* mingwex/math/lgamma.c: New file.

	* mingwex/math/lgammaf.c: New file.
	* mingwex/math/lgammal.c: New file.
	* mingwex/math/tgamma.c: New file.
	* mingwex/math/tgammaf.c: New file.
	* mingwex/math/tgammal.c: New file.
	* mingwex/math/cephes_mconf (polevlf): Add float version.
	(p1evlf): Likewise.
	Define _CEPHES_USE_ERRNO.
	* mingwex/Makefile.in (MATH_DISTFILES): Add new files.
	(MATH_OBJS): Add new objects.
	* include/math.h (lgamma[fl]): Add prototypes.
	(tgamma[fl]): Add prototypes.

9 files changed, 2300 insertions, 5 deletions

diff --git a/winsup/mingw/include/math.h b/winsup/mingw/include/math.h
index fbfd712..93dcb5f 100644
--- a/winsup/mingw/include/math.h
+++ b/winsup/mingw/include/math.h
@@ -501,7 +501,21 @@ extern long double powl (long double, long double);
 extern float sqrtf (float);
 extern long double sqrtl (long double);
 
-/* 7.12.8 Error and gamma functions: TODO */
+/* TODO */ 
+/* 7.12.8.1 The erf functions  */
+/* 7.12.8.2 The erfc functions  */
+
+/* 7.12.8.3 The lgamma functions */
+
+extern double lgamma (double);
+extern float lgammaf (float);
+extern long double lgammal (long double);
+
+/* 77.12.8.4 The tgamma functions */
+
+extern double tgamma (double);
+extern float tgammaf (float);
+extern long double tgammal (long double);
 
 /* 7.12.9.1 Double in C89 */
 extern float ceilf (float);
diff --git a/winsup/mingw/mingwex/Makefile.in b/winsup/mingw/mingwex/Makefile.in
index 3186137..c38ada0 100644
--- a/winsup/mingw/mingwex/Makefile.in
+++ b/winsup/mingw/mingwex/Makefile.in
@@ -46,7 +46,8 @@ MATH_DISTFILES = \
 	fmodl.c fp_consts.c fp_consts.h fp_constsf.c  fp_constsl.c \
 	fpclassify.c fpclassifyf.c fpclassifyl.c \
 	frexpf.c frexpl.S fucom.c hypotf.c hypotl.c ilogb.S ilogbf.S \
-	ilogbl.S isnan.c isnanf.c isnanl.c ldexpf.c ldexpl.c llrint.c \
+	ilogbl.S isnan.c isnanf.c isnanl.c ldexpf.c ldexpl.c \
+	lgamma.c lgammaf.c lgammal.c llrint.c \
 	llrintf.c llrintl.c llround.c llroundf.c llroundl.c \
 	log10f.S log10l.S log1p.S log1pf.S log1pl.S log2.S log2f.S \
 	log2l.S logb.c logbf.c logbl.c logf.S logl.S lrint.c lrintf.c \
@@ -57,7 +58,8 @@ MATH_DISTFILES = \
 	remquof.S remquol.S rint.c rintf.c rintl.c round.c roundf.c \
 	roundl.c scalbn.S scalbnf.S scalbnl.S signbit.c signbitf.c \
 	signbitl.c sinf.S sinhf.c sinhl.c sinl.S  sqrtf.c sqrtl.c \
-	tanf.S tanhf.c tanhl.c tanl.S trunc.c truncf.c truncl.c
+	tanf.S tanhf.c tanhl.c tanl.S tgamma.c tgammaf.c tgammal.c \
+	trunc.c truncf.c truncl.c
 
 CC = @CC@
 # FIXME: Which is it, CC or CC_FOR_TARGET?
@@ -115,7 +117,8 @@ MATH_OBJS = \
 	fmodl.o fp_consts.o fp_constsf.o fp_constsl.o \
 	fpclassify.o fpclassifyf.o fpclassifyl.o \
 	frexpf.o frexpl.o fucom.o hypotf.o hypotl.o ilogb.o ilogbf.o \
-	ilogbl.o isnan.o isnanf.o isnanl.o ldexpf.o ldexpl.o llrint.o \
+	ilogbl.o isnan.o isnanf.o isnanl.o ldexpf.o ldexpl.o \
+	lgamma.o lgammaf.o lgammal.o llrint.o \
 	llrintf.o llrintl.o llround.o llroundf.o llroundl.o \
 	log10f.o log10l.o log1p.o log1pf.o log1pl.o log2.o log2f.o \
 	log2l.o logb.o logbf.o logbl.o logf.o logl.o lrint.o lrintf.o \
@@ -126,7 +129,8 @@ MATH_OBJS = \
 	remquof.o remquol.o rint.o rintf.o rintl.o round.o roundf.o \
 	roundl.o scalbn.o scalbnf.o scalbnl.o signbit.o signbitf.o \
 	signbitl.o sinf.o sinhf.o sinhl.o sinl.o sqrtf.o sqrtl.o \
-	tanf.o tanhf.o tanhl.o tanl.o trunc.o truncf.o truncl.o
+	tanf.o tanhf.o tanhl.o tanl.o tgamma.o tgammaf.o tgammal.o \
+	trunc.o truncf.o truncl.o
 FENV_OBJS = fesetround.o  fegetround.o \
 	fegetenv.o fesetenv.o feupdateenv.o \
 	feclearexcept.o feholdexcept.o fegetexceptflag.o \
diff --git a/winsup/mingw/mingwex/math/cephes_mconf.h b/winsup/mingw/mingwex/math/cephes_mconf.h
index 1dda63d..85e0bdc 100644
--- a/winsup/mingw/mingwex/math/cephes_mconf.h
+++ b/winsup/mingw/mingwex/math/cephes_mconf.h
@@ -12,6 +12,8 @@
 #define mtherr(fname, code) 
 #define XPD 0,
 
+#define _CEPHES_USE_ERRNO
+
 #ifdef _CEPHES_USE_ERRNO
 #define _SET_ERRNO(x) errno = (x)
 #else
@@ -275,3 +277,99 @@ while( --n );
 return( y );
 }
 
+/* Float version */
+
+/*							polevlf.c
+ *							p1evlf.c
+ *
+ *	Evaluate polynomial
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * int N;
+ * float x, y, coef[N+1], polevlf[];
+ *
+ * y = polevlf( x, coef, N );
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Evaluates polynomial of degree N:
+ *
+ *                     2          N
+ * y  =  C  + C x + C x  +...+ C x
+ *        0    1     2          N
+ *
+ * Coefficients are stored in reverse order:
+ *
+ * coef[0] = C  , ..., coef[N] = C  .
+ *            N                   0
+ *
+ *  The function p1evl() assumes that coef[N] = 1.0 and is
+ * omitted from the array.  Its calling arguments are
+ * otherwise the same as polevl().
+ *
+ *
+ * SPEED:
+ *
+ * In the interest of speed, there are no checks for out
+ * of bounds arithmetic.  This routine is used by most of
+ * the functions in the library.  Depending on available
+ * equipment features, the user may wish to rewrite the
+ * program in microcode or assembly language.
+ *
+ */
+
+/*
+Cephes Math Library Release 2.1:  December, 1988
+Copyright 1984, 1987, 1988 by Stephen L. Moshier
+Direct inquiries to 30 Frost Street, Cambridge, MA 02140
+*/
+
+static __inline__ float polevlf(float x, const float* coef, int N )
+{
+float ans;
+float *p;
+int i;
+
+p = (float*)coef;
+ans = *p++;
+
+/*
+for( i=0; i<N; i++ )
+	ans = ans * x  +  *p++;
+*/
+
+i = N;
+do
+	ans = ans * x  +  *p++;
+while( --i );
+
+return( ans );
+}
+
+/*							p1evl()	*/
+/*                                          N
+ * Evaluate polynomial when coefficient of x  is 1.0.
+ * Otherwise same as polevl.
+ */
+
+static __inline__ float p1evlf( float x, const float *coef, int N )
+{
+float ans;
+float *p;
+int i;
+
+p = (float*)coef;
+ans = x + *p++;
+i = N-1;
+
+do
+	ans = ans * x  + *p++;
+while( --i );
+
+return( ans );
+}
diff --git a/winsup/mingw/mingwex/math/lgamma.c b/winsup/mingw/mingwex/math/lgamma.c
new file mode 100644
index 0000000..f850949
--- /dev/null
+++ b/winsup/mingw/mingwex/math/lgamma.c
@@ -0,0 +1,359 @@
+/*							lgam()
+ *
+ *	Natural logarithm of gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * double x, y, __lgamma_r();
+ * int* sgngam;
+ * y = __lgamma_r( x, sgngam );
+ * 
+ * double x, y, lgamma();
+ * y = lgamma( x);
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns the base e (2.718...) logarithm of the absolute
+ * value of the gamma function of the argument. In the reentrant
+ * version, the sign (+1 or -1) of the gamma function is returned
+ * in the variable referenced by sgngam.
+ *
+ * For arguments greater than 13, the logarithm of the gamma
+ * function is approximated by the logarithmic version of
+ * Stirling's formula using a polynomial approximation of
+ * degree 4. Arguments between -33 and +33 are reduced by
+ * recurrence to the interval [2,3] of a rational approximation.
+ * The cosecant reflection formula is employed for arguments
+ * less than -33.
+ *
+ * Arguments greater than MAXLGM return MAXNUM and an error
+ * message.  MAXLGM = 2.035093e36 for DEC
+ * arithmetic or 2.556348e305 for IEEE arithmetic.
+ *
+ *
+ *
+ * ACCURACY:
+ *
+ *
+ * arithmetic      domain        # trials     peak         rms
+ *    DEC     0, 3                  7000     5.2e-17     1.3e-17
+ *    DEC     2.718, 2.035e36       5000     3.9e-17     9.9e-18
+ *    IEEE    0, 3                 28000     5.4e-16     1.1e-16
+ *    IEEE    2.718, 2.556e305     40000     3.5e-16     8.3e-17
+ * The error criterion was relative when the function magnitude
+ * was greater than one but absolute when it was less than one.
