--- Comment #11 from hjl dot tools at gmail dot com 2009-12-30 15:50
---
A patch is posted at
http://gcc.gnu.org/ml/gcc-patches/2009-12/msg01208.html
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hjl dot tools at gmail dot com changed:
What|Removed |Added
--- Comment #7 from hjl dot tools at gmail dot com 2009-12-29 21:40 ---
Here is a testcase in C:
[...@gnu-6 tmp]$ cat y.c
unsigned int foo[] __attribute__ ((aligned(16))) =
{
0x8000, 1, 0xa000, 2,
3, 0xd000, 0xf000, 0xe000
};
unsigned int bar[] __attribute__
--- Comment #8 from hjl dot tools at gmail dot com 2009-12-29 23:50 ---
Created an attachment (id=19420)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19420action=view)
A patch
I don't see how we can easily check unsigned underflow in vector
integer subtraction. This patch simply
--- Comment #9 from hjl dot tools at gmail dot com 2009-12-30 04:47 ---
Hi Richard, the code in question is added by
http://gcc.gnu.org/ml/gcc-patches/2005-06/msg02185.html
I don't quite understand how it can properly handle unsigned V4SI
underflow in V4SI vector subtraction.
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--- Comment #10 from hjl dot tools at gmail dot com 2009-12-30 04:49
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Created an attachment (id=19422)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19422action=view)
An updated patch
I am testing this patch now.
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hjl dot tools at gmail dot com changed:
What
