From patchwork Thu Apr 29 08:03:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Marie de Rodat X-Patchwork-Id: 1471573 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=sourceware.org; envelope-from=gcc-patches-bounces@gcc.gnu.org; receiver=) Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4FW7NK0swdz9sW7 for ; Thu, 29 Apr 2021 18:05:37 +1000 (AEST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 6B32B3A1900A; Thu, 29 Apr 2021 08:04:07 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from rock.gnat.com (rock.gnat.com [IPv6:2620:20:4000:0:a9e:1ff:fe9b:1d1]) by sourceware.org (Postfix) with ESMTP id 12EFB3A19036 for ; Thu, 29 Apr 2021 08:03:55 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 12EFB3A19036 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=adacore.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=derodat@adacore.com Received: from localhost (localhost.localdomain [127.0.0.1]) by filtered-rock.gnat.com (Postfix) with ESMTP id 3AF04561C4; Thu, 29 Apr 2021 04:03:48 -0400 (EDT) X-Virus-Scanned: Debian amavisd-new at gnat.com Received: from rock.gnat.com ([127.0.0.1]) by localhost (rock.gnat.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id QMtPxUavqWbh; Thu, 29 Apr 2021 04:03:48 -0400 (EDT) Received: from tron.gnat.com (tron.gnat.com [IPv6:2620:20:4000:0:46a8:42ff:fe0e:e294]) by rock.gnat.com (Postfix) with ESMTP id 14298561C0; Thu, 29 Apr 2021 04:03:48 -0400 (EDT) Received: by tron.gnat.com (Postfix, from userid 4862) id 135A7193; Thu, 29 Apr 2021 04:03:48 -0400 (EDT) Date: Thu, 29 Apr 2021 04:03:48 -0400 From: Pierre-Marie de Rodat To: gcc-patches@gcc.gnu.org Subject: [Ada] Change rounding mode of 'Machine for static floating point Message-ID: <20210429080348.GA134047@adacore.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Status: No, score=-12.3 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eric Botcazou Errors-To: gcc-patches-bounces@gcc.gnu.org Sender: "Gcc-patches" This changes the rounding mode used for the static evaluation of the Machine attribute of floating-point types to the mode used for the static evaluation of real expressions, for the sake of consistency. Tested on x86_64-pc-linux-gnu, committed on trunk gcc/ada/ * sem_attr.adb (Eval_Attribute) : Use Round_Even instead of Round in the call to the Machine routine. diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb --- a/gcc/ada/sem_attr.adb +++ b/gcc/ada/sem_attr.adb @@ -9107,11 +9107,13 @@ package body Sem_Attr is -- Machine -- ------------- + -- We use the same rounding mode as the one used for RM 4.9(38) + when Attribute_Machine => Fold_Ureal (N, Eval_Fat.Machine - (P_Base_Type, Expr_Value_R (E1), Eval_Fat.Round, N), + (P_Base_Type, Expr_Value_R (E1), Eval_Fat.Round_Even, N), Static); ------------------