厦门莫格电气自动化有限公司销售Honeywell霍尼韦尔82408485-001您迈开询价的一小步，我还您成功的一大步。​82408485-00182408485-00182408485-001FloatPointUnit，浮点运算单元是专用于浮点运算的协处理器，在计算领域，例如三角函数以及时域频域变换通常会用到浮点运算。当CPU执行一个需要浮点数运算的程序时，有三种方式可以执行：软件仿真器（浮点运算函数库）、附加浮点运算器和集成浮点运算单元。区别于以往的AR***处理器，目前基于ContexTM构架的ARM处理均集成了浮点运算单元。如下图ToradexARM核心板产品所示，NvidiaTegraTM2,TegraTM3和NXP/Freescalei.MX6集成了VFPv3浮点运算单元。NXP/Freescalei.MX7集成了VFPv4浮点运算单元。ARM浮点架构(VFP)为半精度、单精度和双精度浮点运算中的浮点操作提供硬件支持。它完全符合IEEE754标准，并提供完全软件库支持，与NEONTM多媒体处理功能结合使用时，可增强图像应用程序的性能（如缩放、2D和3D转换、字体生成和数字过滤）。基于ToradexColibriT20和Colibri/ApalisT30使用FPUColibriT20核心板带有一个VFPv3-D16浮点运算单元(不带NEON)，而ColibriT30和ApalisT30带有一个VFPv3-D32(含有NEON)，通过以下的配置，将能够有效的提高浮点运输的效率，运算量愈大愈明显。./WindowsCE编译器的浮点优化在VisualStudio2008环境中，你可以直接为上述核心板生成含有浮点处理器加速的代码，请在您的工程中按照以下步骤进行：对于WinCE6:-打开“Project”菜单并选择“Properties”.-选择“ConfigurationProperties:C/C++:Advanced”.-改变“Enablefloatingpointemulation”为“No”.-改变“Compileforarchitecture”为“ARM5T/QRarch5t”.-选择“ConfigurationProperties:C/C++:CommandLine:AdditionalOpti***”.-添加“/QRfpe-“tothesetofopti***.-关闭对话框并选择"OK".对于WinCE7:-打开"Project"菜单并选择"Properties".-选择"ConfigurationProperties:C/C++:CommandLine:AdditionalOpti***".-添加"/QRfpe-"tothesetofopti***.-关闭对话框并选择"OK".请注意，这些功能在VisualStudio2005不能被实现。./性能比较举例通过MarkRiordanbenchmarkprogram我们做了一个简单c代码的性能比较程序。我们计算了这个循环所需要的时间如下，时间越短性能越好：F&TFKG27UF125V*USED*ITWRANSBURG74735*NICE*ADAPTECTRANTORT160SCSI*USED*HALDEXBARNES8498*USED*DAIICHIKEIKITHERMOMETER0-100DEGREESC*USED*EUCHNERTZ1LE024BHA*USED*C1903ABBS283K63A*USED*TRANSAMERICADEL***ALSWITCHFLOW44718*USED*DAYTONRELAY1A488N24VDC*USED*SOLA/HEVI-DUTYGLQ-01-200*NEWOUTOFABOX*IFMEFECTORE18026*USED*NSDCORP.SYSTEMCARDSW-VS2-04E-03*USED*ALLENBRADLEY42MTB-5000SERIESB*NEWINABOX*LIQUIDCONTROLSM7-41800-3*USED*A&DELECTRONICBALANCEER-182A*USED*POSTGLOVERCZ353179RESISTOR*USED*RIDGEWOODUSA45CP012THERMATOOLTRIGGER*USED*WORCESTERCONTROLS2039SNPNEUMATICACTUATOR(ASPICTUR...WORCESTERCONTROLS1039SNPNEUMATICACTUATOR(ASPICTUR...MODICON610MSA20531*USED*WARNERELECTRIC5201-451-057*USED*LOTOF2CUSTOMCONTROLSENSORS611G8001NUMATICSVALVE12SAD4410A*NICE*NIPPONCHEMI-CON4700UFLOWESRCAPACITOR*USED*ALKONP-070DP193*NICE*PARKERC525-FHHANDOPERATEDVALVE1/4"*USED*FESTODSNU-25-267-PPV?