HLASM: V1R6 Language Ref

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Substring notationFor example, either of the following statements may be used to assign thecharacter value ABCDEF to the SETC symbol &BETA.&BETA SETC ’ABCDEF’&BETA SETC ’ABC’.’DEF’Concatenation of strings containing double-byte data: If the assembler is invoked withthe DBCS option, then the following additional considerations apply:v When a variable symbol adjoins double-byte data, the SO delimiting thedouble-byte data is not a valid delimiter of the variable symbol. The variablesymbol must be terminated by a period.v The assembler checks for SI and SO at concatenation points. If the byte to theleft of the join is SI and the byte to the right of the join is SO, then the SI/SOpair are considered redundant and are removed.v To create redundant SI/SO pairs at concatenation points, use the substringnotation and SETC expressions to create additional SI and SO characters. Bycontrolling the order of concatenation, you can leave a redundant SI/SO pair ata concatenation point.Instead of substring notation, you can use the BYTE function to create additionalSI and SO characters:&SO SETC (BYTE 14)&SI SETC (BYTE 15)Examples:&DBDA SETC ’’&SO SETC BYTE(X'0E')&SI SETC BYTE(X'0F')&DBCS1A SETC ’&DBDA.’&DBCS1E SETC ’&DBDA’&DBCS2 SETC ’&DBDA’.’’&DBCS2A SETC ’&DBDA’.’’.’&DBDA’&DBCS3 SETC ’&DBDA’.’&SI’.’&SO’.’’&DBCS3P SETC ’&DBDA’.’&SI’&DBCS3Q SETC ’&SO’.’’&DBCS3R SETC ’&DBCS3P’.’&DBCS3Q’These examples use the BYTE function to create variables &SO and &SI, whichhave the values of SO and SI, respectively. The variable &DBCS1A is assigned thevalue with the SI/SO pair at the join removed. The assignment to variable&DBCS1E fails with error ASMA035E Invalid delimiter, because the symbol &DBDA isterminated by SO and not by a period. The variable &DBCS2 is assigned the value. The variable &DBCS2A is assigned the value . As with &DBCS1A,redundant SI/SO pairs are removed at the joins. The variable &DBCS3 is assignedthe value . Although SI and SO have been added at the join, theconcatenation operation removes two SI and two SO characters, since redundantSI/SO pairs are found at the second and third concatenations. However, by usingintermediate variables &DBCS3P and &DBCS3Q to change the order of concatenation,the string can be assigned to variable &DBCS3R. Note that substituting thevariable symbol &DBCS3R in the nominal value of a G-type constant results inremoval of the SI/SO pair at the join.Using SETC symbolsThe character value assigned to a SETC symbol is substituted for the SETC symbolwhen it is used in the name, operation, or operand field of a statement.For example, consider the following macro definition, macro instruction, andgenerated statements:378 HLASM: V1R6 Language Ref
Substring notationMACRO&NAME MOVE &TO,&FROMLCLC&PREFIX&PREFIX SETC ’FIELD’ Statement 1&NAME ST 2,SAVEAREAL 2,&PREFIX&FROM Statement 2ST 2,&PREFIX&TO Statement 3L2,SAVEAREAMEND-------------------------------------------------------------------HERE MOVE A,B-------------------------------------------------------------------+HERE ST 2,SAVEAREA+ L 2,FIELDB+ ST 2,FIELDA+ L 2,SAVEAREAStatement 1 assigns the character value FIELD to the SETC symbol &PREFIX. Instatements 2 and 3, &PREFIX is replaced by FIELD.The following example shows how the value assigned to a SETC symbol may bechanged in a macro definition.MACRO&NAME MOVE &TO,&FROMLCLC&PREFIX&PREFIX SETC ’FIELD’ Statement 1&NAME ST 2,SAVEAREAL 2,&PREFIX&FROM Statement 2&PREFIX SETC ’AREA’ Statement 3ST 2,&PREFIX&TO Statement 4L2,SAVEAREAMEND-------------------------------------------------------------------HERE MOVE A,B-------------------------------------------------------------------+HERE ST 2,SAVEAREA+ L 2,FIELDB+ ST 2,AREAA+ L 2,SAVEAREAStatement 1 assigns the character value FIELD to the SETC symbol &PREFIX.Therefore, &PREFIX is replaced by FIELD in statement 2. Statement 3 assigns thecharacter value AREA to &PREFIX. Therefore, &PREFIX is replaced by AREA, instead ofFIELD, in statement 4.The following example uses the substring notation in the operand field of a SETCinstruction.MACRO&NAME MOVE &TO,&FROMLCLC&PREFIX&PREFIX SETC ’&TO’(1,5) Statement 1&NAME ST 2,SAVEAREAL 2,&PREFIX&FROM Statement 2ST2,&TOL2,SAVEAREAMEND-------------------------------------------------------------------HERE MOVE FIELDA,B-------------------------------------------------------------------+HERE ST 2,SAVEAREA+ L 2,FIELDB+ ST 2,FIELDA+ L 2,SAVEAREAChapter 9. How to write conditional assembly instructions 379
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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
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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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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
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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
Page 390 and 391: Substring notationC2X Format: Funct
Page 392 and 393: Substring notationSuppose the SETC
Page 394 and 395: Substring notationX2C(’’) has v
Page 398 and 399: Substring notationStatement 1 assig
Page 400 and 401: SETAF instruction►► variable_sy
Page 402 and 403: AIF instructionsequence_symbolis a
Page 404 and 405: AIF instructionAIFB—synonym of th
Page 406 and 407: ACTR instruction►►sequence_symb
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Page 410 and 411: MHELP optionsparameters are dumped
Page 416 and 417: Assembler instructions and statemen
Page 422 and 423: Summary of constantsTable 65. Summa
Page 424 and 425: Macro and conditional assembly lang
Page 436 and 437: Standard character set code tableHe
Page 438 and 439: Standard character set code tableHe
Page 440 and 441: NoticesPURPOSE. Some states do not
Page 442 and 443: z/VM: CP Planning and Administratio
Page 444 and 445: 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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