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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p><b>picoJava</b> is a <a href="Microprocessor" title="Microprocessor">microprocessor</a> specification dedicated to <a href="Native_code" class="mw-redirect" title="Native code">native execution</a> of <a href="Java_bytecode" title="Java bytecode">Java bytecode</a> without the need for an <a href="Interpreter_(computing)" title="Interpreter (computing)">interpreter</a> or <a href="Just-in-time_compilation" title="Just-in-time compilation">just-in-time compilation</a>. The aim is to speed bytecode execution up by up to 20 times, compared to standard Intel <a href="Central_processing_unit" title="Central processing unit">CPU</a> with a <a href="Java_virtual_machine" title="Java virtual machine">Java virtual machine</a>.<sup id="cite_ref-webopedia_1-0" class="reference"><a href="#cite_note-webopedia-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="GNU_Compiler_Collection" title="GNU Compiler Collection">GNU Compiler Collection</a> added picoJava support in 1999 as machine definition 'pj,'.<sup id="cite_ref-GCC-ML_2-0" class="reference"><a href="#cite_note-GCC-ML-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The open-source version of picoJava has been implemented in an <a href="FPGA" class="mw-redirect" title="FPGA">FPGA</a>.<sup id="cite_ref-pj2-in-FPGA_3-0" class="reference"><a href="#cite_note-pj2-in-FPGA-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Jazelle" title="Jazelle">Jazelle</a></li>
<li><a href="MAJC" title="MAJC">MAJC</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2></div>
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</style><div class="cite-bracket" style="column-width: <sup id=" id="cite_ref-pj2-in-FPGA_3-1">
<ol class="references">
<li id="cite_note-webopedia-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-webopedia_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-webopedia_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">
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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.webopedia.com/TERM/P/picoJava.html">"What is picoJava? Webopedia Definition"</a>. <i>www.webopedia.com</i>. 10 June 1999<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-06-04</span></span>.</cite></span>
</li>
<li id="cite_note-GCC-ML-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-GCC-ML_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-GCC-ML_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">
<cite class="citation mailinglist cs1"><a rel="nofollow" class="external text" href="https://gcc.gnu.org/ml/gcc-patches/1999-10n/msg00599.html">"Patch: Support for picoJava"</a>. <i>gcc-patches</i> (Mailing list). 22 Oct 1999.</cite></span>
</li>
<li id="cite_note-pj2-in-FPGA-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-pj2-in-FPGA_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pj2-in-FPGA_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">
Puffitsch, W. and Schoeberl, M. 2007. picoJava-II in an FPGA. In Proceedings of the 5th international Workshop on Java Technologies For Real-Time and Embedded Systems (Vienna, Austria, September 26–28, 2007). JTRES '07, vol. 231. ACM, New York, NY, 213-221. <a rel="nofollow" class="external free" href="http://doi.acm.org/10.1145/1288940.1288972">http://doi.acm.org/10.1145/1288940.1288972</a></span>
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<ul><li>McGhan, Harlan; O’Connor, Mike (October 1998). "PicoJava: A Direct Execution Engine For Java Bytecode". <i><a href="Computer_(magazine)" title="Computer (magazine)">Computer</a></i>, Volume 31, Issue 10: pp. 22–30.</li>
<li>O’Connor, J. Michael; <a href="Marc_Tremblay" title="Marc Tremblay">Tremblay, Marc</a> (March/April 1997). "picoJava-I: The Java Virtual Machine in Hardware". <i><a href="IEEE_Micro" title="IEEE Micro">IEEE Micro</a></i>, Volume 17, Issue 2: pp. 45–53.</li>
