HLASM: V1R6 Language Ref

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Data attributesTable 51. Data attributes (continued)Attribute Purpose Main UsesScaling Refers to the position of the decimalpoint in fixed-point, floating-point anddecimal constantsInteger Is a function of the length and scaleattributes of decimal, fixed-point, andfloating-point constantsCount Gives the number of charactersrequired to represent dataNumber¹ Gives the number of sublist entries in amacro instruction operand sublist, orthe maximum subscript of adimensioned SET symbol to which avalue has been assigned.Defined Shows whether the symbol referencedhas been defined prior to the attributereferenceOperation Code Shows whether a given operation codehas been defined prior to the attributereferenceNotes:v For testing and regulatingthe position of decimalpointsv For substitution into ascale modifierv To keep track of significantdigits (integers)v For scanning anddecomposing characterstringsv As indexes in substringnotationv For scanning sublistsv As a counter to test for endof sublistv For testing array limitsv To avoid defining a symbolagain if the symbolreferenced has beenpreviously definedv To avoid assembling amacro or instruction if itdoes not exist.1. The number attribute of &SYSLIST(n) and &SYSLIST(n,m) is described in “&SYSLISTSystem Variable Symbol” on page 273.Attribute reference►► attribute_notation’ ordinary_symbolvariable_symbolliteralcharacter_string►◄attribute_notation'is the attribute whose value you want, followed by a single quotation mark.Valid attribute letters are “D”, “O”, “N”, “S”, “K”, “I”, “L”, and “T”.ordinary_symbolis an ordinary symbol that represents the data that possesses the attribute. Anordinary symbol cannot be specified with the operation code attribute.variable_symbolis a variable symbol that represents the data that possesses the attribute.literalis a literal that represents the data that possesses the attribute. A literal cannotbe specified with the operation code attribute or count attribute.322 HLASM: V1R6 Language Ref
Data attributescharacter_stringis a character string that represents the operation code in the operation codeattribute.Examples:T’SYMBOLL’&VARK’&PARAMO’MVCS’=P’975.32’The assembler substitutes the value of the attribute for the attribute reference.Reference to the count (K'), defined (D'), number (N'), operation code (O'), andtype (T') attributes can be used only in conditional assembly instructions or withinmacro definitions. The length (L'), integer (I'), and scale (S') attribute references canbe in conditional assembly instructions, machine instructions, assemblerinstructions, and the operands of macro instructions.Attributes of symbols and expressionsTable 52 shows attribute references (in the columns) and types of symbols (in therows). Each intersection shows whether (“Yes”) or not (“No”) you can validlyapply the attribute reference to that symbol type, or (in the case of SET symbols) tothe value of the symbol.Table 52. Attributes and related symbolsSymbolsSpecifiedTypeT'LengthL'ScaleS'IntegerI'CountK'NumberN'DefinedD'OperationCode O'In open code:OrdinarysymbolsYesYesYesYesNoNoYesNoSystem variablesymbols withglobal scopeYesNoNoNoYesYesNoNo||||Literals inmacroinstructionoperandsYesYesYesYesNoNoYesNoIn macrodefinitions:OrdinarysymbolsYesYesYesYesNoNoYesNoSymbolicparametersYesYesYesYesYesYesYesYesSystem variablesymbols:&SYSLISTYesYesYesYesYesYesYesNoAll othersYesNoNoNoYesYesNoNoLiterals inmacro instructionoperandsYesYesYesYesNoNoYesNoChapter 9. How to write conditional assembly instructions 323
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High Level Assembler for z/OS & z/V
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Note!Before using this information
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|Open code . . . . . . . . . . . .
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Programming interface informationOr
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IBM High Level Assembler for z/OS &
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Syntax notationFormat▌A▐ ▌B
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Double-byte character set notationx
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Summary of changesxvi HLASM: V1R6 L
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Chapter 1. IntroductionA computer c
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Assembler languagev Macro instructi
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Assembler programProcessingConditio
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Coding made easierCoding made easie
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Chapter 2. Coding and structureThis
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Character setTable 4. Examples usin
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Assembler language coding conventio
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Assembler language structureThe mac
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Assembler language structureMachine
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Assembler language structureConditi
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Mnemonic tags|||||||||For example,
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Terms, literals, and expressions- T
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Terms, literals, and expressionsAss
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Terms, literals, and expressionsUsi
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Terms, literals, and expressions|||
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Terms, literals, and expressionsz/V
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Terms, literals, and expressionsTab
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Terms, literals, and expressions1.
