HLASM: V1R6 Language Ref

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Model statements||v Variable symbols can be used alone or as part of a concatenated string togenerate operation codes for:– Any machine instruction– Any assembler instruction, except COPY, ICTL, ISEQ, REPRO, and MEXITThe generated operation code must not be an operation code for theseinstructions, either directly, or via copies created by use of OPSYN:– A conditional assembly instruction, such as LCLx, GBLx, SETx, AIF, and AGO– The following assembler instructions: COPY, ICTL, ISEQ, MACRO, MEND,MEXIT, and REPROv Double-byte data is not valid in the operation field.Operand fieldThe entries allowed in the operand field of a model statement, before generation,are:v Spaces (if valid)v An ordinary symbolv A character string, combining alphanumeric and special characters (but notvariable symbols)v A variable symbolv A combination of variable symbols and other character strings concatenatedtogetherv If the DBCS assembler option is specified, character strings may containdouble-byte data, provided the character strings are enclosed by apostrophes.The allowable results of generation are spaces (if valid) and a character string thatrepresents a valid assembler, machine instruction, or macro instruction operandfield.Variable symbols: Variable symbols must not be used in the operand field of aICTL, or ISEQ instruction. A variable symbol must not be used in the operand fieldof a COPY instruction that is inside a macro definition.Remarks fieldThe remarks field of a model statement can contain any combination of characters.No substitution is done for variable symbols appearing in the remarks field.Using spaces: One or more spaces must be used in a model statement to separatethe name, operation, operand, and remarks fields from each other. Spaces cannotbe generated between fields in order to create a complete assembler languagestatement. The exception to this rule is that a combined operand-remarks field canbe generated with one or more spaces to separate the two fields. Note, however,that if the generated operand field is part of a macro instruction, the entire string(including spaces) is passed as an operand.SymbolicparametersSymbolic parameters let you receive values into the body of a macro definitionfrom the calling macro instruction. You declare these parameters in the macroprototype statement. They can serve as points of substitution in the body of themacro definition and are replaced by the values assigned to them by the callingmacro instruction.250 HLASM: V1R6 Language Ref
Symbolic parametersBy using symbolic parameters with meaningful names, you can indicate thepurpose for which the parameters (or substituted values) are used.Symbolic parameters must be valid variable symbols. A symbolic parameterconsists of an ampersand followed by an alphabetic character and from 0 to 61alphanumeric characters.The following are valid symbolic parameters:&READER&A23456&X4F2&LOOP2&N&$4The following are not valid symbolic parameters:CARDAREA first character is not an ampersand&256B first character after ampersand is not alphabetic&BCD%34 contains a special character other than initial ampersand&IN AREA contains a special character [space] other than initial ampersandSymbolic parameters have a local scope; that is, the name and value they areassigned only applies to the macro definition in which they have been declared.The value of the parameter remains constant throughout the processing of thecontaining macro definition during each call of that definition.Notes:1. Symbolic parameters must not have multiple definitions or be identical to anyother variable symbols within the given local scope. This applies to the systemvariable symbols described in “System variable symbols” on page 259, and tolocal-scope and global-scope SET symbols described in “SET symbols” on page316.2. Symbolic parameters should not begin with &SYS because these characters areused for system variable symbols provided with High Level Assembler.The two kinds of symbolic parameters are:v Positional parametersv Keyword parametersEach positional or keyword parameter used in the body of a macro definition mustbe declared in the prototype statement.The following is an example of a macro definition with symbolic parameters.MACROHeader&NAME MOVE &TO,&FROM Prototype&NAME ST 2,SAVE ModelL 2,&FROM ModelST 2,&TO ModelL 2,SAVE ModelMENDTrailerIn the following macro instruction that calls the above macro, the characters HERE,FIELDA, and FIELDB of the MOVE macro instruction correspond to the symbolicparameters &NAME, &TO, and &FROM, respectively, of the MOVE prototype statement.HERE MOVE FIELDA,FIELDBIf the preceding macro instruction were used in a source program, the followingassembler language statements would be generated:Chapter 7. How to specify macro definitions 251
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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
Page 218 and 219: ORG instruction||||||||If symbol de
Page 220 and 221: ORG instructionThat is, the ORG ins
Page 222 and 223: PRINT instructionPRINT instructionT
Page 224 and 225: PRINT instructionexceeded the macro
Page 226 and 227: PUNCH instructionv A pair of single
Page 228 and 229: REPRO instruction||Notes:1. The ide
Page 230 and 231: RSECT instructionThe beginning of a
Page 232 and 233: TITLE instructionv Provides heading
Page 234 and 235: TITLE instructionIf the TITLE state
Page 236 and 237: USING instructioninstructions suppo
Page 238 and 239: USING instructionby means of anothe
Page 240 and 241: USING instructionLabeled USING inst
Page 242 and 243: USING instructionDomain of a labele
Page 244 and 245: USING instructionIf the dependent U
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 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 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
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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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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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