HLASM Language Reference

More documents

Recommendations

Info

MHELP Instruction MHELP B'10000000' or MHELP 128, MHELP Suppression: This option suppresses all currently active MHELP options. MHELP Control on &SYSNDX: The maximum value of the &SYSNDX system variable can be controlled by the MHELP instruction. The limit is set by specifying a number in the operand of the MHELP instruction that is not one of the MHELP codes defined above, and is in the following number ranges: 256 to 65535 Most numbers in the range 65792 to 9999999. Refer to MHELP Operand Mapping below for details. When the &SYSNDX limit is reached, message ASMA13S ACTR counter exceeded is issued, and the assembler in effect ignores all further macro calls. MHELP Operand Mapping The MHELP operand field is actually mapped into a fullword. The predefined MHELP codes correspond to the fourth byte of this fullword, while the &SYSNDX limit is controlled by setting any bit in the third byte to 1. If all bits in the third byte are 0, then the &SYSNDX limit is not set. The bit settings for bytes 3 and 4 are shown in Figure 108. Figure 108. &SYSNDX Control Bits Byte Description Byte 3 - &SYSNDX control 1... .... Bit 0 = 1. Value=32768. Limit &SYSNDX to 32768. .1.. .... Bit 1 = 1. Value=16384. Limit &SYSNDX to 16384. ..1. .... Bit 2 = 1. Value=8192. Limit &SYSNDX to 8192. ...1 .... Bit 3 = 1. Value=4096. Limit &SYSNDX to 4096. .... 1... Bit 4 = 1. Value=2048. Limit &SYSNDX to 2048. .... .1.. Bit 5 = 1. Value=1024. Limit &SYSNDX to 1024. .... ..1. Bit 6 = 1. Value=512. Limit &SYSNDX to 512. .... ...1 Bit 7 = 1. Value=256. Limit &SYSNDX to 256. Byte 4 1... .... Bit 0 = 1. Value=128. MHELP Suppression. .1.. .... Bit 1 = 1. Value=64. Macro Hex Dump. ..1. .... Bit 2 = 1. Value=32. Global Suppression. ...1 .... Bit 3 = 1. Value=16. Macro Entry Dump. .... 1... Bit 4 = 1. Value=8. Macro Exit Dump. .... .1.. Bit 5 = 1. Value=4. Macro AIF Dump. .... ..1. Bit 6 = 1. Value=2. Macro Branch Trace. .... ...1 Bit 7 = 1. Value=1. Macro Call Trace. Note: You can use any combination of bit settings in any byte of the MHELP fullword to set the limit, provided at least one bit in byte 3 is set. This explains why not all values between 65792 and 9999999 can be used to set the limit. For example, the number 131123 does not set the &SYSNDX limit because none of the bits in byte 3 are set to 1. Examples: MHELP 256 Limit &SYSNDX to 256 MHELP 1 Trace macro calls MHELP 65536 No effect. No bits in bytes 3,4 MHELP 65792 Limit &SYSNDX to 65792 398 HLASM V1R5 Language Reference
MHELP Instruction See Figure 109 on page 399 for more examples. Combining Options More than one MHELP option, including the limit for &SYSNDX, can be specified at the same time by combining the option codes in one MHELP operand. For example, call and branch traces can be invoked by: MHELP B'11' MHELP 2+1 MHELP 3 Substitution by variable symbols may also be used. ┌────────────────────────┬───────────────────────────────────┬───────────────────────────────────┐ │ MHELP Instruction │ MHELP Operand │ MHELP Effect │ ├────────────────────────┼──────────┬────────────────────────┤ │ │ │ Decimal │ Hexadecimal │ │ │ │ ├──────┬─────────┬───────┤ │ │ │ │ │ &SYSNDX │ MHELP │ │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP 4869 │ 4869 │ │ 13 │ 5 │ Macro call trace and AIF dump; │ │ │ │ │ │ │ &SYSNDX limited to 4869 │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP 65536 │ 65536 │ 1 │ │ │ No effect │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP 16777232 │ 16777232 │ 1 │ │ 1 │ Macro entry dump │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP 28678 │ 28678 │ │ 7 │ 6 │ Macro branch trace and AIF dump; │ │ │ │ │ │ │ &SYSNDX limited to 28678 │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP 256+1 │ 257 │ │ 1 │ 1 │ Macro call trace; │ │ │ │ │ │ │ &SYSNDX limited to 257 │ ├────────────────────────┼──────────┼──────┼─────────┼───────┼───────────────────────────────────┤ │ MHELP B'11' │ 3 │ │ │ 3 │ Macro call trace, and │ │ │ │ │ │ │ macro branch trace │ └────────────────────────┴──────────┴──────┴─────────┴───────┴───────────────────────────────────┘ Figure 109. MHELP Control on &SYSNDX Chapter 10. MHELP Instruction 399
Page 1:
High Level Assembler for MVS & VM &
Page 4 and 5:
Note! Before using this information
Page 6 and 7:
Contents Source Module . . . . . .
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 36 and 37:
Page 38 and 39:
Page 40 and 41:
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 114 and 115:
Page 116 and 117:
Page 118 and 119:
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 184 and 185:
Page 186 and 187:
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 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
show all

HLASM Language Reference

Create successful ePaper yourself

Delete template?

Save as template?