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Terms, literals, and expressions1.
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Terms, literals, and expressions┌
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Terms, literals, and expressionsA-Y
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Chapter 3. Program structures and a
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SourcemoduleA source module is comp
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Beginning of a source modulev The S
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Beginning of a source moduleReferen
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Beginning of a source moduleNote: T
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Beginning of a source moduleClass l
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Beginning of a source modulez/VM an
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AddressingBase Address Definition:
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QualifiedDependentaddressingQualifi
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Addressingz/VM and z/OSWhen you spe
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Addressing..EX_SYM DC V(EXMOD1) Add
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AddressingSee the appendix “Objec
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Part 2. Machine and assembler instr
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Chapter 4. Machine instruction stat
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Input/output operationsThe input or
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Branching with extended mnemonic co
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Statement formatsSymbolic operation
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Operand entriesRegistersYou can spe
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Operand entriesv Explicitly—in a
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Operand entriesImmediateused by the
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Examples of coded machine instructi
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Chapter 5. Assembler instruction st
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*PROCESS statementstatement, follow
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ACONTROL instruction►►NOCOMPAT,
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ACONTROL instructionFLAG(PAGE0)inst
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ACONTROL instruction|||may be fetch
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AINSERT instruction►►sequence_s
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ALIAS instruction||||||The alias_st
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AMODE instructionCATTR instruction
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CATTR instructionRMODE(ANY)The text
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CCW and CCW0 instructionssupport 31
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CEJECT instructionIf number of line
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CNOP instructionAfter the BALR inst
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COPY instructioncopied from either
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CSECT instructionsame section name
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CXD instructionZETA: the resulting
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DC instruction10EBP(7)L2’12’the
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DC instructionTable 17. Length attr
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DC instruction4. Double-byte data i
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DC instructionTable 19. Type codes
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DC instructionYou may omit the modi
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DC instructionfirst constant to be
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DC instructionTable 21. Specifying
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DC instruction—Character constant
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DC instruction—Character constant
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DC instruction—Graphic constantTa
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DC instruction—Fixed-point consta
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DC instruction—Fixed-point consta
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DC instruction—Decimal constantsD
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DC instruction—Address constants|
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DC instruction—Address constantsT
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DC instruction—Offset constantIn
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DC instruction—Hexadecimal floati
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DC instruction—Decimal floating-p
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Syntax of binary, decimal, and hexa
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DC instruction—Binary floating-po
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DROP instructionLabeledDependentIf
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DS instructionv An ordinary symbolv
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DS instructionthe data that follows
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DSECT instructionTo effect referenc
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DXD instructionnominal_valueis the
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END instructionNotes:1. If the END
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EQU instruction||||to the symbol in
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EQU instruction|FPR Register - Floa
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EXITCTL instructionSee the section
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ISEQ instruction►►sequence_symb
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LOCTR instructionA LOCTR name may b
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LTORG instructionAddressingDuplicat
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MNOTE instructionNote: The maximum
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OPSYN instruction||||||v An operati
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ORG instruction||||||||If symbol de
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ORG instructionThat is, the ORG ins
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PRINT instructionPRINT instructionT
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PRINT instructionexceeded the macro
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PUNCH instructionv A pair of single
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REPRO instruction||Notes:1. The ide
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RSECT instructionThe beginning of a
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TITLE instructionv Provides heading
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TITLE instructionIf the TITLE state
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USING instructioninstructions suppo
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USING instructionby means of anothe
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USING instructionLabeled USING inst
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USING instructionDomain of a labele
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USING instructionIf the dependent U
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XATTR instructionXATTR instruction
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XATTR instructionSCOPE(MODULE), abb
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Name entry . . . . . . . . . . . .
