From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0B7CC83038 for ; Tue, 1 Jul 2025 20:51:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IEWrHOEUJ0Z++TXQSWQsTe6OPGL3CRK2tFLJOFHdLRw=; b=E/ejdnZvZtjdi+ CM5fKbGeqfNbuM39+DV40p+YHO36oBC8Kee1+S6buQEfHDdIF/m23kxTHFGOAfcrERRCVoR75GWt4 v1txMqXON8wFpmwK81Fs9nfkKf9mTJTQdycBZZTHC3XcUuNCkxeNe8q4KBKvBWa18Xl1AyebQjy/6 oP+Fv0vKOYygQIKeDkdNcmCNNqHBmVu8iYfHCZAKszsiK4oKCkOHTBkYMpsS3WqyiSaZJfNDKxuD1 Yt6ES4S5vy2Zy73MxakA2PtmSc6KvEGVhQtTbteVmY0U0cSXyfVJ8ONpo3lbzD57GtLVPKE2CVCz4 u4AqnKfyOd/i1sd8u+Hw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uWhwV-00000006cA3-0nhs; Tue, 01 Jul 2025 20:51:03 +0000 Received: from mail-pf1-x431.google.com ([2607:f8b0:4864:20::431]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uWfmF-00000006LQG-0oyB for linux-riscv@lists.infradead.org; Tue, 01 Jul 2025 18:32:20 +0000 Received: by mail-pf1-x431.google.com with SMTP id d2e1a72fcca58-7424ccbef4eso3339237b3a.2 for ; Tue, 01 Jul 2025 11:32:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1751394738; x=1751999538; darn=lists.infradead.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=gY6mQVMmIl68dFLJH/SnrEytnvbgKUD06sOpURKt7zw=; b=ITBi94UsB8HLzGZ97VCPZWDkMAkBf5Ipiv+4xuPlLD+pALILqMCTswz9sY48Cjxe91 dxnOYrDDwdZghVWEoN11zOS7rDBdP+sP7Uu+GnyLVrkxBdYlwUGq6f0n5BCoVLeZ85TJ m7jPMxA34WAbEdhbb1hzI+e0N5Bd+IU+2BkhwCJsLatAduC06277SZhfBDjDmIzl42ls Gq0mOFJHnHGrCT6LPjHI6JDA76e0z7se7kFLyOJEHHA++0zrodhzIRD7G9/kRypzx4HA 1slM+yMUNojnKxSI0gubhu4WsueDqiuVGV4c1reryyFQ4xcwGgg2ubQvod4dc6pqutsh qQWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751394738; x=1751999538; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=gY6mQVMmIl68dFLJH/SnrEytnvbgKUD06sOpURKt7zw=; b=SqRQk2/U+Gdn7CPU6nQj4btkrjEq9LoNAo4v11o3sCiToSe5U1TsJWwCfLM4rFSdpv iH9r/5oNtAwiXUC9pusZc+HBif67T5B81T7nq9Pl65KxhqcPy9OIZ4U7wkrkfunDZwXM +4ZySYmmJtWUFbj3gELK/yqbVpWy1zRlf/7guair6OWCK/FhmYAVDEFeKvlO5FRoxfQG yBgLZKDYwjnuyzZVOZEkodw0KXOBxfdx2JIbZQeI7M8x2ci+6MOYzogiJtF82T2Tb48C y7Na2YntPB8q2vLHr3/yKG0S3YsNP1cUQBqFrpmLS/l7IixAC2UW68ujR3TtJl/Mj2FW