3 * This file has no copyright assigned and is placed in the Public Domain.
4 * This file is a part of the mingw-runtime package.
5 * No warranty is given; refer to the file DISCLAIMER within the package.
7 * Mathematical functions.
16 #pragma GCC system_header
19 /* All the headers include this file. */
23 * Types for the _exception structure.
26 #define _DOMAIN 1 /* domain error in argument */
27 #define _SING 2 /* singularity */
28 #define _OVERFLOW 3 /* range overflow */
29 #define _UNDERFLOW 4 /* range underflow */
30 #define _TLOSS 5 /* total loss of precision */
31 #define _PLOSS 6 /* partial loss of precision */
34 * Exception types with non-ANSI names for compatibility.
37 #ifndef __STRICT_ANSI__
40 #define DOMAIN _DOMAIN
42 #define OVERFLOW _OVERFLOW
43 #define UNDERFLOW _UNDERFLOW
47 #endif /* Not _NO_OLDNAMES */
48 #endif /* Not __STRICT_ANSI__ */
51 /* Traditional/XOPEN math constants (double precison) */
52 #ifndef __STRICT_ANSI__
53 #define M_E 2.7182818284590452354
54 #define M_LOG2E 1.4426950408889634074
55 #define M_LOG10E 0.43429448190325182765
56 #define M_LN2 0.69314718055994530942
57 #define M_LN10 2.30258509299404568402
58 #define M_PI 3.14159265358979323846
59 #define M_PI_2 1.57079632679489661923
60 #define M_PI_4 0.78539816339744830962
61 #define M_1_PI 0.31830988618379067154
62 #define M_2_PI 0.63661977236758134308
63 #define M_2_SQRTPI 1.12837916709551257390
64 #define M_SQRT2 1.41421356237309504880
65 #define M_SQRT1_2 0.70710678118654752440
68 /* These are also defined in Mingw float.h; needed here as well to work
69 around GCC build issues. */
70 #ifndef __STRICT_ANSI__
71 #ifndef __MINGW_FPCLASS_DEFINED
72 #define __MINGW_FPCLASS_DEFINED 1
73 /* IEEE 754 classication */
74 #define _FPCLASS_SNAN 0x0001 /* Signaling "Not a Number" */
75 #define _FPCLASS_QNAN 0x0002 /* Quiet "Not a Number" */
76 #define _FPCLASS_NINF 0x0004 /* Negative Infinity */
77 #define _FPCLASS_NN 0x0008 /* Negative Normal */
78 #define _FPCLASS_ND 0x0010 /* Negative Denormal */
79 #define _FPCLASS_NZ 0x0020 /* Negative Zero */
80 #define _FPCLASS_PZ 0x0040 /* Positive Zero */
81 #define _FPCLASS_PD 0x0080 /* Positive Denormal */
82 #define _FPCLASS_PN 0x0100 /* Positive Normal */
83 #define _FPCLASS_PINF 0x0200 /* Positive Infinity */
84 #endif /* __MINGW_FPCLASS_DEFINED */
85 #endif /* Not __STRICT_ANSI__ */
94 * HUGE_VAL is returned by strtod when the value would overflow the
95 * representation of 'double'. There are other uses as well.
97 * __imp__HUGE is a pointer to the actual variable _HUGE in
98 * MSVCRT.DLL. If we used _HUGE directly we would get a pointer
99 * to a thunk function.
101 * NOTE: The CRTDLL version uses _HUGE_dll instead.