+ *
+ * The following test used the relative error criterion, though
+ * at certain points the relative error could be much higher than
+ * indicated.
+ *    IEEE    -200, -4             10000     4.8e-16     1.3e-16
+ *
+ */
+
+/*
+ * Cephes Math Library Release 2.8:  June, 2000
+ * Copyright 1984, 1987, 1989, 1992, 2000 by Stephen L. Moshier
+ */
+
+/*
+ * 26-11-2002 Modified for mingw.
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ */
+
+
+#ifndef __MINGW32__
+#include "mconf.h"
+#ifdef ANSIPROT
+extern double pow ( double, double );
+extern double log ( double );
+extern double exp ( double );
+extern double sin ( double );
+extern double polevl ( double, void *, int );
+extern double p1evl ( double, void *, int );
+extern double floor ( double );
+extern double fabs ( double );
+extern int isnan ( double );
+extern int isfinite ( double );
+#else
+double pow(), log(), exp(), sin(), polevl(), p1evl(), floor(), fabs();
+int isnan(), isfinite();
+#endif
+#ifdef INFINITIES
+extern double INFINITY;
+#endif
+#ifdef NANS
+extern double NAN;
+#endif
+#else /* __MINGW32__ */
+#include "cephes_mconf.h"
+#endif /* __MINGW32__ */
+
+
+/* A[]: Stirling's formula expansion of log gamma
+ * B[], C[]: log gamma function between 2 and 3
+ */
+#ifdef UNK
+static double A[] = {
+ 8.11614167470508450300E-4,
+-5.95061904284301438324E-4,
+ 7.93650340457716943945E-4,
+-2.77777777730099687205E-3,
+ 8.33333333333331927722E-2
+};
+static double B[] = {
+-1.37825152569120859100E3,
+-3.88016315134637840924E4,
+-3.31612992738871184744E5,
+-1.16237097492762307383E6,
+-1.72173700820839662146E6,
+-8.53555664245765465627E5
+};
+static double C[] = {
+/* 1.00000000000000000000E0, */
+-3.51815701436523470549E2,
+-1.70642106651881159223E4,
+-2.20528590553854454839E5,
+-1.13933444367982507207E6,
+-2.53252307177582951285E6,
+-2.01889141433532773231E6
+};
+/* log( sqrt( 2*pi ) ) */
+static double LS2PI  =  0.91893853320467274178;
+#define MAXLGM 2.556348e305
+static double LOGPI = 1.14472988584940017414;
+#endif
+
+#ifdef DEC
+static const unsigned short A[] = {
+0035524,0141201,0034633,0031405,
+0135433,0176755,0126007,0045030,
+0035520,0006371,0003342,0172730,
+0136066,0005540,0132605,0026407,
+0037252,0125252,0125252,0125132
+};
+static const unsigned short B[] = {
+0142654,0044014,0077633,0035410,
+0144027,0110641,0125335,0144760,
+0144641,0165637,0142204,0047447,
+0145215,0162027,0146246,0155211,
+0145322,0026110,0010317,0110130,
+0145120,0061472,0120300,0025363
+};
+static const unsigned short C[] = {
+/*0040200,0000000,0000000,0000000*/
+0142257,0164150,0163630,0112622,
+0143605,0050153,0156116,0135272,
+0144527,0056045,0145642,0062332,
+0145213,0012063,0106250,0001025,
+0145432,0111254,0044577,0115142,
+0145366,0071133,0050217,0005122
+};
+/* log( sqrt( 2*pi ) ) */
+static const unsigned short LS2P[] = {040153,037616,041445,0172645,};
+#define LS2PI *(double *)LS2P
+#define MAXLGM 2.035093e36
+static const unsigned short LPI[4] = {
+0040222,0103202,0043475,0006750,
+};
+#define LOGPI *(double *)LPI
+
+#endif
+
+#ifdef IBMPC
+static const unsigned short A[] = {
+0x6661,0x2733,0x9850,0x3f4a,
+0xe943,0xb580,0x7fbd,0xbf43,
+0x5ebb,0x20dc,0x019f,0x3f4a,
+0xa5a1,0x16b0,0xc16c,0xbf66,
+0x554b,0x5555,0x5555,0x3fb5
+};
+static const unsigned short B[] = {
+0x6761,0x8ff3,0x8901,0xc095,
+0xb93e,0x355b,0xf234,0xc0e2,
+0x89e5,0xf890,0x3d73,0xc114,
+0xdb51,0xf994,0xbc82,0xc131,
+0xf20b,0x0219,0x4589,0xc13a,
+0x055e,0x5418,0x0c67,0xc12a
+};
+static const unsigned short C[] = {
+/*0x0000,0x0000,0x0000,0x3ff0,*/
+0x12b2,0x1cf3,0xfd0d,0xc075,
+0xd757,0x7b89,0xaa0d,0xc0d0,
+0x4c9b,0xb974,0xeb84,0xc10a,
+0x0043,0x7195,0x6286,0xc131,
+0xf34c,0x892f,0x5255,0xc143,
+0xe14a,0x6a11,0xce4b,0xc13e
+};
+/* log( sqrt( 2*pi ) ) */
+static const unsigned short LS2P[] = {
+0xbeb5,0xc864,0x67f1,0x3fed
+};
+#define LS2PI *(double *)LS2P
+#define MAXLGM 2.556348e305
+static const unsigned short LPI[4] = {
+0xa1bd,0x48e7,0x50d0,0x3ff2,
+};
+#define LOGPI *(double *)LPI
+#endif
+
+#ifdef MIEEE
+static const unsigned short A[] = {
+0x3f4a,0x9850,0x2733,0x6661,
+0xbf43,0x7fbd,0xb580,0xe943,
+0x3f4a,0x019f,0x20dc,0x5ebb,
+0xbf66,0xc16c,0x16b0,0xa5a1,
+0x3fb5,0x5555,0x5555,0x554b
+};
+static const unsigned short B[] = {
+0xc095,0x8901,0x8ff3,0x6761,
+0xc0e2,0xf234,0x355b,0xb93e,
+0xc114,0x3d73,0xf890,0x89e5,
+0xc131,0xbc82,0xf994,0xdb51,
+0xc13a,0x4589,0x0219,0xf20b,
+0xc12a,0x0c67,0x5418,0x055e
+};
+static const unsigned short C[] = {
+0xc075,0xfd0d,0x1cf3,0x12b2,
+0xc0d0,0xaa0d,0x7b89,0xd757,
+0xc10a,0xeb84,0xb974,0x4c9b,
+0xc131,0x6286,0x7195,0x0043,
+0xc143,0x5255,0x892f,0xf34c,
+0xc13e,0xce4b,0x6a11,0xe14a
+};
+/* log( sqrt( 2*pi ) ) */
+static const unsigned short LS2P[] = {
+0x3fed,0x67f1,0xc864,0xbeb5
+};
+#define LS2PI *(double *)LS2P
+#define MAXLGM 2.556348e305
+static unsigned short LPI[4] = {
+0x3ff2,0x50d0,0x48e7,0xa1bd,
+};
+#define LOGPI *(double *)LPI
+#endif
+
+
+/* Logarithm of gamma function */
+/* Reentrant version */ 
+
+double __lgamma_r(double x, int* sgngam)
+{
+double p, q, u, w, z;
+int i;
+
+*sgngam = 1;
+#ifdef NANS
+if( isnan(x) )
+	return(x);
+#endif
+
+#ifdef INFINITIES
+if( !isfinite(x) )
+	return(INFINITY);
+#endif
+
+if( x < -34.0 )
+	{
+	q = -x;
+	w = __lgamma_r(q, sgngam); /* note this modifies sgngam! */
+	p = floor(q);
+	if( p == q )
+		{
+lgsing:
+		_SET_ERRNO(EDOM);
+		mtherr( "lgam", SING );
+#ifdef INFINITIES
+		return (INFINITY);
+#else
+		return (MAXNUM);
+#endif
+		}
+	i = p;
+	if( (i & 1) == 0 )
+		*sgngam = -1;
+	else
+		*sgngam = 1;
+	z = q - p;
+	if( z > 0.5 )
+		{
+		p += 1.0;
+		z = p - q;
+		}
+	z = q * sin( PI * z );
+	if( z == 0.0 )
+		goto lgsing;
+/*	z = log(PI) - log( z ) - w;*/
+	z = LOGPI - log( z ) - w;
+	return( z );
+	}
+
+if( x < 13.0 )
+	{
+	z = 1.0;
+	p = 0.0;
+	u = x;
+	while( u >= 3.0 )
+		{
+		p -= 1.0;
+		u = x + p;
+		z *= u;
+		}
+	while( u < 2.0 )
+		{
+		if( u == 0.0 )
+			goto lgsing;
+		z /= u;
+		p += 1.0;
+		u = x + p;
+		}
+	if( z < 0.0 )
+		{
+		*sgngam = -1;
+		z = -z;
+		}
+	else
+		*sgngam = 1;
+	if( u == 2.0 )
+		return( log(z) );
+	p -= 2.0;
+	x = x + p;
+	p = x * polevl( x, B, 5 ) / p1evl( x, C, 6);
+	return( log(z) + p );
+	}
+
+if( x > MAXLGM )
+	{
+	_SET_ERRNO(ERANGE);
+	mtherr( "lgamma", OVERFLOW );
+#ifdef INFINITIES
+	return( *sgngam * INFINITY );
+#else
+	return( *sgngam * MAXNUM );
+#endif
+	}
+
+q = ( x - 0.5 ) * log(x) - x + LS2PI;
+if( x > 1.0e8 )
+	return( q );
+
+p = 1.0/(x*x);
+if( x >= 1000.0 )
+	q += ((   7.9365079365079365079365e-4 * p
+		- 2.7777777777777777777778e-3) *p
+		+ 0.0833333333333333333333) / x;
+else
+	q += polevl( p, A, 4 ) / x;
+return( q );
+}
+
+/* This is the C99 version */
+
+double lgamma(double x)
+{
+  int local_sgngam=0;
+  return (__lgamma_r(x, &local_sgngam));
+}
diff --git a/winsup/mingw/mingwex/math/lgammaf.c b/winsup/mingw/mingwex/math/lgammaf.c
new file mode 100644
index 0000000..20982f9
--- /dev/null
+++ b/winsup/mingw/mingwex/math/lgammaf.c
@@ -0,0 +1,253 @@
+/*							lgamf()
+ *
+ *	Natural logarithm of gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * float x, y, __lgammaf_r();
+ * int* sgngamf;
+ * y = __lgammaf_r( x, sgngamf );
+ * 
+ * float x, y, lgammaf();
+ * y = lgammaf( x);
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns the base e (2.718...) logarithm of the absolute
+ * value of the gamma function of the argument. In the reentrant
+ * version the sign (+1 or -1) of the gamma function is returned in
+ * variable referenced by sgngamf.
