2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 * Compiler-related stuff.
39 #if defined(__alpha__) && defined(CCPML)
40 #include <cpml.h> /* use Compaq's Fast Math Library on Alpha */
58 * Get standard integer types
64 * Sun compilers define __i386 instead of the gcc-style __i386__
67 # if !defined(__i386__) && defined(__i386)
69 # elif !defined(__amd64__) && defined(__amd64)
71 # elif !defined(__sparc__) && defined(__sparc)
74 # if !defined(__volatile)
75 # define __volatile volatile
84 # define finite _finite
85 #elif defined(__WATCOMC__)
86 # define finite _finite
91 * Disable assorted warnings
93 #if !defined(OPENSTEP) && (defined(__WIN32__) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP)
94 # if !defined(__GNUC__) /* mingw environment */
95 # pragma warning( disable : 4068 ) /* unknown pragma */
96 # pragma warning( disable : 4710 ) /* function 'foo' not inlined */
97 # pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
98 # pragma warning( disable : 4127 ) /* conditional expression is constant */
99 # if defined(MESA_MINWARN)
100 # pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
101 # pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
102 # pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
103 # pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
104 # pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
108 #if defined(__WATCOMC__)
109 # pragma disable_message(201) /* Disable unreachable code warnings */
119 /* C++ supports inline keyword */
120 # elif defined(__GNUC__)
121 # define inline __inline__
122 # elif defined(_MSC_VER)
123 # define inline __inline
124 # elif defined(__ICL)
125 # define inline __inline
126 # elif defined(__INTEL_COMPILER)
127 /* Intel compiler supports inline keyword */
128 # elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
129 # define inline __inline
130 # elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
131 /* C99 supports inline keyword */
132 # elif (__STDC_VERSION__ >= 199901L)
133 /* C99 supports inline keyword */
139 # define INLINE inline
146 * If we build the library with gcc's -fvisibility=hidden flag, we'll
147 * use the PUBLIC macro to mark functions that are to be exported.
149 * We also need to define a USED attribute, so the optimizer doesn't
150 * inline a static function that we later use in an alias. - ajax
153 # if (defined(__GNUC__) && __GNUC__ >= 4) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
154 # define PUBLIC __attribute__((visibility("default")))
155 # define USED __attribute__((used))
164 * Some compilers don't like some of Mesa's const usage. In those places use
165 * CONST instead of const. Pass -DNO_CONST to compilers where this matters.
175 * __builtin_expect macros
177 #if !defined(__GNUC__)
178 # define __builtin_expect(x, y) (x)
183 # define likely(x) __builtin_expect(!!(x), 1)
184 # define unlikely(x) __builtin_expect(!!(x), 0)
186 # define likely(x) (x)
187 # define unlikely(x) (x)
192 * The __FUNCTION__ gcc variable is generally only used for debugging.
193 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
194 * Don't define it if using a newer Windows compiler.
198 # define __FUNCTION__ "VMS$NL:"
199 # elif !defined(__GNUC__) && !defined(__xlC__) && \
200 (!defined(_MSC_VER) || _MSC_VER < 1300)
201 # if (__STDC_VERSION__ >= 199901L) /* C99 */ || \
202 (defined(__SUNPRO_C) && defined(__C99FEATURES__))
203 # define __FUNCTION__ __func__
205 # define __FUNCTION__ "<unknown>"
210 # if (__STDC_VERSION__ >= 199901L) || \
211 (defined(__SUNPRO_C) && defined(__C99FEATURES__))
212 /* __func__ is part of C99 */
213 # elif defined(_MSC_VER)
214 # if _MSC_VER >= 1300
215 # define __func__ __FUNCTION__
217 # define __func__ "<unknown>"
224 * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32.
225 * Do not use these unless absolutely necessary!
226 * Try to use a runtime test instead.
227 * For now, only used by some DRI hardware drivers for color/texel packing.
229 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
230 #if defined(__linux__)
231 #include <byteswap.h>
232 #define CPU_TO_LE32( x ) bswap_32( x )
233 #elif defined(__APPLE__)
234 #include <CoreFoundation/CFByteOrder.h>
235 #define CPU_TO_LE32( x ) CFSwapInt32HostToLittle( x )
236 #elif (defined(_AIX) || defined(__blrts))
237 static INLINE GLuint
CPU_TO_LE32(GLuint x
)
239 return (((x
& 0x000000ff) << 24) |
240 ((x
& 0x0000ff00) << 8) |
241 ((x
& 0x00ff0000) >> 8) |
242 ((x
& 0xff000000) >> 24));
245 #include <sys/endian.h>
246 #define CPU_TO_LE32( x ) bswap32( x )
248 #define MESA_BIG_ENDIAN 1
250 #define CPU_TO_LE32( x ) ( x )
251 #define MESA_LITTLE_ENDIAN 1
253 #define LE32_TO_CPU( x ) CPU_TO_LE32( x )
257 #if !defined(CAPI) && defined(WIN32) && !defined(BUILD_FOR_SNAP)
263 * Create a macro so that asm functions can be linked into compilers other
267 #if defined(WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/
268 #define _ASMAPI __cdecl
272 #ifdef PTR_DECL_IN_FRONT
273 #define _ASMAPIP * _ASMAPI
275 #define _ASMAPIP _ASMAPI *
280 #define _NORMAPI _ASMAPI
281 #define _NORMAPIP _ASMAPIP
288 /* This is a macro on IRIX */
294 /* Turn off macro checking systems used by other libraries */
303 #if !defined(_WIN32_WCE)
304 #if defined(BUILD_FOR_SNAP) && defined(CHECKED)
305 # define ASSERT(X) _CHECK(X)
307 # define ASSERT(X) assert(X)
314 #define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a)))
316 #define PRINTFLIKE(f, a)
326 * gcc -pedantic warns about long string literals, LONGSTRING silences that.
