Add test for setjmp / longjmp and floating-point state

[Andreas Jaeger]

On 05/14/2013 07:09 PM, Joseph S. Myers wrote:
> A while back I noticed that the ARM and MIPS implementations of setjmp
> / longjmp wrongly saved and restored floating-point exceptions and
> rounding modes, contrary to ISO C (bugs 14908 and 14909).  This patch
> adds an architecture-independent test to detect this bug.  Tested
> x86_64 and x86 that the new test passes, and on ARM that it properly
> detects the bug and fails there.

Thanks, this is ok,

Andreas
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