-A*USED*WEBGUIDESCANNER-SPLICERRELAY7920395310112*USED*FANUCA02B-0098-C045/?TAR*NEWOUTOFBOX*CUTTLER-HAMMERAN16DN0*USED*CLARKTB10319220-240VCOIL*USED*SQUAREDFAL24100CIRCUITBREAKER*USED*LOTOF2***CD-B54*USED*SQUAREDCIRCUITBREAKERFAL36035*USED*LOTOF3POTTER&BRUMFIELDCHB-38-70002*USED*STI43763-0010SAFETYRELAY*USED*SKINNERVALVEV52DB2125*NICE*BANNERQ236EQ1*USED*BUS***ANNCH60J31600V*USED*INTERNATIONALRECTIFIERCANADAC03-1548*USED*OMRONE2E2-X10Y2-US*USED*BUS***ANNCH60J3I600V*USED*NAMCOEE530-70400*USED*SQUARED9012-ACW-3*USED*SQUARED8501-DO-2O*USED*TELEMECANIQUEL100WNC*USED*CUTLER-HAMMER10250T*USED*DUFF-NORTONCO.SKA6000A10ROTARYLIMITSWITCH*USED*POWERTEC,INC.POWERSUPPLY19C-BOI-ABD*USED*BRADYOVERSIZEDBREAKERLOCKOUT65329*NEWINBOX*KEYSTONEF79U-012U*USED*MERLINGERIN38033*USED*SY/MAXPROCESSOR8020-SCP-311*NICE*RACINESBAH-C02S*USED*MODICONAS-P120-000POWERSUPPLY*USED*ASHCROFT451279SSL04L15#DURAGAUGESOLIDFRONT*USED*NEMIC-LAMBDALTD.NES120-24100-240VINDUSTRIALPOWER...HORNERELECTRICHE670IBU100BUSINTERFACEUNIT*USED*BALLUFFBNS519-B2-R10-46-1?3*USED*SANYODENKI9WF0424F6D03*USED*LOTOF3LUMBERGAUTOMATI?ONRST3-RKWT4-3-610/6M*USED****CCYLINDERCDM2RA20-50-K59?WL-X339*USED*STOCKHAMFIG.B-1201'*USED*CUTLERHAMMERE51DS1SER.C1PROXIMITYSENSORHEAD*USED...NTEELECTRONICSINC.RELAYR04-7A30-120120V*USED*TURCKNi10-G18K-AP6X7M*USED*TURCKNI4-M12-AP6X-H1?141*ASIS*ALLENBRADLEY802T-R2TDSER.1LIMITSWITCH*USED*ALLENBRADLEY1492-CB1G150SERIESA*USED*POTTER&BRUMFIELDCGB-38-70010M*USED*MACVALVEINC.6241C-000-PM-11?1DASOLENOIDVALVE*USED*MACVALVEINC.6231C-211-PM-11?1DASOLENOIDVALVE*USED*BERNSTENTK-21-126302121030MAGNETICSENSOR*NEWOUTO...FERRAZSHAWMUTFSPDB5ACU9*USED*FRESTO***EO-1-LED-24-K?5*USED*ALLENBRADLEY1769-IQ6XOW4SER.BCOMBINATIONINPUTREL...SCHMERSALAZ335-11zk-M20*USED*TELEMECANIQUEXCK-J...H7*USED*MICROMOTION1004302REV.A*NEWOUTOFABOX*PEPPERL+FUCHSVISOLVXRLK28-55-Z/31/1?16*USED*MOELLERVGBDIL24*USED*TELEMECANIQUEXCS-A503*USED*GETHED136030MOLDEDCASECIRCUITBREAKER*NEWINABOX...FUJIELECTRICBM3RSB-001MOTORSTARTERW/BZ0WUABRAUXI...ALLENBRADLEY872C-DH5NP18-D4SER.A*USED*ALLENBRADLEYPHOTOSWITCHTRANSBEAMRECEIVERPHOTOHEAD...TELEMECANIQUEXCK-J5954F0H4*USED*NUMATICS12SAD443AAPNEUMATICVALVE*USED*)