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NAME
     libm_double - FORTRAN access to double precision libm  func-
     tions and subroutines

SYNOPSIS
     Example for non-intrinsics:
     DOUBLE PRECISION c, d_acosh, d_hypot, d_infinity, s, x, y, z
       ...
     z = d_acosh( x )
     i = id_finite( x )
     z = d_hypot( x, y )
     z = d_infinity()
     CALL d_sincos( x, s, c )

     Put any function used into a DOUBLE PRECISION statement.

DESCRIPTION
     These subprograms provide access to  double  precision  libm
     functions  and  subroutines.  asind(x),  sind(x),  and so on
     involve degrees, rather than radians.

INTRINSICS
     The following FORTRAN intrinsic functions return double pre-
     cision  values if their arguments are double precision.  You
     need not put them in a  type  statement.   If  the  function
     needed  is available as an intrinsic function, it is simpler
     to use an intrinsic than a non-intrinsic function.

     The variables x and y are of type double precision.

     sqrt(x)    asin(x)      acosd(x)*
     log(x)     acos(x)      asind(x)*
     log10(x)   atan(x)      acosd(x)*
     exp(x)     atan2(x,y)   atand(x)*
     x**y       sinh(x)      atan2d(x,y)*
     sin(x)     cosh(x)*     aint(x)
     cos(x)     tanh(x)*     anint(x)
     tan(x)     sind(x)*     nint(x)

     * = nonstandard: it is an extension that this is intrinsic



NON-INTRINSIC FUNCTIONS AND SUBROUTINES
     In general, these functions do not  correspond  to  standard
     FORTRAN generic intrinsic functions, so their data types are
     determined by the usual FORTRAN data typing rules.

     Caveat:  If you use one of these DOUBLE PRECISION functions,
     put it into a DOUBLE PRECISION statement, or type it by some
     IMPLICIT statement).

     For meanings of routines and arguments, do a man command  on
     the routine name without the d_; the output is a C man page,
     but the meanings are the same.

     The variables c, l, p, s, u, x, and y are double precision.

     d_acos( x )                double precision    function
     d_acosd( x )               double precision    function
     d_acosh( x )               double precision    function
     d_acosp( x )               double precision    function
     d_acospi( x )              double precision    function

     d_atan( x )                double precision    function
     d_atand( x )               double precision    function
     d_atanh( x )               double precision    function
     d_atanp( x )               double precision    function
     d_atanpi( x )              double precision    function

     d_asin( x )                double precision    function
     d_asind( x )               double precision    function
     d_asinh( x )               double precision    function
     d_asinp( x )               double precision    function
     d_asinpi( x )              double precision    function

     d_atan2(( y, x )           double precision    function
     d_atan2d( y, x )           double precision    function
     d_atan2pi( y, x )          double precision    function

     d_cbrt( x )                double precision    function
     d_ceil( x )                double precision    function
     d_copysign( x, y )         double precision    function

     d_cos( x )                 double precision    function
     d_cosd( x )                double precision    function
     d_cosh( x )                double precision    function
     d_cosp( x )                double precision    function
     d_cospi( x )               double precision    function

     d_erf( x )                 double precision    function
     d_erfc( x )                double precision    function
     d_expm1( x )               double precision    function
     d_floor( x )               double precision    function
     d_hypot( x, y )            double precision    function
     d_infinity( )              double precision    function

     d_j0( x )                  double precision    function
     d_j1( x )                  double precision    function
     d_jn( x )                  double precision    function

     id_finite( x )             integer             function
     id_fp_class( x )           integer             function
     id_ilogb( x )              integer             function
     id_irint( x )              integer             function
     id_isinf( x )              integer             function
     id_isnan( x )              integer             function
     id_isnormal( x )           integer             function
     id_issubnormal( x )        integer             function
     id_iszero( x )             integer             function
     id_signbit( x  )           integer             function

     d_addran()                 double precision    function
     d_addrans( x, p, l, u )    n/a                 subroutine
     d_lcran()                  double precision    function
     d_lcrans( x, p, l, u )     n/a                 subroutine
     d_shufrans(x, p, l, u)     n/a                 subroutine

     d_lgamma( x )              double precision    function
     d_logb( x )                double precision    function
     d_log1p( x )               double precision    function
     d_log2( x )                double precision    function

     d_max_normal()             double precision    function
     d_max_subnormal()          double precision    function
     d_min_normal()             double precision    function
     d_min_subnormal()          double precision    function
     d_nextafter( x, y )        double precision    function
     d_quiet_nan( n )           double precision    function
     d_remainder( x, y )        double precision    function
     d_rint( x )                double precision    function
     d_scalb( x, y )            double precision    function
     d_scalbn( x, n )           double precision    function
     d_signaling_nan( n )       double precision    function
     d_significand( x )         double precision    function

     d_sin( x )                 double precision    function
     d_sind( x )                double precision    function
     d_sinh( x )                double precision    function
     d_sinp( x )                double precision    function
     d_sinpi( x )               double precision    function

     d_sincos( x, s, c )        n/a                 subroutine
     d_sincosd( x, s, c )       n/a                 subroutine
     d_sincosp( x, s, c )       n/a                 subroutine
     d_sincospi( x, s, c )      n/a                 subroutine

     d_tan( x )                 double precision    function
     d_tand( x )                double precision    function
     d_tanh( x )                double precision    function
     d_tanp( x )                double precision    function
     d_tanpi( x )               double precision    function

     d_y0( x )                  double precision    function
     d_y1( x )                  double precision    function
     d_yn( n,x )                double precision    function

     If you need to use any other double precision libm function,
     you can call a C function that calls the libm function.

FILES
     libm.a

SEE ALSO
     intro(3M)
     FORTRAN 77 Reference Manual
     Numerical Computation Guide

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