2 * msvcrt.dll math functions
4 * Copyright 2000 Jon Griffiths
10 #define __USE_ISOC99 1
16 DEFAULT_DEBUG_CHANNEL(msvcrt);
19 #ifndef finite /* Could be a macro */
21 #define finite(x) isfinite(x)
23 #define finite(x) (!isnan(x)) /* At least catch some cases */
32 /* fpclass constants */
33 #define _FPCLASS_SNAN 1
34 #define _FPCLASS_QNAN 2
35 #define _FPCLASS_NINF 4
37 #define _FPCLASS_ND 16
38 #define _FPCLASS_NZ 32
39 #define _FPCLASS_PZ 64
40 #define _FPCLASS_PD 128
41 #define _FPCLASS_PN 256
42 #define _FPCLASS_PINF 512
44 /* _statusfp bit flags */
45 #define _SW_INEXACT 0x1
46 #define _SW_UNDERFLOW 0x2
47 #define _SW_OVERFLOW 0x4
48 #define _SW_ZERODIVIDE 0x8
49 #define _SW_INVALID 0x10
50 #define _SW_DENORMAL 0x80000
52 /* _controlfp masks and bitflags - x86 only so far*/
54 #define _MCW_EM 0x8001f
55 #define _EM_INEXACT 0x1
56 #define _EM_UNDERFLOW 0x2
57 #define _EM_OVERFLOW 0x4
58 #define _EM_ZERODIVIDE 0x8
59 #define _EM_INVALID 0x10
63 #define _RC_DOWN 0x100
65 #define _RC_CHOP 0x300
67 #define _MCW_PC 0x30000
69 #define _PC_53 0x10000
70 #define _PC_24 0x20000
72 #define _MCW_IC 0x40000
73 #define _IC_AFFINE 0x40000
74 #define _IC_PROJECTIVE 0x0
76 #define _EM_DENORMAL 0x80000
79 typedef struct __MSVCRT_complex
85 typedef struct __MSVCRT_exception
95 typedef int (__cdecl *MSVCRT_matherr_func)(MSVCRT_exception *);
97 static MSVCRT_matherr_func MSVCRT_default_matherr_func = NULL;
99 #if defined(__GNUC__) && defined(__i386__)
101 #define FPU_DOUBLE(var) double var; \
102 __asm__ __volatile__( "fstpl %0;fwait" : "=m" (var) : )
103 #define FPU_DOUBLES(var1,var2) double var1,var2; \
104 __asm__ __volatile__( "fstpl %0;fwait" : "=m" (var2) : ); \
105 __asm__ __volatile__( "fstpl %0;fwait" : "=m" (var1) : )
107 /*********************************************************************
110 double __cdecl MSVCRT__CIacos(void)
113 if (x < -1.0 || x > 1.0 || !finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
117 /*********************************************************************
120 double __cdecl MSVCRT__CIasin(void)
123 if (x < -1.0 || x > 1.0 || !finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
127 /*********************************************************************
130 double __cdecl MSVCRT__CIatan(void)
133 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
137 /*********************************************************************
138 * _CIatan2 (MSVCRT.@)
140 double __cdecl MSVCRT__CIatan2(void)
143 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
147 /*********************************************************************
150 double __cdecl MSVCRT__CIcos(void)
153 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
157 /*********************************************************************
160 double __cdecl MSVCRT__CIcosh(void)
163 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
167 /*********************************************************************
170 double __cdecl MSVCRT__CIexp(void)
173 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
177 /*********************************************************************
180 double __cdecl MSVCRT__CIfmod(void)
183 if (!finite(x) || !finite(y)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
187 /*********************************************************************
190 double __cdecl MSVCRT__CIlog(void)
193 if (x < 0.0 || !finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
194 if (x == 0.0) SET_THREAD_VAR(errno,MSVCRT_ERANGE);
198 /*********************************************************************
199 * _CIlog10 (MSVCRT.@)
201 double __cdecl MSVCRT__CIlog10(void)
204 if (x < 0.0 || !finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
205 if (x == 0.0) SET_THREAD_VAR(errno,MSVCRT_ERANGE);
209 /*********************************************************************
212 double __cdecl MSVCRT__CIpow(void)
216 /* FIXME: If x < 0 and y is not integral, set EDOM */
218 if (!finite(z)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
222 /*********************************************************************
225 double __cdecl MSVCRT__CIsin(void)
228 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
232 /*********************************************************************
235 double __cdecl MSVCRT__CIsinh(void)
