HLASM Language Reference

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DC Instruction—Hexadecimal Floating-Point Constants ▌3▐ in Figure 51). If a sign is not specified for either the number or exponent, a plus sign is assumed. If you specify the 'H' type extension you can also specify a rounding mode that is used when the nominal value is converted from decimal to its hexadecimal form. The syntax for nominal values (including the binary floating-point constants) is shown in Figure 53 on page 168. The valid rounding mode values are: 1 Round by adding one in the first lost bit position 4 Unbiased round to nearest, with tie-breaking rule 5 Round towards zero (that is, truncate) 6 Round up towards the maximum positive value 7 Round down towards the minimum negative value Figure 50. Rounding Mode Values See ▌4▐ in Figure 51. The exponent must lie within the permissible range. If an exponent modifier is also specified, the algebraic sum of the exponent and the exponent modifier must lie within the permissible range. Figure 51 (Page 1 of 3). Hexadecimal Floating-Point Constants Subfield Value Example 1. Duplication factor Allowed 2. Type E, D, and L | 3. Type Extension Omitted or H or Q | 4. Program type Allowed 5. Modifiers Implicit length: (length modifier not present) E-type: 4 bytes D-type: 8 bytes L-type: 16 bytes Alignment: E-type: Fullword (Length modifier D-type: Doubleword not present) L-type: Doubleword | LQ-type: Quadword 162 HLASM V1R5 Language Reference
DC Instruction—Hexadecimal Floating-Point Constants Figure 51 (Page 2 of 3). Hexadecimal Floating-Point Constants Subfield Value Example Range for length: E-type: 1 to 8 (byte length) .1 to .64 (bit length) EH-type: .12 to .64 (bit length) D-type: 1 to 8 (byte length) .1 to .64 (bit length) DH-type: .12 to .64 (bit length) L-type: 1 to 16 (byte length) .1 to .128 (bit length) LH-type: .12 to .128 (bit length) | LQ-type: | .12 to .128 (bit length) Range for scale: E-type: 0 to 14 D-type: 0 to 14 L-type: 0 to 28 Range for exponent: −85 to +75 6. Nominal value Represented by: Decimal digits E-type: DC E'+525' ▌1▐ DC E'5.25' ▌2▐ Enclosed by: Single quotation marks D-type: DC D'−525' ▌1▐ DC D'+.1' ▌2▐ L-type: DC L'525' DC L'3.414' ▌2▐ Exponent allowed: Yes E-type: DC E'1E+6' ▌3▐ D-type: DC D'−2.5E1' ▌3▐ Rounding mode allowed if type extension specified: Yes (see Figure 50 for values) L-type: DC L'3.712E−3' ▌3▐ E-type: DC EH'1E+6R1' ▌4▐ D-type: DC DH'−2.5E1R4' ▌4▐ L-type: DC LH'3.712E−3R5' ▌4▐ Chapter 5. Assembler Instruction Statements 163
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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
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 184 and 185: DC Instruction—Hexadecimal Floati
Page 186 and 187: 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
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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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