+ *
+ * For arguments greater than 6.5, the logarithm of the gamma
+ * function is approximated by the logarithmic version of
+ * Stirling's formula.  Arguments between 0 and +6.5 are reduced by
+ * by recurrence to the interval [.75,1.25] or [1.5,2.5] of a rational
+ * approximation.  The cosecant reflection formula is employed for
+ * arguments less than zero.
+ *
+ * Arguments greater than MAXLGM = 2.035093e36 return MAXNUM and an
+ * error message.
+ *
+ *
+ *
+ * ACCURACY:
+ *
+ *
+ *
+ * arithmetic      domain        # trials     peak         rms
+ *    IEEE        -100,+100       500,000    7.4e-7       6.8e-8
+ * The error criterion was relative when the function magnitude
+ * was greater than one but absolute when it was less than one.
+ * The routine has low relative error for positive arguments.
+ *
+ * The following test used the relative error criterion.
+ *    IEEE    -2, +3              100000     4.0e-7      5.6e-8
+ *
+ */
+
+
+/*
+  Cephes Math Library Release 2.7:  July, 1998
+  Copyright 1984, 1987, 1989, 1992, 1998 by Stephen L. Moshier
+*/
+
+/*
+  26-11-2002 Modified for mingw.
+  Danny Smith <dannysmith@users.sourceforge.net>
+*/
+
+
+/* log gamma(x+2), -.5 < x < .5 */
+static const float B[] = {
+ 6.055172732649237E-004,
+-1.311620815545743E-003,
+ 2.863437556468661E-003,
+-7.366775108654962E-003,
+ 2.058355474821512E-002,
+-6.735323259371034E-002,
+ 3.224669577325661E-001,
+ 4.227843421859038E-001
+};
+
+/* log gamma(x+1), -.25 < x < .25 */
+static const float C[] = {
+ 1.369488127325832E-001,
+-1.590086327657347E-001,
+ 1.692415923504637E-001,
+-2.067882815621965E-001,
+ 2.705806208275915E-001,
+-4.006931650563372E-001,
+ 8.224670749082976E-001,
+-5.772156501719101E-001
+};
+
+/* log( sqrt( 2*pi ) ) */
+static const float LS2PI  =  0.91893853320467274178;
+#define MAXLGM 2.035093e36
+static const float PIINV =  0.318309886183790671538;
+
+#ifndef __MINGW32__
+#include "mconf.h"
+float floorf(float);
+float polevlf( float, float *, int );
+float p1evlf( float, float *, int );
+#else
+#include "cephes_mconf.h"
+#endif
+
+/* Reentrant version */ 
+/* Logarithm of gamma function */
+
+float __lgammaf_r( float x, int* sgngamf )
+{
+float p, q, w, z;
+float nx, tx;
+int i, direction;
+
+*sgngamf = 1;
+#ifdef NANS
+if( isnan(x) )
+	return(x);
+#endif
+
+#ifdef INFINITIES
+if( !isfinite(x) )
+	return(x);
+#endif
+
+
+if( x < 0.0 )
+	{
+	q = -x;
+	w = __lgammaf_r(q, sgngamf); /* note this modifies sgngam! */
+	p = floorf(q);
+	if( p == q )
+		{
+lgsing:
+		_SET_ERRNO(EDOM);
+		mtherr( "lgamf", SING );
+#ifdef INFINITIES
+		return (INFINITYF);
+#else
+	return( *sgngamf * MAXNUMF );
+#endif
+		}
+	i = p;
+	if( (i & 1) == 0 )
+		*sgngamf = -1;
+	else
+		*sgngamf = 1;
+	z = q - p;
+	if( z > 0.5 )
+		{
+		p += 1.0;
+		z = p - q;
+		}
+	z = q * sinf( PIF * z );
+	if( z == 0.0 )
+		goto lgsing;
+	z = -logf( PIINV*z ) - w;
+	return( z );
+	}
+
+if( x < 6.5 )
+	{
+	direction = 0;
+	z = 1.0;
+	tx = x;
+	nx = 0.0;
+	if( x >= 1.5 )
+		{
+		while( tx > 2.5 )
+			{
+			nx -= 1.0;
+			tx = x + nx;
+			z *=tx;
+			}
+		x += nx - 2.0;
+iv1r5:
+		p = x * polevlf( x, B, 7 );
+		goto cont;
+		}
+	if( x >= 1.25 )
+		{
+		z *= x;
+		x -= 1.0; /* x + 1 - 2 */
+		direction = 1;
+		goto iv1r5;
+		}
+	if( x >= 0.75 )
+		{
+		x -= 1.0;
+		p = x * polevlf( x, C, 7 );
+		q = 0.0;
+		goto contz;
+		}
+	while( tx < 1.5 )
+		{
+		if( tx == 0.0 )
+			goto lgsing;
+		z *=tx;
+		nx += 1.0;
+		tx = x + nx;
+		}
+	direction = 1;
+	x += nx - 2.0;
+	p = x * polevlf( x, B, 7 );
+
+cont:
+	if( z < 0.0 )
+		{
+		*sgngamf = -1;
+		z = -z;
+		}
+	else
+		{
+		*sgngamf = 1;
+		}
+	q = logf(z);
+	if( direction )
+		q = -q;
+contz:
+	return( p + q );
+	}
+
+if( x > MAXLGM )
+	{
+	_SET_ERRNO(ERANGE);
+	mtherr( "lgamf", OVERFLOW );
+#ifdef INFINITIES
+	return( *sgngamf * INFINITYF );
+#else
+	return( *sgngamf * MAXNUMF );
+#endif
+
+	}
+
+/* Note, though an asymptotic formula could be used for x >= 3,
+ * there is cancellation error in the following if x < 6.5.  */
+q = LS2PI - x;
+q += ( x - 0.5 ) * logf(x);
+
+if( x <= 1.0e4 )
+	{
+	z = 1.0/x;
+	p = z * z;
+	q += ((    6.789774945028216E-004 * p
+		 - 2.769887652139868E-003 ) * p
+		+  8.333316229807355E-002 ) * z;
+	}
+return( q );
+}
+
+/* This is the C99 version */
+
+float lgammaf(float x)
+{
+  int local_sgngamf=0;
+  return (__lgammaf_r(x, &local_sgngamf));
+}
diff --git a/winsup/mingw/mingwex/math/lgammal.c b/winsup/mingw/mingwex/math/lgammal.c
new file mode 100644
index 0000000..d2b306a
--- /dev/null
+++ b/winsup/mingw/mingwex/math/lgammal.c
@@ -0,0 +1,416 @@
+/*							lgaml()
+ *
+ *	Natural logarithm of gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * long double x, y, __lgammal_r();
+ * int* sgngaml;
+ * y = __lgammal_r( x, sgngaml );
+ * 
+ * long double x, y, lgammal();
+ * y = lgammal( x);
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns the base e (2.718...) logarithm of the absolute
+ * value of the gamma function of the argument. In the reentrant
+ * version, the sign (+1 or -1) of the gamma function is returned
+ * in the variable referenced by sgngaml.
+ *
+ * For arguments greater than 33, the logarithm of the gamma
+ * function is approximated by the logarithmic version of
+ * Stirling's formula using a polynomial approximation of
+ * degree 4. Arguments between -33 and +33 are reduced by
+ * recurrence to the interval [2,3] of a rational approximation.
+ * The cosecant reflection formula is employed for arguments
+ * less than -33.
+ *
+ * Arguments greater than MAXLGML (10^4928) return MAXNUML.
+ *
+ *
+ *
+ * ACCURACY:
+ *
+ *
+ * arithmetic      domain        # trials     peak         rms
+ *    IEEE         -40, 40        100000     2.2e-19     4.6e-20
+ *    IEEE    10^-2000,10^+2000    20000     1.6e-19     3.3e-20
+ * The error criterion was relative when the function magnitude
+ * was greater than one but absolute when it was less than one.
+ *
+ */
+
+/*
+ * Copyright 1994 by Stephen L. Moshier
+ */
+
+/*
+ * 26-11-2002 Modified for mingw.
