From patchwork Fri Sep 10 11:26:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Fernando Fujita Pires X-Patchwork-Id: 1526487 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=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4H5Z3Y0J0xz9t0T for ; Fri, 10 Sep 2021 21:51:53 +1000 (AEST) Received: from localhost ([::1]:53092 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mOf4Q-0001K5-Of for incoming@patchwork.ozlabs.org; Fri, 10 Sep 2021 07:51:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49030) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mOegZ-0002nB-NM; Fri, 10 Sep 2021 07:27:11 -0400 Received: from [201.28.113.2] (port=13634 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mOegY-0001ua-6g; Fri, 10 Sep 2021 07:27:11 -0400 Received: from power9a ([10.10.71.235]) by outlook.eldorado.org.br with Microsoft SMTPSVC(8.5.9600.16384); Fri, 10 Sep 2021 08:26:52 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by power9a (Postfix) with ESMTP id D77DC800C19; Fri, 10 Sep 2021 08:26:51 -0300 (-03) From: Luis Pires To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH v3 09/22] libdecnumber: introduce decNumberFrom[U]Int128 Date: Fri, 10 Sep 2021 08:26:11 -0300 Message-Id: <20210910112624.72748-10-luis.pires@eldorado.org.br> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210910112624.72748-1-luis.pires@eldorado.org.br> References: <20210910112624.72748-1-luis.pires@eldorado.org.br> MIME-Version: 1.0 X-OriginalArrivalTime: 10 Sep 2021 11:26:52.0088 (UTC) FILETIME=[C0A01380:01D7A636] 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, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This will be used to implement PowerPC's dcffixqq. Signed-off-by: Luis Pires Reviewed-by: Richard Henderson --- 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 */ /* */