HLASM: V1R6 Language Ref

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|Open code . . . . . . . . . . . . . . 338Conditional assembly instructions . . . . . . 339Declaring SET symbols . . . . . . . . . . 339GBLA, GBLB, and GBLC instructions . . . . 340LCLA, LCLB, and LCLC instructions . . . . 341Assigning values to SET symbols . . . . . . . 343Introducing Built-In Functions . . . . . . . 343SETA instruction . . . . . . . . . . . 346SETB instruction . . . . . . . . . . . 359SETC instruction . . . . . . . . . . . 364Extended SET statements . . . . . . . . 381SETAF instruction . . . . . . . . . . . 381SETCF instruction . . . . . . . . . . . 382Branching . . . . . . . . . . . . . . 383AIF instruction . . . . . . . . . . . . 383AGO instruction . . . . . . . . . . . 386ACTR instruction . . . . . . . . . . . 387ANOP instruction . . . . . . . . . . . 388Chapter 10. MHELP instruction . . . . 391MHELP options . . . . . . . . . . . . 391MHELP operand mapping . . . . . . . . . 392Combining options . . . . . . . . . . . 393Part 4. Appendixes . . . . . . . . 395Appendix A. Assembler instructions 397Appendix B. Summary of constants 403Appendix C. Macro and conditionalassembly language summary . . . . 405Appendix D. Standard character setcode table . . . . . . . . . . . . . 417Notices . . . . . . . . . . . . . . 421Trademarks . . . . . . . . . . . . . . 422Bibliography . . . . . . . . . . . . 423High Level Assembler Publications . . . . . . 423Toolkit Feature Publications . . . . . . . . 423Related Publications (Architecture) . . . . . . 423Related Publications for z/OS . . . . . . . . 423Related Publications for z/VM . . . . . . . 423Related Publications for z/VSE . . . . . . . 424Index . . . . . . . . . . . . . . . 425vi HLASM: V1R6 Language Ref
About this manualThis manual describes the syntax of assembler language statements, and providesinformation about writing source programs that are to be assembled by IBM HighLevel Assembler for z/OS & z/VM & z/VSE, Licensed Program 5696-234,hereafter referred to as High Level Assembler, or simply the assembler. It is meantto be used in conjunction with HLASM Programmer’s Guide.Detailed definitions of machine instructions are not included in this manual. See“Bibliography” on page 423 for a list of manuals that provide this information.Throughout this book, we use these indicators to identify platform-specificinformation:v Prefix the text with platform-specific text (for example, “Under CMS...”)v Add parenthetical qualifications (for example, “(CMS)”)v Marking lines above and below the text. Here are some of the marking lines weuse:z/OSInforms you of information specific to z/OS ® .End of z/OSz/VMInforms you of information specific to z/VM ® .End of z/VMz/VSEInforms you of information specific to z/VSE .End of z/VSEWho should use this manualCMS is used in this manual to refer to Conversational Monitor System on z/VM.HLASM Language Reference is for application programmers coding in the HighLevel Assembler language. It is not intended to be used for tutorial purposes, butis for reference only. If you are interested in learning more about assemblers, mostlibraries have tutorial books on the subject. It assumes you are familiar with thefunctional details of the Enterprise Systems Architecture, and the role ofmachine-language instructions in program execution.Programming interface informationThis manual is intended to help the customer create application programs. Thismanual documents General-Use Programming Interface and Associated GuidanceInformation provided by IBM High Level Assembler for z/OS & z/VM & z/VSE.© Copyright IBM Corp. 1982, 2008 vii
Page 1: High Level Assembler for z/OS & z/V
Page 4 and 5: Note!Before using this information
Page 10 and 11: Programming interface informationOr
Page 12 and 13: IBM High Level Assembler for z/OS &
Page 14 and 15: Syntax notationFormat▌A▐ ▌B
Page 16 and 17: Double-byte character set notationx
Page 18: Summary of changesxvi HLASM: V1R6 L
Page 21 and 22: Chapter 1. IntroductionA computer c
Page 23 and 24: Assembler languagev Macro instructi
Page 25 and 26: Assembler programProcessingConditio
Page 27 and 28: Coding made easierCoding made easie
Page 29 and 30: Chapter 2. Coding and structureThis
Page 31 and 32: Character setTable 4. Examples usin
Page 33 and 34: Assembler language coding conventio
Page 39 and 40: Assembler language structureThe mac
Page 41 and 42: Assembler language structureMachine
Page 43 and 44: Assembler language structureConditi
Page 45 and 46: Mnemonic tags|||||||||For example,
Page 47 and 48: Terms, literals, and expressions- T
Page 49 and 50: Terms, literals, and expressionsAss
Page 51 and 52: Terms, literals, and expressionsUsi
Page 53 and 54: Terms, literals, and expressions|||
Page 55 and 56: 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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232 HLASM: V1R6 Language Ref
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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
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&SYSLIN_DSN System Variable SymbolE
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&SYSLIST System Variable Symbolposi
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&SYSLOC System Variable Symbolinstr
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&SYSNDX System Variable Symbol1 MAC
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&SYSNDX System Variable SymbolState
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&SYSOPT_RENT System Variable Symbol
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&SYSPRINT_DSN System Variable Symbo
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&SYSPUNCH_DSN System Variable Symbo
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&SYSSEQF System Variable Symbol1. I
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&SYSTEM_ID System Variable SymbolNo
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&SYSTERM_VOLUME System Variable Sym
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&SYSVER System Variable Symbol294 H
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Macro instruction format|name_entry
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Macro instruction formatOperandYou
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Macro instruction formatAny keyword
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Macro instruction formatparameters
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Sublists in operandsTable 48. Relat
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Values in operandsUnquotedSpecial2.
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Values in operands’SPACES ALLOWED
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Levels of macro call nestingLevels
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Levels of macro call nestingCOMPAT(
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Levels of macro call nesting&SYSSEQ
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SET symbolsSET symbolsSET symbols a
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SET symbolsTable 50. Features of SE
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SET symbolspreceding 999999 element
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Data attributesTable 51. Data attri
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Data attributesThe values of attrib
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Data attributesV R-, V-type address
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Data attributes|||||||||Notes:1. Or
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Data attributesv If the first opera
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Data attributesCount attribute (K')
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Data attributes||||||defined attrib
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Sequence symbolsparameter wherever
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LookaheadSequencelater defined by O
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GBLA, GBLB, and GBLC instructionsGB
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LCLA, LCLB, and LCLC instructions,
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Assigning values to SET symbolsLogi
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Assigning values to SET symbolsTabl
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SETA instructionTable 58. Variable
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SETA instructionB2A(’’) has val
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SETA instruction|||||||||||||||||||
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SETA instructionAfter the following
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SETA instruction10. An arithmetic e
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SETA instructionarithmetic value
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SETB instructionv A logical express
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SETB instructionOR Format: Logical-
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SETC instructionSETCinstructionThe
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SETC instruction|LCLC &C1,&C2LCLC &
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Substring notationv When e2 has a v
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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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