Added missing math functions

svn path=/trunk/; revision=2040

reactos/lib/msvcrt/math/acos.c

@@ -0,0 +1,26 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double acos (double __x)
+{
+  return atan2 (sqrt (1.0 - __x * __x), __x);
+}

reactos/lib/msvcrt/math/asin.c

@@ -0,0 +1,26 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double asin (double __x)
+{
+  return atan2 (__x, sqrt (1.0 - __x * __x));
+}

reactos/lib/msvcrt/math/atan.c

@@ -0,0 +1,34 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double atan (double __x);
+
+double atan (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fld1\n\t"
+     "fpatan"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/atan2.c

@@ -0,0 +1,15 @@
+
+#include <msvcrt/math.h>
+
+double atan2 (double __y, double __x);
+
+double atan2 (double __y, double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fpatan\n\t"
+     "fld %%st(0)"
+     : "=t" (__value) : "0" (__x), "u" (__y));
+
+  return __value;
+}

reactos/lib/msvcrt/math/cabs.c

@@ -0,0 +1,11 @@
+#include <msvcrt/math.h>
+
+double _cabs( struct _complex z )
+{
+	return sqrt( z.x*z.x + z.y*z.y );
+//	return hypot(z.x,z.y);
+}
+
+
+
+

reactos/lib/msvcrt/math/ceil.c

@@ -0,0 +1,15 @@
+#include <msvcrt/math.h>
+
+double ceil (double __x)
+{
+  register double __value;
+  __volatile unsigned short int __cw, __cwtmp;
+
+  __asm __volatile ("fnstcw %0" : "=m" (__cw));
+  __cwtmp = (__cw & 0xf3ff) | 0x0800; /* rounding up */
+  __asm __volatile ("fldcw %0" : : "m" (__cwtmp));
+  __asm __volatile ("frndint" : "=t" (__value) : "0" (__x));
+  __asm __volatile ("fldcw %0" : : "m" (__cw));
+
+  return __value;
+}

reactos/lib/msvcrt/math/cos.c

@@ -0,0 +1,13 @@
+#include <msvcrt/math.h>
+
+double cos (double __x);
+
+double cos (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fcos"
+     : "=t" (__value): "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/cosh.c

@@ -0,0 +1,8 @@
+/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
+#include <msvcrt/math.h>
+
+double cosh(double x)
+{
+  const double ebig = exp(fabs(x));
+  return (ebig + 1.0/ebig) / 2.0;
+}

reactos/lib/msvcrt/math/exp.c

@@ -0,0 +1,43 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double exp (double __x);
+
+double exp (double __x)
+{
+  register double __value, __exponent;
+  __asm __volatile__
+    ("fldl2e                    # e^x = 2^(x * log2(e))\n\t"
+     "fmul      %%st(1)         # x * log2(e)\n\t"
+     "fst       %%st(1)\n\t"
+     "frndint                   # int(x * log2(e))\n\t"
+     "fxch\n\t"
+     "fsub      %%st(1)         # fract(x * log2(e))\n\t"
+     "f2xm1                     # 2^(fract(x * log2(e))) - 1\n\t"
+     : "=t" (__value), "=u" (__exponent) : "0" (__x));
+  __value += 1.0;
+  __asm __volatile__
+    ("fscale"
+     : "=t" (__value) : "0" (__value), "u" (__exponent));
+
+  return __value;
+}

reactos/lib/msvcrt/math/fabs.c

@@ -0,0 +1,33 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double fabs (double __x);
+
+double fabs (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fabs"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/floor.c

@@ -0,0 +1,37 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double floor (double __x);
+
+double floor (double __x)
+{
+  register double __value;
+  __volatile unsigned short int __cw, __cwtmp;
+
+  __asm __volatile ("fnstcw %0" : "=m" (__cw));
+  __cwtmp = (__cw & 0xf3ff) | 0x0400; /* rounding down */
+  __asm __volatile ("fldcw %0" : : "m" (__cwtmp));
+  __asm __volatile ("frndint" : "=t" (__value) : "0" (__x));
+  __asm __volatile ("fldcw %0" : : "m" (__cw));
+
+  return __value;
+}

reactos/lib/msvcrt/math/fmod.c

@@ -0,0 +1,36 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double fmod (double __x, double __y);
+
+double fmod (double __x, double __y)
+{
+  register double __value;
+  __asm __volatile__
+    ("1:        fprem\n\t"
+     "fstsw     %%ax\n\t"
+     "sahf\n\t"
+     "jp        1b"
+     : "=t" (__value) : "0" (__x), "u" (__y) : "ax", "cc");
+
+  return __value;
+}

reactos/lib/msvcrt/math/frexp.c

@@ -0,0 +1,19 @@
+#include <msvcrt/math.h>
+#include <msvcrt/stdlib.h>
+#include <msvcrt/internal/ieee.h>
+
+double
+frexp(double __x, int *exptr)
+{
+  double_t *x = (double_t *)&__x;
+
+  if (exptr != NULL)
+    *exptr = x->exponent - 0x3FE;
+
+  x->exponent = 0x3FE;
+
+  return __x;
+}
+
+
+

