Symbian3/SDK/Source/GUID-947317B7-7E12-509B-9A16-F0604D7F8BA2.dita
changeset 13 48780e181b38
parent 12 80ef3a206772
child 14 578be2adaf3e
--- a/Symbian3/SDK/Source/GUID-947317B7-7E12-509B-9A16-F0604D7F8BA2.dita	Fri Jul 16 17:23:46 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,55 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
-<!-- This component and the accompanying materials are made available under the terms of the License 
-"Eclipse Public License v1.0" which accompanies this distribution, 
-and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
-<!-- Initial Contributors:
-    Nokia Corporation - initial contribution.
-Contributors: 
--->
-<!DOCTYPE concept
-  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
-<concept id="GUID-947317B7-7E12-509B-9A16-F0604D7F8BA2" xml:lang="en"><title>armfpu</title><prolog><metadata><keywords/></metadata></prolog><conbody>
-<p> <codeph>armfpu [ vfpv2 | softvfp ]</codeph>  </p>
-<p>Use the <codeph>armfpu</codeph> statement to specify how the compiler is
-to deal with floating point instructions. </p>
-<p>There are two ways in which floating point instructions can be handled
-on an ARM processor: </p>
-<ul>
-<li id="GUID-929D9EEB-1D4A-58DD-8E62-7E14EAB6566B"><p>through the use of floating
-point support functions. </p> </li>
-<li id="GUID-B28E550A-0785-50B5-B260-7F8C85F1CA2A"><p>directly on a hardware
-floating point co-processor, the Vector Floating Point (VFP) unit. </p> </li>
-</ul>
-<table id="GUID-A0C3733D-2744-5094-AF89-EF15737C68E9">
-<tgroup cols="2"><colspec colname="col0"/><colspec colname="col1"/>
-<tbody>
-<row>
-<entry><p> <codeph>softvfp</codeph>  </p> </entry>
-<entry><p>This keyword specifies that floating point instructions are handled
-by floating point support functions. </p> <p>On a device without a VFP unit,
-floating point support functions are implemented in software and operate slowly.
-On a device with a VFP unit, the floating point support functions are handled
-by the VFP unit, and operate faster than when implemented in software. </p> <p>Note
-that applications do not need to make any changes to take advantage of VFP-enabled
-floating point support functions, if they are provided in the device's ROM.
-Such functions are used automatically at run time. </p> <p>If <codeph>armfpu</codeph> is
-not specified in a <filepath>.mmp</filepath> file, then <codeph>armfpu softvfp</codeph> is
-assumed by default. </p> </entry>
-</row>
-<row>
-<entry><p> <codeph>vfpv2</codeph>  </p> </entry>
-<entry><p>This keyword specifies that VFP specific code is to be generated
-at compile time whenever floating point instructions are used. </p> <p>On
-a device with a VFP unit, this option results in code that runs faster than
-the floating point support functions generated by <codeph>softvfp</codeph>.
-Note, however, that binaries produced with VFP specific code do not work on
-devices without a VFP unit. <i>Software Install</i> attempts to prevent their
-installation, but if any such binaries are installed onto a device in some
-other way, for example by inclusion into the ROM at device creation time,
-then a call to VFP specific code results in a KERN-EXEC 3 panic (see also <xref href="GUID-0AF47934-0A16-51A2-9254-992D7C6B322B.dita">Application Installation
-Guide</xref>). </p> </entry>
-</row>
-</tbody>
-</tgroup>
-</table></conbody></concept>
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