HLASM Language Reference

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Model Statements ▌5▐ ▌6▐ ▌7▐ ▌8▐ An ordinary character string precedes a variable symbol. A special character, except a left parenthesis or a period, is to follow a variable symbol. A variable symbol follows another variable symbol. A variable symbol is used with a subscript. The concatenation character must not be used between a variable symbol and its subscript; otherwise, the characters are considered a concatenated string and not a subscripted variable symbol. Figure 64, in which the numbers correspond to the numbers in the above list, gives the rules for concatenating variable symbols to ordinary character strings. Figure 64. Rules for Concatenation Concatenated String &FIELD.A ▌1▐ &FIELDA Variable Symbol &FIELD &FIELDA Values to be Substituted AREA SUM Value AREAA SUM Generated Result &DISP.(&BASE) ▲ ▲ ▌2▐ ▌6▐ &DISP &BASE 1 1 1(1) DC D'&INT..&FRACT' ▲ ▌3▐ &INT &FRACT 99 88 DC D'99.88' ▲ ▌4▐ DC D'&INT&FRACT' ▲ ▌7▐ DC D'9988' FIELD&A ▌5▐ &A A FIELDA &A+&B3-D ▲ ▲ └──┴── ▌6▐ &A &B A B A+B3-D &SYM(&SUBSCR) ▲ ▌8▐ &SUBSCR &SYM(1) 1 ENTRY ENTRY Notes: 1. The concatenation character is not generated. 250 HLASM V1R5 Language Reference
Model Statements Concatenation of Fields Containing Double-Byte Data: If the DBCS assembler option is specified, then the following additional rules apply: Because ampersand is not recognized in double-byte data, variable symbols must not be present in double-byte data. The concatenation character is mandatory when double-byte data is to follow a variable symbol. The assembler checks for redundant SI and SO at concatenation points. If the byte to the left of the join is SI and the byte to the right of the join is SO, then the SI/SO pair is considered redundant and is removed. Note: The rules for redundant SI and SO are different for variable substition and listing display, which are described at “Listing of Generated Fields Containing Double-Byte Data” on page 249. The following example shows these rules: &SYMBOL SETC '' DBCS DC C'&SYMBOL.' The SI/SO pairs between double-byte characters Db and Dc, and Dd and .&, are removed. The variable symbol &SYMBOL is recognized between the double-byte strings but not in the double-byte strings. The result after concatenation is: DBCS DC C'' Rules for Model Statement Fields The fields that can be specified in model statements are the same fields that can be specified in an ordinary assembler language statement. They are the name, operation, operand, and remarks fields. You can also specify a continuation-indicator field, an identification-sequence field, and, in source macro definitions, a field before the begin column if the correct ICTL instruction has been specified. Character strings in the last three fields (in the standard format only, columns 72 through 80) are generated exactly as they appear in the model statement, and no values are substituted for variable symbols. Model statements must have an entry in the operation field, and, in most cases, an entry in the operand field in order to generate valid assembler language instructions. Name Field The entries allowed in the name field of a model statement, before generation, are: Space An ordinary symbol A sequence symbol A variable symbol Any combination of variable symbols, or system variable symbols such as &SYSNDX, and other character strings concatenated together The generated result must be spaces (if valid) or a character string that represents a valid assembler or machine instruction name field. Double-byte data is not valid in an assembler or machine instruction name field and must not be generated. Variable symbols must not be used to generate comment statement indicators ( or .). Chapter 7. How to Specify Macro Definitions 251
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High Level Assembler for MVS & VM &
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Note! Before using this information
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Contents Source Module . . . . . .
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Contents Ordinary USING Instruction
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Contents Sublists in Operands . . .
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About this Manual This manual descr
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IBM High Level Assembler for MVS &
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| The Internet. You can access IBM
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▌C▐ The item referred to by ▌
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Miscellany The ASCII translation t
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Part 1. Assembler Language—Struct
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Language Compatibility Language Com
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Assembler Program Assembler Program
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Relationship of Assembler to Operat
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Coding Made Easier Linkage between
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Character Set Compatibility with Ea
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Assembler Language Coding Conventio
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Assembler Language Structure Condit
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Assembler Language Structure Machin
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Assembler Language Structure Condit
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Terms, Literals, and Expressions Te
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Terms, Literals, and Expressions -
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Terms, Literals, and Expressions As
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Terms, Literals, and Expressions Se
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Terms, Literals, and Expressions Fo
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Terms, Literals, and Expressions I
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Terms, Literals, and Expressions Th
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Terms, Literals, and Expressions 1.
