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Re: V3 PATCH: numeric_limits<> support, fix PR/3865

Richard Henderson <rth@redhat.com> writes:

| The difference, from my perspective, is that the constant
| that the user uses with __builtin_nan can affect the quiet
| bit, whereas with __builtin_qnan it cannot.

Agreed.  This would follow, in some sense, C99 default (which is to
treat formally only QNaNs).

-- Gaby
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