--- Comment #12 from zimmerma+gcc at loria dot fr 2010-09-07 11:47 ---
*** Bug 45559 has been marked as a duplicate of this bug. ***
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zimmerma+gcc at loria dot fr changed:
What|Removed |Added
--- Comment #9 from jakub at gcc dot gnu dot org 2010-07-24 08:07 ---
Well, the soft-fp code is also in glibc and gcc, so it will likely need fixing
there as well. Do you have a reference to lkml post?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44631
--- Comment #10 from mikpe at it dot uu dot se 2010-07-24 08:45 ---
The lkml post is:
http://marc.info/?l=linux-kernelm=127957675305013w=2
I did look briefly at glibc's soft-fp, but (a) it was substantially updated in
February 2006, and (b) none of my systems seemed to enable it (i.e.,
--- Comment #11 from jakub at gcc dot gnu dot org 2010-07-24 19:59 ---
In gcc, soft-fp is used e.g. for x86_64 __float128 support.
In glibc, soft-fp is used on several architectures for long double support,
e.g. sparc* or alpha.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44631
--- Comment #7 from mikpe at it dot uu dot se 2010-07-23 16:44 ---
The Linux kernel math-emu fix is included in kernel 2.6.35-rc6. I've
re-checked that the test cases work correctly on USIIIi with -mcpu=v9 and this
kernel.
The fix is scheduled for backporting to the official stable
--- Comment #8 from rguenth at gcc dot gnu dot org 2010-07-23 17:24 ---
Thus, invalid.
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rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #6 from mikpe at it dot uu dot se 2010-07-18 20:58 ---
Created an attachment (id=21244)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21244action=view)
fix Linux kernel math emulation FP_FROM_INT macro
The bug is in the Linux kernel math-emu code. The _FP_FROM_INT
--- Comment #5 from mikpe at it dot uu dot se 2010-07-15 21:30 ---
Created an attachment (id=21219)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21219action=view)
updated long long to double conversion test
I've updated the test case to try conversions of a larger range of
--- Comment #4 from mikpe at it dot uu dot se 2010-06-23 12:12 ---
Created an attachment (id=20986)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20986action=view)
test long long to double runtime conversions
Making the constant signed rather than unsigned makes no difference.
I
--- Comment #1 from rguenth at gcc dot gnu dot org 2010-06-22 13:39 ---
Please make sure this is not a glibc bug. Does it work with -O1, with -O1
-ffast-math?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44631
--- Comment #2 from doko at ubuntu dot com 2010-06-22 13:53 ---
yes, gcc -mcpu=v9 and gcc -m64 work both with -O1 and -O1 -ffast-math.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44631
--- Comment #3 from jakub at gcc dot gnu dot org 2010-06-22 17:13 ---
Well, for -O1 the ullong - double conversion is done at compile time instead
of runtime.
Does the problem occur also when l is long long instead of unsigned long long?
Can you check what value the fxtod insn computes?
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