CkXA== X-Forwarded-Encrypted: i=1; AJvYcCVuYHeYX4VtZ3sQ7zAcmoAyyS6mbD7S5p6rZl39vksF0N0Njkdcl4pXJV43oRqjfyYpJ8Xg8MnmMfvzLw==@lists.infradead.org X-Gm-Message-State: AOJu0Yx0Rpg7Dxm8aIvKPv2iWiCoRJdsbTiANkYyy8CdtuXikre92VGs akmCVVdafOHggEUe0DOTmny4+v6g+JeTCZMAXDEgGJHlaj6pl2S3aora X-Gm-Gg: ASbGnctnbps18wK3twva/tgzm6IqXdxIrCCUjFRtB3fu5FlKoNH5jEiQxEsSLjYO15D m66z7Xhm//Y12jJHkoo+DUd1N5WpLOrxlb5vI27dLpfkoCbwuhGq4EUAIB11wH9dEHa80UN5nmg wuGsE9UROCo20w0dIw7GpzSnPtiVrGEsSkrhMF3SaG3kdKEqq8Y+7TJg+Dx2TBck3UCKead8muA mg3ZcIAhfKqx4bbmgPKbyG6+XaZOu4krkwscnWTnb8CYgn6TpibYHyxLPLwMBO7nBYNuoQzQtP0 Y7oCTKUQya0yhHLqQ1tOYLYMHqgz0VJsirH1BFqBdp3KHBUTNHl8ffk5I1QCSg== X-Google-Smtp-Source: AGHT+IFHLL7P1lYF9UPZci0RSTG7Y6C/qYNbKwFfO//TmNisiNGsH7HgHOhmAuCFzDwIfvPTkGQc5Q== X-Received: by 2002:a05:6a00:2e15:b0:732:2923:b70f with SMTP id d2e1a72fcca58-74af6f73b0emr24350576b3a.11.1751394737753; Tue, 01 Jul 2025 11:32:17 -0700 (PDT) Received: from localhost ([216.228.127.130]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74af55c6d49sm12327550b3a.119.2025.07.01.11.32.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Jul 2025 11:32:16 -0700 (PDT) Date: Tue, 1 Jul 2025 14:32:14 -0400 From: Yury Norov To: cp0613@linux.alibaba.com Cc: alex@ghiti.fr, aou@eecs.berkeley.edu, arnd@arndb.de, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux@rasmusvillemoes.dk, palmer@dabbelt.com, paul.walmsley@sifive.com Subject: Re: [PATCH 2/2] bitops: rotate: Add riscv implementation using Zbb extension Message-ID: References: <20250701124737.687-1-cp0613@linux.alibaba.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250701124737.687-1-cp0613@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250701_113219_261668_D1778C3C X-CRM114-Status: GOOD ( 33.33 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gVHVlLCBKdWwgMDEsIDIwMjUgYXQgMDg6NDc6MDFQTSArMDgwMCwgY3AwNjEzQGxpbnV4LmFs aWJhYmEuY29tIHdyb3RlOgo+IE9uIE1vbiwgMzAgSnVuIDIwMjUgMTI6NTM6MDMgLTA0MDAsIHl1 cnkubm9yb3ZAZ21haWwuY29tIHdyb3RlOgo+IAo+ID4gPiA+IDEuIFRoZSBtb3N0IHRyaXZpYWwg