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ */
+
+#ifndef __MINGW32__
+#include "mconf.h"
+#ifdef ANSIPROT
+extern long double fabsl ( long double );
+extern long double lgaml ( long double );
+extern long double logl ( long double );
+extern long double expl ( long double );
+extern long double gammal ( long double );
+extern long double sinl ( long double );
+extern long double floorl ( long double );
+extern long double powl ( long double, long double );
+extern long double polevll ( long double, void *, int );
+extern long double p1evll ( long double, void *, int );
+extern int isnanl ( long double );
+extern int isfinitel ( long double );
+#else
+long double fabsl(), lgaml(), logl(), expl(), gammal(), sinl();
+long double floorl(), powl(), polevll(), p1evll(), isnanl(), isfinitel();
+#endif
+#ifdef INFINITIES
+extern long double INFINITYL;
+#endif
+#ifdef NANS
+extern long double NANL;
+#endif
+#else /* __MINGW32__ */
+#include "cephes_mconf.h"
+#endif /* __MINGW32__ */
+
+#if UNK
+static long double S[9] = {
+-1.193945051381510095614E-3L,
+ 7.220599478036909672331E-3L,
+-9.622023360406271645744E-3L,
+-4.219773360705915470089E-2L,
+ 1.665386113720805206758E-1L,
+-4.200263503403344054473E-2L,
+-6.558780715202540684668E-1L,
+ 5.772156649015328608253E-1L,
+ 1.000000000000000000000E0L,
+};
+#endif
+#if IBMPC
+static const unsigned short S[] = {
+0xbaeb,0xd6d3,0x25e5,0x9c7e,0xbff5, XPD
+0xfe9a,0xceb4,0xc74e,0xec9a,0x3ff7, XPD
+0x9225,0xdfef,0xb0e9,0x9da5,0xbff8, XPD
+0x10b0,0xec17,0x87dc,0xacd7,0xbffa, XPD
+0x6b8d,0x7515,0x1905,0xaa89,0x3ffc, XPD
+0xf183,0x126b,0xf47d,0xac0a,0xbffa, XPD
+0x7bf6,0x57d1,0xa013,0xa7e7,0xbffe, XPD
+0xc7a9,0x7db0,0x67e3,0x93c4,0x3ffe, XPD
+0x0000,0x0000,0x0000,0x8000,0x3fff, XPD
+};
+#endif
+#if MIEEE
+static long S[27] = {
+0xbff50000,0x9c7e25e5,0xd6d3baeb,
+0x3ff70000,0xec9ac74e,0xceb4fe9a,
+0xbff80000,0x9da5b0e9,0xdfef9225,
+0xbffa0000,0xacd787dc,0xec1710b0,
+0x3ffc0000,0xaa891905,0x75156b8d,
+0xbffa0000,0xac0af47d,0x126bf183,
+0xbffe0000,0xa7e7a013,0x57d17bf6,
+0x3ffe0000,0x93c467e3,0x7db0c7a9,
+0x3fff0000,0x80000000,0x00000000,
+};
+#endif
+
+#if UNK
+static long double SN[9] = {
+ 1.133374167243894382010E-3L,
+ 7.220837261893170325704E-3L,
+ 9.621911155035976733706E-3L,
+-4.219773343731191721664E-2L,
+-1.665386113944413519335E-1L,
+-4.200263503402112910504E-2L,
+ 6.558780715202536547116E-1L,
+ 5.772156649015328608727E-1L,
+-1.000000000000000000000E0L,
+};
+#endif
+#if IBMPC
+static const unsigned SN[] = {
+0x5dd1,0x02de,0xb9f7,0x948d,0x3ff5, XPD
+0x989b,0xdd68,0xc5f1,0xec9c,0x3ff7, XPD
+0x2ca1,0x18f0,0x386f,0x9da5,0x3ff8, XPD
+0x783f,0x41dd,0x87d1,0xacd7,0xbffa, XPD
+0x7a5b,0xd76d,0x1905,0xaa89,0xbffc, XPD
+0x7f64,0x1234,0xf47d,0xac0a,0xbffa, XPD
+0x5e26,0x57d1,0xa013,0xa7e7,0x3ffe, XPD
+0xc7aa,0x7db0,0x67e3,0x93c4,0x3ffe, XPD
+0x0000,0x0000,0x0000,0x8000,0xbfff, XPD
+};
+#endif
+#if MIEEE
+static long SN[27] = {
+0x3ff50000,0x948db9f7,0x02de5dd1,
+0x3ff70000,0xec9cc5f1,0xdd68989b,
+0x3ff80000,0x9da5386f,0x18f02ca1,
+0xbffa0000,0xacd787d1,0x41dd783f,
+0xbffc0000,0xaa891905,0xd76d7a5b,
+0xbffa0000,0xac0af47d,0x12347f64,
+0x3ffe0000,0xa7e7a013,0x57d15e26,
+0x3ffe0000,0x93c467e3,0x7db0c7aa,
+0xbfff0000,0x80000000,0x00000000,
+};
+#endif
+
+
+/* A[]: Stirling's formula expansion of log gamma
+ * B[], C[]: log gamma function between 2 and 3
+ */
+
+
+/* log gamma(x) = ( x - 0.5 ) * log(x) - x + LS2PI + 1/x A(1/x^2)
+ * x >= 8
+ * Peak relative error 1.51e-21
+ * Relative spread of error peaks 5.67e-21
+ */
+#if UNK
+static long double A[7] = {
+ 4.885026142432270781165E-3L,
+-1.880801938119376907179E-3L,
+ 8.412723297322498080632E-4L,
+-5.952345851765688514613E-4L,
+ 7.936507795855070755671E-4L,
+-2.777777777750349603440E-3L,
+ 8.333333333333331447505E-2L,
+};
+#endif
+#if IBMPC
+static const unsigned short A[] = {
+0xd984,0xcc08,0x91c2,0xa012,0x3ff7, XPD
+0x3d91,0x0304,0x3da1,0xf685,0xbff5, XPD
+0x3bdc,0xaad1,0xd492,0xdc88,0x3ff4, XPD
+0x8b20,0x9fce,0x844e,0x9c09,0xbff4, XPD
+0xf8f2,0x30e5,0x0092,0xd00d,0x3ff4, XPD
+0x4d88,0x03a8,0x60b6,0xb60b,0xbff6, XPD
+0x9fcc,0xaaaa,0xaaaa,0xaaaa,0x3ffb, XPD
+};
+#endif
+#if MIEEE
+static long A[21] = {
+0x3ff70000,0xa01291c2,0xcc08d984,
+0xbff50000,0xf6853da1,0x03043d91,
+0x3ff40000,0xdc88d492,0xaad13bdc,
+0xbff40000,0x9c09844e,0x9fce8b20,
+0x3ff40000,0xd00d0092,0x30e5f8f2,
+0xbff60000,0xb60b60b6,0x03a84d88,
+0x3ffb0000,0xaaaaaaaa,0xaaaa9fcc,
+};
+#endif
+
+/* log gamma(x+2) = x B(x)/C(x)
+ * 0 <= x <= 1
+ * Peak relative error 7.16e-22
+ * Relative spread of error peaks 4.78e-20
+ */
+#if UNK
+static long double B[7] = {
+-2.163690827643812857640E3L,
+-8.723871522843511459790E4L,
+-1.104326814691464261197E6L,
+-6.111225012005214299996E6L,
+-1.625568062543700591014E7L,
+-2.003937418103815175475E7L,
+-8.875666783650703802159E6L,
+};
+static long double C[7] = {
+/* 1.000000000000000000000E0L,*/
+-5.139481484435370143617E2L,
+-3.403570840534304670537E4L,
+-6.227441164066219501697E5L,
+-4.814940379411882186630E6L,
+-1.785433287045078156959E7L,
+-3.138646407656182662088E7L,
+-2.099336717757895876142E7L,
+};
+#endif
+#if IBMPC
+static const unsigned short B[] = {
+0x9557,0x4995,0x0da1,0x873b,0xc00a, XPD
+0xfe44,0x9af8,0x5b8c,0xaa63,0xc00f, XPD
+0x5aa8,0x7cf5,0x3684,0x86ce,0xc013, XPD
+0x259a,0x258c,0xf206,0xba7f,0xc015, XPD
+0xbe18,0x1ca3,0xc0a0,0xf80a,0xc016, XPD
+0x168f,0x2c42,0x6717,0x98e3,0xc017, XPD
+0x2051,0x9d55,0x92c8,0x876e,0xc016, XPD
+};
+static const unsigned short C[] = {
+/*0x0000,0x0000,0x0000,0x8000,0x3fff, XPD*/
+0xaa77,0xcf2f,0xae76,0x807c,0xc008, XPD
+0xb280,0x0d74,0xb55a,0x84f3,0xc00e, XPD
+0xa505,0xcd30,0x81dc,0x9809,0xc012, XPD
+0x3369,0x4246,0xb8c2,0x92f0,0xc015, XPD
+0x63cf,0x6aee,0xbe6f,0x8837,0xc017, XPD
+0x26bb,0xccc7,0xb009,0xef75,0xc017, XPD
+0x462b,0xbae8,0xab96,0xa02a,0xc017, XPD
+};
+#endif
+#if MIEEE
+static long B[21] = {
+0xc00a0000,0x873b0da1,0x49959557,
+0xc00f0000,0xaa635b8c,0x9af8fe44,
+0xc0130000,0x86ce3684,0x7cf55aa8,
+0xc0150000,0xba7ff206,0x258c259a,
+0xc0160000,0xf80ac0a0,0x1ca3be18,
+0xc0170000,0x98e36717,0x2c42168f,
+0xc0160000,0x876e92c8,0x9d552051,
+};
+static long C[21] = {
+/*0x3fff0000,0x80000000,0x00000000,*/
+0xc0080000,0x807cae76,0xcf2faa77,
+0xc00e0000,0x84f3b55a,0x0d74b280,
+0xc0120000,0x980981dc,0xcd30a505,
+0xc0150000,0x92f0b8c2,0x42463369,
+0xc0170000,0x8837be6f,0x6aee63cf,
+0xc0170000,0xef75b009,0xccc726bb,
+0xc0170000,0xa02aab96,0xbae8462b,
+};
+#endif
+
+/* log( sqrt( 2*pi ) ) */
+static const long double LS2PI  =  0.91893853320467274178L;
+#define MAXLGM 1.04848146839019521116e+4928L
+
+
+/* Logarithm of gamma function */
+/* Reentrant version */ 
+
+long double __lgammal_r(long double x, int* sgngaml)
+{
+long double p, q, w, z, f, nx;
+int i;
+
+*sgngaml = 1;
+#ifdef NANS
+if( isnanl(x) )
+	return(NANL);
+#endif
+#ifdef INFINITIES
+if( !isfinitel(x) )
+	return(INFINITYL);
+#endif
+if( x < -34.0L )
+	{
+	q = -x;
+	w = __lgammal_r(q, sgngaml); /* note this modifies sgngam! */
+	p = floorl(q);
+	if( p == q )
+		{
+lgsing:
+		_SET_ERRNO(EDOM);
+		mtherr( "lgammal", SING );
+#ifdef INFINITIES
+		return (INFINITYL);
+#else
+		return (MAXNUML);
+#endif
+		}
+	i = p;
+	if( (i & 1) == 0 )
+		*sgngaml = -1;
+	else
+		*sgngaml = 1;
+	z = q - p;
+	if( z > 0.5L )
+		{
+		p += 1.0L;
+		z = p - q;
+		}
+	z = q * sinl( PIL * z );
+	if( z == 0.0L )
+		goto lgsing;
+/*	z = LOGPI - logl( z ) - w; */
+	z = logl( PIL/z ) - w;
+	return( z );
+	}
+
+if( x < 13.0L )
+	{
+	z = 1.0L;
+	nx = floorl( x +  0.5L );
+	f = x - nx;
+	while( x >= 3.0L )
+		{
+		nx -= 1.0L;
+		x = nx + f;
