Fix remainder exceptions and directed-rounding results (bugs 15480, 15485)

[Andreas Jaeger]

On 05/17/2013 06:54 PM, Joseph S. Myers wrote:
> The dbl-64 implementation of the remainder function assumes
> round-to-nearest (the results of this function should not depend on
> the rounding mode at all) and can generate spurious "inexact"
> exceptions.  This patch fixes both problems by using
> SET_RESTORE_ROUND_NOEX (FE_TONEAREST) in the appropriate case of this
> function (other parts of the function do not do anything depending on
> rounding mode or generating spurious exceptions, and may be required
> to generate correct "invalid" exceptions in certain cases).

ok, thanks,

Andreas
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