reactos/lib/msvcrt/math/ftol.c

@@ -0,0 +1,6 @@
+#include <msvcrt/float.h>
+
+long _ftol(double fl)
+{
+  return (long)fl;
+}

reactos/lib/msvcrt/math/huge_val.c

@@ -0,0 +1,6 @@
+/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
+
+#include <msvcrt/internal/ieee.h>
+
+#undef _HUGE
+double_t _HUGE = { 0x00000, 0x00000, 0x7ff, 0x0 };

reactos/lib/msvcrt/math/hypot.c

@@ -0,0 +1,98 @@
+/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
+/*
+ * hypot() function for DJGPP.
+ *
+ * hypot() computes sqrt(x^2 + y^2).  The problem with the obvious
+ * naive implementation is that it might fail for very large or
+ * very small arguments.  For instance, for large x or y the result
+ * might overflow even if the value of the function should not,
+ * because squaring a large number might trigger an overflow.  For
+ * very small numbers, their square might underflow and will be
+ * silently replaced by zero; this won't cause an exception, but might
+ * have an adverse effect on the accuracy of the result.
+ *
+ * This implementation tries to avoid the above pitfals, without
+ * inflicting too much of a performance hit.
+ *
+ */
+ 
+#include <msvcrt/float.h>
+#include <msvcrt/math.h>
+#include <msvcrt/errno.h>
+ 
+/* Approximate square roots of DBL_MAX and DBL_MIN.  Numbers
+   between these two shouldn't neither overflow nor underflow
+   when squared.  */
+#define __SQRT_DBL_MAX 1.3e+154
+#define __SQRT_DBL_MIN 2.3e-162
+ 
+double
+_hypot(double x, double y)
+{
+  double abig = fabs(x), asmall = fabs(y);
+  double ratio;
+ 
+  /* Make abig = max(|x|, |y|), asmall = min(|x|, |y|).  */
+  if (abig < asmall)
+    {
+      double temp = abig;
+ 
+      abig = asmall;
+      asmall = temp;
+    }
+ 
+  /* Trivial case.  */
+  if (asmall == 0.)
+    return abig;
+ 
+  /* Scale the numbers as much as possible by using its ratio.
+     For example, if both ABIG and ASMALL are VERY small, then
+     X^2 + Y^2 might be VERY inaccurate due to loss of
+     significant digits.  Dividing ASMALL by ABIG scales them
+     to a certain degree, so that accuracy is better.  */
+ 
+  if ((ratio = asmall / abig) > __SQRT_DBL_MIN && abig < __SQRT_DBL_MAX)
+    return abig * sqrt(1.0 + ratio*ratio);
+  else
+    {
+      /* Slower but safer algorithm due to Moler and Morrison.  Never
+         produces any intermediate result greater than roughly the
+         larger of X and Y.  Should converge to machine-precision
+         accuracy in 3 iterations.  */
+ 
+      double r = ratio*ratio, t, s, p = abig, q = asmall;
+ 
+      do {
+        t = 4. + r;
+        if (t == 4.)
+          break;
+        s = r / t;
+        p += 2. * s * p;
+        q *= s;
+        r = (q / p) * (q / p);
+      } while (1);
+ 
+      return p;
+    }
+}
+ 
+#ifdef  TEST
+ 
+#include <crtdll/stdio.h>
+ 
+int
+main(void)
+{
+  printf("hypot(3, 4) =\t\t\t %25.17e\n", _hypot(3., 4.));
+  printf("hypot(3*10^150, 4*10^150) =\t %25.17g\n", _hypot(3.e+150, 4.e+150));
+  printf("hypot(3*10^306, 4*10^306) =\t %25.17g\n", _hypot(3.e+306, 4.e+306));
+  printf("hypot(3*10^-320, 4*10^-320) =\t %25.17g\n",_hypot(3.e-320, 4.e-320));
+  printf("hypot(0.7*DBL_MAX, 0.7*DBL_MAX) =%25.17g\n",_hypot(0.7*DBL_MAX, 0.7*DBL_MAX));
+  printf("hypot(DBL_MAX, 1.0) =\t\t %25.17g\n", _hypot(DBL_MAX, 1.0));
+  printf("hypot(1.0, DBL_MAX) =\t\t %25.17g\n", _hypot(1.0, DBL_MAX));
+  printf("hypot(0.0, DBL_MAX) =\t\t %25.17g\n", _hypot(0.0, DBL_MAX));
+ 
+  return 0;
+}
+ 
+#endif

reactos/lib/msvcrt/math/j0_y0.c

@@ -0,0 +1,11 @@
+#include <msvcrt/math.h>
+
+double _j0(double x)
+{
+  return x;
+}
+
+double _y0(double x)
+{
+  return x;
+}

reactos/lib/msvcrt/math/j1_y1.c

@@ -0,0 +1,11 @@
+#include <msvcrt/math.h>
+
+double _j1(double x)
+{
+  return x;
+}
+
+double _y1(double x)
+{
+  return x;
+}

