intdoc.texi

gcc-2.95.3 Linux下最常用的C编译器

Returns the arc-tangent (inverse tangent) of the complex
number (@var{Y}, @var{X}) in radians.

@xref{Tan Intrinsic}, for the inverse of this function.

@end ifset
@ifset familyVXT
@node ATan2D Intrinsic
@subsubsection ATan2D Intrinsic
@cindex ATan2D intrinsic
@cindex intrinsics, ATan2D

This intrinsic is not yet implemented.
The name is, however, reserved as an intrinsic.
Use @samp{EXTERNAL ATan2D} to use this name for an
external procedure.

@node ATanD Intrinsic
@subsubsection ATanD Intrinsic
@cindex ATanD intrinsic
@cindex intrinsics, ATanD

This intrinsic is not yet implemented.
The name is, however, reserved as an intrinsic.
Use @samp{EXTERNAL ATanD} to use this name for an
external procedure.

@end ifset
@ifset familyF2U
@node BesJ0 Intrinsic
@subsubsection BesJ0 Intrinsic
@cindex BesJ0 intrinsic
@cindex intrinsics, BesJ0

@noindent
@example
BesJ0(@var{X})
@end example

@noindent
BesJ0: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the first kind of order 0 of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@node BesJ1 Intrinsic
@subsubsection BesJ1 Intrinsic
@cindex BesJ1 intrinsic
@cindex intrinsics, BesJ1

@noindent
@example
BesJ1(@var{X})
@end example

@noindent
BesJ1: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the first kind of order 1 of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@node BesJN Intrinsic
@subsubsection BesJN Intrinsic
@cindex BesJN intrinsic
@cindex intrinsics, BesJN

@noindent
@example
BesJN(@var{N}, @var{X})
@end example

@noindent
BesJN: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{N}: @code{INTEGER}; scalar; INTENT(IN).

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the first kind of order @var{N} of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@node BesY0 Intrinsic
@subsubsection BesY0 Intrinsic
@cindex BesY0 intrinsic
@cindex intrinsics, BesY0

@noindent
@example
BesY0(@var{X})
@end example

@noindent
BesY0: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the second kind of order 0 of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@node BesY1 Intrinsic
@subsubsection BesY1 Intrinsic
@cindex BesY1 intrinsic
@cindex intrinsics, BesY1

@noindent
@example
BesY1(@var{X})
@end example

@noindent
BesY1: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the second kind of order 1 of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@node BesYN Intrinsic
@subsubsection BesYN Intrinsic
@cindex BesYN intrinsic
@cindex intrinsics, BesYN

@noindent
@example
BesYN(@var{N}, @var{X})
@end example

@noindent
BesYN: @code{REAL} function, the @samp{KIND=} value of the type being that of argument @var{X}.

@noindent
@var{N}: @code{INTEGER}; scalar; INTENT(IN).

@noindent
@var{X}: @code{REAL}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{unix}.

@noindent
Description:

Calculates the Bessel function of the second kind of order @var{N} of @var{X}.
See @code{bessel(3m)}, on whose implementation the function depends.
@end ifset
@ifset familyVXT
@node BITest Intrinsic
@subsubsection BITest Intrinsic
@cindex BITest intrinsic
@cindex intrinsics, BITest

This intrinsic is not yet implemented.
The name is, however, reserved as an intrinsic.
Use @samp{EXTERNAL BITest} to use this name for an
external procedure.

@end ifset
@ifset familyF90
@node Bit_Size Intrinsic
@subsubsection Bit_Size Intrinsic
@cindex Bit_Size intrinsic
@cindex intrinsics, Bit_Size

@noindent
@example
Bit_Size(@var{I})
@end example

@noindent
Bit_Size: @code{INTEGER} function, the @samp{KIND=} value of the type being that of argument @var{I}.

@noindent
@var{I}: @code{INTEGER}; scalar.

@noindent
Intrinsic groups: @code{f90}.

@noindent
Description:

Returns the number of bits (integer precision plus sign bit)
represented by the type for @var{I}.

@xref{BTest Intrinsic}, for how to test the value of a
bit in a variable or array.

@xref{IBSet Intrinsic}, for how to set a bit in a variable to 1.

@xref{IBClr Intrinsic}, for how to set a bit in a variable to 0.


@end ifset
@ifset familyVXT
@node BJTest Intrinsic
@subsubsection BJTest Intrinsic
@cindex BJTest intrinsic
@cindex intrinsics, BJTest

This intrinsic is not yet implemented.
The name is, however, reserved as an intrinsic.
Use @samp{EXTERNAL BJTest} to use this name for an
external procedure.

@end ifset
@ifset familyMIL
@node BTest Intrinsic
@subsubsection BTest Intrinsic
@cindex BTest intrinsic
@cindex intrinsics, BTest

@noindent
@example
BTest(@var{I}, @var{Pos})
@end example

@noindent
BTest: @code{LOGICAL(KIND=1)} function.

