HLASM Language Reference

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Contents Source Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 | Sections, Elements, and Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 | Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Reference Control Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 | Classes (MVS and CMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 | Parts (MVS and CMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Location Counter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Addressing within Source Modules: Establishing Addressability . . . . . . . . 64 Base Register Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Qualified Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Dependent Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Relative Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Literal Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Establishing Residence and Addressing Mode . . . . . . . . . . . . . . . . . . 68 Symbolic Linkages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 External Symbol Dictionary Entries . . . . . . . . . . . . . . . . . . . . . . . . 72 | Summary of Source and Object Program Structures . . . . . . . . . . . . . . 73 Part 2. Machine and Assembler Instruction Statements . . . . . . . . . . . . . . . . . . 75 Chapter 4. Machine Instruction Statements . . . . . . . . . . . . . . . . . . . 78 General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Decimal Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Floating-Point Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Input/Output Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Branching with Extended Mnemonic Codes . . . . . . . . . . . . . . . . . . . . . 80 | Alternative Mnemonics for some Branch Relative Instructions . . . . . . . . . 83 Statement Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Symbolic Operation Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Operand Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Immediate Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Examples of Coded Machine Instructions . . . . . . . . . . . . . . . . . . . . . . 91 RI Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 RR Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 RS Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 RSI Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 RX Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 SI Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 SS Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Chapter 5. Assembler Instruction Statements . . . . . . . . . . . . . . . . . 100 64-bit Addressing Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 *PROCESS Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 ACONTROL Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 ADATA Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 AINSERT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 ALIAS Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 AMODE Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 iv HLASM V1R5 Language Reference

Contents CATTR Instruction (MVS and CMS) . . . . . . . . . . . . . . . . . . . . . . . . . 112 CCW and CCW0 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 CCW1 Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 CEJECT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 CNOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 COM Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 COPY Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 CSECT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 CXD Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 DC Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 Rules for DC Operand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 General Information About Constants . . . . . . . . . . . . . . . . . . . . . . . 129 Padding and Truncation of Values . . . . . . . . . . . . . . . . . . . . . . . . . 130 Subfield 1: Duplication Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 Subfield 2: Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Subfield 3: Type Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 Subfield 4: Program type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Subfield 5: Modifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Subfield 6: Nominal Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 DROP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 DS Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 DSECT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 DXD Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 EJECT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181 END Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182 ENTRY Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 EQU Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Using Conditional Assembly Values . . . . . . . . . . . . . . . . . . . . . . . . 187 EXITCTL Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 EXTRN Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 ICTL Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 ISEQ Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 LOCTR Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 LTORG Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193 Literal Pool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194 Addressing Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Duplicate Literals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 MNOTE Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 OPSYN Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 ORG Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 POP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 PRINT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 Process Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 PUNCH Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 PUSH Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 REPRO Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 RMODE Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 RSECT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 SPACE Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 START Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 TITLE Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 USING Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 How to Use the USING Instruction . . . . . . . . . . . . . . . . . . . . . . . . 219 Base Registers for Absolute Addresses . . . . . . . . . . . . . . . . . . . . . . 220 Contents v

Page 1: High Level Assembler for MVS & VM &

Page 4 and 5: Note! Before using this information

Page 8 and 9: Contents Ordinary USING Instruction

Page 10 and 11: Contents Sublists in Operands . . .

Page 12 and 13: About this Manual This manual descr

Page 14 and 15: IBM High Level Assembler for MVS &

Page 16 and 17: | The Internet. You can access IBM

Page 18 and 19: ▌C▐ The item referred to by ▌

Page 20 and 21: Miscellany The ASCII translation t

Page 22 and 23: Part 1. Assembler Language—Struct

Page 24 and 25: Language Compatibility Language Com

Page 26 and 27: Assembler Program Assembler Program

Page 28 and 29: Relationship of Assembler to Operat

Page 30 and 31: Coding Made Easier Linkage between

Page 32 and 33: Character Set Compatibility with Ea

Page 34 and 35: Assembler Language Coding Conventio




Page 42 and 43: Assembler Language Structure Condit

Page 44 and 45: Assembler Language Structure Machin

Page 46 and 47: Assembler Language Structure Condit

Page 48 and 49: Terms, Literals, and Expressions Te

Page 50 and 51: Terms, Literals, and Expressions -

Page 52 and 53: Terms, Literals, and Expressions As

Page 54 and 55: Terms, Literals, and Expressions Se

Page 56 and 57: Terms, Literals, and Expressions Fo

Page 58 and 59: Terms, Literals, and Expressions I

Page 60 and 61: Terms, Literals, and Expressions Th

Page 62 and 63: Terms, Literals, and Expressions 1.