104 #if __MINGW_GNUC_PREREQ(3, 3)
105 #define HUGE_VAL __builtin_huge_val()
108 #ifndef __DECLSPEC_SUPPORTED
111 extern double* _imp___HUGE;
112 #define HUGE_VAL (*_imp___HUGE)
115 extern double* _imp___HUGE_dll;
116 #define HUGE_VAL (*_imp___HUGE_dll)
119 #else /* __DECLSPEC_SUPPORTED */
122 __MINGW_IMPORT double _HUGE;
123 #define HUGE_VAL _HUGE
126 __MINGW_IMPORT double _HUGE_dll;
127 #define HUGE_VAL _HUGE_dll
130 #endif /* __DECLSPEC_SUPPORTED */
131 #endif /* __MINGW_GNUC_PREREQ(3, 3) */
143 _CRTIMP double __cdecl sin (double);
144 _CRTIMP double __cdecl cos (double);
145 _CRTIMP double __cdecl tan (double);
146 _CRTIMP double __cdecl sinh (double);
147 _CRTIMP double __cdecl cosh (double);
148 _CRTIMP double __cdecl tanh (double);
149 _CRTIMP double __cdecl asin (double);
150 _CRTIMP double __cdecl acos (double);
151 _CRTIMP double __cdecl atan (double);
152 _CRTIMP double __cdecl atan2 (double, double);
153 _CRTIMP double __cdecl exp (double);
154 _CRTIMP double __cdecl log (double);
155 _CRTIMP double __cdecl log10 (double);
156 _CRTIMP double __cdecl pow (double, double);
157 _CRTIMP double __cdecl sqrt (double);
158 _CRTIMP double __cdecl ceil (double);
159 _CRTIMP double __cdecl floor (double);
160 _CRTIMP double __cdecl fabs (double);
161 _CRTIMP double __cdecl ldexp (double, int);
162 _CRTIMP double __cdecl frexp (double, int*);
163 _CRTIMP double __cdecl modf (double, double*);
164 _CRTIMP double __cdecl fmod (double, double);
166 /* Excess precision when using a 64-bit mantissa for FPU math ops can
167 cause unexpected results with some of the MSVCRT math functions. For
168 example, unless the function return value is stored (truncating to
169 53-bit mantissa), calls to pow with both x and y as integral values
170 sometimes produce a non-integral result.
171 One workaround is to reset the FPU env to 53-bit mantissa
172 by a call to fesetenv (FE_PC53_ENV). Amother is to force storage
173 of the return value of individual math functions using wrappers.
174 NB, using these wrappers will disable builtin math functions and
175 hence disable the folding of function results at compile time when
176 arguments are constant. */
179 #define __DEFINE_FLOAT_STORE_MATHFN_D1(fn1) \
180 static __inline__ double \
181 __float_store_ ## fn1 (double x) \
183 __volatile__ double res = (fn1) (x); \
187 #define __DEFINE_FLOAT_STORE_MATHFN_D2(fn2) \
188 static __inline__ double \
189 __float_store_ ## fn2 (double x, double y) \
191 __volatile__ double res = (fn2) (x, y); \
196 /* For example, here is how to force the result of the pow function
200 /* Define the ___float_store_pow function and use it instead of pow(). */
201 __DEFINE_FLOAT_STORE_MATHFN_D2 (pow)
202 #define pow __float_store_pow
205 #ifndef __STRICT_ANSI__
207 /* Complex number (for _cabs). This is the MS version. The ISO
208 C99 counterpart _Complex is an intrinsic type in GCC and
209 'complex' is defined as a macro. See complex.h */
212 double x; /* Real part */
213 double y; /* Imaginary part */
216 _CRTIMP double __cdecl _cabs (struct _complex);
218 _CRTIMP double __cdecl _hypot (double, double);
219 _CRTIMP double __cdecl _j0 (double);
220 _CRTIMP double __cdecl _j1 (double);
221 _CRTIMP double __cdecl _jn (int, double);
222 _CRTIMP double __cdecl _y0 (double);
223 _CRTIMP double __cdecl _y1 (double);
224 _CRTIMP double __cdecl _yn (int, double);
225 _CRTIMP int __cdecl _matherr (struct _exception *);
227 /* These are also declared in Mingw float.h; needed here as well to work
228 around GCC build issues. */
229 /* BEGIN FLOAT.H COPY */
231 * IEEE recommended functions
234 _CRTIMP double __cdecl _chgsign (double);
235 _CRTIMP double __cdecl _copysign (double, double);
236 _CRTIMP double __cdecl _logb (double);
237 _CRTIMP double __cdecl _nextafter (double, double);
238 _CRTIMP double __cdecl _scalb (double, long);
240 _CRTIMP int __cdecl _finite (double);
241 _CRTIMP int __cdecl _fpclass (double);
242 _CRTIMP int __cdecl _isnan (double);
244 /* END FLOAT.H COPY */
248 * Non-underscored versions of non-ANSI functions.
249 * These reside in liboldnames.a.
