[PATCH v2 3/5] Partially revert 681900d29683722b1cb0a8e565a0585846ec5a61

[Florian Weimer]

* Siddhesh Poyarekar:

> Do not attempt to fix the significand top bit in long double input
> received in printf.  The code should never reach here because isnan
> should now detect unnormals as NaN.  This is already a NOP for glibc
> since it uses the gcc __builtin_isnan, which detects unnormals as NaN.

This looks okay to me, thanks.

Florian
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