From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from xry111.site (xry111.site [89.208.246.23]) by sourceware.org (Postfix) with ESMTPS id 8B74B3858C54 for ; Sat, 30 Dec 2023 12:25:36 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 8B74B3858C54 Authentication-Results: sourceware.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=xry111.site ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 8B74B3858C54 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=89.208.246.23 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1703939139; cv=none; b=vI9lvrS4PObaX7HKbciY/oArHnlTq1pbs2VvKrZHnm4qXF0WNUajuBJ+tP7Zkqjd94mam2HLZMU145F4DQswKjA1sSdzDosgLo+QY8FPPO0mEXZ+PjOTHe2lb4q53UCobIYaEVsaCAfI2JJit2KO35fmAUQ20gGqChbvg4VIXUM= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1703939139; c=relaxed/simple; bh=87XiSRc0DZkcwUmN00HDXS9hAoU4yTczsQIjvwP0mno=; h=DKIM-Signature:Message-ID:Subject:From:To:Date:MIME-Version; b=atOaZ+Fmic3rnW+asnwpI8ik+kp/qM/CjSpiN6A/Z5JUkbsxwLnr5vFDo6cyrPiY8dLeXkRF90Udkn26UF8D75D2lq3PTg6zPvzitWmDODpAa8NMBvYWMMmIZhP+Wo7G0IDth5Qv1/cxsJ7w2M8fmlkk6NOAS/7+KfwubxOoIvU= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xry111.site; s=default; t=1703939134; bh=87XiSRc0DZkcwUmN00HDXS9hAoU4yTczsQIjvwP0mno=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=grA7IvfMU7YNdvGSAt6dWUI/HzwvaxHMCCS7O3dree/QyEIj0GarFVhGM2d9p0A0D ubecJUSBlRL9+AsA2qlA+KJsuevRdutxxrthVu6gySRo7gyg3g0j9QVip6LxTmE2gL 4kBe92ZMnZf9dYtcq4876MyYVH6SMEl3HEm5Uc8g= Received: from [192.168.124.20] (unknown [113.200.174.126]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-384) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id 4D6F766C75; Sat, 30 Dec 2023 07:25:32 -0500 (EST) Message-ID: <1536d1abc53f3d07dfe7276705cf59b4e571fd17.camel@xry111.site> Subject: Re: [PATCH v1] LoongArch: testsuite:Add the "-ffast-math" compilation option for the file vect-fmin-3.c. From: Xi Ruoyao To: Richard Sandiford , chenxiaolong Cc: gcc-patches@gcc.gnu.org, i@xen0n.name, xuchenghua@loongson.cn, chenglulu@loongson.cn Date: Sat, 30 Dec 2023 20:25:28 +0800 In-Reply-To: References: <20231229040015.6275-1-chenxiaolong@loongson.cn> Autocrypt: addr=xry111@xry111.site; prefer-encrypt=mutual; keydata=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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.2 MIME-Version: 1.0 X-Spam-Status: No, score=-0.1 required=5.0 tests=BAYES_00,BODY_8BITS,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,LIKELY_SPAM_FROM,SPF_HELO_PASS,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Sat, 2023-12-30 at 12:15 +0000, Richard Sandiford wrote: > This shouldn't be necessary.=C2=A0 The test does: >=20 > =C2=A0 for (int i =3D 0; i < n; i +=3D 2) > =C2=A0=C2=A0=C2=A0 { > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 x0 =3D __builtin_fmin (x0, ptr[i + 0]); > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 x1 =3D __builtin_fmin (x1, ptr[i + 1]); > =C2=A0=C2=A0=C2=A0 } > =C2=A0 res[0] =3D x0; > =C2=A0 res[1] =3D x1; >=20 > __builtin_fmin is an FP minimum operation that corresponds directly to > the fmin*3 optab (or reduc_fmin_scal_* for reductions).=C2=A0 It is natur= ally > associative, so doesn't need -ffast-math for that. >=20 > Does LoongArch provide reduc_min_scal_* but not reduc_fmin_scal_*? > If so, we probably need a new target selector for fmin/fmax reduction. Let me try if the [x]vf{min,max} instructions are IEEE-conform. They've still not released the volume 2 of the instruction manual so I can only try... --=20 Xi Ruoyao School of Aerospace Science and Technology, Xidian University