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Terms, Literals, and Expressions
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Terms, Literals, and Expressions
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Terms, Literals, and Expressions Th
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| Chapter 3. Program Structures and
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Source Module A source module is co
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The CSECT instruction can be used a
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| in linker control statements for
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This is not only convenient, but it
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| SECT_A CSECT , Define section SEC
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| For executable sections, the loca
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Addressing | The System/390® and z
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Addressing | Parts must always be r
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Addressing Literal Pools ALPHA LR 3
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Addressing If the symbol is the nam
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Addressing External Symbol Dictiona
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Addressing 74 HLASM V1R5 Language R
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Part 2. Machine and Assembler Instr
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General Instructions Chapter 4. Mac
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Input/Output Operations For further
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Branching with Extended Mnemonic Co
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Symbolic Operation Codes variations
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Operand Entries Registers You can s
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Operand Entries “Program Structur
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Operand Entries Format │ Coded or
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Examples of Coded Machine Instructi
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Chapter 5. Assembler Instruction St
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*PROCESS Statement *PROCESS Stateme
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ACONTROL Instruction ►►──
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ACONTROL Instruction FLAG(PAGE0) in
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AINSERT Instruction character_strin
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AMODE Instruction alias_string is t
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CATTR Instruction Figure 25. AMODE/
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CATTR Instruction | statements for
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CCW1 Instruction data_count is an a
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CEJECT Instruction If symbol is an
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CNOP Instruction Figure 29 (Page 2
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COPY Instruction In the following e
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CSECT Instruction symbol in the nam
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DC Instruction ROUTINE B GAMMA DXD
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DC Instruction duplication_factor c
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DC Instruction Figure 33 (Page 2 of
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DC Instruction With EBCDIC spaces
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DC Instruction Further information
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DC Instruction | Symbols used in su
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DC Instruction The length attribute
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DC Instruction Notes: 1. Don't conf
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DC Instruction—Character Constant
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DC Instruction—Character Constant
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DC Instruction—Graphic Constant r
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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 Constants
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DC Instruction—Address Constants
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DC Instruction—Address Constants
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DC Instruction—Offset Constant re
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DC Instruction—Length Constant Le
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DC Instruction—Hexadecimal Floati
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DC Instruction—Binary Floating-Po
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DC Instruction—Binary Floating-Po
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DROP Instruction DROP Instruction T
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DS Instruction USING DSECTA,14 ALBL
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DS Instruction The size of a storag
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DSECT Instruction DSECT Instruction
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DXD Instruction ASEMBLY2 CSECT USIN
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END Instruction change but no addit
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EQU Instruction EQU Instruction The
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EQU Instruction 5. The length attri
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EXITCTL Instruction sequence_symbol
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ISEQ Instruction must be greater th
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LOCTR Instruction A CSECT , See not
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LTORG Instruction If symbol is an o
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MNOTE Instruction When two literals
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OPSYN Instruction ,ERROR, SEV 1 An
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Page 222 and 223: ORG Instruction If you specify mult
Page 224 and 225: POP Instruction POP Instruction The
Page 226 and 227: PRINT Instruction Note: If the next
Page 228 and 229: Process Statement Process Statement
Page 230 and 231: REPRO Instruction NOPRINT instructs
Page 232 and 233: RSECT Instruction 4. AMODE or RMODE
Page 234 and 235: START Instruction START Instruction
Page 236 and 237: TITLE Instruction The name value is
Page 238 and 239: USING Instruction Only the characte
Page 240 and 241: USING Instruction Base Registers fo
Page 242 and 243: USING Instruction If register 0 is
Page 244 and 245: USING Instruction A variable symbo
Page 246 and 247: USING Instruction In this MVC instr
Page 248 and 249: USING Instruction Range of a Depend
Page 250 and 251: XATTR Instruction external_symbol i
Page 252 and 253: XATTR Instruction SCOPE ►►─
Page 254 and 255: XATTR Instruction 234 HLASM V1R5 La
Page 256 and 257: Part 3. Macro Language &SYSDATC Sys
Page 258 and 259: Introduction to Macro Language Chap
Page 260 and 261: Introduction to Macro Language The
Page 262 and 263: Introduction to Macro Language Macr
Page 264 and 265: MACRO and MEND Statements The assem
