffstat (limited to 'include/compiler.h')
| -rw-r--r-- | include/compiler.h | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/include/compiler.h b/include/compiler.h new file mode 100644 index 0000000..fb7baf8 --- /dev/null +++ b/include/compiler.h @@ -0,0 +1,445 @@ +/* + * 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 <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> + +#include "c99_compat.h" /* inline, __func__, etc. */ + + +#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 + + + +/* XXX: Use standard `inline` keyword instead */ +#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 + + +/** + * __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 + +/* 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) || 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 { \ + (void) sizeof(char [1 - 2*!(COND)]); \ + } 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(__s390__) || defined(__s390x__) || defined(__powerpc__) || \ + defined(__x86_64__) || \ + defined(__m68k__) || \ + 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__) +#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 */ |