Y29tcGlsZS1jYXNlIGlzIGFjdHVhbGx5IGV2YWx1YXRlZCBhdCBjb21waWxlIHRpbWU7IGFuZAo+ ID4gPiA+IDIuIEFueSBhcmNoLXNwZWNpZmljIGNvZGUgaXMgd2VsbCBleHBsYWluZWQ7IGFuZAo+ ID4gPiA+IDMuIGxlZ2FjeSBjYXNlIG9wdGltaXplZCBqdXN0IGFzIHdlbGwgYXMgbm9uLWxlZ2Fj eS4KPiA+ID4gCj4gPiA+IDEuIEFzIGluIHRoZSBhYm92ZSByZXBseSwgdXNlIHRoZSBnZW5lcmlj IGltcGxlbWVudGF0aW9uIHdoZW4gY29tcGlsZS10aW1lIGV2YWx1YXRpb24KPiA+ID4gICAgaXMg cG9zc2libGXjgIIKPiA+ID4gMi4gSSB3aWxsIGltcHJvdmUgdGhlIGNvbW1lbnRzIGxhdGVyLgo+ ID4gCj4gPiBJJ20gcGFydGljdWxhcmx5IGludGVyZXN0ZWQgaW4gcm9yOC9yb2w4IGNhc2U6Cj4g PiAKPiA+ICAgICAgICAgdTMyIHdvcmQzMiA9ICgodTMyKXdvcmQgPDwgMjQpIHwgKCh1MzIpd29y ZCA8PCAxNikgfCAoKHUzMil3b3JkIDw8IDgpIHwgd29yZDsKPiA+IAo+ID4gV2hlbiB5b3UgZXhw YW5kIGl0IHRvIDMyLWJpdCB3b3JkLCBhbmQgd2FudCB0byByb3RhdGUsIHlvdSBvYnZpb3VzbHkK PiA+IG5lZWQgdG8gY29weSBsb3dlciBxdWFydGVyd29yZCB0byB0aGUgaGlnaGVyIG9uZToKPiA+ IAo+ID4gICAgICAgICAweGFiID4+IDB4YWIwMDAwYWIKPiA+IAo+ID4gVGhhdCB3YXkgZ2VuZXJp YyAodTgpcm9yMzIoMHhhYiwgc2hpZnQpIHdvdWxkIHdvcmsuIEJ1dCBJIGRvbid0IHVuZGVyc3Rh bmQKPiA+IHdoeSB5b3UgY29weSB0aGUgbG93ZXIgOCBiaXRzIHRvIGlubmVyIHF1YXJ0ZXJ3b3Jk cy4gSXMgdGhhdCBhIGhhcmR3YXJlCj4gPiByZXF1aXJlbWVudD8gQ2FuIHlvdSBwb2ludCB0byBh bnkgYXJjaCBkb2N1bWVudGF0aW9uIAo+ID4gCj4gPiA+IDMuIEFzIG1lbnRpb25lZCBiZWZvcmUs IG9ubHkgOC1iaXQgcm90YXRpb24gc2hvdWxkIGhhdmUgbm8gb3B0aW1pemF0aW9uIGVmZmVjdCwg YW5kCj4gPiA+ICAgIDE2LWJpdCBhbmQgYWJvdmUgd2lsbCBoYXZlIHNpZ25pZmljYW50IG9wdGlt aXphdGlvbi4KPiA+IAo+ID4gSSBhc2tlZCB5b3UgYWJvdXQgdGhlIGFzbSBnb3RvICgibGVnYWN5 IikgdGhpbmc6IHlvdSBjYWxjdWxhdGUgdGhhdAo+ID4gY29tcGxleCB3b3JkMzIgX2JlZm9yZV8g ZXZhbHVhdGluZyB0aGUgZ290by4gU28gdGhpcyB3b3JkMzIgbWF5IGdldAo+ID4gdW51c2VkLCBh bmQgeW91IHdhc3RlIGN5Y2xlcy4gSSB3YW50IHRvIG1ha2Ugc3VyZSB0aGlzIGlzbid0IHRoZSBj YXNlLgo+IAo+IFRoYW5rIHlvdSBmb3IgeW91ciBzdWdnZXN0aW9uIGFuZCByZW1pbmRlci4gVGhp cyBpcyBub3QgYSBoYXJkd2FyZSByZXF1aXJlbWVudCwgYnV0IGl0CgpTdXJlLiBQbGVhc2UgYWRk CgpTdWdnZXN0ZWQtYnk6IFl1cnkgTm9yb3YgKE5WSURJQSkgPHl1cnkubm9yb3ZAZ21haWwuY29t PgoKPiBpcyBzb21ld2hhdCByZWxhdGVkIGJlY2F1c2UgdGhlIHpiYiBpbnN0cnVjdGlvbiBvbmx5 