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 DFF223858C42 for ; Mon, 4 Dec 2023 03:45:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org DFF223858C42 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 DFF223858C42 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=1701661526; cv=none; b=Z9VfC2wSORvSTO6PZW55sndon/CFs7JSyv2Q1fhfKH8GbPAgQpyFD9AkefveCqzxzLEiJF2l92bx5aINlrcCJzn1hyrLycKocf2IVP6JEtXlnu7ylHzoF5EfKIwO9rZEfikgeJs/rsD60GKgE9hkKVLQ5Aj986GYnTJ1HgqmzwU= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1701661526; c=relaxed/simple; bh=I8ManRFL8+mJnaQknloywrv9e2Io1+KlQJEaHM6z7f8=; h=DKIM-Signature:Message-ID:Subject:From:To:Date:MIME-Version; b=cnHI8BSASiDRCz8lxEOSbADxXpDqEIJrNCtQGjfdS0Lc7LakpLakKrjJj5X8IzE6lDb0cROS8vzngj7GjpiMwcgfPKxH1eeC9ojXx7phqVsActgkHWgBa1Cbk2AwsW29XXgTLj1KrCE0ztio2iXF7cFFehmwajFl2NDbEnRoi8c= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xry111.site; s=default; t=1701661524; bh=I8ManRFL8+mJnaQknloywrv9e2Io1+KlQJEaHM6z7f8=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=ESc9QkM5S/WKc8D5y2VmkAPAP3CAS3+sTE7VZDA8Ho/kHrIDiOLgtuJG3j4w1l9GG /td04Pv2pwkbRL3CACBb2Bwep8XrqDPHrQhqMmF/U+XfaoIzmqGY/J7scn2mRzp7zB EuVQ3oaDjAvR25yQvH2XclGVo3Vp/ePMF3zhUwxY= Received: from [IPv6:240e:358:110a:1000:dc73:854d:832e:2] (unknown [IPv6:240e:358:110a:1000:dc73:854d:832e:2]) (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 3D25A66BC8; Sun, 3 Dec 2023 22:45:18 -0500 (EST) Message-ID: <8536a453a42c477656f0ee143aa07f8c98ad6220.camel@xry111.site> Subject: Re: [PATCH] LoongArch: Add support for TLS Descriptors From: Xi Ruoyao To: mengqinggang , libc-alpha@sourceware.org Cc: adhemerval.zanella@linaro.org, xuchenghua@loongson.cn, caiyinyu@loongson.cn, chenglulu@loongson.cn, cailulu@loongson.cn, i.swmail@xen0n.name, maskray@google.com, luweining@loongson.cn, wanglei@loongson.cn, hejinyang@loongson.cn Date: Mon, 04 Dec 2023 11:45:15 +0800 In-Reply-To: References: <20231201095759.1897728-1-mengqinggang@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=-1.5 required=5.0 tests=BAYES_00,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 Mon, 2023-12-04 at 11:28 +0800, Xi Ruoyao wrote: > And generally this seems too expensive.=C2=A0 Would it be better to compi= le > libc-tls.c with -ffixed-{f0,f1,...,f31} so we can avoid saving and > restoring FPR/VRs? Note that -fcall-saved-f${x} is not enough for us because it only saves the FPRs, not VRs. Even if we change it to -fcall-saved-xr${x} it won't work. -ffixed-{f0,f1,...,f31} may cause an ICE if the compiler attempts to use a VR or FPR, but if I read the code correctly libc-tls.c just should not perform any floating-point operation, and we can use -mno-lsx to prevent using vector registers. --=20 Xi Ruoyao School of Aerospace Science and Technology, Xidian University