@noindent
@var{I}: @code{INTEGER}; scalar; INTENT(IN).

@noindent
@var{Pos}: @code{INTEGER}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{mil}, @code{f90}, @code{vxt}.

@noindent
Description:

Returns @code{.TRUE.} if bit @var{Pos} in @var{I} is
1, @code{.FALSE.} otherwise.

(Bit 0 is the low-order (rightmost) bit, adding the value 
@ifinfo
2**0,
@end ifinfo
@iftex
@tex
$2^0$,
@end tex
@end iftex
or 1,
to the number if set to 1;
bit 1 is the next-higher-order bit, adding 
@ifinfo
2**1,
@end ifinfo
@iftex
@tex
$2^1$,
@end tex
@end iftex
or 2;
bit 2 adds 
@ifinfo
2**2,
@end ifinfo
@iftex
@tex
$2^2$,
@end tex
@end iftex
or 4; and so on.)

@xref{Bit_Size Intrinsic}, for how to obtain the number of bits
in a type.
The leftmost bit of @var{I} is @samp{BIT_SIZE(@var{I}-1)}.

@end ifset
@ifset familyF77
@node CAbs Intrinsic
@subsubsection CAbs Intrinsic
@cindex CAbs intrinsic
@cindex intrinsics, CAbs

@noindent
@example
CAbs(@var{A})
@end example

@noindent
CAbs: @code{REAL(KIND=1)} function.

@noindent
@var{A}: @code{COMPLEX(KIND=1)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: (standard FORTRAN 77).

@noindent
Description:

Archaic form of @code{ABS()} that is specific
to one type for @var{A}.
@xref{Abs Intrinsic}.

@node CCos Intrinsic
@subsubsection CCos Intrinsic
@cindex CCos intrinsic
@cindex intrinsics, CCos

@noindent
@example
CCos(@var{X})
@end example

@noindent
CCos: @code{COMPLEX(KIND=1)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=1)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: (standard FORTRAN 77).

@noindent
Description:

Archaic form of @code{COS()} that is specific
to one type for @var{X}.
@xref{Cos Intrinsic}.

@end ifset
@ifset familyFVZ
@node CDAbs Intrinsic
@subsubsection CDAbs Intrinsic
@cindex CDAbs intrinsic
@cindex intrinsics, CDAbs

@noindent
@example
CDAbs(@var{A})
@end example

@noindent
CDAbs: @code{REAL(KIND=2)} function.

@noindent
@var{A}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{ABS()} that is specific
to one type for @var{A}.
@xref{Abs Intrinsic}.

@node CDCos Intrinsic
@subsubsection CDCos Intrinsic
@cindex CDCos intrinsic
@cindex intrinsics, CDCos

@noindent
@example
CDCos(@var{X})
@end example

@noindent
CDCos: @code{COMPLEX(KIND=2)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{COS()} that is specific
to one type for @var{X}.
@xref{Cos Intrinsic}.

@node CDExp Intrinsic
@subsubsection CDExp Intrinsic
@cindex CDExp intrinsic
@cindex intrinsics, CDExp

@noindent
@example
CDExp(@var{X})
@end example

@noindent
CDExp: @code{COMPLEX(KIND=2)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{EXP()} that is specific
to one type for @var{X}.
@xref{Exp Intrinsic}.

@node CDLog Intrinsic
@subsubsection CDLog Intrinsic
@cindex CDLog intrinsic
@cindex intrinsics, CDLog

@noindent
@example
CDLog(@var{X})
@end example

@noindent
CDLog: @code{COMPLEX(KIND=2)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{LOG()} that is specific
to one type for @var{X}.
@xref{Log Intrinsic}.

@node CDSin Intrinsic
@subsubsection CDSin Intrinsic
@cindex CDSin intrinsic
@cindex intrinsics, CDSin

@noindent
@example
CDSin(@var{X})
@end example

@noindent
CDSin: @code{COMPLEX(KIND=2)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{SIN()} that is specific
to one type for @var{X}.
@xref{Sin Intrinsic}.

@node CDSqRt Intrinsic
@subsubsection CDSqRt Intrinsic
@cindex CDSqRt intrinsic
@cindex intrinsics, CDSqRt

@noindent
@example
CDSqRt(@var{X})
@end example

@noindent
CDSqRt: @code{COMPLEX(KIND=2)} function.

@noindent
@var{X}: @code{COMPLEX(KIND=2)}; scalar; INTENT(IN).

@noindent
Intrinsic groups: @code{f2c}, @code{vxt}.

@noindent
Description:

Archaic form of @code{SQRT()} that is specific
to one type for @var{X}.
@xref{SqRt Intrinsic}.

@end ifset
@ifset familyF90
@node Ceiling Intrinsic
@subsubsection Ceiling Intrinsic
@cindex Ceiling intrinsic
@cindex intrinsics, Ceiling

This intrinsic is not yet implemented.
The name is, however, reserved as an intrinsic.
Use @samp{EXTERNAL Ceiling} to use this name for an
external procedure.