libm_quadruple: Quad-Precision Functions (Fortran Library Reference)

Fortran Library Reference

`libm_quadruple`: Quad-Precision Functions

These subprograms are quadruple-precision (REAL*16) libm functions and subroutines (SPARC only).

In general, these do not correspond to standard generic intrinsic functions; data types are determined by the usual data typing rules.

Samples: Quadruple precision functions:

    REAL*16 c, q_acosh, q_hypot, q_infinity, s, x, y, z 
    ... 
    z = q_acosh( x ) 
    i = iq_finite( x ) 
    z = q_hypot( x, y ) 
    z = q_infinity() 
    CALL q_sincos( x, s, c )

The quadruple precision functions must appear in a REAL*16 statement

Table 1-6 Quadruple-Precision libm Functions


`q_copysign( x, y )` `q_fabs( x )` `q_fmod( x )` `q_infinity( )`	`REAL16` `REAL16` `REAL16` `REAL16`	`Function` `Function` `Function` `Function`
`iq_finite( x )` `iq_fp_class( x )` `iq_ilogb( x )` `iq_isinf( x )` `iq_isnan( x )` `iq_isnormal( x )` `iq_issubnormal( x )` `iq_iszero( x )` `iq_signbit( x )`	`INTEGER` `INTEGER` `INTEGER` `INTEGER` `INTEGER` `INTEGER` `INTEGER` `INTEGER` `INTEGER`	`Function` `Function` `Function` `Function` `Function` `Function` `Function` `Function` `Function`
`q_max_normal()` `q_max_subnormal()` `q_min_normal()` `q_min_subnormal()` `q_nextafter( x, y )` `q_quiet_nan( n )` `q_remainder( x, y )` `q_scalbn( x, n )` `q_signaling_nan( n )`	`REAL16` `REAL16` `REAL16` `REAL16` `REAL16` `REAL16` `REAL16` `REAL16` `REAL*16`	`Function` `Function` `Function` `Function` `Function` `Function` `Function` `Function` `Function`

The variables c, l, p, s, u, x, and y are of type quadruple precision.

Explicitly type these functions with a REAL*16 statement or with an appropriate IMPLICIT statement.

sind(x), asind(x), ... take degrees rather than radians.

If you need to use any other quadruple-precision libm function, you can call it using $PRAGMA C(fcn) before the call. For details, see the chapter on the C-FORTRAN interface in the Fortran Programming Guide.