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-rw-r--r--libm/ldouble/gdtrl.c130
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diff --git a/libm/ldouble/gdtrl.c b/libm/ldouble/gdtrl.c
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-/* gdtrl.c
- *
- * Gamma distribution function
- *
- *
- *
- * SYNOPSIS:
- *
- * long double a, b, x, y, gdtrl();
- *
- * y = gdtrl( a, b, x );
- *
- *
- *
- * DESCRIPTION:
- *
- * Returns the integral from zero to x of the gamma probability
- * density function:
- *
- *
- * x
- * b -
- * a | | b-1 -at
- * y = ----- | t e dt
- * - | |
- * | (b) -
- * 0
- *
- * The incomplete gamma integral is used, according to the
- * relation
- *
- * y = igam( b, ax ).
- *
- *
- * ACCURACY:
- *
- * See igam().
- *
- * ERROR MESSAGES:
- *
- * message condition value returned
- * gdtrl domain x < 0 0.0
- *
- */
- /* gdtrcl.c
- *
- * Complemented gamma distribution function
- *
- *
- *
- * SYNOPSIS:
- *
- * long double a, b, x, y, gdtrcl();
- *
- * y = gdtrcl( a, b, x );
- *
- *
- *
- * DESCRIPTION:
- *
- * Returns the integral from x to infinity of the gamma
- * probability density function:
- *
- *
- * inf.
- * b -
- * a | | b-1 -at
- * y = ----- | t e dt
- * - | |
- * | (b) -
- * x
- *
- * The incomplete gamma integral is used, according to the
- * relation
- *
- * y = igamc( b, ax ).
- *
- *
- * ACCURACY:
- *
- * See igamc().
- *
- * ERROR MESSAGES:
- *
- * message condition value returned
- * gdtrcl domain x < 0 0.0
- *
- */
-
-/* gdtrl() */
-
-
-/*
-Cephes Math Library Release 2.3: March, 1995
-Copyright 1984, 1995 by Stephen L. Moshier
-*/
-
-#include <math.h>
-#ifdef ANSIPROT
-extern long double igaml ( long double, long double );
-extern long double igamcl ( long double, long double );
-#else
-long double igaml(), igamcl();
-#endif
-
-long double gdtrl( a, b, x )
-long double a, b, x;
-{
-
-if( x < 0.0L )
- {
- mtherr( "gdtrl", DOMAIN );
- return( 0.0L );
- }
-return( igaml( b, a * x ) );
-}
-
-
-
-long double gdtrcl( a, b, x )
-long double a, b, x;
-{
-
-if( x < 0.0L )
- {
- mtherr( "gdtrcl", DOMAIN );
- return( 0.0L );
- }
-return( igamcl( b, a * x ) );
-}