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[Bug libc/5268] huge and denornal reads and writes for long doubles


http://sourceware.org/bugzilla/show_bug.cgi?id=5268

--- Comment #4 from Alan Modra <amodra at gmail dot com> ---
Created attachment 7095
  --> http://sourceware.org/bugzilla/attachment.cgi?id=7095&action=edit
ldbl2mpn.c rewrite

This rewrite of __mpn_extract_long_double uses extra precision for the
normalization after subtraction, avoiding the loss of 1 bit.

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