+		z *= x;
+		}
+	while( x < 2.0L )
+		{
+		if( fabsl(x) <= 0.03125 )
+			goto lsmall;
+		z /= nx +  f;
+		nx += 1.0L;
+		x = nx + f;
+		}
+	if( z < 0.0L )
+		{
+		*sgngaml = -1;
+		z = -z;
+		}
+	else
+		*sgngaml = 1;
+	if( x == 2.0L )
+		return( logl(z) );
+	x = (nx - 2.0L) + f;
+	p = x * polevll( x, B, 6 ) / p1evll( x, C, 7);
+	return( logl(z) + p );
+	}
+
+if( x > MAXLGM )
+	{
+	_SET_ERRNO(ERANGE);
+	mtherr( "lgammal", OVERFLOW );
+#ifdef INFINITIES
+	return( *sgngaml * INFINITYL );
+#else
+	return( *sgngaml * MAXNUML );
+#endif
+	}
+
+q = ( x - 0.5L ) * logl(x) - x + LS2PI;
+if( x > 1.0e10L )
+	return(q);
+p = 1.0L/(x*x);
+q += polevll( p, A, 6 ) / x;
+return( q );
+
+
+lsmall:
+if( x == 0.0L )
+	goto lgsing;
+if( x < 0.0L )
+	{
+	x = -x;
+	q = z / (x * polevll( x, SN, 8 ));
+	}
+else
+	q = z / (x * polevll( x, S, 8 ));
+if( q < 0.0L )
+	{
+	*sgngaml = -1;
+	q = -q;
+	}
+else
+	*sgngaml = 1;
+q = logl( q );
+return(q);
+}
+
+/* This is the C99 version */
+
+long double lgammal(long double x)
+{
+  int local_sgngaml=0;
+  return (__lgammal_r(x, &local_sgngaml));
+}
diff --git a/winsup/mingw/mingwex/math/tgamma.c b/winsup/mingw/mingwex/math/tgamma.c
new file mode 100644
index 0000000..c3912a8
--- /dev/null
+++ b/winsup/mingw/mingwex/math/tgamma.c
@@ -0,0 +1,385 @@
+/*							gamma.c
+ *
+ *	Gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * double x, y, __tgamma_r();
+ * int* sgngam;
+ * y = __tgamma_r( x, sgngam );
+ * 
+ * double x, y, tgamma();
+ * y = tgamma( x)
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns gamma function of the argument.  The result is
+ * correctly signed. In the reentrant version the sign (+1 or -1)
+ * is returned in the variable referenced by sgngam.
+ *
+ * Arguments |x| <= 34 are reduced by recurrence and the function
+ * approximated by a rational function of degree 6/7 in the
+ * interval (2,3).  Large arguments are handled by Stirling's
+ * formula. Large negative arguments are made positive using
+ * a reflection formula.  
+ *
+ *
+ * ACCURACY:
+ *
+ *                      Relative error:
+ * arithmetic   domain     # trials      peak         rms
+ *    DEC      -34, 34      10000       1.3e-16     2.5e-17
+ *    IEEE    -170,-33      20000       2.3e-15     3.3e-16
+ *    IEEE     -33,  33     20000       9.4e-16     2.2e-16
+ *    IEEE      33, 171.6   20000       2.3e-15     3.2e-16
+ *
+ * Error for arguments outside the test range will be larger
+ * owing to error amplification by the exponential function.
+ *
+ */
+
+/*
+Cephes Math Library Release 2.8:  June, 2000
+Copyright 1984, 1987, 1989, 1992, 2000 by Stephen L. Moshier
+*/
+
+
+/*
+ * 26-11-2002 Modified for mingw.
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ */
+
+
+#ifndef __MINGW32__
+#include "mconf.h"
+#else
+#include "cephes_mconf.h"
+#endif
+
+#ifdef UNK
+static const double P[] = {
+  1.60119522476751861407E-4,
+  1.19135147006586384913E-3,
+  1.04213797561761569935E-2,
+  4.76367800457137231464E-2,
+  2.07448227648435975150E-1,
+  4.94214826801497100753E-1,
+  9.99999999999999996796E-1
+};
+static const double Q[] = {
+-2.31581873324120129819E-5,
+ 5.39605580493303397842E-4,
+-4.45641913851797240494E-3,
+ 1.18139785222060435552E-2,
+ 3.58236398605498653373E-2,
+-2.34591795718243348568E-1,
+ 7.14304917030273074085E-2,
+ 1.00000000000000000320E0
+};
+#define MAXGAM 171.624376956302725
+static const double LOGPI = 1.14472988584940017414;
+#endif
+
+#ifdef DEC
+static const unsigned short P[] = {
+0035047,0162701,0146301,0005234,
+0035634,0023437,0032065,0176530,
+0036452,0137157,0047330,0122574,
+0037103,0017310,0143041,0017232,
+0037524,0066516,0162563,0164605,
+0037775,0004671,0146237,0014222,
+0040200,0000000,0000000,0000000
+};
+static const unsigned short Q[] = {
+0134302,0041724,0020006,0116565,
+0035415,0072121,0044251,0025634,
+0136222,0003447,0035205,0121114,
+0036501,0107552,0154335,0104271,
+0037022,0135717,0014776,0171471,
+0137560,0034324,0165024,0037021,
+0037222,0045046,0047151,0161213,
+0040200,0000000,0000000,0000000
+};
+#define MAXGAM 34.84425627277176174
+#endif
+
+#ifdef IBMPC
+static const unsigned short P[] = {
+0x2153,0x3998,0xfcb8,0x3f24,
+0xbfab,0xe686,0x84e3,0x3f53,
+0x14b0,0xe9db,0x57cd,0x3f85,
+0x23d3,0x18c4,0x63d9,0x3fa8,
+0x7d31,0xdcae,0x8da9,0x3fca,
+0xe312,0x3993,0xa137,0x3fdf,
+0x0000,0x0000,0x0000,0x3ff0
+};
+static const unsigned short Q[] = {
+0xd3af,0x8400,0x487a,0xbef8,
+0x2573,0x2915,0xae8a,0x3f41,
+0xb44a,0xe750,0x40e4,0xbf72,
+0xb117,0x5b1b,0x31ed,0x3f88,
+0xde67,0xe33f,0x5779,0x3fa2,
+0x87c2,0x9d42,0x071a,0xbfce,
+0x3c51,0xc9cd,0x4944,0x3fb2,
+0x0000,0x0000,0x0000,0x3ff0
+};
+#define MAXGAM 171.624376956302725
+#endif 
+
+#ifdef MIEEE
+static const unsigned short P[] = {
+0x3f24,0xfcb8,0x3998,0x2153,
+0x3f53,0x84e3,0xe686,0xbfab,
+0x3f85,0x57cd,0xe9db,0x14b0,
+0x3fa8,0x63d9,0x18c4,0x23d3,
+0x3fca,0x8da9,0xdcae,0x7d31,
+0x3fdf,0xa137,0x3993,0xe312,
+0x3ff0,0x0000,0x0000,0x0000
+};
+static const unsigned short Q[] = {
+0xbef8,0x487a,0x8400,0xd3af,
+0x3f41,0xae8a,0x2915,0x2573,
+0xbf72,0x40e4,0xe750,0xb44a,
+0x3f88,0x31ed,0x5b1b,0xb117,
+0x3fa2,0x5779,0xe33f,0xde67,
+0xbfce,0x071a,0x9d42,0x87c2,
+0x3fb2,0x4944,0xc9cd,0x3c51,
+0x3ff0,0x0000,0x0000,0x0000
+};
+#define MAXGAM 171.624376956302725
+#endif 
+
+/* Stirling's formula for the gamma function */
+#if UNK
+static const double STIR[5] = {
+ 7.87311395793093628397E-4,
+-2.29549961613378126380E-4,
+-2.68132617805781232825E-3,
+ 3.47222221605458667310E-3,
+ 8.33333333333482257126E-2,
+};
+#define MAXSTIR 143.01608
+static const double SQTPI = 2.50662827463100050242E0;
+#endif
+#if DEC
+static const unsigned short STIR[20] = {
+0035516,0061622,0144553,0112224,
+0135160,0131531,0037460,0165740,
+0136057,0134460,0037242,0077270,
+0036143,0107070,0156306,0027751,
+0037252,0125252,0125252,0146064,
+};
+#define MAXSTIR 26.77
+static const unsigned short SQT[4] = {
+0040440,0066230,0177661,0034055,
+};
+#define SQTPI *(double *)SQT
+#endif
+#if IBMPC
+static const unsigned short STIR[20] = {
+0x7293,0x592d,0xcc72,0x3f49,
+0x1d7c,0x27e6,0x166b,0xbf2e,
+0x4fd7,0x07d4,0xf726,0xbf65,
+0xc5fd,0x1b98,0x71c7,0x3f6c,
+0x5986,0x5555,0x5555,0x3fb5,
+};
+#define MAXSTIR 143.01608
+static const unsigned short SQT[4] = {
+0x2706,0x1ff6,0x0d93,0x4004,
+};
+#define SQTPI *(double *)SQT
+#endif
+#if MIEEE
+static const unsigned short STIR[20] = {
+0x3f49,0xcc72,0x592d,0x7293,
+0xbf2e,0x166b,0x27e6,0x1d7c,
+0xbf65,0xf726,0x07d4,0x4fd7,
+0x3f6c,0x71c7,0x1b98,0xc5fd,
+0x3fb5,0x5555,0x5555,0x5986,
+};
+#define MAXSTIR 143.01608
+static const unsigned short SQT[4] = {
+0x4004,0x0d93,0x1ff6,0x2706,
+};
+#define SQTPI *(double *)SQT
+#endif
+
+#ifndef __MINGW32__
+int sgngam = 0;
+extern int sgngam;
+extern double MAXLOG, MAXNUM, PI;
+#ifdef ANSIPROT
+extern double pow ( double, double );
+extern double log ( double );
+extern double exp ( double );
+extern double sin ( double );
+extern double polevl ( double, void *, int );
+extern double p1evl ( double, void *, int );
+extern double floor ( double );
+extern double fabs ( double );
+extern int isnan ( double );
+extern int isfinite ( double );
+static double stirf ( double );
+double lgam ( double );
+#else
+double pow(), log(), exp(), sin(), polevl(), p1evl(), floor(), fabs();
+int isnan(), isfinite();
+static double stirf();
+double lgam();
+#endif
+#ifdef INFINITIES
+extern double INFINITY;
+#endif
+#ifdef NANS
+extern double NAN;
+#endif
+#else /* __MINGW32__ */
+static double stirf ( double );
+#endif
+
+/* Gamma function computed by Stirling's formula.