252 #if !defined (_NO_OLDNAMES)
254 _CRTIMP double __cdecl j0 (double);
255 _CRTIMP double __cdecl j1 (double);
256 _CRTIMP double __cdecl jn (int, double);
257 _CRTIMP double __cdecl y0 (double);
258 _CRTIMP double __cdecl y1 (double);
259 _CRTIMP double __cdecl yn (int, double);
261 _CRTIMP double __cdecl chgsign (double);
263 * scalb() is a GCC built-in.
264 * Exclude this _scalb() stub; the semantics are incompatible
265 * with the built-in implementation.
267 _CRTIMP double __cdecl scalb (double, long);
270 _CRTIMP int __cdecl finite (double);
271 _CRTIMP int __cdecl fpclass (double);
273 #define FP_SNAN _FPCLASS_SNAN
274 #define FP_QNAN _FPCLASS_QNAN
275 #define FP_NINF _FPCLASS_NINF
276 #define FP_PINF _FPCLASS_PINF
277 #define FP_NDENORM _FPCLASS_ND
278 #define FP_PDENORM _FPCLASS_PD
279 #define FP_NZERO _FPCLASS_NZ
280 #define FP_PZERO _FPCLASS_PZ
281 #define FP_NNORM _FPCLASS_NN
282 #define FP_PNORM _FPCLASS_PN
284 #endif /* Not _NO_OLDNAMES */
286 /* This require msvcr70.dll or higher. */
287 #if __MSVCRT_VERSION__ >= 0x0700
288 _CRTIMP int __cdecl _set_SSE2_enable (int);
289 #endif /* __MSVCRT_VERSION__ >= 0x0700 */
292 #endif /* __STRICT_ANSI__ */
296 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
297 || !defined __STRICT_ANSI__ || defined __cplusplus
299 #if __MINGW_GNUC_PREREQ(3, 3)
300 #define HUGE_VALF __builtin_huge_valf()
301 #define HUGE_VALL __builtin_huge_vall()
302 #define INFINITY __builtin_inf()
303 #define NAN __builtin_nan("")
305 extern const float __INFF;
306 #define HUGE_VALF __INFF
307 extern const long double __INFL;
308 #define HUGE_VALL __INFL
309 #define INFINITY HUGE_VALF
310 extern const double __QNAN;
312 #endif /* __MINGW_GNUC_PREREQ(3, 3) */
314 /* Use the compiler's builtin define for FLT_EVAL_METHOD to
315 set float_t and double_t. */
316 #if defined(__FLT_EVAL_METHOD__)
317 # if ( __FLT_EVAL_METHOD__== 0)
318 typedef float float_t;
319 typedef double double_t;
320 # elif (__FLT_EVAL_METHOD__ == 1)
321 typedef double float_t;
322 typedef double double_t;
323 # elif (__FLT_EVAL_METHOD__ == 2)
324 typedef long double float_t;
325 typedef long double double_t;
327 #else /* ix87 FPU default */
328 typedef long double float_t;
329 typedef long double double_t;
334 Return values for fpclassify.
335 These are based on Intel x87 fpu condition codes
336 in the high byte of status word and differ from
337 the return values for MS IEEE 754 extension _fpclass()
339 #define FP_NAN 0x0100
340 #define FP_NORMAL 0x0400
341 #define FP_INFINITE (FP_NAN | FP_NORMAL)
342 #define FP_ZERO 0x4000
343 #define FP_SUBNORMAL (FP_NORMAL | FP_ZERO)
344 /* 0x0200 is signbit mask */
348 We can't inline float or double, because we want to ensure truncation
349 to semantic type before classification.
350 (A normal long double value might become subnormal when
351 converted to double, and zero when converted to float.)