<li>Hangal, Sudheendra; O'Connor, J. Michael (May/June 1999). "Performance analysis and validation of the picoJava processor." <i><a href="IEEE_Micro" title="IEEE Micro">IEEE Micro</a></i>, Volume 19, Issue 3.</li></ul>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><a rel="nofollow" class="external text" href="http://www.sun.com/software/communitysource/processors/picojava.xml">picoJava</a> at Sun Community Source Licensing (SCSL)</li>
<li><a rel="nofollow" class="external text" href="http://pr.fujitsu.com/en/news/2000/04/5.html">Release announcement (Fujitsu)</a></li></ul>
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</style><div id="Sun_Microsystems214" style="font-size:114%;margin:0 4em"><a href="Sun_Microsystems" title="Sun Microsystems">Sun Microsystems</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div><a href="Acquisition_of_Sun_Microsystems_by_Oracle_Corporation" title="Acquisition of Sun Microsystems by Oracle Corporation">Acquired by Oracle</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Hardware</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Systems</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Sun-1" title="Sun-1">Sun-1</a></li>
<li><a href="Sun-2" title="Sun-2">Sun-2</a></li>
<li><a href="Sun-3" title="Sun-3">Sun-3</a></li>
<li><a href="Sun386i" title="Sun386i">Sun386i</a></li>
<li><a href="Sun-4" title="Sun-4">Sun-4</a></li>
<li><a href="SPARCstation" title="SPARCstation">SPARCstation</a>–server–center
<ul><li><a href="SPARCstation_1" title="SPARCstation 1">1</a></li>
<li><a href="SPARCstation_2" title="SPARCstation 2">2</a></li>
<li><a href="SPARCstation_4" class="mw-redirect" title="SPARCstation 4">4</a></li>
<li><a href="SPARCstation_5" title="SPARCstation 5">5</a></li>
<li><a href="SPARCstation_10" title="SPARCstation 10">10</a></li>
<li><a href="SPARCstation_20" title="SPARCstation 20">20</a></li>
<li><a href="SPARCclassic" title="SPARCclassic">classic</a></li>
<li><a href="SPARCstation_IPC" title="SPARCstation IPC">IPC</a></li>
<li><a href="SPARCstation_IPX" title="SPARCstation IPX">IPX</a></li>
<li><a href="SPARCstation_LX" title="SPARCstation LX">LX</a></li>
<li><a href="SPARCstation_ZX" title="SPARCstation ZX">ZX</a></li></ul></li>
<li><a href="Sun_Netra" title="Sun Netra">Netra</a></li>
<li><a href="Sun_Ultra" title="Sun Ultra">Ultra</a>
<ul><li><a href="Ultra_1" title="Ultra 1">1</a></li>
<li><a href="Ultra_2" class="mw-redirect" title="Ultra 2">2</a></li>
<li><a href="Ultra_5/10" title="Ultra 5/10">5</a></li>
<li><a href="Ultra_5/10" title="Ultra 5/10">10</a></li>
<li><a href="Ultra_24" title="Ultra 24">24</a></li>
<li><a href="Ultra_30" title="Ultra 30">30</a></li>
<li><a href="Ultra_60" title="Ultra 60">60</a></li>
<li><a href="Ultra_80" title="Ultra 80">80</a></li></ul></li>
<li><a href="Sun_Enterprise" title="Sun Enterprise">Enterprise</a>
<ul><li><a href="Sun_Enterprise_10000" class="mw-redirect" title="Sun Enterprise 10000">10000</a></li></ul></li>
<li><a href="Sun_Blade" title="Sun Blade">Blade server</a></li>
<li><a href="Sun_Blade_(workstation)" title="Sun Blade (workstation)">Blade workstation</a></li>
<li><a href="Sun_Fire" title="Sun Fire">Fire</a>
<ul><li><a href="Sun_Fire_12K" class="mw-redirect" title="Sun Fire 12K">12K</a></li>
<li><a href="Sun_Fire_15K" title="Sun Fire 15K">15K</a></li>
<li><a href="Sun_Fire_E25K" class="mw-redirect" title="Sun Fire E25K">E25K</a></li>
<li><a href="Sun_Fire_T2000" title="Sun Fire T2000">T2000</a></li>
<li><a href="Sun_Fire_X4500" title="Sun Fire X4500">X4500</a></li></ul></li>
<li><a href="SPARC_Enterprise" title="SPARC Enterprise">SPARC Enterprise</a></li>
<li><a href="JavaStation" title="JavaStation">JavaStation</a></li>
<li><a href="Sun_Java_Workstation" title="Sun Java Workstation">Java Workstation</a></li>
<li><a href="Sun_Ray" title="Sun Ray">Ray</a></li>
<li><a href="Cobalt_Qube" title="Cobalt Qube">Cobalt Qube</a></li>
<li><a href="Cobalt_RaQ" title="Cobalt RaQ">Cobalt RaQ</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Processors</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="SPARC" title="SPARC">SPARC</a></li>