238 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
242 /*********************************************************************
245 double __cdecl MSVCRT__CIsqrt(void)
248 if (x < 0.0 || !finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
252 /*********************************************************************
255 double __cdecl MSVCRT__CItan(void)
258 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
262 /*********************************************************************
265 double __cdecl MSVCRT__CItanh(void)
268 if (!finite(x)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
272 #else /* defined(__GNUC__) && defined(__i386__) */
274 /* The above cannot be called on non x86 platforms, stub them for linking */
276 #define IX86_ONLY(func) double __cdecl MSVCRT_##func(void) { return 0.0; }
295 #endif /* defined(__GNUC__) && defined(__i386__) */
297 /*********************************************************************
298 * _fpclass (MSVCRT.@)
300 int __cdecl MSVCRT__fpclass(double num)
302 #if defined(HAVE_FPCLASS) || defined(fpclass)
303 switch (fpclass( num ))
305 case FP_SNAN: return _FPCLASS_SNAN;
306 case FP_QNAN: return _FPCLASS_QNAN;
307 case FP_NINF: return _FPCLASS_NINF;
308 case FP_PINF: return _FPCLASS_PINF;
309 case FP_NDENORM: return _FPCLASS_ND;
310 case FP_PDENORM: return _FPCLASS_PD;
311 case FP_NZERO: return _FPCLASS_NZ;
312 case FP_PZERO: return _FPCLASS_PZ;
313 case FP_NNORM: return _FPCLASS_NN;
316 #elif defined (fpclassify)
317 switch (fpclassify( num ))
319 case FP_NAN: return _FPCLASS_QNAN;
320 case FP_INFINITE: return signbit(num) ? _FPCLASS_NINF : _FPCLASS_PINF;
321 case FP_SUBNORMAL: return signbit(num) ?_FPCLASS_ND : _FPCLASS_PD;
322 case FP_ZERO: return signbit(num) ? _FPCLASS_NZ : _FPCLASS_PZ;
324 return signbit(num) ? _FPCLASS_NN : _FPCLASS_PN;
327 return _FPCLASS_QNAN;
328 return num == 0.0 ? _FPCLASS_PZ : (d < 0 ? _FPCLASS_NN : _FPCLASS_PN);
332 /*********************************************************************
335 unsigned int __cdecl MSVCRT__rotl(unsigned int num, int shift)
338 return (num << shift) | (num >> (32-shift));
341 /*********************************************************************
344 double __cdecl MSVCRT__logb(double num)
346 if (!finite(num)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
350 /*********************************************************************
353 unsigned long __cdecl MSVCRT__lrotl(unsigned long num, int shift)
356 return (num << shift) | (num >> (32-shift));
359 /*********************************************************************
362 unsigned long __cdecl MSVCRT__lrotr(unsigned long num, int shift)
365 return (num >> shift) | (num << (32-shift));
368 /*********************************************************************
371 unsigned int __cdecl MSVCRT__rotr(unsigned int num, int shift)
374 return (num >> shift) | (num << (32-shift));
377 /*********************************************************************
380 double __cdecl MSVCRT__scalb(double num, long power)
382 /* Note - Can't forward directly as libc expects y as double */
383 double dblpower = (double)power;
384 if (!finite(num)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
385 return scalb(num, dblpower);
388 /*********************************************************************
389 * _matherr (MSVCRT.@)
391 int __cdecl MSVCRT__matherr(MSVCRT_exception *e)
394 TRACE("(%p = %d, %s, %g %g %g)\n",e, e->type, e->name, e->arg1, e->arg2,
398 if (MSVCRT_default_matherr_func)
399 return MSVCRT_default_matherr_func(e);
400 ERR(":Unhandled math error!\n");
404 /*********************************************************************
405 * __setusermatherr (MSVCRT.@)
407 void __cdecl MSVCRT___setusermatherr(MSVCRT_matherr_func func)
409 MSVCRT_default_matherr_func = func;
410 TRACE(":new matherr handler %p\n", func);
413 /**********************************************************************
414 * _statusfp (MSVCRT.@)
416 unsigned int __cdecl MSVCRT__statusfp(void)
418 unsigned int retVal = 0;
419 #if defined(__GNUC__) && defined(__i386__)
422 __asm__ __volatile__( "fstsw %0" : "=m" (fpword) : );
423 if (fpword & 0x1) retVal |= _SW_INVALID;
424 if (fpword & 0x2) retVal |= _SW_DENORMAL;
425 if (fpword & 0x4) retVal |= _SW_ZERODIVIDE;