IHN1cHBvcnRzIHdvcmQtc2l6ZWQgcm90YXRlIFsxXS4KPiBDb25zaWRlcmluZyB0aGUgY2FzZSB3 aGVyZSB0aGUgc2hpZnQgaXMgZ3JlYXRlciB0aGFuIDgsIGlmIHRoZSBtb2R1bHVzIG9mIHRoZSBz aGlmdCBpcwo+IG5vdCB0YWtlbiwgaXQgaXMgcmVxdWlyZWQgdG8gY29udGludW91c2x5IGNvbmNh dGVuYXRlIDgtYml0IGRhdGEgaW50byAzMiBiaXRzLgo+IAo+IFNvLCBJIGNvbnNpZGVyZWQgdGhl IGNhc2Ugb2YgdGFraW5nIHRoZSByZW1haW5kZXIgb2Ygc2hpZnQgYW5kIGZvdW5kIHRoYXQgdGhp cwo+IGltcGxlbWVudGF0aW9uIHdvdWxkIGhhdmUgb25lIGxlc3MgaW5zdHJ1Y3Rpb24sIHNvIHRo ZSBmaW5hbCBpbXBsZW1lbnRhdGlvbiBpcyBhcyBmb2xsb3dzOgo+IGBgYAo+IHN0YXRpYyBpbmxp bmUgdTggdmFyaWFibGVfcm9sOCh1OCB3b3JkLCB1bnNpZ25lZCBpbnQgc2hpZnQpCgpOb3cgdGhh dCBpdCBoYXMgYXNzZW1ibGVyIGlubGluZXMsIHdvdWxkIGl0IGhlbHAgdG8gYWRkIHRoZSBfX3B1 cmUKcXVhbGlmaWVyPwoKPiB7Cj4gCXUzMiB3b3JkMzI7Cj4gCj4gCWFzbSBnb3RvKEFMVEVSTkFU SVZFKCJqICVsW2xlZ2FjeV0iLCAibm9wIiwgMCwKPiAJCQkJICAgICAgUklTQ1ZfSVNBX0VYVF9a QkIsIDEpCj4gCQkJICA6IDogOiA6IGxlZ2FjeSk7Cj4gCj4gCXdvcmQzMiA9ICgodTMyKXdvcmQg PDwgMjQpIHwgd29yZDsKPiAJc2hpZnQgPSBzaGlmdCAlIDg7CgogICAgICAgIHNoaWZ0ICU9IDg7 Cgo+IAo+IAlhc20gdm9sYXRpbGUoCj4gCQkiLm9wdGlvbiBwdXNoXG4iCj4gCQkiLm9wdGlvbiBh cmNoLCt6YmJcbiIKPiAJCSJyb2x3ICUwLCAlMSwgJTJcbiIKPiAJCSIub3B0aW9uIHBvcFxuIgo+ IAkJOiAiPXIiICh3b3JkMzIpIDogInIiICh3b3JkMzIpLCAiciIgKHNoaWZ0KSA6KTsKPiAKPiAJ cmV0dXJuICh1OCl3b3JkMzI7Cj4gCj4gbGVnYWN5Ogo+IAlyZXR1cm4gZ2VuZXJpY19yb2w4KHdv cmQsIHNoaWZ0KTsKPiB9Cj4gCj4gc3RhdGljIGlubGluZSB1OCB2YXJpYWJsZV9yb3I4KHU4IHdv cmQsIHVuc2lnbmVkIGludCBzaGlmdCkKPiB7Cj4gCXUzMiB3b3JkMzI7Cj4gCj4gCWFzbSBnb3Rv KEFMVEVSTkFUSVZFKCJqICVsW2xlZ2FjeV0iLCAibm9wIiwgMCwKPiAJCQkJICAgICAgUklTQ1Zf SVNBX0VYVF9aQkIsIDEpCj4gCQkJICA6IDogOiA6IGxlZ2FjeSk7Cj4gCj4gCXdvcmQzMiA9ICgo dTMyKXdvcmQgPDwgOCkgfCB3b3JkOwo+IAlzaGlmdCA9IHNoaWZ0ICUgODsKPiAKPiAJYXNtIHZv bGF0aWxlKAo+IAkJIi5vcHRpb24gcHVzaFxuIgo+IAkJIi5vcHRpb24gYXJjaCwremJiXG4iCj4g CQkicm9ydyAlMCwgJTEsICUyXG4iCj4gCQkiLm9wdGlvbiBwb3BcbiIKPiAJCTogIj1yIiAod29y ZDMyKSA6ICJyIiAod29yZDMyKSwgInIiIChzaGlmdCkgOik7Cj4gCj4gCXJldHVybiAodTgpd29y ZDMyOwo+IAo+IGxlZ2FjeToKPiAJcmV0dXJuIGdlbmVyaWNfcm9yOCh3b3JkLCBzaGlmdCk7Cj4g