<li><a href="MB86900" title="MB86900">MB86900</a></li>
<li><a href="MicroSPARC" title="MicroSPARC">microSPARC</a></li>
<li><a href="SuperSPARC" title="SuperSPARC">SuperSPARC</a></li>
<li><a href="UltraSPARC" title="UltraSPARC">UltraSPARC</a></li>
<li><a href="UltraSPARC_II" title="UltraSPARC II">UltraSPARC II</a>
<ul><li>UltraSPARC IIe</li>
<li>UltraSPARC IIi</li>
<li>Gemini</li></ul></li>
<li><a href="UltraSPARC_III" title="UltraSPARC III">UltraSPARC III</a>
<ul><li>UltraSPARC III Cu</li>
<li>UltraSPARC IIIi</li></ul></li>
<li><a href="UltraSPARC_IV" title="UltraSPARC IV">UltraSPARC IV</a></li>
<li><a href="UltraSPARC_T1" title="UltraSPARC T1">UltraSPARC T1</a></li>
<li><a href="UltraSPARC_T2" title="UltraSPARC T2">UltraSPARC T2</a></li>
<li><a href="SPARC_T3" title="SPARC T3">SPARC T3</a></li>
<li><a href="SPARC_T4" title="SPARC T4">SPARC T4</a></li>
<li><a href="SPARC_T5" title="SPARC T5">SPARC T5</a></li>
<li><a href="Rock_(processor)" title="Rock (processor)">Rock</a></li>
<li><a href="MAJC" title="MAJC">MAJC</a></li></ul>
</div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Sun4d" title="Sun4d">Sun4d</a></li>
<li><a href="SBus" title="SBus">SBus</a></li>
<li><a href="Fireplane" title="Fireplane">Fireplane</a></li>
<li><a href="LOM_port" title="LOM port">LOM port</a></li>
<li><a href="MBus_(SPARC)" title="MBus (SPARC)">MBus</a></li>
<li><a href="Sun_Modular_Datacenter" title="Sun Modular Datacenter">Modular Datacenter</a></li>
<li><a href="Sun_Neptune" title="Sun Neptune">Neptune</a></li>
<li><a href="System_Service_Processor" title="System Service Processor">System Service Processor</a></li>
<li><a href="SPARC_T_series" title="SPARC T series">SPARC T series</a></li>
<li><a href="Sun_SPOT" title="Sun SPOT">SPOT</a></li>
<li><a href="Ultra_Port_Architecture" title="Ultra Port Architecture">Ultra Port Architecture</a></li>
<li><a href="Visual_Instruction_Set" title="Visual Instruction Set">Visual Instruction Set</a></li></ul>
</div></td></tr></tbody></table><div></div></td><td class="noviewer navbox-image" rowspan="9" style="width:1px;padding:0 0 0 2px"><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Software</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="TOPS_(file_server)" title="TOPS (file server)">TOPS</a></li>
<li><a href="SunOS" title="SunOS">SunOS</a></li>
<li><a href="Oracle_Solaris" title="Oracle Solaris">Solaris</a></li>
<li><a href="Network_Information_Service" title="Network Information Service">NIS</a>
<ul><li><a href="NIS%2B" title="NIS+">NIS+</a></li></ul></li>
<li><a href="Network_File_System" title="Network File System">NFS</a></li>
<li><a href="Oracle_ZFS" title="Oracle ZFS">ZFS</a>
<ul><li><a href="ZFS%2B" title="ZFS+">ZFS+</a></li></ul></li>
<li><a href="SunView" title="SunView">SunView</a></li>
<li><a href="NeWS" title="NeWS">NeWS</a></li>
<li><a href="OpenWindows" title="OpenWindows">OpenWindows</a></li>
<li><a href="Java_Desktop_System" title="Java Desktop System">Java Desktop System</a></li>
<li><a href="Oracle_Developer_Studio" title="Oracle Developer Studio">Studio</a></li>
<li><a href="Java_(software_platform)" title="Java (software platform)">Java</a></li>
<li><a href="StarOffice" title="StarOffice">StarOffice</a></li>
<li><a href="IPlanet" title="IPlanet">iPlanet</a></li>
<li><a href="Sun_Java_System" title="Sun Java System">Java System</a></li>
<li><a href="Oracle_Secure_Global_Desktop" title="Oracle Secure Global Desktop">Sun Secure Global Desktop</a></li>
<li><a href="MySQL" title="MySQL">MySQL</a></li>
<li><a href="Sun_xVM" title="Sun xVM">xVM</a></li>
<li><a href="GlassFish" title="GlassFish">GlassFish</a></li>
<li><a href="VirtualBox" title="VirtualBox">VirtualBox</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Storage</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Sun_StorageTek_5800_System" title="Sun StorageTek 5800 System">StorageTek 5800 System</a></li>
<li><a href="StorageTek_SL8500" title="StorageTek SL8500">StorageTek SL8500</a></li>
