From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <libc-alpha-return-93264-listarch-libc-alpha=sources.redhat.com@sourceware.org>
Received: (qmail 89221 invoked by alias); 14 Jun 2018 16:56:07 -0000
Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <libc-alpha.sourceware.org>
List-Subscribe: <mailto:libc-alpha-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/libc-alpha/>
List-Post: <mailto:libc-alpha@sourceware.org>
List-Help: <mailto:libc-alpha-help@sourceware.org>, <http://sourceware.org/ml/#faqs>
Sender: libc-alpha-owner@sourceware.org
Received: (qmail 89209 invoked by uid 89); 14 Jun 2018 16:56:06 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.1 required=5.0 tests=AWL,BAYES_00,SPF_PASS autolearn=ham version=3.3.2 spammy=Hx-languages-length:608
X-HELO: zimbra.cs.ucla.edu
Subject: Re: [PATCH v2 1/2] Y2038: Add 64-bit time for all architectures
To: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr>,
 libc-alpha@sourceware.org
References: <20180614135116.8767-1-albert.aribaud@3adev.fr>
 <20180614135116.8767-2-albert.aribaud@3adev.fr>
From: Paul Eggert <eggert@cs.ucla.edu>
Openpgp: preference=signencrypt
Message-ID: <d142f4d9-5e65-ed43-1b6c-2dc5c1d9d157@cs.ucla.edu>
Date: Thu, 14 Jun 2018 16:56:00 -0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.8.0
MIME-Version: 1.0
In-Reply-To: <20180614135116.8767-2-albert.aribaud@3adev.fr>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-SW-Source: 2018-06/txt/msg00418.txt.bz2

On 06/14/2018 06:51 AM, Albert ARIBAUD (3ADEV) wrote:
> +/* check whether a time64_t value fits in a time_t */
> +# if __TIMESIZE == 64
> +/* __time64_t is time_t, so it always fits_in_time_t */
> +#  define fits_in_time_t(x)	1
> +# else
> +/* Not all __time64_t values can fit; check by type-casting */
> +static inline bool
> +fits_in_time_t (__time64_t t)
> +{
> +  return t == (time_t) t;
> +}
> +# endif

Don't bother with the "#if". Just have the static function 
unconditionally. It should generate zero instructions if time_t is 64 bits.