diff options
| author | Marcin Juszkiewicz <hrw@openembedded.org> | 2009-05-16 09:40:26 +0200 |
|---|---|---|
| committer | Marcin Juszkiewicz <hrw@openembedded.org> | 2009-06-02 11:55:17 +0200 |
| commit | 7cc9f9690818e8ad8eb8ebe847d431bb94c00640 (patch) | |
| tree | 9a43f555c6ccd3aeff5f18add0c96f969d728177 /recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch | |
| parent | 5a671e99009f5b9b4b8aa5a83a2a503eb449d4b8 (diff) | |
gcc 4.3.3: add ep93xx patches from Martin W. Guy
Patchset taken from http://martinwguy.co.uk/martin/crunch/
Text from page:
On 10 March there were no known bugs in this stuff (again). On 19 March
libvorbisenc managed to find a bug in GCC whereby it incorrectly
optimizes certain code sequences that use single-precision floats. The
Maverick code generator exhibits similar symptoms for the same code, but
only at optimization levels -O2 and above, so the fastest reliable
optimization options for Maverick at present are -O -ffast-math.
I've been working on GCC-4.3.3 to make it generate working code for the
Cirrus Logic MaverickCrunch FPU, as found in their ARM-based EP9302,
EP9307, EP9312 and EP9315 chips, making floating point-intensive code
about 2.5 times faster.
This follows on from Hasjim Williams' earlier work with gcc-4.1.2 and
4.2.0, a bundle of his more recent ideas and more hacks from me.
If you want to understand the patches themselves, there is an article
about the MaverickCrunch FPU and GCC's problems with it on the Debian
wiki [1] and I have added commentary at the top of the individual patch
files.
1. http://wiki.debian.org/ArmEabiMaverickCrunch
Signed-off-by: Marcin Juszkiewicz <marcin@juszkiewicz.com.pl>
Acked-by: Koen Kooi <koen@openembedded.org>
Acked-by: Tom Rini <trini@embeddedalley.com>
Diffstat (limited to 'recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch')
| -rw-r--r-- | recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch b/recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch new file mode 100644 index 0000000000..bdc603ac91 --- /dev/null +++ b/recipes/gcc/gcc-4.3.3/ep93xx/arm-crunch-cftruncd32-attr.patch @@ -0,0 +1,12 @@ +--- gcc-4.3.2/gcc/config/arm/cirrus.md.old 2009-02-16 16:19:19.000000000 +0000 ++++ gcc-4.3.2/gcc/config/arm/cirrus.md 2009-03-10 12:13:10.000000000 +0000 +@@ -425,7 +425,8 @@ + "TARGET_32BIT && TARGET_HARD_FLOAT && TARGET_MAVERICK" + "cftruncd32%?\\t%Y2, %V1\;cfmvr64l%?\\t%0, %Z2" + [(set_attr "type" "f_cvt") +- (set_attr "length" "8")] ++ (set_attr "length" "8") ++ (set_attr "cirrus" "normal")] + ) + + ; Cirrus hardware bugs: denormalized values on input are truncated to zero |