354 extern int __cdecl __fpclassifyf (float);
355 extern int __cdecl __fpclassify (double);
356 extern int __cdecl __fpclassifyl (long double);
358 #ifndef __NO_INLINE__
359 __CRT_INLINE int __cdecl __fpclassifyl (long double x){
361 __asm__ ("fxam; fstsw %%ax;" : "=a" (sw): "t" (x));
362 return sw & (FP_NAN | FP_NORMAL | FP_ZERO );
366 #define fpclassify(x) (sizeof (x) == sizeof (float) ? __fpclassifyf (x) \
367 : sizeof (x) == sizeof (double) ? __fpclassify (x) \
371 #define isfinite(x) ((fpclassify(x) & FP_NAN) == 0)
374 #define isinf(x) (fpclassify(x) == FP_INFINITE)
377 /* We don't need to worry about truncation here:
378 A NaN stays a NaN. */
379 extern int __cdecl __isnan (double);
380 extern int __cdecl __isnanf (float);
381 extern int __cdecl __isnanl (long double);
382 #ifndef __NO_INLINE__
383 __CRT_INLINE int __cdecl __isnan (double _x)
387 "fstsw %%ax": "=a" (sw) : "t" (_x));
388 return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
392 __CRT_INLINE int __cdecl __isnanf (float _x)
396 "fstsw %%ax": "=a" (sw) : "t" (_x));
397 return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
401 __CRT_INLINE int __cdecl __isnanl (long double _x)
405 "fstsw %%ax": "=a" (sw) : "t" (_x));
406 return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
411 #define isnan(x) (sizeof (x) == sizeof (float) ? __isnanf (x) \
412 : sizeof (x) == sizeof (double) ? __isnan (x) \
416 #define isnormal(x) (fpclassify(x) == FP_NORMAL)
418 /* 7.12.3.6 The signbit macro */
419 extern int __cdecl __signbit (double);
420 extern int __cdecl __signbitf (float);
421 extern int __cdecl __signbitl (long double);
422 #ifndef __NO_INLINE__
423 __CRT_INLINE int __cdecl __signbit (double x) {
425 __asm__ ( "fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
426 return (stw & 0x0200) != 0;
429 __CRT_INLINE int __cdecl __signbitf (float x) {
431 __asm__ ("fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
432 return (stw & 0x0200) != 0;
435 __CRT_INLINE int __cdecl __signbitl (long double x) {
437 __asm__ ("fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
438 return (stw & 0x0200) != 0;
442 #define signbit(x) (sizeof (x) == sizeof (float) ? __signbitf (x) \
443 : sizeof (x) == sizeof (double) ? __signbit (x) \
446 /* 7.12.4 Trigonometric functions: Double in C89 */
447 extern float __cdecl sinf (float);
448 extern long double __cdecl sinl (long double);
450 extern float __cdecl cosf (float);
451 extern long double __cdecl cosl (long double);
453 extern float __cdecl tanf (float);
454 extern long double __cdecl tanl (long double);
456 extern float __cdecl asinf (float);
457 extern long double __cdecl asinl (long double);
459 extern float __cdecl acosf (float);
460 extern long double __cdecl acosl (long double);
462 extern float __cdecl atanf (float);
463 extern long double __cdecl atanl (long double);
465 extern float __cdecl atan2f (float, float);
466 extern long double __cdecl atan2l (long double, long double);
468 /* 7.12.5 Hyperbolic functions: Double in C89 */
469 extern float __cdecl sinhf (float);
470 #ifndef __NO_INLINE__
471 __CRT_INLINE float __cdecl sinhf (float x)
472 {return (float) sinh (x);}
474 extern long double __cdecl sinhl (long double);
476 extern float __cdecl coshf (float);
477 #ifndef __NO_INLINE__
478 __CRT_INLINE float __cdecl coshf (float x)
479 {return (float) cosh (x);}
481 extern long double __cdecl coshl (long double);
483 extern float __cdecl tanhf (float);
484 #ifndef __NO_INLINE__
485 __CRT_INLINE float __cdecl tanhf (float x)
486 {return (float) tanh (x);}
488 extern long double __cdecl tanhl (long double);
490 /* Inverse hyperbolic trig functions */
492 extern double __cdecl acosh (double);
493 extern float __cdecl acoshf (float);
494 extern long double __cdecl acoshl (long double);
497 extern double __cdecl asinh (double);
498 extern float __cdecl asinhf (float);
