From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 0B3223858C52; Mon, 27 Feb 2023 19:32:34 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0B3223858C52 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1677526355; bh=1pri+GXAwztEMkv3jCb0MCMg/Up3lKWauqIMuSZzIa0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=oBEUBLPDt/vNyVBoyBhb1IWO37OKTaIc7roUNhNFDGTDf62kTbyoh4khj2WkCt6p1 5zRyR1Siq/XPa1/0SpgbOnuAwoUqksYHlgWEhza1Cc9d3WUZGzznxBkWQofnnD4Wte 2o0d/hkXKJXQgE7YTpHpueFdSsoxfxzjax+QoHoM= From: "anlauf at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libfortran/108937] Intrinsic IBITS(I,POS,LEN) fails when LEN equals to BIT_SIZE(I). Date: Mon, 27 Feb 2023 19:32:34 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libfortran X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: anlauf at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108937 anlauf at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |anlauf at gcc dot gnu.org --- Comment #5 from anlauf at gcc dot gnu.org --- Interestingly, we simplify IBITS(-1,0,32) to -1, and also the code generated for ibits(x, p, lbits) produces the result expected by the reporter, and which is also generated by Intel and NAG. For ISHFT we have /* ISHFT (I, SHIFT) =3D (abs (shift) >=3D BIT_SIZE (i)) ? 0 : ((shift >=3D 0) ? i << shift : i >> -shift) where all shifts are logical shifts. */ so we might as well consider doing what the reporter suggests.=