HLASM: V1R6 Language Ref

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&SYSSEQF System Variable Symbol1. If no ICTL instruction has been specified and sequence checking is not active,the contents of columns 73 to 80 inclusive of the source statement are assignedto &SYSSEQF.2. If an ICTL instruction has been specified, but sequence checking is not active,the contents of the columns of the source statement to the right of thecontinuation-indicator column are assigned to &SYSSEQF. If the end column orthe continuation-indicator column is 80, &SYSSEQF is assigned a null characterstring.3. If an ISEQ instruction with operands has been specified to start sequencechecking, the contents of columns specified in the ISEQ instruction operand areassigned to &SYSSEQF.4. If an ISEQ instruction without an operand has been specified to end sequencechecking, steps (1) and (2) are used to determine the value assigned to&SYSSEQF.Notes:1. The value of the type attribute of &SYSSEQF (T'&SYSSEQF) is U, unless&SYSSEQF is assigned a null character string, in which case the value of thetype attribute is O.2. The value of the count attribute of &SYSSEQF (K'&SYSSEQF) is equal to thenumber of characters assigned as a value to &SYSSEQF. If &SYSSEQF isassigned a null character string, the value of the count attribute is 0.3. Throughout the use of a macro definition, the value of &SYSSEQF is considereda constant.&SYSSTEP System Variable SymbolUse &SYSSTEP to obtain the stepname of the job step used to assemble yoursource module. &SYSSTEP has a global scope.On CMS and z/VSE the value of &SYSSTEP is always (NOSTEP).Notes:1. The value of the type attribute of &SYSSTEP (T'&SYSSTEP) is always U.2. The value of the count attribute (K'&SYSSTEP) is the number of charactersassigned.&SYSSTMT System Variable SymbolUse &SYSSTMT to obtain the next statement number that is assigned to astatement by the assembler. &SYSSTMT has a global scope.The value assigned to &SYSSTMT is an 8-character string, padded on the left withleading zero (X'F0') characters. The following example shows the value assigned to&SYSSTMT. It assumes that the DC statement is in open code, and is the 23rdstatement in the source module.23 DC C’&SYSSTMT’+ DC C’00000024’Notes:1. The value of the type attribute of &SYSSTMT (T'&SYSSTMT) is always N.2. The value of the count attribute of &SYSSTMT (K'&SYSSTMT) is always 8.288 HLASM: V1R6 Language Ref
&SYSSTYP System Variable Symbol&SYSSTYP System Variable SymbolUse &SYSSTYP in a macro definition to generate the type of the current controlsection. The current control section is the control section in which the macroinstruction that calls the definition appears.The local-scope system variable symbol &SYSSTYP is assigned a read-only valueeach time a macro definition is called.The value assigned is the symbol that represents the type of the current controlsection in effect when the macro is called. A control section that has been initiatedor continued by substitution does not affect the value of &SYSSTYP for theexpansion of the current macro. However, it does affect &SYSSTYP for asubsequent macro call. Nested macros cause the assembler to assign a value to&SYSSTYP that depends on the control section in force inside the calling macrowhen the inner macro is called.The control section whose type is assigned to &SYSSTYP can be defined by aprogram sectioning statement. This can be a START, CSECT, RSECT, DSECT, orCOM statement, or, for the first control section, any instruction described in “Firstsection” on page 53. Depending upon the instruction used to initiate the currentcontrol section, the value assigned to &SYSSTYP is either CSECT, RSECT, DSECT,or COM. If the current control section is an executable control section initiated byother than a CSECT or RSECT instruction, the value assigned to &SYSSTYP isCSECT.If a control section has not been initiated, &SYSSTYP is assigned a null characterstring.Notes:1. The value of the type attribute of &SYSSTYP (T'&SYSSTYP) is U, unless&SYSSTYP is assigned a null character string, in which case the value of thetype attribute is O.2. The value of the count attribute of &SYSSTYP (K'&SYSSTYP) is equal to thenumber of characters assigned as a value to &SYSSTYP. If &SYSSTYP isassigned a null character string, the value of the count attribute is 0.3. Throughout the use of a macro definition, the value of &SYSSTYP is considereda constant.&SYSTEM_ID System Variable SymbolUse &SYSTEM_ID to obtain the name and release of the operating system underwhich your source module is being assembled. &SYSTEM_ID has a global scope.For example, on z/OS, &SYSTEM_ID might contain one of the following:z/OS 01.04.00z/OS 01.05.00... etc.on CMS, &SYSTEM_ID might contain one of the following:CMS 18CMS 19... etc.on z/VSE, &SYSTEM_ID might contain one of the following:VSE/AF 6.6.0... etc.Chapter 7. How to specify macro definitions 289
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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
Page 256 and 257: Macro instructionThe macro instruct
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Page 260 and 261: Where to define a macro in a source
Page 262 and 263: Prototype statement|||||specified o
Page 264 and 265: Model statementsEach field or subfi
Page 266 and 267: Model statementsTable 37. Rules for
Page 268 and 269: Model statements||v Variable symbol
Page 270 and 271: Symbolic parametersPositionalKeywor
Page 272 and 273: Other conditional assembly instruct
Page 274 and 275: AREAD instruction||If no operand is
Page 276 and 277: MEXIT instructionThe MEXIT instruct
Page 278 and 279: System variable symbols1 macro2 get
Page 280 and 281: &SYSADATA_MEMBER System Variable Sy
Page 282 and 283: &SYSDATC System Variable SymbolYYYY
Page 284 and 285: &SYSECT System Variable Symbolv Sta
Page 286 and 287: &SYSIN_MEMBER System Variable Symbo
Page 288 and 289: &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 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 340 and 341: Data attributesTable 51. Data attri
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
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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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