Remove inaccurate x86 cexp implementations (bug 13883)

[Andreas Jaeger]

On 03/21/2012 03:52 PM, Joseph S. Myers wrote:
> This patch fixes bug 13883, cexp inaccurate for large imaginary parts
> on x86, the same way other functions using fsincos and related
> instructions were fixed: remove the x86 versions and use the generic C
> versions instead, which have similar accuracy for small inputs and
> much greater accuracy as the range reduction of the x86 versions gets
> worse.  The testcases added are based on those for sincos.
>
> Tested x86 and x86_64 and ulps updated accordingly.

Thanks, this is ok,

Andreas
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