Add libm-test.inc macro for all-rounding-modes testing

[Ondřej Bílka]

On Tue, Mar 18, 2014 at 12:17:45PM +0000, Joseph S. Myers wrote:
> On Tue, 18 Mar 2014, Ondrej Bilka wrote:
> 
> > Joseph is there some reason why you wait with this patch?
> 
> I don't understand your question.  The patch has been in since the day it 
> was approved; it takes time to do the series of incremental followups, one 
> feature at a time, to move more functions to use ALL_RM_TEST (and in some 
> cases it may well be most appropriate to fix bugs shown up in 
> all-rounding-mode testing before enabling it, if too many XFAILs would be 
> required otherwise; that's why the tests of pow in non-default rounding 
> modes aren't using AUTO_TESTS_ff_f yet, because there are many cases of 
> bug 16315 that need carefully identifying and fixing in many pow 
> implementations, quite possibly adding new testcases in the process, 
> before tests can be enabled without lots of XFAILs).
> 
sorry, I seen it in patchwork at new and when I checked this I did not realized 
that I was on older branch instead of master.