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Date: Wed, 12 Oct 2022 08:50:49 +0200 Message-Id: <20221012065050.412900-4-aldyh@redhat.com> In-Reply-To: <20221012065050.412900-1-aldyh@redhat.com> References: <20221012065050.412900-1-aldyh@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Aldy Hernandez via Gcc-patches From: Aldy Hernandez Reply-To: Aldy Hernandez Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746463675448002685?= X-GMAIL-MSGID: =?utf-8?q?1746463675448002685?= In writing some range-op entries I noticed we don't have a way to query the sign of the NAN in a range, unless the range only contains NAN, in which case you can just use frange::signbit_p. This patch adds a method that returns TRUE if there exists the possiblity of a NAN and we know its sign. gcc/ChangeLog: * value-range.h (frange::nan_signbit_p): New. --- gcc/value-range.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/gcc/value-range.h b/gcc/value-range.h index cb5e9d0522c..60b989b2b50 100644 --- a/gcc/value-range.h +++ b/gcc/value-range.h @@ -328,6 +328,7 @@ public: bool maybe_isnan (bool sign) const; bool maybe_isinf () const; bool signbit_p (bool &signbit) const; + bool nan_signbit_p (bool &signbit) const; private: void verify_range (); bool normalize_kind (); @@ -1358,4 +1359,20 @@ frange::signbit_p (bool &signbit) const return false; } +// If range has a NAN with a known sign, set it in SIGNBIT and return +// TRUE. + +inline bool +frange::nan_signbit_p (bool &signbit) const +{ + if (undefined_p ()) + return false; + + if (m_pos_nan == m_neg_nan) + return false; + + signbit = m_neg_nan; + return true; +} + #endif // GCC_VALUE_RANGE_H