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Macro definitionA macro definition
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Macro instructionThe macro instruct
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Where to define a macro in a source
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Prototype statement|||||specified o
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Model statementsEach field or subfi
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Model statementsTable 37. Rules for
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Model statements||v Variable symbol
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Symbolic parametersPositionalKeywor
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Other conditional assembly instruct
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AREAD instruction||If no operand is
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MEXIT instructionThe MEXIT instruct
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System variable symbols1 macro2 get
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&SYSADATA_MEMBER System Variable Sy
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&SYSDATC System Variable SymbolYYYY
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&SYSECT System Variable Symbolv Sta
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&SYSIN_MEMBER System Variable Symbo
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&SYSLIB_DSN System Variable SymbolS
Page 290 and 291: &SYSLIN_DSN System Variable SymbolE
Page 292 and 293: &SYSLIST System Variable Symbolposi
Page 294 and 295: &SYSLOC System Variable Symbolinstr
Page 296 and 297: &SYSNDX System Variable Symbol1 MAC
Page 298 and 299: &SYSNDX System Variable SymbolState
Page 300 and 301: &SYSOPT_RENT System Variable Symbol
Page 302 and 303: &SYSPRINT_DSN System Variable Symbo
Page 304 and 305: &SYSPUNCH_DSN System Variable Symbo
Page 306 and 307: &SYSSEQF System Variable Symbol1. I
Page 308 and 309: &SYSTEM_ID System Variable SymbolNo
Page 310 and 311: &SYSTERM_VOLUME System Variable Sym
Page 312 and 313: &SYSVER System Variable Symbol294 H
Page 314 and 315: Macro instruction format|name_entry
Page 316 and 317: Macro instruction formatOperandYou
Page 318 and 319: Macro instruction formatAny keyword
Page 320 and 321: Macro instruction formatparameters
Page 322 and 323: Sublists in operandsTable 48. Relat
Page 324 and 325: Values in operandsUnquotedSpecial2.
Page 326 and 327: Values in operands’SPACES ALLOWED
Page 328 and 329: Levels of macro call nestingLevels
Page 330 and 331: Levels of macro call nestingCOMPAT(
Page 332 and 333: Levels of macro call nesting&SYSSEQ
Page 334 and 335: SET symbolsSET symbolsSET symbols a
Page 336 and 337: SET symbolsTable 50. Features of SE
Page 338 and 339: SET symbolspreceding 999999 element
Page 342 and 343: Data attributesThe values of attrib
Page 344 and 345: Data attributesV R-, V-type address
Page 346 and 347: Data attributes|||||||||Notes:1. Or
Page 348 and 349: Data attributesv If the first opera
Page 350 and 351: Data attributesCount attribute (K')
Page 352 and 353: Data attributes||||||defined attrib
Page 354 and 355: Sequence symbolsparameter wherever
Page 356 and 357: LookaheadSequencelater defined by O
Page 358 and 359: GBLA, GBLB, and GBLC instructionsGB
Page 360 and 361: LCLA, LCLB, and LCLC instructions,
Page 362 and 363: Assigning values to SET symbolsLogi
Page 364 and 365: Assigning values to SET symbolsTabl
Page 366 and 367: SETA instructionTable 58. Variable
Page 368 and 369: SETA instructionB2A(’’) has val
Page 370 and 371: SETA instruction|||||||||||||||||||
Page 372 and 373: SETA instructionAfter the following
Page 374 and 375: SETA instruction10. An arithmetic e
Page 376 and 377: SETA instructionarithmetic value
Page 378 and 379: SETB instructionv A logical express
Page 380 and 381: SETB instructionOR Format: Logical-
Page 382 and 383: SETC instructionSETCinstructionThe
Page 384 and 385: SETC instruction|LCLC &C1,&C2LCLC &
Page 386 and 387: Substring notationv When e2 has a v
Page 388 and 389: Substring notation||||ExamplesA2D(0
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Substring notationC2X Format: Funct
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Substring notationSuppose the SETC
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Substring notationX2C(’’) has v
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Substring notationFor example, eith
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Substring notationStatement 1 assig
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SETAF instruction►► variable_sy
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AIF instructionsequence_symbolis a
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AIF instructionAIFB—synonym of th
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ACTR instruction►►sequence_symb
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MHELP optionsparameters are dumped
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Assembler instructions and statemen
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Summary of constantsTable 65. Summa
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Macro and conditional assembly lang
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Standard character set code tableHe
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Standard character set code tableHe
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NoticesPURPOSE. Some states do not
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z/VM: CP Planning and Administratio
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ALIAS instruction 108maximum operan
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comment statements (continued)ordin
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GG-type graphic constant 144GBLA in
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macro instructions (continued)opera
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eference constant (R) 154reference
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UUHEADPRINT instruction 206unary op
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