LIBM_QUADRUPLE(3F)LIBM_QUADRUPLE(3F)NAMElibm_quadruple - FORTRAN access to quadruple-precision functions (SPARC
only)
SYNOPSIS
Example for non-intrinsics:
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 )
Quad functions used are in a REAL*16 statement.
DESCRIPTION
These functions provide access to quadruple-precision libm functions.
asind(x), sind(x), and so on involve degrees, rather than radians.
INTRINSICS
The following FORTRAN intrinsic functions return quadruple precision
values if their arguments are quadruple 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 c, l, p, s, u, x, and y are REAL*16.
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
These functions do not correspond to standard FORTRAN generic intrinsic
functions, so their data types are determined by the usual FORTRAN data
typing rules.
If you use one of these quad functions, put it into a REAL*16 state‐
ment, or type it with IMPLICIT.
For meanings of routines and arguments, do a man command on the routine
name without the q_; the output is a C man page for the double preci‐
sion function, but the meanings are the same.
Variables c, l, p, s, u, x, and y are REAL*16.
q_copysign( x, y ) real*16 function
q_fabs( x ) real*16 function
q_fmod( x ) real*16 function
q_infinity( ) real*16 function
iq_finite( x ) integer function
iq_fp_class( x ) integer function
iq_ilogb( x ) integer function
iq_isinf( x ) integer function
iq_isnan( x ) integer function
iq_isnormal( x ) integer function
iq_issubnormal( x ) integer function
iq_iszero( x ) integer function
iq_signbit( x ) integer function
q_max_normal() real*16 function
q_max_subnormal() real*16 function
q_min_normal() real*16 function
q_min_subnormal() real*16 function
q_nextafter( x, y ) real*16 function
q_quiet_nan( n ) real*16 function
q_remainder( x, y ) real*16 function
q_scalbn( x, n ) real*16 function
q_signaling_nan( n ) real*16 function
If you need to use any other quadruple-precision libm function, you can
call a C function that calls the libm function.
FILES
libm.a
SEE ALSOintro(3M)
Numerical Computation Guide
FORTRAN 77 Reference Manual
07 July 1995 LIBM_QUADRUPLE(3F)