499 extern long double __cdecl asinhl (long double);
502 extern double __cdecl atanh (double);
503 extern float __cdecl atanhf (float);
504 extern long double __cdecl atanhl (long double);
506 /* Exponentials and logarithms */
507 /* 7.12.6.1 Double in C89 */
508 extern float __cdecl expf (float);
509 #ifndef __NO_INLINE__
510 __CRT_INLINE float __cdecl expf (float x)
511 {return (float) exp (x);}
513 extern long double __cdecl expl (long double);
516 extern double __cdecl exp2(double);
517 extern float __cdecl exp2f(float);
518 extern long double __cdecl exp2l(long double);
520 /* 7.12.6.3 The expm1 functions */
521 /* TODO: These could be inlined */
522 extern double __cdecl expm1(double);
523 extern float __cdecl expm1f(float);
524 extern long double __cdecl expm1l(long double);
526 /* 7.12.6.4 Double in C89 */
527 extern float __cdecl frexpf (float, int*);
528 #ifndef __NO_INLINE__
529 __CRT_INLINE float __cdecl frexpf (float x, int* expn)
530 {return (float) frexp (x, expn);}
532 extern long double __cdecl frexpl (long double, int*);
535 #define FP_ILOGB0 ((int)0x80000000)
536 #define FP_ILOGBNAN ((int)0x80000000)
537 extern int __cdecl ilogb (double);
538 extern int __cdecl ilogbf (float);
539 extern int __cdecl ilogbl (long double);
541 /* 7.12.6.6 Double in C89 */
542 extern float __cdecl ldexpf (float, int);
543 #ifndef __NO_INLINE__
544 __CRT_INLINE float __cdecl ldexpf (float x, int expn)
545 {return (float) ldexp (x, expn);}
547 extern long double __cdecl ldexpl (long double, int);
549 /* 7.12.6.7 Double in C89 */
550 extern float __cdecl logf (float);
551 extern long double __cdecl logl (long double);
553 /* 7.12.6.8 Double in C89 */
554 extern float __cdecl log10f (float);
555 extern long double __cdecl log10l (long double);
558 extern double __cdecl log1p(double);
559 extern float __cdecl log1pf(float);
560 extern long double __cdecl log1pl(long double);
563 extern double __cdecl log2 (double);
564 extern float __cdecl log2f (float);
565 extern long double __cdecl log2l (long double);
568 extern double __cdecl logb (double);
569 extern float __cdecl logbf (float);
570 extern long double __cdecl logbl (long double);
572 /* Inline versions. GCC-4.0+ can do a better fast-math optimization
574 #ifndef __NO_INLINE__
575 #if !(__MINGW_GNUC_PREREQ (4, 0) && defined __FAST_MATH__ )
576 __CRT_INLINE double __cdecl logb (double x)
579 __asm__ ("fxtract\n\t"
580 "fstp %%st" : "=t" (res) : "0" (x));
584 __CRT_INLINE float __cdecl logbf (float x)
587 __asm__ ("fxtract\n\t"
588 "fstp %%st" : "=t" (res) : "0" (x));
592 __CRT_INLINE long double __cdecl logbl (long double x)
595 __asm__ ("fxtract\n\t"
596 "fstp %%st" : "=t" (res) : "0" (x));
599 #endif /* !defined __FAST_MATH__ || !__MINGW_GNUC_PREREQ (4, 0) */
600 #endif /* !defined __NO_INLINE__ */
602 /* 7.12.6.12 Double in C89 */
603 extern float __cdecl modff (float, float*);
604 extern long double __cdecl modfl (long double, long double*);
607 extern double __cdecl scalbn (double, int);
608 extern float __cdecl scalbnf (float, int);
609 extern long double __cdecl scalbnl (long double, int);
611 extern double __cdecl scalbln (double, long);
612 extern float __cdecl scalblnf (float, long);
613 extern long double __cdecl scalblnl (long double, long);
616 /* Implementations adapted from Cephes versions */
617 extern double __cdecl cbrt (double);
618 extern float __cdecl cbrtf (float);
619 extern long double __cdecl cbrtl (long double);
621 /* 7.12.7.2 The fabs functions: Double in C89 */
622 extern float __cdecl fabsf (float x);
623 extern long double __cdecl fabsl (long double x);
626 extern double __cdecl hypot (double, double); /* in libmoldname.a */
627 extern float __cdecl hypotf (float, float);
628 #ifndef __NO_INLINE__
629 __CRT_INLINE float __cdecl hypotf (float x, float y)
630 { return (float) hypot (x, y);}
632 extern long double __cdecl hypotl (long double, long double);
