HLASM Language Reference

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Character Set Compatibility with Earlier Assemblers: You can specify the COMPAT(MACROCASE) assembler option to instruct the assembler to maintain uppercase alphabetic character set compatibility with earlier assemblers for unquoted macro operands. The assembler converts lowercase alphabetic characters (a through z) in unquoted macro operands to uppercase alphabetic characters (A through Z). Double-Byte Character Set In addition to the standard EBCDIC set of characters, High Level Assembler accepts double-byte character set (DBCS) data. The double-byte character set consists of the following: Figure 4. Double-Byte Character Set (DBCS) Double-byte space X'4040' Double-byte characters Each double-byte character contains two bytes, each of which must be in the range X'41' to X'FE'. The first byte of a double-byte character is known as the ward byte. For | example, the ward byte for the double-byte representation of EBCDIC characters is X'42'. Shift codes Shift-out (SO) - X'0E' Shift-in (SI) - X'0F' Note: 1. SO and SI delimit DBCS data only when the DBCS assembler option is specified. The DBCS assembler option is described in the HLASM Programmer's Guide. 2. When the DBCS assembler option is specified, double-byte characters may be used anywhere that EBCDIC characters enclosed by single quotation marks can be used. 3. Regardless of the invocation option, double-byte characters may be used in remarks, comments, and the statements processed by AREAD and REPRO statements. Examples showing the use of EBCDIC characters and double-byte characters are given in Figure 5. For a description of the DBCS notation used in the examples, see “Double-Byte Character Set Notation” on page xvi. Figure 5 (Page 1 of 2). Examples Using Character Set Characters Usage Example Constituting Alphanumeric In ordinary symbols Label FIELD#1 Save_Total | In variable symbols &EASY_TO_READ Digits As decimal self-defining terms 1 9 Terms Terms 12 HLASM V1R5 Language Reference
Character Set Figure 5 (Page 2 of 2). Examples Using Character Set Characters Usage Example Constituting Special Characters As operators + Addition NINE+FIVE Expressions − Subtraction NINE-5 Expressions Multiplication 9FIVE Expressions / Division TEN/3 Expressions + or − (Unary) +NINE -FIVE Terms As delimiters Spaces Between fields LABEL AR 3,4 Statement Comma Between operands OPND1,OPND2 Operand field Single Quotation Marks Enclosing character strings 'STRING' String Attribute operator L'OPND1 Term Parentheses Enclosing subfields or subexpressions MOVE MVC TO(8),FROM(A+B(C-D)) Statement Expression SO and SI Enclosing double-byte data C'abc' G'' Mixed string Pure DBCS As indicators for Ampersand Variable symbol &VAR Term Period Symbol qualifier QUAL.SYMBOL Term Sequence symbol .SEQ (label) Comment statement in macro definition .THIS IS A COMMENT Statement Concatenation &VAR.A Term Bit-length specification DC CL.7'AB' Operand Decimal point DC F'1.7E4' Operand Asterisk Location counter reference +72 Expression | Comment statement THIS IS A COMMENT Operand | Equal sign Literal reference L 6,=F'2' Operand Keyword &KEY=D Keyword parameter | Note: | 1. If these are passed as macro arguments, they are treated as expressions, not terms. Expressions | cannot be substituted into SETA expressions. Chapter 2. Coding and Structure 13
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 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
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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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XATTR Instruction SCOPE ►►─
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XATTR Instruction 234 HLASM V1R5 La
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Part 3. Macro Language &SYSDATC Sys
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Introduction to Macro Language Chap
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Introduction to Macro Language The
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Introduction to Macro Language Macr
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MACRO and MEND Statements The assem
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Prototype Statement Macros that are
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Model Statements generated from tha
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Model Statements ▌5▐ ▌6▐
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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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