328 #if !defined(__GNUC__)
331 # define LONGSTRING __extension__
336 #define M_PI (3.14159265358979323846)
340 #define M_E (2.7182818284590452354)
344 #define M_LOG2E (1.4426950408889634074)
347 #ifndef ONE_DIV_SQRT_LN2
348 #define ONE_DIV_SQRT_LN2 (1.201122408786449815)
352 #define FLT_MAX_EXP 128
357 * USE_IEEE: Determine if we're using IEEE floating point
359 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
360 defined(__s390x__) || defined(__powerpc__) || \
361 defined(__x86_64__) || \
362 defined(ia64) || defined(__ia64__) || \
363 defined(__hppa__) || defined(hpux) || \
364 defined(__mips) || defined(_MIPS_ARCH) || \
365 defined(__arm__) || \
366 defined(__sh__) || defined(__m32r__) || \
367 (defined(__sun) && defined(_IEEE_754)) || \
368 (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
370 #define IEEE_ONE 0x3f800000
375 * START/END_FAST_MATH macros:
377 * START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
378 * original mode to a temporary).
379 * END_FAST_MATH: Restore x86 FPU to original mode.
381 #if defined(__GNUC__) && defined(__i386__)
383 * Set the x86 FPU control word to guarentee only 32 bits of precision
384 * are stored in registers. Allowing the FPU to store more introduces
385 * differences between situations where numbers are pulled out of memory
386 * vs. situations where the compiler is able to optimize register usage.
388 * In the worst case, we force the compiler to use a memory access to
389 * truncate the float, by specifying the 'volatile' keyword.
391 /* Hardware default: All exceptions masked, extended double precision,
392 * round to nearest (IEEE compliant):
394 #define DEFAULT_X86_FPU 0x037f
395 /* All exceptions masked, single precision, round to nearest:
397 #define FAST_X86_FPU 0x003f
398 /* The fldcw instruction will cause any pending FP exceptions to be
399 * raised prior to entering the block, and we clear any pending
400 * exceptions before exiting the block. Hence, asm code has free
401 * reign over the FPU while in the fast math block.
403 #if defined(NO_FAST_MATH)
404 #define START_FAST_MATH(x) \
406 static GLuint mask = DEFAULT_X86_FPU; \
407 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \
408 __asm__ ( "fldcw %0" : : "m" (mask) ); \
411 #define START_FAST_MATH(x) \
413 static GLuint mask = FAST_X86_FPU; \
414 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \
415 __asm__ ( "fldcw %0" : : "m" (mask) ); \
418 /* Restore original FPU mode, and clear any exceptions that may have
419 * occurred in the FAST_MATH block.
421 #define END_FAST_MATH(x) \
423 __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) ); \
426 #elif defined(__WATCOMC__) && defined(__386__)
427 #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */
428 #define FAST_X86_FPU 0x003f /* See GCC comments above */
429 void _watcom_start_fast_math(unsigned short *x
,unsigned short *mask
);
430 #pragma aux _watcom_start_fast_math = \
431 "fnstcw word ptr [eax]" \
432 "fldcw word ptr [ecx]" \
435 void _watcom_end_fast_math(unsigned short *x
);
436 #pragma aux _watcom_end_fast_math = \
438 "fldcw word ptr [eax]" \
441 #if defined(NO_FAST_MATH)
442 #define START_FAST_MATH(x) \
444 static GLushort mask = DEFAULT_X86_FPU; \
445 _watcom_start_fast_math(&x,&mask); \
448 #define START_FAST_MATH(x) \
450 static GLushort mask = FAST_X86_FPU; \
451 _watcom_start_fast_math(&x,&mask); \
454 #define END_FAST_MATH(x) _watcom_end_fast_math(&x)
456 #elif defined(_MSC_VER) && defined(_M_IX86)
457 #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */
458 #define FAST_X86_FPU 0x003f /* See GCC comments above */
459 #if defined(NO_FAST_MATH)
460 #define START_FAST_MATH(x) do {\
461 static GLuint mask = DEFAULT_X86_FPU;\
462 __asm fnstcw word ptr [x]\
463 __asm fldcw word ptr [mask]\
466 #define START_FAST_MATH(x) do {\
467 static GLuint mask = FAST_X86_FPU;\
468 __asm fnstcw word ptr [x]\
469 __asm fldcw word ptr [mask]\
472 #define END_FAST_MATH(x) do {\
474 __asm fldcw word ptr [x]\
478 #define START_FAST_MATH(x) x = 0
479 #define END_FAST_MATH(x) (void)(x)
484 #define Elements(x) (sizeof(x)/sizeof(*(x)))
494 #endif /* COMPILER_H */