+ * The polynomial STIR is valid for 33 <= x <= 172.
+ */
+static double stirf(x)
+double x;
+{
+double y, w, v;
+
+w = 1.0/x;
+w = 1.0 + w * polevl( w, STIR, 4 );
+y = exp(x);
+if( x > MAXSTIR )
+	{ /* Avoid overflow in pow() */
+	v = pow( x, 0.5 * x - 0.25 );
+	y = v * (v / y);
+	}
+else
+	{
+	y = pow( x, x - 0.5 ) / y;
+	}
+y = SQTPI * y * w;
+return( y );
+}
+
+
+
+double __tgamma_r(double x, int* sgngam)
+{
+double p, q, z;
+int i;
+
+*sgngam = 1;
+#ifdef NANS
+if( isnan(x) )
+	return(x);
+#endif
+#ifdef INFINITIES
+#ifdef NANS
+if( x == INFINITY )
+	return(x);
+if( x == -INFINITY )
+	return(NAN);
+#else
+if( !isfinite(x) )
+	return(x);
+#endif
+#endif
+q = fabs(x);
+
+if( q > 33.0 )
+	{
+	if( x < 0.0 )
+		{
+		p = floor(q);
+		if( p == q )
+			{
+gsing:
+			_SET_ERRNO(EDOM);
+			mtherr( "tgamma", SING );
+#ifdef INFINITIES
+			return (INFINITY);
+#else
+			return (MAXNUM);
+#endif
+			}
+		i = p;
+		if( (i & 1) == 0 )
+			*sgngam = -1;
+		z = q - p;
+		if( z > 0.5 )
+			{
+			p += 1.0;
+			z = q - p;
+			}
+		z = q * sin( PI * z );
+		if( z == 0.0 )
+			{
+			_SET_ERRNO(ERANGE);
+			mtherr( "tgamma", OVERFLOW );
+#ifdef INFINITIES
+			return( *sgngam * INFINITY);
+#else
+			return( *sgngam * MAXNUM);
+#endif
+			}
+		z = fabs(z);
+		z = PI/(z * stirf(q) );
+		}
+	else
+		{
+		z = stirf(x);
+		}
+	return( *sgngam * z );
+	}
+
+z = 1.0;
+while( x >= 3.0 )
+	{
+	x -= 1.0;
+	z *= x;
+	}
+
+while( x < 0.0 )
+	{
+	if( x > -1.E-9 )
+		goto small;
+	z /= x;
+	x += 1.0;
+	}
+
+while( x < 2.0 )
+	{
+	if( x < 1.e-9 )
+		goto small;
+	z /= x;
+	x += 1.0;
+	}
+
+if( x == 2.0 )
+	return(z);
+
+x -= 2.0;
+p = polevl( x, P, 6 );
+q = polevl( x, Q, 7 );
+return( z * p / q );
+
+small:
+if( x == 0.0 )
+	{
+	goto gsing;
+	}
+else
+	return( z/((1.0 + 0.5772156649015329 * x) * x) );
+}
+
+/* This is the C99 version */
+
+double tgamma(double x)
+{
+  int local_sgngam=0;
+  return (__tgamma_r(x, &local_sgngam));
+}
diff --git a/winsup/mingw/mingwex/math/tgammaf.c b/winsup/mingw/mingwex/math/tgammaf.c
new file mode 100644
index 0000000..38e7d75
--- /dev/null
+++ b/winsup/mingw/mingwex/math/tgammaf.c
@@ -0,0 +1,265 @@
+/*							gammaf.c
+ *
+ *	Gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * float x, y, __tgammaf_r();
+ * int* sgngamf;
+ * y = __tgammaf_r( x, sgngamf );
+ * 
+ * float x, y, tgammaf();
+ * y = tgammaf( x);
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns gamma function of the argument.  The result is
+ * correctly signed. In the reentrant version the sign (+1 or -1)
+ * is returned in the variable referenced by sgngamf.
+ *
+ * Arguments between 0 and 10 are reduced by recurrence and the
+ * function is approximated by a polynomial function covering
+ * the interval (2,3).  Large arguments are handled by Stirling's
+ * formula. Negative arguments are made positive using
+ * a reflection formula.  
+ *
+ *
+ * ACCURACY:
+ *
+ *                      Relative error:
+ * arithmetic   domain     # trials      peak         rms
+ *    IEEE       0,-33      100,000     5.7e-7      1.0e-7
+ *    IEEE       -33,0      100,000     6.1e-7      1.2e-7
+ *
+ *
+ */
+
+/*
+Cephes Math Library Release 2.7:  July, 1998
+Copyright 1984, 1987, 1989, 1992, 1998 by Stephen L. Moshier
+*/
+
+
+/*
+ * 26-11-2002 Modified for mingw.
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ */
+
+
+#ifndef __MINGW32__
+#include "mconf.h"
+#else 
+#include "cephes_mconf.h"
+#endif
+
+/* define MAXGAM 34.84425627277176174 */
+
+/* Stirling's formula for the gamma function
+ * gamma(x) = sqrt(2 pi) x^(x-.5) exp(-x) ( 1 + 1/x P(1/x) )
+ * .028 < 1/x < .1
+ * relative error < 1.9e-11
+ */
+static const float STIR[] = {
+-2.705194986674176E-003,
+ 3.473255786154910E-003,
+ 8.333331788340907E-002,
+};
+static const float MAXSTIR = 26.77;
+static const float SQTPIF = 2.50662827463100050242; /* sqrt( 2 pi ) */
+
+#ifndef __MINGW32__
+
+extern float MAXLOGF, MAXNUMF, PIF;
+
+#ifdef ANSIC
+float expf(float);
+float logf(float);
+float powf( float, float );
+float sinf(float);
+float gammaf(float);
+float floorf(float);
+static float stirf(float);
+float polevlf( float, float *, int );
+float p1evlf( float, float *, int );
+#else
+float expf(), logf(), powf(), sinf(), floorf();
+float polevlf(), p1evlf();
+static float stirf();
+#endif
+
+#else /* __MINGW32__ */
+static float stirf(float);
+#endif
+
+/* Gamma function computed by Stirling's formula,
+ * sqrt(2 pi) x^(x-.5) exp(-x) (1 + 1/x P(1/x))
+ * The polynomial STIR is valid for 33 <= x <= 172.