fQo+IGBgYAoKT0ssIHRoaXMgbG9va3MgYmV0dGVyLgoKPiBJIGNvbXBhcmVkIHRoZSBwZXJmb3Jt YW5jZSBvZiByb3I4ICh6YmIgb3B0aW1pemVkKSBhbmQgZ2VuZXJpY19yb3I4IG9uIHRoZSBYVUFO VElFIEM5MDgKPiBieSBsb29waW5nIHRoZW0uIHJvcjggaXMgYmV0dGVyLCBhbmQgdGhlIGFkdmFu dGFnZSBvZiByb3I4IGJlY29tZXMgbW9yZSBvYnZpb3VzIGFzIHRoZQo+IG51bWJlciBvZiBpdGVy YXRpb25zIGluY3JlYXNlcy4gVGhlIHRlc3QgY29kZSBpcyBhcyBmb2xsb3dzOgo+IGBgYAo+IAl1 OCB3b3JkID0gMHg1YTsKPiAJdTMyIHNoaWZ0ID0gOTsKPiAJdTMyIGksIGxvb3AgPSAxMDA7Cj4g CXU4IHJldDEsIHJldDI7Cj4gCj4gCXU2NCB0MSA9IGt0aW1lX2dldF9ucygpOwo+IAlmb3IgKGkg PSAwOyBpIDwgbG9vcDsgaSsrKSB7Cj4gCQlyZXQyID0gZ2VuZXJpY19yb3I4KHdvcmQsIHNoaWZ0 KTsKPiAJfQo+IAl1NjQgdDIgPSBrdGltZV9nZXRfbnMoKTsKPiAJZm9yIChpID0gMDsgaSA8IGxv b3A7IGkrKykgewo+IAkJcmV0MSA9IHJvcjgod29yZCwgc2hpZnQpOwo+IAl9Cj4gCXU2NCB0MyA9 IGt0aW1lX2dldF9ucygpOwo+IAo+IAlwcl9pbmZvKCJ0Mi10MT0lbGxkIHQzLXQyPSVsbGRcbiIs IHQyIC0gdDEsIHQzIC0gdDIpOwo+IGBgYAoKUGxlYXNlIGRvIHRoZSBmb2xsb3dpbmc6CgoxLiBE cm9wIHRoZSBnZW5lcmljX3JvcjgoKSBhbmQga2VlcCBvbmx5IHJvci9sOCgpCjIuIEFkZCByb3Iv bDE2LCAzNCBhbmQgNjQgdGVzdHMuCjMuIEFkanVzdCB0aGUgJ2xvb3AnIHNvIHRoYXQgZWFjaCBz dWJ0ZXN0IHdpbGwgdGFrZSAxLTEwIG1zIG9uIHlvdXIgaHcuCjQuIE5hbWUgdGhlIGZ1bmN0aW9u IGxpa2UgdGVzdF9yb3JsKCksIGFuZCBwdXQgaXQgbmV4dCB0byB0aGUgdGVzdF9mbnMoKQogICBp biBsaWIvdGVzdF9iaXRvcHMuYy4gUmVmZXIgdGhlIDBhMmM2NjY0ZTU2ZjAgZm9yIGltcGxlbWVu dGF0aW9uLgo1LiBQcmVwZW5kIHRoZSBzZXJpZXMgd2l0aCB0aGUgYmVuY2htYXJrIHBhdGNoLCBq dXN0IGFzIHdpdGggY29uc3QtZXZhbAogICBvbmUsIGFuZCByZXBvcnQgYmVmb3JlL2FmdGVyIGZv ciB5b3VyIHNlcmllcy4gCgo+ID4gUGxlYXNlIGZpbmQgYXR0YWNoZWQgYSB0ZXN0IGZvciBjb21w aWxlLXRpbWUgcm9yL3JvbCBldmFsdWF0aW9uLgo+ID4gUGxlYXNlIGNvbnNpZGVyIHByZXBlbmRp bmcgeW91ciBzZXJpZXMgd2l0aCBpdC4KPiAKPiBPa2F5LCBJJ2xsIGJyaW5nIGl0IHRvIHRoZSBu ZXh0IHNlcmllcy4KClN0aWxsIHdhaXRpbmcgZm9yIGJsb2F0LW8tbWV0ZXIgcmVzdWx0cy4KClRo YW5rcywKWXVyeQoKPiAKPiBbMV0gaHR0cHM6Ly9naXRodWIuY29tL3Jpc2N2L3Jpc2N2LWJpdG1h bmlwCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51 eC1yaXNjdiBtYWlsaW5nIGxpc3QKbGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRw Oi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==