[RFA?] Add missing functionality to some math functions

[Jeff Johnston]

Christopher Faylor wrote:
> Do the below patches make any sense?  It seems like the non-reentrant versions
> of some of the gamma functions in the libm/mathfp directory are missing.
>

Yes, thanks for noting this.  Feel free to check the code in.

-- Jeff J.

> cgf
> 
> Index: libm/mathfp/er_gamma.c
> ===================================================================
> RCS file: /cvs/uberbaum/newlib/libm/mathfp/er_gamma.c,v
> retrieving revision 1.4
> diff -u -p -r1.4 er_gamma.c
> --- libm/mathfp/er_gamma.c	5 Dec 2003 06:15:18 -0000	1.4
> +++ libm/mathfp/er_gamma.c	9 Feb 2004 02:31:38 -0000
> @@ -30,3 +30,8 @@
>  {
>  	return exp (lgamma_r(x,signgamp));
>  }
> +
> +double gamma(double x)
> +{
> +  return gamma_r(x, &(_REENT_SIGNGAM(_REENT)));
> +}
> Index: libm/mathfp/er_lgamma.c
> ===================================================================
> RCS file: /cvs/uberbaum/newlib/libm/mathfp/er_lgamma.c,v
> retrieving revision 1.5
> diff -u -p -r1.5 er_lgamma.c
> --- libm/mathfp/er_lgamma.c	5 Dec 2003 06:15:18 -0000	1.5
> +++ libm/mathfp/er_lgamma.c	9 Feb 2004 02:31:39 -0000
> @@ -422,3 +422,9 @@ static double zero=  0.00000000000000000
>  	if(hx<0) r = nadj - r;
>  	return r;
>  }
> +
> +double
> +lgamma(double x)
> +{
> +  return lgamma_r(x, &(_REENT_SIGNGAM(_REENT)));
> +}
> Index: libm/mathfp/erf_gamma.c
> ===================================================================
> RCS file: /cvs/uberbaum/newlib/libm/mathfp/erf_gamma.c,v
> retrieving revision 1.4
> diff -u -p -r1.4 erf_gamma.c
> --- libm/mathfp/erf_gamma.c	5 Dec 2003 06:15:18 -0000	1.4
> +++ libm/mathfp/erf_gamma.c	9 Feb 2004 02:31:39 -0000
> @@ -16,7 +16,7 @@
>  
>  /* gammaf_r(x, signgamp)
>   * Reentrant version of the logarithm of the Gamma function 
> - * with user provide pointer for the sign of Gamma(x). 
> + * with user provided pointer for the sign of Gamma(x). 
>   *
>   * Method: See lgammaf_r
>   */
> @@ -31,4 +31,9 @@
>  #endif
>  {
>  	return expf (lgammaf_r(x,signgamp));
> +}
> +
> +float gammaf(float x)
> +{
> +  return gammaf_r(x, &(_REENT_SIGNGAM(_REENT)));
>  }
> Index: libm/mathfp/erf_lgamma.c
> ===================================================================
> RCS file: /cvs/uberbaum/newlib/libm/mathfp/erf_lgamma.c,v
> retrieving revision 1.4
> diff -u -p -r1.4 erf_lgamma.c
> --- libm/mathfp/erf_lgamma.c	5 Dec 2003 06:15:18 -0000	1.4
> +++ libm/mathfp/erf_lgamma.c	9 Feb 2004 02:31:39 -0000
> @@ -244,3 +244,8 @@ static float zero=  0.0000000000e+00;
>  	if(hx<0) r = nadj - r;
>  	return r;
>  }
> +
> +float lgammaf(float x)
> +{
> +  return lgammaf_r(x, &(_REENT_SIGNGAM(_REENT)));
> +}