+ */
+static float stirf( float x )
+{
+float  y, w, v;
+
+w = 1.0/x;
+w = 1.0 + w * polevlf( w, STIR, 2 );
+y = expf( -x );
+if( x > MAXSTIR )
+	{ /* Avoid overflow in pow() */
+	v = powf( x, 0.5 * x - 0.25 );
+	y *= v;
+	y *= v;
+	}
+else
+	{
+	y = powf( x, x - 0.5 ) * y;
+	}
+y = SQTPIF * y * w;
+return( y );
+}
+
+
+/* gamma(x+2), 0 < x < 1 */
+static const float P[] = {
+ 1.536830450601906E-003,
+ 5.397581592950993E-003,
+ 4.130370201859976E-003,
+ 7.232307985516519E-002,
+ 8.203960091619193E-002,
+ 4.117857447645796E-001,
+ 4.227867745131584E-001,
+ 9.999999822945073E-001,
+};
+
+float __tgammaf_r( float x, int* sgngamf)
+{
+float p, q, z, nz;
+int i, direction, negative;
+
+#ifdef NANS
+if( isnan(x) )
+	return(x);
+#endif
+#ifdef INFINITIES
+#ifdef NANS
+if( x == INFINITYF )
+	return(x);
+if( x == -INFINITYF )
+	return(NANF);
+#else
+if( !isfinite(x) )
+	return(x);
+#endif
+#endif
+
+*sgngamf = 1;
+negative = 0;
+nz = 0.0;
+if( x < 0.0 )
+	{
+	negative = 1;
+	q = -x;
+	p = floorf(q);
+	if( p == q )
+		{
+gsing:
+		_SET_ERRNO(EDOM);
+		mtherr( "tgammaf", SING );
+#ifdef INFINITIES
+		return (INFINITYF);
+#else
+		return (MAXNUMF);
+#endif
+			}
+	i = p;
+	if( (i & 1) == 0 )
+		*sgngamf = -1;
+	nz = q - p;
+	if( nz > 0.5 )
+		{
+		p += 1.0;
+		nz = q - p;
+		}
+	nz = q * sinf( PIF * nz );
+	if( nz == 0.0 )
+		{
+		_SET_ERRNO(ERANGE);
+		mtherr( "tgamma", OVERFLOW );
+#ifdef INFINITIES
+		return( *sgngamf * INFINITYF);
+#else
+		return( *sgngamf * MAXNUMF);
+#endif
+		}
+	if( nz < 0 )
+		nz = -nz;
+	x = q;
+	}
+if( x >= 10.0 )
+	{
+	z = stirf(x);
+	}
+if( x < 2.0 )
+	direction = 1;
+else
+	direction = 0;
+z = 1.0;
+while( x >= 3.0 )
+	{
+	x -= 1.0;
+	z *= x;
+	}
+/*
+while( x < 0.0 )
+	{
+	if( x > -1.E-4 )
+		goto small;
+	z *=x;
+	x += 1.0;
+	}
+*/
+while( x < 2.0 )
+	{
+	if( x < 1.e-4 )
+		goto small;
+	z *=x;
+	x += 1.0;
+	}
+
+if( direction )
+	z = 1.0/z;
+
+if( x == 2.0 )
+	return(z);
+
+x -= 2.0;
+p = z * polevlf( x, P, 7 );
+
+gdone:
+
+if( negative )
+	{
+	p = *sgngamf * PIF/(nz * p );
+	}
+return(p);
+
+small:
+if( x == 0.0 )
+	{
+	goto gsing;
+	}
+else
+	{
+	p = z / ((1.0 + 0.5772156649015329 * x) * x);
+	goto gdone;
+	}
+}
+
+/* This is the C99 version */
+
+float tgammaf(float x)
+{
+  int local_sgngamf=0;
+  return (__tgammaf_r(x, &local_sgngamf));
+}
diff --git a/winsup/mingw/mingwex/math/tgammal.c b/winsup/mingw/mingwex/math/tgammal.c
new file mode 100644
index 0000000..682a12e
--- /dev/null
+++ b/winsup/mingw/mingwex/math/tgammal.c
@@ -0,0 +1,501 @@
+/*							gammal.c
+ *
+ *	Gamma function
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * long double x, y, __tgammal_r();
+ * int* sgngaml;
+ * y = __tgammal_r( x, sgngaml );
+ * 
+ * long double x, y, tgammal();
+ * y = tgammal( x); *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * Returns gamma function of the argument.  The result is
+ * correctly signed. In the reentrant version the sign (+1 or -1)
+ * is returned in the variable referenced by sgngamf.
+  *
+ * Arguments |x| <= 13 are reduced by recurrence and the function
+ * approximated by a rational function of degree 7/8 in the
+ * interval (2,3).  Large arguments are handled by Stirling's
+ * formula. Large negative arguments are made positive using
+ * a reflection formula.  
+ *
+ *
+ * ACCURACY:
+ *
+ *                      Relative error:
+ * arithmetic   domain     # trials      peak         rms
+ *    IEEE     -40,+40      10000       3.6e-19     7.9e-20
+ *    IEEE    -1755,+1755   10000       4.8e-18     6.5e-19
+ *
+ * Accuracy for large arguments is dominated by error in powl().
+ *
+ */
+
+/*
+Copyright 1994 by Stephen L. Moshier
+*/
+
+
+/*
+ * 26-11-2002 Modified for mingw.
+ * Danny Smith <dannysmith@users.sourceforge.net>
+ */
+
+
+#ifndef __MINGW32__
+#include "mconf.h"
+#else
+#include "cephes_mconf.h"
+#endif
+
+/*
+gamma(x+2)  = gamma(x+2) P(x)/Q(x)
+0 <= x <= 1
+Relative error
+n=7, d=8
+Peak error =  1.83e-20
+Relative error spread =  8.4e-23
+*/
+
+#if UNK
+static const long double P[8] = {
+ 4.212760487471622013093E-5L,
+ 4.542931960608009155600E-4L,
+ 4.092666828394035500949E-3L,
+ 2.385363243461108252554E-2L,
+ 1.113062816019361559013E-1L,
+ 3.629515436640239168939E-1L,
+ 8.378004301573126728826E-1L,
+ 1.000000000000000000009E0L,
+};
+static const long double Q[9] = {
+-1.397148517476170440917E-5L,
+ 2.346584059160635244282E-4L,
+-1.237799246653152231188E-3L,
+-7.955933682494738320586E-4L,
+ 2.773706565840072979165E-2L,
+-4.633887671244534213831E-2L,
+-2.243510905670329164562E-1L,
+ 4.150160950588455434583E-1L,
+ 9.999999999999999999908E-1L,
+};
+#endif
+#if IBMPC
+static const short P[] = {
+0x434a,0x3f22,0x2bda,0xb0b2,0x3ff0, XPD
+0xf5aa,0xe82f,0x335b,0xee2e,0x3ff3, XPD
+0xbe6c,0x3757,0xc717,0x861b,0x3ff7, XPD
+0x7f43,0x5196,0xb166,0xc368,0x3ff9, XPD
+0x9549,0x8eb5,0x8c3a,0xe3f4,0x3ffb, XPD
+0x8d75,0x23af,0xc8e4,0xb9d4,0x3ffd, XPD
+0x29cf,0x19b3,0x16c8,0xd67a,0x3ffe, XPD
+0x0000,0x0000,0x0000,0x8000,0x3fff, XPD
+};
+static const short Q[] = {
+0x5473,0x2de8,0x1268,0xea67,0xbfee, XPD
+0x334b,0xc2f0,0xa2dd,0xf60e,0x3ff2, XPD
+0xbeed,0x1853,0xa691,0xa23d,0xbff5, XPD
+0x296e,0x7cb1,0x5dfd,0xd08f,0xbff4, XPD
+0x0417,0x7989,0xd7bc,0xe338,0x3ff9, XPD
+0x3295,0x3698,0xd580,0xbdcd,0xbffa, XPD
+0x75ef,0x3ab7,0x4ad3,0xe5bc,0xbffc, XPD
+0xe458,0x2ec7,0xfd57,0xd47c,0x3ffd, XPD
+0x0000,0x0000,0x0000,0x8000,0x3fff, XPD
+};
+#endif
+#if MIEEE
+static const long P[24] = {
+0x3ff00000,0xb0b22bda,0x3f22434a,
+0x3ff30000,0xee2e335b,0xe82ff5aa,
+0x3ff70000,0x861bc717,0x3757be6c,
+0x3ff90000,0xc368b166,0x51967f43,
+0x3ffb0000,0xe3f48c3a,0x8eb59549,
+0x3ffd0000,0xb9d4c8e4,0x23af8d75,
+0x3ffe0000,0xd67a16c8,0x19b329cf,
+0x3fff0000,0x80000000,0x00000000,
+};
+static const long Q[27] = {
+0xbfee0000,0xea671268,0x2de85473,
+0x3ff20000,0xf60ea2dd,0xc2f0334b,
+0xbff50000,0xa23da691,0x1853beed,
+0xbff40000,0xd08f5dfd,0x7cb1296e,
+0x3ff90000,0xe338d7bc,0x79890417,
+0xbffa0000,0xbdcdd580,0x36983295,
+0xbffc0000,0xe5bc4ad3,0x3ab775ef,
+0x3ffd0000,0xd47cfd57,0x2ec7e458,
+0x3fff0000,0x80000000,0x00000000,
+};
+#endif
+/*
+static const long double P[] = {
+-3.01525602666895735709e0L,
+-3.25157411956062339893e1L,
+-2.92929976820724030353e2L,
+-1.70730828800510297666e3L,
+-7.96667499622741999770e3L,
+-2.59780216007146401957e4L,
+-5.99650230220855581642e4L,
+-7.15743521530849602425e4L
+};
+static const long double Q[] = {
+ 1.00000000000000000000e0L,
+-1.67955233807178858919e1L,
+ 8.85946791747759881659e1L,
+ 5.69440799097468430177e1L,
+-1.98526250512761318471e3L,
+ 3.31667508019495079814e3L,
+ 1.60577839621734713377e4L,
+-2.97045081369399940529e4L,
+-7.15743521530849602412e4L
+};
+*/
+#define MAXGAML 1755.455L
+/*static const long double LOGPI = 1.14472988584940017414L;*/
+
+/* Stirling's formula for the gamma function
+gamma(x) = sqrt(2 pi) x^(x-.5) exp(-x) (1 + 1/x P(1/x))
+z(x) = x
+13 <= x <= 1024
+Relative error
+n=8, d=0
+Peak error =  9.44e-21
+Relative error spread =  8.8e-4
+*/
+#if UNK
+static const long double STIR[9] = {
+ 7.147391378143610789273E-4L,
+-2.363848809501759061727E-5L,
+-5.950237554056330156018E-4L,
+ 6.989332260623193171870E-5L,
+ 7.840334842744753003862E-4L,