Page 64 and 65: Terms, Literals, and Expressions

Page 66 and 67: Terms, Literals, and Expressions

Page 68 and 69: Terms, Literals, and Expressions Th

Page 70 and 71: | Chapter 3. Program Structures and

Page 72 and 73: Source Module A source module is co

Page 74 and 75: The CSECT instruction can be used a

Page 76 and 77: | in linker control statements for

Page 78 and 79: This is not only convenient, but it

Page 80 and 81: | SECT_A CSECT , Define section SEC

Page 82 and 83: | For executable sections, the loca

Page 84 and 85: Addressing | The System/390® and z

Page 86 and 87: Addressing | Parts must always be r

Page 88 and 89: Addressing Literal Pools ALPHA LR 3

Page 90 and 91: Addressing If the symbol is the nam

Page 92 and 93: Addressing External Symbol Dictiona

Page 94 and 95: Addressing 74 HLASM V1R5 Language R

Page 96 and 97: Part 2. Machine and Assembler Instr

Page 98 and 99: General Instructions Chapter 4. Mac

Page 100 and 101: Input/Output Operations For further

Page 102 and 103: Branching with Extended Mnemonic Co

Page 104 and 105: Symbolic Operation Codes variations

Page 106 and 107: Operand Entries Registers You can s

Page 108 and 109: Operand Entries “Program Structur

Page 110 and 111: Operand Entries Format │ Coded or

Page 112 and 113: Examples of Coded Machine Instructi




Page 120 and 121: Chapter 5. Assembler Instruction St

Page 122 and 123: *PROCESS Statement *PROCESS Stateme

Page 124 and 125: ACONTROL Instruction ►►──

Page 126 and 127: ACONTROL Instruction FLAG(PAGE0) in

Page 128 and 129: AINSERT Instruction character_strin

Page 130 and 131: AMODE Instruction alias_string is t

Page 132 and 133: CATTR Instruction Figure 25. AMODE/

Page 134 and 135: CATTR Instruction | statements for

Page 136 and 137: CCW1 Instruction data_count is an a

Page 138 and 139: CEJECT Instruction If symbol is an

Page 140 and 141: CNOP Instruction Figure 29 (Page 2

Page 142 and 143: COPY Instruction In the following e

Page 144 and 145: CSECT Instruction symbol in the nam

Page 146 and 147: DC Instruction ROUTINE B GAMMA DXD

Page 148 and 149: DC Instruction duplication_factor c

Page 150 and 151: DC Instruction Figure 33 (Page 2 of

Page 152 and 153: DC Instruction With EBCDIC spaces

Page 154 and 155: DC Instruction Further information

Page 156 and 157: DC Instruction | Symbols used in su

Page 158 and 159: DC Instruction The length attribute

Page 160 and 161: DC Instruction Notes: 1. Don't conf

Page 162 and 163: DC Instruction—Character Constant

Page 164 and 165: DC Instruction—Character Constant

Page 166 and 167: DC Instruction—Graphic Constant r

Page 168 and 169: DC Instruction—Fixed-Point Consta

Page 170 and 171: DC Instruction—Fixed-Point Consta

Page 172 and 173: 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 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 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 302 and 303: &SYSNDX System Variable Symbol The

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

Page 320 and 321: Macro Instruction Format Operand En

Page 322 and 323: Macro Instruction Format When you n

Page 324 and 325: Sublists in Operands the order in w

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

Page 348 and 349: Data Attributes The value of an att

Page 350 and 351: Data Attributes The following attri

Page 352 and 353: Data Attributes Assembler gives a t

Page 354 and 355: Data Attributes The scale attribute

Page 356 and 357: Data Attributes Number Attribute (N

Page 358 and 359: Data Attributes The operation code

Page 360 and 361: Lookahead MACRO &NAME MOVE &TO,&FRO

Page 362 and 363: Open Code Sequence Symbols The cond

Page 364 and 365: GBLA, GBLB, and GBLC Instructions G

Page 366 and 367: LCLA, LCLB, and LCLC Instructions s

Page 368 and 369: SETA Instruction expression is an a

Page 370 and 371: SETA Instruction | The logical-exp

Page 372 and 373: SETA Instruction | Figure 99 (Page

Page 374 and 375: SETA Instruction | The result of C2

Page 376 and 377: SETA Instruction NOT Format: Logica

Page 378 and 379: SETA Instruction | X2A Name Operati

Page 380 and 381: SETA Instruction In evaluating the

Page 382 and 383: SETB Instruction Any expression tha

Page 384 and 385: SETB Instruction ┌─────

Page 386 and 387: SETB Instruction | ISDEC | Format:

Page 388 and 389: SETB Instruction The two comparands

Page 390 and 391: SETC Instruction Notes: 1. The asse

Page 392 and 393: Figure 103. Substring Notation in C

Page 394 and 395: Loc Object Code Addr1 Addr2 Stmt So

Page 396 and 397: | B2C('111111') has value '3' | B2C

Page 398 and 399: | Output: D2B('decstring') converts

Page 400 and 401: SIGNED Format: Logical-expression,

Page 402 and 403: | X2D('') has value '+' | X2D('91')

Page 404 and 405: Concatenation of strings containing

Page 406 and 407: MACRO &NAME MOVE &TO,&FROM LCLC &PR

Page 408 and 409: SETAF Instruction Alternative State

Page 410 and 411: Branching Branching You can control

Page 412 and 413: AGO Instruction The extended AIF in

Page 414 and 415: ACTR Instruction AGOB—Synonym of

Page 416 and 417: ANOP Instruction statement processe

Page 418 and 419: MHELP Instruction MHELP B'10000000'

Page 420 and 421: 400 HLASM V1R5 Language Reference

Page 422 and 423: Assembler Instructions and Statemen



Page 428 and 429: Summary of Constants Figure 113. Su

Page 430 and 431: Macro and Conditional Assembly Lang






Page 442 and 443: Standard Character Set Code Table H

Page 444 and 445: Standard Character Set Code Table H

Page 446 and 447: Trademarks AIX BookMaster CICS DFSM

Page 448 and 449: Bibliography SMP/E Reference, SC28-

Page 450 and 451: Index A2C (SETC built-in function)

Page 452 and 453: Index B B-type binary constant 141

Page 454 and 455: Index conditional assembly instruct

Page 456 and 457: Index elements of conditional assem

Page 458 and 459: Index instructions (continued) asse

Page 460 and 461: Index machine instruction statement

Page 462 and 463: Index operands (continued) compatib

Page 464 and 465: Index relative addressing 67 reloca

Page 466 and 467: Index sublists compatibility with A

Page 468: Index variable symbols (continued)

Page 471 and 472: Readers' Comments High Level Assemb

Page 474: IBM® Program Number: 5696-234 Prin

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