【英文标准名称】:Informationtechnology-Languageindependentarithmetic-Part2:Elementarynumericalfunctions
【原文标准名称】:信息技术独立语言运算第2部分：基本数字功能
【标准号】:ISO/IEC10967-2-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:程序设计;算术;接口;信息技术;定义;程序设计语言;数据处理;计算机软件
【英文主题词】:Arithmetic;Computersoftware;Dataprocessing;Definition;Definitions;Informationtechnology;Interfaces(dataprocessing);Programming;Programminglanguages
【摘要】:ThispartofISO/IEC10967definesthepropertiesofnumericalapproximationsformanyoftherealelementarynumericalfunctionsavailableinstandardlibrariesforavarietyofprogramminglanguagesincommonuseformathematicalandnumericalapplications.Animplementormaychooseanycombinationofhardwareandsoftwaresupporttomeetthespecificationsofthispart.Itisthecomputingenvironment,asseenbytheprogrammer/user,thatdoesordoesnotconformtothespecifications.Thetermimplementation(ofthispart)denotesthetotalcomputingenvironmentpertinenttothispart,includinghardware,languageprocessors,subroutinelibraries,exceptionhandlingfacilities,othersoftware,anddocumentation.1InclusionsThespecificationsofpart1areincludedbyreferenceinthispart.Thispartprovidesspecificationsfornumericalfunctionsforwhichalloperandvaluesareofintegerorfloatingpointdatatypessatisfyingtherequirementsofpart1.Boundariesfortheoc-currenceofexceptionsandthemaximumerrorallowedareprescribedforeachspecifiedoperation.Alsotheresultproducedbygivingaspecialvalueoperand,suchasaninfinity,oraNaN,isprescribedforeachspecifiedfloatingpointoperation.ThispartcoversmostnumericalfunctionsrequiredbytheISO/IECstandardsforAda[11],Basic[16],C[17],C++[18],Fortran[22],ISLisp[24],Pascal[27],andPL/I[29].Inparticular,specificationsareprovidedfor:a)Someadditionalintegeroperations.b)Someadditionalnon-transcendentalfloatingpointoperations,includingmaximumandmin-imumoperations.c)Exponentiations,logarithms,andhyperbolics.d)Trigonometries,bothinradiansandforargument-givenangularunitwithdegreesasaspecialcase.Thispartalsoprovidesspecificationsfor:e)Conversionsbetweenintegerandfloatingpointdatatypes(possiblywithdifferentradices)conformingtotherequirementsofpart1,andtheconversionoperationsused,forexample,intextinputandoutputofintegerandfloatingpointnumbers.f)TheresultsproducedbyanincludedfloatingpointoperationwhenoneormoreargumentvaluesareIEC60559specialvalues.g)Program-visibleparametersthatcharacterisecertainaspectsoftheoperations.2ExclusionsThispartprovidesnospecificationsfora)Numericalfunctionswhoseoperandsareofmorethanonedatatype(withoneexception).Thispartneitherrequiresnorexcludesthepresenceofsuch"mixedoperand"operations.b)Anintervaldatatype,ortheoperationsonsuchdata.Thispartneitherrequiresnorexcludessuchdataoroperations.c)Afixedpointdatatype,ortheoperationsonsuchdata.Thispartneitherrequiresnorexcludessuchdataoroperations.d)Arationaldatatype,ortheoperationsonsuchdata.Thispartneitherrequiresnorexcludessuchdataoroperations.e)Complex,matrix,statistical,orsymbolicoperations.Thispartneitherrequiresnorexcludessuchdataoroperations.f)Thepropertiesofarithmeticdatatypesthatarenotrelatedtothenumericalprocess,suchastherepresentationofvaluesonphysicalmedia.g)Thepropertiesofintegerandfloatingpointdatatypesthatproperlybelonginprogramminglanguagestandardsorotherspecifications.Examplesinclude1)thesyntaxofnumeralsandexpressionsintheprogramminglanguage,2)thesyntaxusedforparsed(input)orgenerated(output)characterstringformsfornumeralsbyanyspecificprogramminglanguageorlibrary,3)theprecedenceofoperatorsintheprogramminglanguage,4)thepresenceorabsenceofautomaticdatatypecoercions,5)therulesforassignment,parameterpassing,andreturningvalue,6)theconsequencesofapplyinganoperationtovaluesofimproperdatatype,ortounini-tialiseddata.Furthermore,thispartdoesnotprovidespecificationsforhowtheoperationsshouldbeimple-mentedorwhichalgorithmsaretobeusedforthevariousoperations.
【中国标准分类号】:L74
【国际标准分类号】:35_060
【页数】:177P;A4
【正文语种】:英语