From patchwork Fri Jan 7 09:26:24 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 77861 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 3BB9BB7146 for ; Fri, 7 Jan 2011 20:28:48 +1100 (EST) Received: from localhost ([127.0.0.1]:47461 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Pb8cm-0006KP-Jg for incoming@patchwork.ozlabs.org; Fri, 07 Jan 2011 04:28:44 -0500 Received: from [140.186.70.92] (port=43476 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Pb8ad-00061r-5I for qemu-devel@nongnu.org; Fri, 07 Jan 2011 04:26:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Pb8ab-0005tD-Tk for qemu-devel@nongnu.org; Fri, 07 Jan 2011 04:26:30 -0500 Received: from mnementh.archaic.org.uk ([81.2.115.146]:47395) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Pb8ab-0005sS-Kn for qemu-devel@nongnu.org; Fri, 07 Jan 2011 04:26:29 -0500 Received: from pm215 by mnementh.archaic.org.uk with local (Exim 4.69) (envelope-from ) id 1Pb8aZ-0006KO-3B for qemu-devel@nongnu.org; Fri, 07 Jan 2011 09:26:27 +0000 From: Peter Maydell To: qemu-devel@nongnu.org Date: Fri, 7 Jan 2011 09:26:24 +0000 Message-Id: <1294392387-24300-2-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1294392387-24300-1-git-send-email-peter.maydell@linaro.org> References: <1294392387-24300-1-git-send-email-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Subject: [Qemu-devel] [PATCH 1/4] softfloat: Add float32_is_zero_or_denormal() function X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add a utility function to softfloat to test whether a float32 is zero or denormal. Signed-off-by: Peter Maydell Reviewed-by: Aurelien Jarno --- fpu/softfloat.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fpu/softfloat.h b/fpu/softfloat.h index 15052cc..1acf7af 100644 --- a/fpu/softfloat.h +++ b/fpu/softfloat.h @@ -336,6 +336,11 @@ INLINE int float32_is_any_nan(float32 a) return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); } +INLINE int float32_is_zero_or_denormal(float32 a) +{ + return (float32_val(a) & 0x7f800000) == 0; +} + #define float32_zero make_float32(0) #define float32_one make_float32(0x3f800000) #define float32_ln2 make_float32(0x3f317218)