HLASM: V1R6 Language Ref

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&SYSECT System Variable Symbolv Statement 8 is the last program sectioning statement processed before statement9 is processed. Therefore, &SYSECT is assigned the value MAINPROG for macroinstruction OUTER1 in statement 9. MAINPROG is substituted for &SYSECT when itappears in statement 6.v Statement 3 is the program sectioning statement processed before statement 4 isprocessed. Therefore, &SYSECT is assigned the value CSOUT1 for macroinstruction INNER in statement 4. CSOUT1 is substituted for &SYSECT when itappears in statement 2.v Statement 1 is used to generate a CSECT statement for statement 4. This is thelast program sectioning statement that appears before statement 5. Therefore,&SYSECT is assigned the value INA for macro instruction INNER in statement 5.INA is substituted for &SYSECT when it appears in statement 2.v Statement 1 is used to generate a CSECT statement for statement 5. This is thelast program sectioning statement that appears before statement 10. Therefore,&SYSECT is assigned the value INB for macro instruction OUTER2 in statement 10.INB is substituted for &SYSECT when it appears in statement 7.&SYSIN_DSN System Variable SymbolUse &SYSIN_DSN in a macro definition to obtain the name of the data set fromwhich the assembler is reading the source module.The local system variable symbol &SYSIN_DSN is assigned a read-only value eachtime a macro definition is called.z/OSIf concatenated data sets are used to provide the source module, &SYSIN_DSN hasa value equal to the data set name of the data set that contains the open codesource line of the macro call statement, irrespective of the nesting depth of themacro line containing the &SYSIN_DSN reference.When the assembler runs on the z/OS operating systems, the value of thecharacter string assigned to &SYSIN_DSN is always the value stored in the JFCBfor SYSIN.End of z/OSz/VMWhen the assembler runs on the CMS component of the z/VM operating systems,the value of the character string assigned to &SYSIN_DSN is determined asfollows:Table 39. Contents of &SYSIN_DSN on CMSSYSIN Allocated To: Contents of &SYSIN_DSN:CMS file The 8-character filename, the 8-characterfiletype, and the 2-character filemode of thefile, each separated by a spaceReaderTerminalREADERTERMINALLabeled tape file The data set name of the tape fileUnlabeled tape file TAPn, where n is a value from 0 to 9, or A toF.266 HLASM: V1R6 Language Ref
&SYSIN_DSN System Variable SymbolEnd of z/VMz/VSEWhen the assembler runs on the z/VSE operating system, the value of thecharacter string assigned to &SYSIN_DSN is determined as follows:Table 40. Contents of &SYSIN_DSN on z/VSESYSIPT Assigned To: Contents of &SYSIN_DSN:Job stream (SYSIPT) SYSIPTDisk The file-idLabeled tape file The file-id of the tape fileUnlabeled tape file SYSIPTExamples:End of z/VSEOn z/OS, &SYSIN_DSN might be assigned a value such as:IBMAPC.ASSEMBLE.SOURCEOn CMS, &SYSIN_DSN might be assigned a value such as:SAMPLE ASSEMBLE A1Notes:1. If the SOURCE user exit provides the data set information then the value in&SYSIN_DSN is the value extracted from the Exit-Specific Information blockdescribed in the section “Exit-Specific Information Block” in the HLASMProgrammer’s Guide.2. The value of the type attribute of &SYSIN_DSN (T'&SYSIN_DSN) is always U.3. The value of the count attribute of &SYSIN_DSN (K'&SYSIN_DSN) is equal tothe number of characters assigned as a value to &SYSIN_DSN. In the CMSexample above, the count attribute of &SYSIN_DSN is 20.4. Throughout the use of a macro definition, the value of &SYSIN_DSN isconsidered a constant.&SYSIN_MEMBER System Variable Symbolz/VSEThe value of &SYSIN_MEMBER is always null.The value of the type attribute is O, and the value of the count attribute is 0.End of z/VSEz/VM and z/OSYou can use &SYSIN_MEMBER in a macro definition to obtain the name of thedata set member from which the assembler is reading the source module. IfChapter 7. How to specify macro definitions 267
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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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Page 236 and 237: USING instructioninstructions suppo
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Page 242 and 243: USING instructionDomain of a labele
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Page 246 and 247: XATTR instructionXATTR instruction
Page 248 and 249: XATTR instructionSCOPE(MODULE), abb
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Page 252 and 253: Name entry . . . . . . . . . . . .
Page 254 and 255: 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 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 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
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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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390 HLASM: V1R6 Language Ref
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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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