Page 266 and 267: Prototype Statement Macros that are
Page 268 and 269: Model Statements generated from tha
Page 272 and 273: Model Statements Notes: 1. You can
Page 274 and 275: Positional Parameters Symbolic para
Page 276 and 277: Processing Statements Processing St
Page 278 and 279: AREAD Instruction Assign Local Time
Page 280 and 281: COPY Instruction sequence_symbol is
Page 282 and 283: System Variable Symbols System Vari
Page 284 and 285: &SYSADATA_MEMBER System Variable Sy
Page 286 and 287: &SYSCLOCK System Variable Symbol &S
Page 288 and 289: &SYSECT System Variable Symbol depe
Page 290 and 291: &SYSIN_MEMBER System Variable Symbo
Page 292 and 293: &SYSJOB System Variable Symbol &SYS
Page 294 and 295: &SYSLIN_DSN System Variable Symbol
Page 296 and 297: &SYSLIST System Variable Symbol The
Page 298 and 299: &SYSLOC System Variable Symbol To
Page 300 and 301: &SYSM_SEV System Variable Symbol &S
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Page 306 and 307: &SYSPARM System Variable Symbol Not
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Page 314 and 315: &SYSTERM_DSN System Variable Symbol
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Page 318 and 319: Macro Instruction Format sequence_s
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Macro Instruction Format Operand En
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Macro Instruction Format When you n
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Sublists in Operands the order in w
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Sublists in Operands &SYSLIST( n,m)
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Values in Operands Notes: 1. Spaces
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Values in Operands Parentheses In m
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Inner and Outer Macro Instructions
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Levels of Macro Call Nesting When t
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Levels of Macro Call Nesting System
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How to Write Conditional Assembly I
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SET Symbols SET Symbol Specificatio
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SET Symbols Figure 86 (Page 3 of 3)
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Data Attributes this example indica
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Data Attributes variable_symbol is
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Data Attributes The value of an att
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Data Attributes The following attri
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Data Attributes Assembler gives a t
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Data Attributes The scale attribute
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Data Attributes Number Attribute (N
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Data Attributes The operation code
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Lookahead MACRO &NAME MOVE &TO,&FRO
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Open Code Sequence Symbols The cond
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GBLA, GBLB, and GBLC Instructions G
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LCLA, LCLB, and LCLC Instructions s
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SETA Instruction expression is an a
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SETA Instruction | The logical-exp
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SETA Instruction | Figure 99 (Page
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SETA Instruction | The result of C2
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SETA Instruction NOT Format: Logica
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SETA Instruction | X2A Name Operati
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SETA Instruction In evaluating the
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SETB Instruction Any expression tha
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SETB Instruction ┌─────
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SETB Instruction | ISDEC | Format:
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SETB Instruction The two comparands
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SETC Instruction Notes: 1. The asse
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Figure 103. Substring Notation in C
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Loc Object Code Addr1 Addr2 Stmt So
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| B2C('111111') has value '3' | B2C
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| Output: D2B('decstring') converts
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SIGNED Format: Logical-expression,
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| X2D('') has value '+' | X2D('91')
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Concatenation of strings containing
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MACRO &NAME MOVE &TO,&FROM LCLC &PR
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SETAF Instruction Alternative State
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Branching Branching You can control
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AGO Instruction The extended AIF in
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ACTR Instruction AGOB—Synonym of
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ANOP Instruction statement processe
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MHELP Instruction MHELP B'10000000'
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400 HLASM V1R5 Language Reference
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Assembler Instructions and Statemen
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Summary of Constants Figure 113. Su
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Macro and Conditional Assembly Lang
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Standard Character Set Code Table H
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Standard Character Set Code Table H
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Trademarks AIX BookMaster CICS DFSM
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Bibliography SMP/E Reference, SC28-
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Index A2C (SETC built-in function)
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Index B B-type binary constant 141
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Index conditional assembly instruct
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Index elements of conditional assem
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Index instructions (continued) asse
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Index machine instruction statement
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Index operands (continued) compatib
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Index relative addressing 67 reloca
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Index sublists compatibility with A
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Index variable symbols (continued)
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Readers' Comments High Level Assemb
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IBM® Program Number: 5696-234 Prin
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