From patchwork Mon Apr 18 21:00:08 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 91852 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 66019B6FCF for ; Tue, 19 Apr 2011 07:03:32 +1000 (EST) Received: from localhost ([::1]:48623 helo=lists2.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvbV-0003zK-MY for incoming@patchwork.ozlabs.org; Mon, 18 Apr 2011 17:03:29 -0400 Received: from eggs.gnu.org ([140.186.70.92]:59322) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvYY-0007Jd-5u for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QBvYX-0004kD-4B for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:26 -0400 Received: from hall.aurel32.net ([88.191.126.93]:44199) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvYW-0004k5-Tf for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:25 -0400 Received: from [2001:470:d4ed:0:5e26:aff:fe2b:6f5b] (helo=volta.aurel32.net) by hall.aurel32.net with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1QBvYW-00028A-8A; Mon, 18 Apr 2011 23:00:24 +0200 Received: from aurel32 by volta.aurel32.net with local (Exim 4.72) (envelope-from ) id 1QBvYV-0005Tb-79; Mon, 18 Apr 2011 23:00:23 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Mon, 18 Apr 2011 23:00:08 +0200 Message-Id: <1303160412-8107-17-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1303160412-8107-1-git-send-email-aurelien@aurel32.net> References: <1303160412-8107-1-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 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. Signed-off-by: Aurelien Jarno Reviewed-by: Peter Maydell --- 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 9628d27..f69458d 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;