From patchwork Wed Apr 20 10:12:05 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 92153 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 78E06B6FD7 for ; Wed, 20 Apr 2011 20:19:35 +1000 (EST) Received: from localhost ([::1]:44173 helo=lists2.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QCUVQ-0004V2-MT for incoming@patchwork.ozlabs.org; Wed, 20 Apr 2011 06:19:32 -0400 Received: from eggs.gnu.org ([140.186.70.92]:43324) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QCUOb-0008WI-79 for qemu-devel@nongnu.org; Wed, 20 Apr 2011 06:12:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QCUOY-0004TA-9w for qemu-devel@nongnu.org; Wed, 20 Apr 2011 06:12:29 -0400 Received: from hall.aurel32.net ([88.191.126.93]:43749) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QCUOY-0004SW-1F for qemu-devel@nongnu.org; Wed, 20 Apr 2011 06:12:26 -0400 Received: from [90.84.144.153] (helo=volta.aurel32.net) by hall.aurel32.net with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1QCUOX-0002qQ-6r; Wed, 20 Apr 2011 12:12:25 +0200 Received: from aurel32 by volta.aurel32.net with local (Exim 4.72) (envelope-from ) id 1QCUOO-0006HW-Sw; Wed, 20 Apr 2011 12:12:16 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Wed, 20 Apr 2011 12:12:05 +0200 Message-Id: <1303294329-22634-17-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1303294329-22634-1-git-send-email-aurelien@aurel32.net> References: <1303294329-22634-1-git-send-email-aurelien@aurel32.net> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 88.191.126.93 Cc: Aurelien Jarno Subject: [Qemu-devel] [PATCH v2 16/20] target-i386: add CPU86_LDouble <-> double conversion functions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add functions to convert CPU86_LDouble to double and vice versa. They are going to be used to implement logarithmic and trigonometric function until softfloat implement them. Reviewed-by: Peter Maydell Signed-off-by: Aurelien Jarno --- target-i386/op_helper.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c index b47d825..d9c8c1b 100644 --- a/target-i386/op_helper.c +++ b/target-i386/op_helper.c @@ -3431,6 +3431,28 @@ void helper_verw(target_ulong selector1) /* x87 FPU helpers */ +static inline double CPU86_LDouble_to_double(CPU86_LDouble a) +{ + union { + float64 f64; + double d; + } u; + + u.f64 = floatx_to_float64(a, &env->fp_status); + return u.d; +} + +static inline CPU86_LDouble double_to_CPU86_LDouble(double a) +{ + union { + float64 f64; + double d; + } u; + + u.d = a; + return float64_to_floatx(u.f64, &env->fp_status); +} + static void fpu_set_exception(int mask) { env->fpus |= mask;