+-2.294719747873185405699E-4L,
+-2.681327161876304418288E-3L,
+ 3.472222222230075327854E-3L,
+ 8.333333333333331800504E-2L,
+};
+#endif
+#if IBMPC
+static const short STIR[] = {
+0x6ede,0x69f7,0x54e3,0xbb5d,0x3ff4, XPD
+0xc395,0x0295,0x4443,0xc64b,0xbfef, XPD
+0xba6f,0x7c59,0x5e47,0x9bfb,0xbff4, XPD
+0x5704,0x1a39,0xb11d,0x9293,0x3ff1, XPD
+0x30b7,0x1a21,0x98b2,0xcd87,0x3ff4, XPD
+0xbef3,0x7023,0x6a08,0xf09e,0xbff2, XPD
+0x3a1c,0x5ac8,0x3478,0xafb9,0xbff6, XPD
+0xc3c9,0x906e,0x38e3,0xe38e,0x3ff6, XPD
+0xa1d5,0xaaaa,0xaaaa,0xaaaa,0x3ffb, XPD
+};
+#endif
+#if MIEEE
+static const long STIR[27] = {
+0x3ff40000,0xbb5d54e3,0x69f76ede,
+0xbfef0000,0xc64b4443,0x0295c395,
+0xbff40000,0x9bfb5e47,0x7c59ba6f,
+0x3ff10000,0x9293b11d,0x1a395704,
+0x3ff40000,0xcd8798b2,0x1a2130b7,
+0xbff20000,0xf09e6a08,0x7023bef3,
+0xbff60000,0xafb93478,0x5ac83a1c,
+0x3ff60000,0xe38e38e3,0x906ec3c9,
+0x3ffb0000,0xaaaaaaaa,0xaaaaa1d5,
+};
+#endif
+#define MAXSTIR 1024.0L
+static const long double SQTPI = 2.50662827463100050242E0L;
+
+/* 1/gamma(x) = z P(z)
+ * z(x) = 1/x
+ * 0 < x < 0.03125
+ * Peak relative error 4.2e-23
+ */
+#if UNK
+static const long double S[9] = {
+-1.193945051381510095614E-3L,
+ 7.220599478036909672331E-3L,
+-9.622023360406271645744E-3L,
+-4.219773360705915470089E-2L,
+ 1.665386113720805206758E-1L,
+-4.200263503403344054473E-2L,
+-6.558780715202540684668E-1L,
+ 5.772156649015328608253E-1L,
+ 1.000000000000000000000E0L,
+};
+#endif
+#if IBMPC
+static const unsigned short S[] = {
+0xbaeb,0xd6d3,0x25e5,0x9c7e,0xbff5, XPD
+0xfe9a,0xceb4,0xc74e,0xec9a,0x3ff7, XPD
+0x9225,0xdfef,0xb0e9,0x9da5,0xbff8, XPD
+0x10b0,0xec17,0x87dc,0xacd7,0xbffa, XPD
+0x6b8d,0x7515,0x1905,0xaa89,0x3ffc, XPD
+0xf183,0x126b,0xf47d,0xac0a,0xbffa, XPD
+0x7bf6,0x57d1,0xa013,0xa7e7,0xbffe, XPD
+0xc7a9,0x7db0,0x67e3,0x93c4,0x3ffe, XPD
+0x0000,0x0000,0x0000,0x8000,0x3fff, XPD
+};
+#endif
+#if MIEEE
+static const long S[27] = {
+0xbff50000,0x9c7e25e5,0xd6d3baeb,
+0x3ff70000,0xec9ac74e,0xceb4fe9a,
+0xbff80000,0x9da5b0e9,0xdfef9225,
+0xbffa0000,0xacd787dc,0xec1710b0,
+0x3ffc0000,0xaa891905,0x75156b8d,
+0xbffa0000,0xac0af47d,0x126bf183,
+0xbffe0000,0xa7e7a013,0x57d17bf6,
+0x3ffe0000,0x93c467e3,0x7db0c7a9,
+0x3fff0000,0x80000000,0x00000000,
+};
+#endif
+/* 1/gamma(-x) = z P(z)
+ * z(x) = 1/x
+ * 0 < x < 0.03125
+ * Peak relative error 5.16e-23
+ * Relative error spread =  2.5e-24
+ */
+#if UNK
+static const long double SN[9] = {
+ 1.133374167243894382010E-3L,
+ 7.220837261893170325704E-3L,
+ 9.621911155035976733706E-3L,
+-4.219773343731191721664E-2L,
+-1.665386113944413519335E-1L,
+-4.200263503402112910504E-2L,
+ 6.558780715202536547116E-1L,
+ 5.772156649015328608727E-1L,
+-1.000000000000000000000E0L,
+};
+#endif
+#if IBMPC
+static const unsigned short SN[] = {
+0x5dd1,0x02de,0xb9f7,0x948d,0x3ff5, XPD
+0x989b,0xdd68,0xc5f1,0xec9c,0x3ff7, XPD
+0x2ca1,0x18f0,0x386f,0x9da5,0x3ff8, XPD
+0x783f,0x41dd,0x87d1,0xacd7,0xbffa, XPD
+0x7a5b,0xd76d,0x1905,0xaa89,0xbffc, XPD
+0x7f64,0x1234,0xf47d,0xac0a,0xbffa, XPD
+0x5e26,0x57d1,0xa013,0xa7e7,0x3ffe, XPD
+0xc7aa,0x7db0,0x67e3,0x93c4,0x3ffe, XPD
+0x0000,0x0000,0x0000,0x8000,0xbfff, XPD
+};
+#endif
+#if MIEEE
+static const long SN[27] = {
+0x3ff50000,0x948db9f7,0x02de5dd1,
+0x3ff70000,0xec9cc5f1,0xdd68989b,
+0x3ff80000,0x9da5386f,0x18f02ca1,
+0xbffa0000,0xacd787d1,0x41dd783f,
+0xbffc0000,0xaa891905,0xd76d7a5b,
+0xbffa0000,0xac0af47d,0x12347f64,
+0x3ffe0000,0xa7e7a013,0x57d15e26,
+0x3ffe0000,0x93c467e3,0x7db0c7aa,
+0xbfff0000,0x80000000,0x00000000,
+};
+#endif
+
+#ifndef __MINGW32__
+extern long double MAXLOGL, MAXNUML, PIL;
+/* #define PIL 3.14159265358979323846L */
+/* #define MAXNUML 1.189731495357231765021263853E4932L */
+
+#ifdef ANSIPROT
+extern long double fabsl ( long double );
+extern long double lgaml ( long double );
+extern long double logl ( long double );
+extern long double expl ( long double );
+extern long double gammal ( long double );
+extern long double sinl ( long double );
+extern long double floorl ( long double );
+extern long double powl ( long double, long double );
+extern long double polevll ( long double, void *, int );
+extern long double p1evll ( long double, void *, int );
+extern int isnanl ( long double );
+extern int isfinitel ( long double );
+static long double stirf ( long double );
+#else
+long double fabsl(), lgaml(), logl(), expl(), gammal(), sinl();
+long double floorl(), powl(), polevll(), p1evll(), isnanl(), isfinitel();
+static long double stirf();
+#endif
+#ifdef INFINITIES
+extern long double INFINITYL;
+#endif
+#ifdef NANS
+extern long double NANL;
+#endif
+
+#else /* __MINGW32__ */
+static long double stirf ( long double );
+#endif 
+
+
+/* Gamma function computed by Stirling's formula.  */
+
+static long double stirf(x)
+long double x;
+{
+long double y, w, v;
+
+w = 1.0L/x;
+/* For large x, use rational coefficients from the analytical expansion.  */
+if( x > 1024.0L )
+	w = (((((6.97281375836585777429E-5L * w
+		+ 7.84039221720066627474E-4L) * w
+		- 2.29472093621399176955E-4L) * w
+		- 2.68132716049382716049E-3L) * w
+		+ 3.47222222222222222222E-3L) * w
+		+ 8.33333333333333333333E-2L) * w
+		+ 1.0L;
+else
+	w = 1.0L + w * polevll( w, STIR, 8 );
+y = expl(x);
+if( x > MAXSTIR )
+	{ /* Avoid overflow in pow() */
+	v = powl( x, 0.5L * x - 0.25L );
+	y = v * (v / y);
+	}
+else
+	{
+	y = powl( x, x - 0.5L ) / y;
+	}
+y = SQTPI * y * w;
+return( y );
+}
+
+
+long double __tgammal_r(long double x, int* sgngaml)
+{
+long double p, q, z;
+int i;
+
+*sgngaml = 1;
+#ifdef NANS
+if( isnanl(x) )
+	return(NANL);
+#endif
+#ifdef INFINITIES
+#ifdef NANS
+if( x == INFINITYL )
+	return(x);
+if( x == -INFINITYL )
+	return(NANL);
+#else
+if( !isfinite(x) )
+	return(x);
+#endif
+#endif
+q = fabsl(x);
+
+if( q > 13.0L )
+	{
+	if( q > MAXGAML )
+		goto goverf;
+	if( x < 0.0L )
+		{
+		p = floorl(q);
+		if( p == q )
+			{
+gsing:
+			_SET_ERRNO(EDOM);
+			mtherr( "tgammal", SING );
+#ifdef INFINITIES
+			return (INFINITYL);
+#else
+			return( *sgngaml * MAXNUML);
+#endif
+			}
+		i = p;
+		if( (i & 1) == 0 )
+			*sgngaml = -1;
+		z = q - p;
+		if( z > 0.5L )
+			{
+			p += 1.0L;
+			z = q - p;
+			}
+		z = q * sinl( PIL * z );
+		z = fabsl(z) * stirf(q);
+		if( z <= PIL/MAXNUML )
+			{
+goverf:
+			_SET_ERRNO(ERANGE);
+			mtherr( "tgammal", OVERFLOW );
+#ifdef INFINITIES
+			return( *sgngaml * INFINITYL);
+#else
+			return( *sgngaml * MAXNUML);
+#endif
+			}
+		z = PIL/z;
+		}
+	else
+		{
+		z = stirf(x);
+		}
+	return( *sgngaml * z );
+	}
+
+z = 1.0L;
+while( x >= 3.0L )
+	{
+	x -= 1.0L;
+	z *= x;
+	}
+
+while( x < -0.03125L )
+	{
+	z /= x;
+	x += 1.0L;
+	}
+
+if( x <= 0.03125L )
+	goto small;
+
+while( x < 2.0L )
+	{
+	z /= x;
+	x += 1.0L;
+	}
+
+if( x == 2.0L )
+	return(z);
+
+x -= 2.0L;
+p = polevll( x, P, 7 );
+q = polevll( x, Q, 8 );
+return( z * p / q );
+
+small:
+if( x == 0.0L )
+	{
+	goto gsing;
+	}
+else
+	{
+	if( x < 0.0L )
+		{
+		x = -x;
+		q = z / (x * polevll( x, SN, 8 ));
+		}
+	else
+		q = z / (x * polevll( x, S, 8 ));
+	}
+return q;
+}
+
+
+/* This is the C99 version. */
+
+long double tgammal(long double x)
+{
+  int local_sgngaml=0;
+  return (__tgammal_r(x, &local_sgngaml));
+}
+