634 /* 7.12.7.4 The pow functions. Double in C89 */
635 extern float __cdecl powf (float, float);
636 #ifndef __NO_INLINE__
637 __CRT_INLINE float __cdecl powf (float x, float y)
638 {return (float) pow (x, y);}
640 extern long double __cdecl powl (long double, long double);
642 /* 7.12.7.5 The sqrt functions. Double in C89. */
643 extern float __cdecl sqrtf (float);
644 extern long double __cdecl sqrtl (long double);
646 /* 7.12.8.1 The erf functions */
647 extern double __cdecl erf (double);
648 extern float __cdecl erff (float);
649 extern long double __cdecl erfl (long double);
651 /* 7.12.8.2 The erfc functions */
652 extern double __cdecl erfc (double);
653 extern float __cdecl erfcf (float);
654 extern long double __cdecl erfcl (long double);
656 /* 7.12.8.3 The lgamma functions */
657 extern double __cdecl lgamma (double);
658 extern float __cdecl lgammaf (float);
659 extern long double __cdecl lgammal (long double);
661 /* 7.12.8.4 The tgamma functions */
662 extern double __cdecl tgamma (double);
663 extern float __cdecl tgammaf (float);
664 extern long double __cdecl tgammal (long double);
666 /* 7.12.9.1 Double in C89 */
667 extern float __cdecl ceilf (float);
668 extern long double __cdecl ceill (long double);
670 /* 7.12.9.2 Double in C89 */
671 extern float __cdecl floorf (float);
672 extern long double __cdecl floorl (long double);
675 extern double __cdecl nearbyint ( double);
676 extern float __cdecl nearbyintf (float);
677 extern long double __cdecl nearbyintl (long double);
680 /* round, using fpu control word settings */
681 extern double __cdecl rint (double);
682 extern float __cdecl rintf (float);
683 extern long double __cdecl rintl (long double);
686 extern long __cdecl lrint (double);
687 extern long __cdecl lrintf (float);
688 extern long __cdecl lrintl (long double);
690 extern long long __cdecl llrint (double);
691 extern long long __cdecl llrintf (float);
692 extern long long __cdecl llrintl (long double);
694 /* Inline versions of above.
695 GCC 4.0+ can do a better fast-math job with __builtins. */
696 #ifndef __NO_INLINE__
697 #if !(__MINGW_GNUC_PREREQ (4, 0) && defined __FAST_MATH__ )
698 __CRT_INLINE double __cdecl rint (double x)
701 __asm__ ("frndint;": "=t" (retval) : "0" (x));
705 __CRT_INLINE float __cdecl rintf (float x)
708 __asm__ ("frndint;" : "=t" (retval) : "0" (x) );
712 __CRT_INLINE long double __cdecl rintl (long double x)
715 __asm__ ("frndint;" : "=t" (retval) : "0" (x) );
719 __CRT_INLINE long __cdecl lrint (double x)
723 ("fistpl %0" : "=m" (retval) : "t" (x) : "st");
727 __CRT_INLINE long __cdecl lrintf (float x)
731 ("fistpl %0" : "=m" (retval) : "t" (x) : "st");
735 __CRT_INLINE long __cdecl lrintl (long double x)
739 ("fistpl %0" : "=m" (retval) : "t" (x) : "st");
743 __CRT_INLINE long long __cdecl llrint (double x)
747 ("fistpll %0" : "=m" (retval) : "t" (x) : "st");
751 __CRT_INLINE long long __cdecl llrintf (float x)
755 ("fistpll %0" : "=m" (retval) : "t" (x) : "st");
759 __CRT_INLINE long long __cdecl llrintl (long double x)
763 ("fistpll %0" : "=m" (retval) : "t" (x) : "st");
766 #endif /* !__FAST_MATH__ || !__MINGW_GNUC_PREREQ (4,0) */
767 #endif /* !defined __NO_INLINE */
770 /* round away from zero, regardless of fpu control word settings */
771 extern double __cdecl round (double);
772 extern float __cdecl roundf (float);
773 extern long double __cdecl roundl (long double);
776 extern long __cdecl lround (double);
777 extern long __cdecl lroundf (float);
778 extern long __cdecl lroundl (long double);
780 extern long long __cdecl llround (double);
781 extern long long __cdecl llroundf (float);
782 extern long long __cdecl llroundl (long double);
785 /* round towards zero, regardless of fpu control word settings */
786 extern double __cdecl trunc (double);
787 extern float __cdecl truncf (float);
788 extern long double __cdecl truncl (long double);