reactos/lib/msvcrt/math/jn_yn.c

@@ -0,0 +1,11 @@
+#include <crtdll/math.h>
+
+double _jn(int n, double x)
+{
+	return x;
+}
+
+double _yn(int n, double x) 
+{
+	return x;
+}

reactos/lib/msvcrt/math/ldexp.c

@@ -0,0 +1,33 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double ldexp (double __x, int __y);
+
+double ldexp (double __x, int __y)
+{
+  register double __value;
+  __asm __volatile__
+    ("fscale"
+     : "=t" (__value) : "0" (__x), "u" ((double) __y));
+
+  return __value;
+}

reactos/lib/msvcrt/math/log.c

@@ -0,0 +1,35 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double log (double __x);
+
+double log (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fldln2\n\t"
+     "fxch\n\t"
+     "fyl2x"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/log10.c

@@ -0,0 +1,35 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double log10 (double __x);
+
+double log10 (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fldlg2\n\t"
+     "fxch\n\t"
+     "fyl2x"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/pow.c

@@ -18,6 +18,8 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <msvcrt/math.h>
+
 double pow (double __x, double __y);
 
 double __log2 (double __x);
@@ -78,9 +80,7 @@ double pow (double __x, double __y)
   return __value;
 }
 
-
 long double powl (long double __x,long double __y)
 {
 	return pow(__x,__y/2)*pow(__x,__y/2);
 }
-

reactos/lib/msvcrt/math/sin.c

@@ -0,0 +1,33 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double sin (double __x);
+
+double sin (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fsin"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/sinh.c

@@ -0,0 +1,16 @@
+/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
+#include <msvcrt/math.h>
+
+double sinh(double x)
+{
+ if(x >= 0.0)
+ {
+   const double epos = exp(x);
+   return (epos - 1.0/epos) / 2.0;
+ }
+ else
+ {
+   const double eneg = exp(-x);
+   return (1.0/eneg - eneg) / 2.0;
+ }
+}

reactos/lib/msvcrt/math/sqrt.c

@@ -0,0 +1,32 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+#include <msvcrt/math.h>
+
+double sqrt (double __x);
+
+double sqrt (double __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fsqrt"
+     : "=t" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/stubs.c

@@ -0,0 +1,84 @@
+#include <msvcrt/math.h>
+
+double	_CIsin (double x);
+double	_CIcos (double x);
+double	_CItan (double x);
+double	_CIsinh (double x);
+double	_CIcosh (double x);
+double	_CItanh (double x);
+double	_CIasin (double x);
+double	_CIacos (double x);
+double	_CIatan (double x);
+double	_CIatan2 (double y, double x);
+double	_CIexp (double x);
+double	_CIlog (double x);
+double	_CIlog10 (double x);
+double	_CIpow (double x, double y);
+double	_CIsqrt (double x);
+double	_CIfmod (double x, double y);
+
+
+double	_CIsin (double x)
+{
+	return sin(x);
+}
+double	_CIcos (double x)
+{
+	return cos(x);
+}
+double	_CItan (double x)
+{
+	return tan(x);
+}
+double	_CIsinh (double x)
+{
+	return sinh(x);
+}
+double	_CIcosh (double x)
+{
+	return cosh(x);
+}
+double	_CItanh (double x)
+{
+	return tanh(x);
+}
+double	_CIasin (double x)
+{
+	return asin(x);
+}
+double	_CIacos (double x)
+{
+	return acos(x);
+}
+double	_CIatan (double x)
+{
+	return atan(x);
+}
+double	_CIatan2 (double y, double x)
+{
+	return atan2(y,x);
+}
+double	_CIexp (double x)
+{
+	return exp(x);
+}
+double	_CIlog (double x)
+{
+	return log(x);
+}
+double	_CIlog10 (double x)
+{
+	return log10(x);
+}
+double	_CIpow (double x, double y)
+{
+	return pow(x,y);
+}
+double	_CIsqrt (double x)
+{
+	return sqrt(x);
+}
+double	_CIfmod (double x, double y)
+{
+	return fmod(x,y);
+}

reactos/lib/msvcrt/math/tan.c

@@ -0,0 +1,34 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <[email protected]>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <msvcrt/math.h>
+
+double tan (double __x);
+
+double tan (double __x)
+{
+  register double __value;
+  register double __value2 __attribute__ ((unused));
+  __asm __volatile__
+    ("fptan"
+     : "=t" (__value2), "=u" (__value) : "0" (__x));
+
+  return __value;
+}

reactos/lib/msvcrt/math/tanh.c

@@ -0,0 +1,17 @@
+/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
+
+#include <msvcrt/math.h>
+
+double tanh(double x)
+{
+  if (x > 50)
+    return 1;
+  else if (x < -50)
+    return -1;
+  else
+  {
+    const double ebig = exp(x);
+    const double esmall = 1.0/ebig;
+    return (ebig - esmall) / (ebig + esmall);
+  }
+}