HLASM Language Reference

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POP Instruction POP Instruction The POP instruction restores the PRINT, USING or ACONTROL status saved by the most recent PUSH instruction. ┌─,──────────────┐ ►►──┬─────────────────┬──POP─── ▼ ─┬─PRINT────┬ ── (1) ─┴──┬──────────┬─────►◄ └─sequence_symbol─ ┘ ├ ─USING────┤ └ ─,NOPRINT─┘ └─ACONTROL─┘ Note: 1 Each keyword from this group may be selected only once. sequence_symbol is a sequence symbol. PRINT instructs the assembler to restore the PRINT status to the status saved by the most recent PUSH instruction. USING instructs the assembler to restore the USING status to the status saved by the most recent PUSH instruction. ACONTROL instructs the assembler to restore the ACONTROL status to the status saved by the most recent PUSH instruction. NOPRINT instructs the assembler to suppress the printing of the POP statement in which it is specified. The POP instruction causes the status of the current PRINT, USING or ACONTROL instruction to be overridden by the PRINT, USING or ACONTROL status saved by the last PUSH instruction. For example: PRINT GEN Printed macro generated code DCMAC X,27 Call macro to generate DC + DC X'27' ... Generated statement PUSH PRINT Save PRINT status PRINT NOGEN Suppress macro generated code DCMAC X,33 Call macro to generate DC POP PRINT Restore PRINT status DCMAC X,42 Call macro to generate DC + DC X'42' ... Generated statement PRINT Instruction The PRINT instruction controls the amount of detail printed in the listing of programs. ┌─,───────┐ ►►──┬─────────────────┬──PRINT─── ▼ ─operand─┴────────────────────────►◄ └─sequence_symbol─┘ 204 HLASM V1R5 Language Reference
PRINT Instruction sequence_symbol is a sequence symbol. operand is an operand from one of the groups of operands described below. If a null operand is supplied, it is accepted by the assembler with no effect on the other operands specified. The operands are listed in hierarchic order. The effect, if any, of one operand on other operands is also described. ┌─ON──┐ ►►──┼─────┼────────────────────────────────────────────────────────►◄ └─OFF─┘ ON instructs the assembler to print, or resume printing, the source and object section of the assembler listing. OFF instructs the assembler to stop printing the source and object section of the assembler listing. A subsequent PRINT ON instruction resumes printing. When this operand is specified the printing actions requested by the GEN, DATA, MCALL, and MSOURCE operands do not apply. ┌─GEN───┐ ►►──┼───────┼──────────────────────────────────────────────────────►◄ └─NOGEN─┘ GEN instructs the assembler to print all statements generated by the processing of a macro. This operand does not apply if PRINT OFF has been specified. NOGEN instructs the assembler not to print statements generated by conditional assembly or the processing of a macro. This applies to all levels of macro nesting; no generated code is displayed while PRINT NOGEN is in effect. If this operand is specified, the DATA operand does not apply to constants that are generated during macro processing. Also, if this operand is specified, the MSOURCE operand does not apply. When the PRINT NOGEN instruction is in effect, the assembler prints one of the following on the same line as the macro call or model statement: The object code for the first instruction generated. The object code includes the data that is shown under the ADDR1 and ADDR2 columns of the assembler listing. The first 8 bytes of generated data from a DC instruction When the assembler forces alignment of an instruction or data constant, it generates zeros in the object code and prints the generated object code in the listing. When you use the PRINT NOGEN instruction the generated zeros are not printed. Chapter 5. Assembler Instruction Statements 205
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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
Page 174 and 175: DC Instruction—Address Constants
Page 176 and 177: DC Instruction—Address Constants
Page 178 and 179: DC Instruction—Offset Constant re
Page 180 and 181: DC Instruction—Length Constant Le
Page 182 and 183: DC Instruction—Hexadecimal Floati
Page 188 and 189: DC Instruction—Binary Floating-Po
Page 190 and 191: DC Instruction—Binary Floating-Po
Page 192 and 193: DROP Instruction DROP Instruction T
Page 194 and 195: DS Instruction USING DSECTA,14 ALBL
Page 196 and 197: DS Instruction The size of a storag
Page 198 and 199: DSECT Instruction DSECT Instruction
Page 200 and 201: DXD Instruction ASEMBLY2 CSECT USIN
Page 202 and 203: END Instruction change but no addit
Page 204 and 205: EQU Instruction EQU Instruction The
Page 206 and 207: EQU Instruction 5. The length attri
Page 208 and 209: EXITCTL Instruction sequence_symbol
Page 210 and 211: ISEQ Instruction must be greater th
Page 212 and 213: LOCTR Instruction A CSECT , See not
Page 214 and 215: LTORG Instruction If symbol is an o
Page 216 and 217: MNOTE Instruction When two literals
Page 218 and 219: OPSYN Instruction ,ERROR, SEV 1 An
Page 220 and 221: ORG Instruction AFTER is defined in
Page 222 and 223: ORG Instruction If you specify mult
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 270 and 271: Model Statements ▌5▐ ▌6▐
Page 272 and 273: Model Statements Notes: 1. You can
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Positional Parameters Symbolic para
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Processing Statements Processing St
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AREAD Instruction Assign Local Time
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COPY Instruction sequence_symbol is
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System Variable Symbols System Vari
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&SYSADATA_MEMBER System Variable Sy
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&SYSCLOCK System Variable Symbol &S
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&SYSECT System Variable Symbol depe
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&SYSIN_MEMBER System Variable Symbo
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&SYSJOB System Variable Symbol &SYS
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&SYSLIN_DSN System Variable Symbol
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&SYSLIST System Variable Symbol The
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&SYSLOC System Variable Symbol To
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&SYSM_SEV System Variable Symbol &S
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&SYSNDX System Variable Symbol The
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&SYSOPT_DBCS System Variable Symbol
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&SYSPARM System Variable Symbol Not
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&SYSPRINT_MEMBER System Variable Sy
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&SYSPUNCH_MEMBER System Variable Sy
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&SYSSTEP System Variable Symbol Not
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&SYSTERM_DSN System Variable Symbol
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&SYSTIME System Variable Symbol Not
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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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