[PATCH] make minmax detection work with FMIN/FMAX IFNs

[Joseph Myers]

On Fri, 8 May 2020, Richard Biener wrote:

> The IFNs are supposed to match fmin and fmax from the C standard which 
> IIRC have IEEE semantics.

fmin and fmax have IEEE (2008) semantics (where an sNaN operand results in 
a qNaN result with "invalid" raised", but a quiet NaN results in the other 
operand, if not sNaN, being returned).  Not to be confused with any of the 
new minimum/maximum operations in IEEE (2019) (both variants that treat 
all NaNs like other arithmetic operations, and variants that can raise 
"invalid" for sNaN without returning a NaN), for which C bindings under 
different names are proposed.

-- 
Joseph S. Myers
joseph@codesourcery.com