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Re: [PATCH] Builtin function roundeven folding implementation
On Fri, Aug 23 2019, Tejas Joshi wrote:
> This is a full patch for the roundeven variants along with
> documentation and additional testcases. The following code also
> conforms to GNU's coding standards.
> 2019-08-22 Tejas Joshi <firstname.lastname@example.org>
> Martin Jambor <email@example.com>
> * builtins.c (mathfn_built_in_2): Added CASE_MATHFN for ROUNDEVEN.
> * builtins.def: Added function definitions for roundeven function
> * fold-const-call.c (fold_const_call_ss): Added case for roundeven
> function call.
> * fold-const.c (negate_mathfn_p): Added case for roundeven function.
> (tree_call_nonnegative_warnv_p): Added case for roundeven function.
> (integer_valued_real_call_p): Added case for roundeven function.
> * real.c (is_even): New function. Returns true if real number is even,
> otherwise returns false.
> (is_halfway_below): New function. Returns true if real number is
> halfway between two integers, else return false.
> (real_roundeven): New function. Round real number to nearest integer,
> rounding halfway cases towards even.
> * real.h (real_value): Added descriptive comments. Added function
> declaration for roundeven function.
> * doc/extend.texi (Other Builtins): List roundeven variants among
> functions which can be handled as builtins.
> 2019-08-21 Tejas Joshi <firstname.lastname@example.org>
> * gcc.dg/torture/builtin-round-roundeven.c: New test.
> * gcc.dg/torture/builtin-round-roundevenf128.c: New test.
For the record, I bootstrapped and tested the patch on an x86_64-linux
and it passes both fine.
Joseph, please have a look and hopefully this is the version that I can