<li><a href="Sun_Open_Storage" title="Sun Open Storage">Open Storage</a></li>
<li><a href="QFS" title="QFS">QFS</a></li>
<li><a href="Oracle_ZFS" title="Oracle ZFS">ZFS</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Performance</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Sun_Cloud" title="Sun Cloud">Cloud</a></li>
<li><a href="Sun_Constellation_System" title="Sun Constellation System">Constellation System</a></li>
<li><a href="Sun_Visualization_System" title="Sun Visualization System">Visualization System</a></li>
<li><a href="Oracle_Grid_Engine" title="Oracle Grid Engine">Grid Engine</a></li>
<li><a href="Lustre_(file_system)" title="Lustre (file system)">Lustre</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Research</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Oracle_Labs" title="Oracle Labs">Sun Microsystems Laboratories</a></li>
<li><a href="Fortress_(programming_language)" title="Fortress (programming language)">Fortress</a></li>
<li><a href="Project_Looking_Glass" title="Project Looking Glass">Project Looking Glass</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Education</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="BlueJ" title="BlueJ">BlueJ</a></li>
<li><a href="Curriki" title="Curriki">Global Education & Learning Community</a></li>
<li><a href="Oracle_Certification_Program" title="Oracle Certification Program">SCPs</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Acquisitions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Afara_Websystems" title="Afara Websystems">Afara Websystems</a></li>
<li><a href="Cobalt_Networks" title="Cobalt Networks">Cobalt Networks</a></li>
<li><a href="Gridware" class="mw-redirect" title="Gridware">Gridware</a></li>
<li><a href="Lighthouse_Design" title="Lighthouse Design">Lighthouse Design</a></li>
<li><a href="Montalvo_Systems" title="Montalvo Systems">Montalvo Systems</a></li>
<li><a href="MySQL_AB" title="MySQL AB">MySQL AB</a></li>
<li><a href="Pixo" title="Pixo">Pixo</a></li>
<li><a href="Procom_Technology" title="Procom Technology">Procom Technology</a></li>
<li><a href="SavaJe" title="SavaJe">SavaJe</a></li>
<li><a href="StorageTek" title="StorageTek">StorageTek</a></li>
<li><a href="Tarantella%2C_Inc." title="Tarantella, Inc.">Tarantella</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Slogans</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="The_Network_is_the_Computer" title="The Network is the Computer">The Network is the Computer</a></li>
<li><a href="Write_once%2C_run_anywhere" title="Write once, run anywhere">Write once, run anywhere</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Community</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Common_Development_and_Distribution_License" title="Common Development and Distribution License">Common Development and Distribution License</a></li>
<li><a href="Java_Community_Process" title="Java Community Process">Java Community Process</a></li>
<li><a href="NetBeans" title="NetBeans">NetBeans</a></li>
<li><a href="OpenOffice.org" title="OpenOffice.org">OpenOffice.org</a></li>
<li><a href="OpenSolaris" title="OpenSolaris">OpenSolaris</a></li>
<li><a href="OpenSPARC" title="OpenSPARC">OpenSPARC</a></li>
<li><a href="OpenJDK" title="OpenJDK">OpenJDK</a></li>
<li><a href="Open_Source_University_Meetup" title="Open Source University Meetup">Open Source University Meetup</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="List_of_Sun_Microsystems_employees" title="List of Sun Microsystems employees">People</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bill_Joy" title="Bill Joy">Bill Joy</a></li>
<li><a href="Andy_Bechtolsheim" title="Andy Bechtolsheim">Andy Bechtolsheim</a></li>
<li><a href="Scott_McNealy" title="Scott McNealy">Scott McNealy</a></li>
<li><a href="Vinod_Khosla" title="Vinod Khosla">Vinod Khosla</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div>Category</div></td></tr></tbody></table></div>
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