790 /* 7.12.10.1 Double in C89 */
791 extern float __cdecl fmodf (float, float);
792 extern long double __cdecl fmodl (long double, long double);
795 extern double __cdecl remainder (double, double);
796 extern float __cdecl remainderf (float, float);
797 extern long double __cdecl remainderl (long double, long double);
800 extern double __cdecl remquo(double, double, int *);
801 extern float __cdecl remquof(float, float, int *);
802 extern long double __cdecl remquol(long double, long double, int *);
805 extern double __cdecl copysign (double, double); /* in libmoldname.a */
806 extern float __cdecl copysignf (float, float);
807 extern long double __cdecl copysignl (long double, long double);
809 /* 7.12.11.2 Return a NaN */
810 extern double __cdecl nan(const char *tagp);
811 extern float __cdecl nanf(const char *tagp);
812 extern long double __cdecl nanl(const char *tagp);
814 #ifndef __STRICT_ANSI__
815 #define _nan() nan("")
816 #define _nanf() nanf("")
817 #define _nanl() nanl("")
821 extern double __cdecl nextafter (double, double); /* in libmoldname.a */
822 extern float __cdecl nextafterf (float, float);
823 extern long double __cdecl nextafterl (long double, long double);
825 /* 7.12.11.4 The nexttoward functions */
826 extern double __cdecl nexttoward (double, long double);
827 extern float __cdecl nexttowardf (float, long double);
828 extern long double __cdecl nexttowardl (long double, long double);
831 /* x > y ? (x - y) : 0.0 */
832 extern double __cdecl fdim (double x, double y);
833 extern float __cdecl fdimf (float x, float y);
834 extern long double __cdecl fdiml (long double x, long double y);
837 NaN arguments are treated as missing data: if one argument is a NaN
838 and the other numeric, then these functions choose the numeric
842 extern double __cdecl fmax (double, double);
843 extern float __cdecl fmaxf (float, float);
844 extern long double __cdecl fmaxl (long double, long double);
847 extern double __cdecl fmin (double, double);
848 extern float __cdecl fminf (float, float);
849 extern long double __cdecl fminl (long double, long double);
852 /* return x * y + z as a ternary op */
853 extern double __cdecl fma (double, double, double);
854 extern float __cdecl fmaf (float, float, float);
855 extern long double __cdecl fmal (long double, long double, long double);
860 * With these functions, comparisons involving quiet NaNs set the FP
861 * condition code to "unordered". The IEEE floating-point spec
862 * dictates that the result of floating-point comparisons should be
863 * false whenever a NaN is involved, with the exception of the != op,
864 * which always returns true: yes, (NaN != NaN) is true).
869 #define isgreater(x, y) __builtin_isgreater(x, y)
870 #define isgreaterequal(x, y) __builtin_isgreaterequal(x, y)
871 #define isless(x, y) __builtin_isless(x, y)
872 #define islessequal(x, y) __builtin_islessequal(x, y)
873 #define islessgreater(x, y) __builtin_islessgreater(x, y)
874 #define isunordered(x, y) __builtin_isunordered(x, y)
878 extern int __cdecl __fp_unordered_compare (long double, long double);
879 #ifndef __NO_INLINE__
880 __CRT_INLINE int __cdecl
881 __fp_unordered_compare (long double x, long double y){
882 unsigned short retval;
883 __asm__ ("fucom %%st(1);"
884 "fnstsw;": "=a" (retval) : "t" (x), "u" (y));
889 #define isgreater(x, y) ((__fp_unordered_compare(x, y) \
891 #define isless(x, y) ((__fp_unordered_compare (y, x) \
893 #define isgreaterequal(x, y) ((__fp_unordered_compare (x, y) \
895 #define islessequal(x, y) ((__fp_unordered_compare(y, x) \
897 #define islessgreater(x, y) ((__fp_unordered_compare(x, y) \
898 & FP_SUBNORMAL) == 0)
899 #define isunordered(x, y) ((__fp_unordered_compare(x, y) \
905 #endif /* __STDC_VERSION__ >= 199901L */
906 #endif /* __NO_ISOCEXT */
912 #endif /* Not RC_INVOKED */
915 #endif /* Not _MATH_H_ */