About GSOC.

[Joseph Myers]

On Fri, 16 Nov 2018, Tejas Joshi wrote:

> About roundeven, there might be need to add case to
> expand_builtin_int_roundingfn similar to
> ceil, for expansion.
> But how is round() expanded since there's no
> entry for it in expand_builtin_int_roundingfn ?

Please see the comment above expand_builtin_int_roundingfn, and that above 
expand_builtin_int_roundingfn_2, which handle different sets of functions.  
Those functions are of no relevance to adding support for built-in 
roundeven.  (They might be of relevance to support for built-in fromfp 
functions, depending on whether the detailed semantics allows 
casts-to-integer of calls to other functions to be converted into calls to 
the fromfp functions.  But I don't think inventing __builtin_lroundeven 
would be appropriate.)

> Also, is it right to have an added case for roundeven in convert.c
> along CASE_FLT_FN (BUILT_IN_ROUND)
> in convert_to_integer_1?

Not until doing things with fromfp functions.  There is no lroundeven (for 
example) in TS 18661-1.

-- 
Joseph S. Myers
joseph@codesourcery.com