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| author | Craig Burley <craig@jcb-sc.com> | 1999-04-02 10:37:16 +0000 |
|---|---|---|
| committer | Craig Burley <burley@gcc.gnu.org> | 1999-04-02 05:37:16 -0500 |
| commit | 7cceca3288eed1bee6b0d258e7578b6a786ad7c4 (patch) | |
| tree | 6806eeaa3b42f49a96f53b48f34af9b6a41281f5 | |
| parent | 68b14c7178614d82f353c63497e556d7f84f5c4f (diff) | |
| download | gcc-7cceca3288eed1bee6b0d258e7578b6a786ad7c4.zip gcc-7cceca3288eed1bee6b0d258e7578b6a786ad7c4.tar.gz gcc-7cceca3288eed1bee6b0d258e7578b6a786ad7c4.tar.bz2 | |
The -malign-double option now works
From-SVN: r26114
| -rw-r--r-- | gcc/f/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/f/g77.texi | 20 | ||||
| -rw-r--r-- | gcc/f/news.texi | 10 |
3 files changed, 24 insertions, 12 deletions
diff --git a/gcc/f/ChangeLog b/gcc/f/ChangeLog index a5ec467..f54463c 100644 --- a/gcc/f/ChangeLog +++ b/gcc/f/ChangeLog @@ -1,3 +1,9 @@ +Fri Apr 2 13:33:16 1999 Craig Burley <craig@jcb-sc.com> + + * g77.texi: -malign-double now works. + Give URL for alignment-testing package. + * news.texi: -malign-double now works. + Fri Apr 2 12:49:12 1999 Craig Burley <craig@jcb-sc.com> * g77.texi (Funding GNU Fortran): Dude's got a web page. diff --git a/gcc/f/g77.texi b/gcc/f/g77.texi index 8af9407..225345f 100644 --- a/gcc/f/g77.texi +++ b/gcc/f/g77.texi @@ -2704,11 +2704,7 @@ and data sets. this option does not apply, generally speaking, to Fortran code compiled by @code{g77}. -@emph{Also note:} @samp{-malign-double} applies only to -statically-allocated data. -Double-precision data on the stack can still -cause problems due to misalignment. -@xref{Aligned Data}. +@xref{Aligned Data}, for more information on alignment issues. @emph{Also also note:} The negative form of @samp{-malign-double} is @samp{-mno-align-double}, not @samp{-benign-double}. @@ -10470,6 +10466,7 @@ it working). @node Aligned Data @subsection Aligned Data +@cindex alignment @cindex data, aligned @cindex stack, aligned @cindex aligned data @@ -10571,12 +10568,6 @@ of the FORTRAN 77 standard, or uses @code{EQUIVALENCE} or different layouts in ways that assume no padding is ever inserted by the compiler. -@emph{Note:} @samp{-malign-double} applies only to -statically-allocated data. -Double-precision data on the stack can still -cause problems due to misalignment. -@xref{Aligned Data}. - @item Ensure that @file{crt0.o} or @file{crt1.o} on your system guarantees a 64-bit @@ -10593,6 +10584,13 @@ Progress is being made on making this work @code{gcc}, and some of the relevant operating systems (such as GNU/Linux). +@cindex alignment testing +@cindex testing alignment +A package that tests the degree to which a Fortran compiler +(such as @code{g77}) +aligns 64-bit floating-point variables and arrays +is available at @uref{ftp://alpha.gnu.org/gnu/g77/align/}. + @node Prefer Automatic Uninitialized Variables @subsection Prefer Automatic Uninitialized Variables diff --git a/gcc/f/news.texi b/gcc/f/news.texi index a5c1e78..8bfa438 100644 --- a/gcc/f/news.texi +++ b/gcc/f/news.texi @@ -9,7 +9,7 @@ @c in the standalone derivations of this file (e.g. NEWS). @set copyrights-news 1995-1999 -@set last-update-news 1999-03-17 +@set last-update-news 1999-04-02 @include root.texi @@ -204,6 +204,14 @@ when the corresponding @emph{subsequent} function program unit disagrees with the reference concerning the type of the function. @end ifclear +@cindex alignment +@cindex double-precision performance +@cindex -malign-double +@item +The @code{-malign-double} option +now reliably aligns @emph{all} double-precision variables and arrays +on Intel x86 targets. + @ifclear USERVISONLY @item Improve documentation and indexing, |