OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR fortran/52884 (double precision constants promoted to 16 byte by -fdefault-real-8) 

2019-01-30  Dominique d'Humieres  <dominiq@gcc.gnu.org>

	PR fortran/52884
	* invoke.texi: Document the promotion of double precision
	constants.

From-SVN: r268396
This commit is contained in:
Dominique d'Humieres 2019-01-30 16:53:51 +01:00
parent 2eb8a3e56f
commit 8ff7780cb2
2 changed files with 36 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/fortran/ChangeLog
View File

@ -1,3 +1,9 @@
2019-01-30 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR fortran/52884
* invoke.texi: Document the promotion of double precision
constants.
2019-01-29 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/57048

51
gcc/fortran/invoke.texi
View File

@ -416,36 +416,45 @@ kind declaration.
@item -fdefault-real-8
@opindex @code{fdefault-real-8}
Set the default real type to an 8 byte wide type. 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. Unlike @option{-freal-4-real-8},
it does not promote variables with explicit kind declaration.
Set the default real type to an 8 byte wide type. This option also affects
the kind of non-double real constants like @code{1.0}. This option promotes
the default width of @code{DOUBLE PRECISION} and double real constants
like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
is given along with @code{fdefault-real-8}, @code{DOUBLE PRECISION}
and double real constants are not promoted. Unlike @option{-freal-4-real-8},
@code{fdefault-real-8} does not promote variables with explicit kind
declarations.
@item -fdefault-real-10
@opindex @code{fdefault-real-10}
Set the default real type to a 10 byte wide type. 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. Unlike @option{-freal-4-real-10},
it does not promote variables with explicit kind declaration.
Set the default real type to an 10 byte wide type. This option also affects
the kind of non-double real constants like @code{1.0}. This option promotes
the default width of @code{DOUBLE PRECISION} and double real constants
like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
is given along with @code{fdefault-real-10}, @code{DOUBLE PRECISION}
and double real constants are not promoted. Unlike @option{-freal-4-real-10},
@code{fdefault-real-10} does not promote variables with explicit kind
declarations.
@item -fdefault-real-16
@opindex @code{fdefault-real-16}
Set the default real type to a 16 byte wide type. 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. Unlike @option{-freal-4-real-16},
it does not promote variables with explicit kind declaration.
Set the default real type to an 16 byte wide type. This option also affects
the kind of non-double real constants like @code{1.0}. This option promotes
the default width of @code{DOUBLE PRECISION} and double real constants
like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
is given along with @code{fdefault-real-16}, @code{DOUBLE PRECISION}
and double real constants are not promoted. Unlike @option{-freal-4-real-16},
@code{fdefault-real-16} does not promote variables with explicit kind
declarations.
@item -fdefault-double-8
@opindex @code{fdefault-double-8}
Set the @code{DOUBLE PRECISION} type to an 8 byte wide type. Do nothing if this
is already the default. 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.
Set the @code{DOUBLE PRECISION} type and double real constants
like @code{1.d0} to an 8 byte wide type. Do nothing if this
is already the default. This option prevents @option{-fdefault-real-8},
@option{-fdefault-real-10}, and @option{-fdefault-real-16},
from promoting @code{DOUBLE PRECISION} and double real constants like
@code{1.d0} to 16 bytes.
@item -finteger-4-integer-8
@opindex @code{finteger-4-integer-8}