From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from resqmta-a2p-658780.sys.comcast.net (resqmta-a2p-658780.sys.comcast.net [IPv6:2001:558:fd01:2bb4::5]) by sourceware.org (Postfix) with ESMTPS id CAC2E3861871 for ; Mon, 8 Apr 2024 20:20:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CAC2E3861871 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=comcast.net Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=comcast.net ARC-Filter: OpenARC Filter v1.0.0 sourceware.org CAC2E3861871 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2001:558:fd01:2bb4::5 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712607661; cv=none; b=X64hsGSmE3AguV9bo1tQmA4S8eWqPjQcPd4+Y6ne8+thaiep+H2x4QBsgWbDTp+2viuBteeQcPgI/OVhc62RXBpVeXVCHBqYhROenJGYfnFPy+NhCRmODqHkZMDsICh6Pa0McspBBHoiKOGi/4c+x87ksmj1LZg6ftbDjt7jxOs= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712607661; c=relaxed/simple; bh=ZvZhI4nDk/3sbX1IpDLJeCKxGHiwwu2lfCmWi8KBOeo=; h=DKIM-Signature:Mime-Version:Subject:From:Date:Message-Id:To; b=LzgKPfFcPo6SVuvMz2VUBVhLBw8HFQPv3BXlo/D7kfafpbKpmVltkRxZ6fwyxh/U1UaF+AB5HiPtzMYUI9jlT9wkSj1hsgN43NQP362hJpT8KMbieXromyXyhz36gV5HiPdtql3A/Wj4ICPjx15dFZLCkQ+FXS1eSwy1UBsJdrI= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from resomta-a2p-630472.sys.comcast.net ([96.103.145.242]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 256/256 bits) (Client did not present a certificate) by resqmta-a2p-658780.sys.comcast.net with ESMTPS id ttXCrqoc8pKuqtvU9r7zGt; Mon, 08 Apr 2024 20:20:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=20190202a; t=1712607657; bh=Zk4G+upLLYHtiKuG6d8c7jN2oInBV2xl6Ew/wSmRKPk=; h=Received:Received:Content-Type:Mime-Version:Subject:From:Date: Message-Id:To:Xfinity-Spam-Result; b=JIkoCcsiwv9GP1NPsx5pCk3yjI6pegpPte19ZEMpbanF9lrmNbmcmYgdBOt2hbBfH pLoRiooonpq2nqqy8s3PblLzOXiCVfRjKSvtC0yFhHU9GCbNEQ5P/mX8OGDs3bQbt8 i8ovhFKuzfm9OJwTJ0FjsxekzMat4ZKGHAvvDAQeWDkPOo5tw6QAEaBuJuBAGWUkYa i0uKk+FgIJpVslUW1BEcJ6KeHiiuSHJnLSXVtBokoNfafWeG47NygUEplpwVq1VoPh OiG2JMj/dz6JCILVMAK7wP6Pk8TxyOVPDyr4vtsCZVrRFhqvpB77Hgh2skPwjcHb7a nTORUcM96S0vg== Received: from smtpclient.apple ([73.60.223.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 256/256 bits) (Client did not present a certificate) by resomta-a2p-630472.sys.comcast.net with ESMTPSA id tvU7rP6aJHlYLtvU8r2PUY; Mon, 08 Apr 2024 20:20:57 +0000 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.8\)) Subject: Re: [RFC] Linux system call builtins From: Paul Koning In-Reply-To: <20240408200138.kbl6n5te2joj3csn@ws2202.lin.mbt.kalray.eu> Date: Mon, 8 Apr 2024 16:20:55 -0400 Cc: Andrew Pinski , Matheus Afonso Martins Moreira , gcc@gcc.gnu.org Content-Transfer-Encoding: quoted-printable Message-Id: <685FF2F1-0585-4383-874D-3AE4D1726E7B@comcast.net> References: <2d2f1e405361d2b36dd513e3fabd1fe0@gmail.com> <20240408181831.pizpq7n7k4n5u6dh@ws2202.lin.mbt.kalray.eu> <20240408200138.kbl6n5te2joj3csn@ws2202.lin.mbt.kalray.eu> To: Paul Iannetta X-Mailer: Apple Mail (2.3696.120.41.1.8) X-CMAE-Envelope: MS4xfI4t1rgGxJDXclbNfnjSnIhgldeNQKxGzK9JPDAz0S4rULfyHr+QwsyJOaDp8J95JhMpVNdE7Og3DZH3qOSJJQIHG5CSsH2Pmvy24ZKp/SiWlhHSr4kv l06d5tfE/8SFJm2woHX71uy9oGAKjzw/Eca1E/Ur0z1kKCM2S34B9xjOOqf9E3o8Yqc4yO18Kov808wzL0olhUqa9AQPIkbqt5Vl+KXCl91cfzxOYuZDjvHd y0VeKDmqKsv1WqYtZqEyGsZevhjxbgUBmmXpmu2WOEty/OBM24RkgcD8VgvAGZKN X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,SPF_HELO_NONE,SPF_PASS,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 List-Id: > On Apr 8, 2024, at 4:01 PM, Paul Iannetta via Gcc = wrote: >=20 > On Mon, Apr 08, 2024 at 11:26:40AM -0700, Andrew Pinski wrote: >> On Mon, Apr 8, 2024 at 11:20=E2=80=AFAM Paul Iannetta via Gcc = wrote: >>> ... >> Also do you sign or zero extend a 32bit argument for LP64 targets? >> Right now it is not obvious nor documented in your examples. >>=20 >=20 > Another case would be targets allowing an immediate argument for their > syscall instruction. Sign extend is probably always an error, zero > extend may give the expected results.=20 It depends on the ABI. For example, on MIPS, pointers are treated as = signed when extending from 32 to 64 bits. paul