426 if (fpword & 0x8) retVal |= _SW_OVERFLOW;
427 if (fpword & 0x10) retVal |= _SW_UNDERFLOW;
428 if (fpword & 0x20) retVal |= _SW_INEXACT;
430 FIXME(":Not implemented!\n");
435 /*********************************************************************
436 * _clearfp (MSVCRT.@)
438 unsigned int __cdecl MSVCRT__clearfp(void)
440 UINT retVal = MSVCRT__statusfp();
441 #if defined(__GNUC__) && defined(__i386__)
442 __asm__ __volatile__( "fnclex" );
444 FIXME(":Not Implemented\n");
449 /*********************************************************************
452 double __cdecl MSVCRT_ldexp(double num, long exp)
454 double z = ldexp(num,exp);
457 SET_THREAD_VAR(errno,MSVCRT_ERANGE);
458 else if (z == 0 && signbit(z))
459 z = 0.0; /* Convert -0 -> +0 */
463 /*********************************************************************
466 double __cdecl MSVCRT__cabs(MSVCRT_complex num)
468 return sqrt(num.real * num.real + num.imaginary * num.imaginary);
471 /*********************************************************************
472 * _chgsign (MSVCRT.@)
474 double __cdecl MSVCRT__chgsign(double num)
476 /* FIXME: +-infinity,Nan not tested */
480 /*********************************************************************
481 * _control87 (MSVCRT.@)
483 unsigned int __cdecl MSVCRT__control87(unsigned int newval, unsigned int mask)
485 #if defined(__GNUC__) && defined(__i386__)
486 UINT fpword, flags = 0;
488 /* Get fp control word */
489 __asm__ __volatile__( "fstsw %0" : "=m" (fpword) : );
491 /* Convert into mask constants */
492 if (fpword & 0x1) flags |= _EM_INVALID;
493 if (fpword & 0x2) flags |= _EM_DENORMAL;
494 if (fpword & 0x4) flags |= _EM_ZERODIVIDE;
495 if (fpword & 0x8) flags |= _EM_OVERFLOW;
496 if (fpword & 0x10) flags |= _EM_UNDERFLOW;
497 if (fpword & 0x20) flags |= _EM_INEXACT;
498 switch(fpword & 0xC00) {
499 case 0xC00: flags |= _RC_UP|_RC_DOWN; break;
500 case 0x800: flags |= _RC_UP; break;
501 case 0x400: flags |= _RC_DOWN; break;
503 switch(fpword & 0x300) {
504 case 0x0: flags |= _PC_24; break;
505 case 0x200: flags |= _PC_53; break;
506 case 0x300: flags |= _PC_64; break;
508 if (fpword & 0x1000) flags |= _IC_AFFINE;
510 /* Mask with parameters */
511 flags = (flags & ~mask) | (newval & mask);
513 /* Convert (masked) value back to fp word */
515 if (flags & _EM_INVALID) fpword |= 0x1;
516 if (flags & _EM_DENORMAL) fpword |= 0x2;
517 if (flags & _EM_ZERODIVIDE) fpword |= 0x4;
518 if (flags & _EM_OVERFLOW) fpword |= 0x8;
519 if (flags & _EM_UNDERFLOW) fpword |= 0x10;
520 if (flags & _EM_INEXACT) fpword |= 0x20;
521 switch(flags & (_RC_UP | _RC_DOWN)) {
522 case _RC_UP|_RC_DOWN: fpword |= 0xC00; break;
523 case _RC_UP: fpword |= 0x800; break;
524 case _RC_DOWN: fpword |= 0x400; break;
526 switch (flags & (_PC_24 | _PC_53)) {
527 case _PC_64: fpword |= 0x300; break;
528 case _PC_53: fpword |= 0x200; break;
529 case _PC_24: fpword |= 0x0; break;
531 if (!(flags & _IC_AFFINE)) fpword |= 0x1000;
533 /* Put fp control word */
534 __asm__ __volatile__( "fldcw %0" : : "m" (fpword) );
537 return MSVCRT__controlfp( newVal, mask );
541 /*********************************************************************
542 * _controlfp (MSVCRT.@)
544 unsigned int __cdecl MSVCRT__controlfp(unsigned int newval, unsigned int mask)
546 #if defined(__GNUC__) && defined(__i386__)
547 return MSVCRT__control87( newval, mask );
549 FIXME(":Not Implemented!\n");
554 /*********************************************************************
555 * _copysign (MSVCRT.@)
557 double __cdecl MSVCRT__copysign(double num, double sign)
559 /* FIXME: Behaviour for Nan/Inf? */
561 return num < 0.0 ? num : -num;
562 return num < 0.0 ? -num : num;
565 /*********************************************************************
568 int __cdecl MSVCRT__finite(double num)
570 return (finite(num)?1:0); /* See comment for _isnan() */
573 /*********************************************************************
574 * _fpreset (MSVCRT.@)
576 void __cdecl MSVCRT__fpreset(void)
578 #if defined(__GNUC__) && defined(__i386__)
579 __asm__ __volatile__( "fninit" );
581 FIXME(":Not Implemented!\n");
585 /*********************************************************************
588 INT __cdecl MSVCRT__isnan(double num)
590 /* Some implementations return -1 for true(glibc), msvcrt/crtdll return 1.
