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 X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1654C4338F for ; Tue, 24 Aug 2021 14:34:37 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A9E456127B for ; Tue, 24 Aug 2021 14:34:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A9E456127B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=eldorado.org.br Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:51022 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mIXVc-0007as-MZ for qemu-devel@archiver.kernel.org; Tue, 24 Aug 2021 10:34:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54602) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mIXPV-00077l-Iw; Tue, 24 Aug 2021 10:28:17 -0400 Received: from [201.28.113.2] (port=1602 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mIXPU-0007tk-6B; Tue, 24 Aug 2021 10:28:17 -0400 Received: from power9a ([10.10.71.235]) by outlook.eldorado.org.br with Microsoft SMTPSVC(8.5.9600.16384); Tue, 24 Aug 2021 11:28:08 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by power9a (Postfix) with ESMTP id 5EAE48010FC; Tue, 24 Aug 2021 11:28:08 -0300 (-03) From: Luis Pires To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH 06/19] libdecnumber: introduce decNumberFrom[U]Int128 Date: Tue, 24 Aug 2021 11:27:17 -0300 Message-Id: <20210824142730.102421-7-luis.pires@eldorado.org.br> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210824142730.102421-1-luis.pires@eldorado.org.br> References: <20210824142730.102421-1-luis.pires@eldorado.org.br> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-OriginalArrivalTime: 24 Aug 2021 14:28:08.0540 (UTC) FILETIME=[427931C0:01D798F4] X-Host-Lookup-Failed: Reverse DNS lookup failed for 201.28.113.2 (failed) Received-SPF: pass client-ip=201.28.113.2; envelope-from=luis.pires@eldorado.org.br; helo=outlook.eldorado.org.br X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, PDS_HP_HELO_NORDNS=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Luis Pires , richard.henderson@linaro.org, groug@kaod.org, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This will be used to implement PowerPC's dcffixqq. Signed-off-by: Luis Pires --- include/libdecnumber/decNumber.h | 2 ++ libdecnumber/decNumber.c | 36 ++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/include/libdecnumber/decNumber.h b/include/libdecnumber/decNumber.h index aa115fed07..0cf69c7db2 100644 --- a/include/libdecnumber/decNumber.h +++ b/include/libdecnumber/decNumber.h @@ -116,6 +116,8 @@ decNumber * decNumberFromUInt32(decNumber *, uint32_t); decNumber *decNumberFromInt64(decNumber *, int64_t); decNumber *decNumberFromUInt64(decNumber *, uint64_t); + decNumber *decNumberFromInt128(decNumber *, uint64_t, int64_t); + decNumber *decNumberFromUInt128(decNumber *, uint64_t, uint64_t); decNumber * decNumberFromString(decNumber *, const char *, decContext *); char * decNumberToString(const decNumber *, char *); char * decNumberToEngString(const decNumber *, char *); diff --git a/libdecnumber/decNumber.c b/libdecnumber/decNumber.c index 1ffe458ad8..75c09ba052 100644 --- a/libdecnumber/decNumber.c +++ b/libdecnumber/decNumber.c @@ -167,6 +167,7 @@ /* ------------------------------------------------------------------ */ #include "qemu/osdep.h" +#include "qemu/host-utils.h" #include "libdecnumber/dconfig.h" #include "libdecnumber/decNumber.h" #include "libdecnumber/decNumberLocal.h" @@ -462,6 +463,41 @@ decNumber *decNumberFromUInt64(decNumber *dn, uint64_t uin) return dn; } /* decNumberFromUInt64 */ +decNumber *decNumberFromInt128(decNumber *dn, uint64_t lo, int64_t hi) +{ + uint64_t unsig_hi = hi; + if (hi < 0) { + if (lo == 0) { + unsig_hi = -unsig_hi; + } else { + unsig_hi = ~unsig_hi; + lo = -lo; + } + } + + decNumberFromUInt128(dn, lo, unsig_hi); + if (hi < 0) { + dn->bits = DECNEG; /* sign needed */ + } + return dn; +} /* decNumberFromInt128 */ + +decNumber *decNumberFromUInt128(decNumber *dn, uint64_t lo, uint64_t hi) +{ + uint64_t rem; + Unit *up; /* work pointer */ + decNumberZero(dn); /* clean */ + if (lo == 0 && hi == 0) { + return dn; /* [or decGetDigits bad call] */ + } + for (up = dn->lsu; hi > 0 || lo > 0; up++) { + divu128(&lo, &hi, &rem, DECDPUNMAX + 1); + *up = (Unit)rem; + } + dn->digits = decGetDigits(dn->lsu, up - dn->lsu); + return dn; +} /* decNumberFromUInt128 */ + /* ------------------------------------------------------------------ */ /* to-int64 -- conversion to int64 */ /* */ -- 2.25.1