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invoke.texi: Add -freal-4-real-16.

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2013-12-10  Janus Weil  <janus@gcc.gnu.org>

	* invoke.texi: Add -freal-4-real-16. Rearrange kind promotion options.

From-SVN: r205839
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Janus Weil 2013-12-10 00:41:23 +01:00
parent 787f341b9d
commit 9803c5f0a8
2 changed files with 39 additions and 34 deletions
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gcc/fortran/ChangeLog
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@ -1,3 +1,7 @@
2013-12-10 Janus Weil <janus@gcc.gnu.org>
* invoke.texi: Add -freal-4-real-16. Rearrange kind promotion options.
2013-12-08 Tobias Burnus <burnus@net-b.de>
Janus Weil <janus@gcc.gnu.org>

69
gcc/fortran/invoke.texi
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@ -227,29 +227,6 @@ given they are treated as if the first column contained a blank. If the
@option{-fd-lines-as-comments} option is given, they are treated as
comment lines.
@item -fdefault-double-8
@opindex @code{fdefault-double-8}
Set the @code{DOUBLE PRECISION} type to an 8 byte wide type. If
@option{-fdefault-real-8} is given, @code{DOUBLE PRECISION} would
instead be promoted to 16 bytes if possible, and @option{-fdefault-double-8}
can be used to prevent this. The kind of real constants like @code{1.d0} will
not be changed by @option{-fdefault-real-8} though, so also
@option{-fdefault-double-8} does not affect it.
@item -fdefault-integer-8
@opindex @code{fdefault-integer-8}
Set the default integer and logical types to an 8 byte wide type.
Do nothing if this is already the default. This option also affects
the kind of integer constants like @code{42}.
@item -fdefault-real-8
@opindex @code{fdefault-real-8}
Set the default real type to an 8 byte wide type.
Do nothing if this is already the default. This option also affects
the kind of non-double real constants like @code{1.0}, and does promote
the default width of @code{DOUBLE PRECISION} to 16 bytes if possible, unless
@code{-fdefault-double-8} is given, too.
@item -fdollar-ok
@opindex @code{fdollar-ok}
@cindex @code{$}
@ -320,17 +297,6 @@ Specify that no implicit typing is allowed, unless overridden by explicit
@code{IMPLICIT} statements. This is the equivalent of adding
@code{implicit none} to the start of every procedure.
@item -finteger-4-integer-8
@opindex @code{finteger-4-integer-8}
Promote all @code{INTEGER(KIND=4)} entities to an @code{INTEGER(KIND=8)}
entities. If @code{KIND=8} is unavailable, then an error will be issued.
This option should be used with care and may not be suitable for your codes.
Areas of possible concern include calls to external procedures,
alignment in @code{EQUIVALENCE} and/or @code{COMMON}, generic interfaces,
BOZ literal constant conversion, and I/O. Inspection of the intermediate
representation of the translated Fortran code, produced by
@option{-fdump-tree-original}, is suggested.
@item -fcray-pointer
@opindex @code{fcray-pointer}
Enable the Cray pointer extension, which provides C-like pointer
@ -361,8 +327,43 @@ Similarly, @code{DATA i/Z'FFFFFFFF'/} will result in an integer overflow
on most systems, but with @option{-fno-range-check} the value will
``wrap around'' and @code{i} will be initialized to @math{-1} instead.
@item -fdefault-integer-8
@opindex @code{fdefault-integer-8}
Set the default integer and logical types to an 8 byte wide type.
Do nothing if this is already the default. This option also affects
the kind of integer constants like @code{42}.
@item -fdefault-real-8
@opindex @code{fdefault-real-8}
Set the default real type to an 8 byte wide type.
Do nothing if this is already the default. This option also affects
the kind of non-double real constants like @code{1.0}, and does promote
the default width of @code{DOUBLE PRECISION} to 16 bytes if possible, unless
@code{-fdefault-double-8} is given, too.
@item -fdefault-double-8
@opindex @code{fdefault-double-8}
Set the @code{DOUBLE PRECISION} type to an 8 byte wide type. If
@option{-fdefault-real-8} is given, @code{DOUBLE PRECISION} would
instead be promoted to 16 bytes if possible, and @option{-fdefault-double-8}
can be used to prevent this. The kind of real constants like @code{1.d0} will
not be changed by @option{-fdefault-real-8} though, so also
@option{-fdefault-double-8} does not affect it.
@item -finteger-4-integer-8
@opindex @code{finteger-4-integer-8}
Promote all @code{INTEGER(KIND=4)} entities to an @code{INTEGER(KIND=8)}
entities. If @code{KIND=8} is unavailable, then an error will be issued.
This option should be used with care and may not be suitable for your codes.
Areas of possible concern include calls to external procedures,
alignment in @code{EQUIVALENCE} and/or @code{COMMON}, generic interfaces,
BOZ literal constant conversion, and I/O. Inspection of the intermediate
representation of the translated Fortran code, produced by
@option{-fdump-tree-original}, is suggested.
@item -freal-4-real-8
@itemx -freal-4-real-10
@itemx -freal-4-real-16
@itemx -freal-8-real-4
@itemx -freal-8-real-10
@itemx -freal-8-real-16