591 * Do the same, as the result may be used in calculations
593 return isnan(num) ? 1 : 0;
596 /*********************************************************************
599 double __cdecl MSVCRT__y0(double num)
602 if (!finite(num)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
604 if (MSVCRT__fpclass(retval) == _FPCLASS_NINF)
606 SET_THREAD_VAR(errno,MSVCRT_EDOM);
612 /*********************************************************************
615 double __cdecl MSVCRT__y1(double num)
618 if (!finite(num)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
620 if (MSVCRT__fpclass(retval) == _FPCLASS_NINF)
622 SET_THREAD_VAR(errno,MSVCRT_EDOM);
628 /*********************************************************************
631 double __cdecl MSVCRT__yn(int order, double num)
634 if (!finite(num)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
635 retval = yn(order,num);
636 if (MSVCRT__fpclass(retval) == _FPCLASS_NINF)
638 SET_THREAD_VAR(errno,MSVCRT_EDOM);
644 /*********************************************************************
645 * _nextafter (MSVCRT.@)
647 double __cdecl MSVCRT__nextafter(double num, double next)
650 if (!finite(num) || !finite(next)) SET_THREAD_VAR(errno,MSVCRT_EDOM);
651 retval = nextafter(num,next);
655 #include <stdlib.h> /* div_t, ldiv_t */
657 /*********************************************************************
660 * [i386] Windows binary compatible - returns the struct in eax/edx.
663 LONGLONG __cdecl MSVCRT_div(int num, int denom)
666 div_t dt = div(num,denom);
667 retval = ((LONGLONG)dt.rem << 32) | dt.quot;
671 /*********************************************************************
674 * [!i386] Non-x86 can't run win32 apps so we don't need binary compatibility
676 div_t __cdecl MSVCRT_div(int num, int denom)
678 return div(num,denom);
680 #endif /* ifdef __i386__ */
683 /*********************************************************************
686 * [i386] Windows binary compatible - returns the struct in eax/edx.
689 ULONGLONG __cdecl MSVCRT_ldiv(long num, long denom)
692 ldiv_t ldt = ldiv(num,denom);
693 retval = ((ULONGLONG)ldt.rem << 32) | (ULONG)ldt.quot;
697 /*********************************************************************
700 * [!i386] Non-x86 can't run win32 apps so we don't need binary compatibility
702 ldiv_t __cdecl MSVCRT_ldiv(long num, long denom)
704 return ldiv(num,denom);
706 #endif /* ifdef __i386__ */
708 /* I _think_ these functions are intended to work around the pentium fdiv bug */
709 #define DUMMY_FUNC(x) void __cdecl MSVCRT_##x(void) { TRACE("stub"); }
710 DUMMY_FUNC(_adj_fdiv_m16i)
711 DUMMY_FUNC(_adj_fdiv_m32)
712 DUMMY_FUNC(_adj_fdiv_m32i)
713 DUMMY_FUNC(_adj_fdiv_m64)
714 DUMMY_FUNC(_adj_fdiv_r)
715 DUMMY_FUNC(_adj_fdivr_m16i)
716 DUMMY_FUNC(_adj_fdivr_m32)
717 DUMMY_FUNC(_adj_fdivr_m32i)
718 DUMMY_FUNC(_adj_fdivr_m64)
719 DUMMY_FUNC(_adj_fpatan)
720 DUMMY_FUNC(_adj_fprem)
721 DUMMY_FUNC(_adj_fprem1)
722 DUMMY_FUNC(_adj_fptan)
723 DUMMY_FUNC(_adjust_fdiv)
724 DUMMY_FUNC(_safe_fdiv);
725 DUMMY_FUNC(_safe_fdivr);
726 DUMMY_FUNC(_safe_fprem);
727 DUMMY_FUNC(_safe_fprem1);