HLASM Language Reference

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&SYSNDX System Variable Symbol The maximum value for &SYSNDX can be controlled by the MHELP instruction described under “MHELP Control on &SYSNDX” on page 398. Notes: 1. &SYSNDX does not generate a valid symbol, and it must: Follow the alphabetic character to which it is concatenated Be concatenated to a symbol containing 59 characters or fewer 2. The value of the type attribute of &SYSNDX (T'&SYSNDX) is always N. 3. The value of the count attribute (K'&SYSNDX) is equal to the number of digits generated. If a symbol generated by one macro is to be referenced by code generated by another macro, the two macros must provide means for communicating the necessary information. Their respective values of &SYSNDX cannot be guaranteed to differ by any fixed amount. The example that follows shows the use of &SYSNDX, and a way to communicate local &SYSNDX values among macro instructions. It is assumed that the first macro instruction processed, OUTER1, is the 106th macro instruction processed by the assembler. MACRO INNER1 GBLC &NDXNUM A&SYSNDX SR 2,5 Statement 1 CR 2,5 BE B&NDXNUM Statement 2 B A&SYSNDX Statement 3 MEND MACRO &NAME OUTER1 GBLC &NDXNUM &NDXNUM SETC '&SYSNDX' Statement 4 &NAME SR 2,4 AR 2,6 INNER1 Statement 5 B&SYSNDX S 2,=F'1' Statement 6 MEND ------------------------------------------------------------------- ALPHA OUTER1 Statement 7 BETA OUTER1 Statement 8 ------------------------------------------------------------------- ALPHA SR 2,4 AR 2,6 A17 SR 2,5 CR 2,5 BE B16 B A17 B16 S 2,=F'1' BETA SR 2,4 AR 2,6 A19 SR 2,5 CR 2,5 BE B18 B A19 B18 S 2,=F'1' 282 HLASM V1R5 Language Reference
&SYSNEST System Variable Symbol Statement 7 is the 106th macro instruction processed. Therefore, &SYSNDX is assigned the number 0106 for that macro instruction. The number 0106 is substituted for &SYSNDX when it is used in statements 4 and 6. Statement 4 is used to assign the character value 16 to the SETC symbol &NDXNUM Statement 6 is used to create the unique name B16. Statement 5 is the 107th macro instruction processed. Therefore, &SYSNDX is assigned the number 17 for that macro instruction. The number 17 is substituted for &SYSNDX when it is used in statements 1 and 3. The number 16 is substituted for the global-scope SETC symbol &NDXNUM in statement 2. Statement 8 is the 108th macro instruction processed. Therefore, each occurrence of &SYSNDX is replaced by the number 18. For example, statement 6 is used to create the unique name B18. When statement 5 is used to process the 108th macro instruction, statement 5 becomes the 109th macro instruction processed. Therefore, each occurrence of &SYSNDX is replaced by the number 19. For example, statement 1 is used to create the unique name A19. &SYSNEST System Variable Symbol Use &SYSNEST to obtain the current macro instruction nesting level. The local-scope system variable symbol &SYSNEST is assigned a read-only value each time a macro definition is called from a source module. The value assigned to &SYSNEST is a number from 1 to 99999999. No leading zeros are generated as part of the number. When a macro is called from open code, the value assigned to &SYSNEST is the number 1. Each time a macro definition is called by an inner macro instruction, the value assigned to &SYSNEXT is incremented by 1. Each time an inner macro exits, the value is decremented by 1. Notes: 1. The value of the type attribute of &SYSNEST (T'&SYSNEST) is always N. 2. The value of the count attribute (K'&SYSNEST) is equal to the number of digits assigned. The following example shows the values assigned to &SYSNEST: Chapter 7. How to Specify Macro Definitions 283
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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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ORG Instruction AFTER is defined in
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ORG Instruction If you specify mult
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POP Instruction POP Instruction The
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PRINT Instruction Note: If the next
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Process Statement Process Statement
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REPRO Instruction NOPRINT instructs
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RSECT Instruction 4. AMODE or RMODE
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START Instruction START Instruction
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TITLE Instruction The name value is
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USING Instruction Only the characte
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USING Instruction Base Registers fo
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USING Instruction If register 0 is
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USING Instruction A variable symbo
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USING Instruction In this MVC instr
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USING Instruction Range of a Depend
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XATTR Instruction external_symbol i
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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 270 and 271: Model Statements ▌5▐ ▌6▐
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
Page 304 and 305: &SYSOPT_DBCS System Variable Symbol
Page 306 and 307: &SYSPARM System Variable Symbol Not
Page 308 and 309: &SYSPRINT_MEMBER System Variable Sy
Page 310 and 311: &SYSPUNCH_MEMBER System Variable Sy
Page 312 and 313: &SYSSTEP System Variable Symbol Not
Page 314 and 315: &SYSTERM_DSN System Variable Symbol
Page 316 and 317: &SYSTIME System Variable Symbol Not
Page 318 and 319: Macro Instruction Format sequence_s
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Page 326 and 327: Sublists in Operands &SYSLIST( n,m)
Page 328 and 329: Values in Operands Notes: 1. Spaces
Page 330 and 331: Values in Operands Parentheses In m
Page 332 and 333: Inner and Outer Macro Instructions
Page 334 and 335: Levels of Macro Call Nesting When t
Page 336 and 337: Levels of Macro Call Nesting System
Page 338 and 339: How to Write Conditional Assembly I
Page 340 and 341: SET Symbols SET Symbol Specificatio
Page 342 and 343: SET Symbols Figure 86 (Page 3 of 3)
Page 344 and 345: Data Attributes this example indica
Page 346 and 347: Data Attributes variable_symbol is
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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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