HLASM: V1R6 Language Ref

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DC instruction—Hexadecimal floating-point constantsThe syntax for nominal values (including the binary floating-point constants) isshown in Figure 20 on page 167. The valid rounding mode values are:1 Round by adding one in the first lost bit position4 Unbiased round to nearest, with tie-breaking rule5 Round towards zero (that is, truncate)6 Round up towards the maximum positive value7 Round down towards the minimum negative valueFigure 18. Rounding mode valuesSee ▌4▐ in Table 34.The exponent must lie within the permissible range. If an exponent modifier is alsospecified, the algebraic sum of the exponent and the exponent modifier must liewithin the permissible range.Table 34. Hexadecimal floating-point constantsSubfield Value Example1. Duplication factor Allowed2. Type E, D, and L3. Type Extension Omitted or H or Q4. Program type Allowed5. ModifiersImplicit length:(length modifiernot present)Alignment:(Length modifiernot present)E-type: 4 bytesD-type: 8 bytesL-type: 16 bytesE-type: FullwordD-type: DoublewordL-type: DoublewordLQ-type: QuadwordRange 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 5D-type: 0 to 13L-type: 0 to 27Range for exponent: −85 to +75160 HLASM: V1R6 Language Ref
DC instruction—Hexadecimal floating-point constantsTable 34. Hexadecimal floating-point constants (continued)Subfield Value Example6. Nominal valueRepresented by: Decimal digits E-type:DC E’+525’ ▌1▐DC E’5.25’ ▌2▐Enclosed by: Single quotation marksD-type:DC D’−525’ ▌1▐DC D’+.001’ ▌2▐L-type:DC L’525’DC L’3.414’ ▌2▐Exponent allowed: Yes E-type:DC E’1E+60’ ▌3▐D-type:DC D’−2.5E10’ ▌3▐Rounding modeallowed iftype extensionspecified:Yes (see Figure 18 on page 160 forvalues)L-type:DC L’3.712E−3’ ▌3▐E-type:DC EH’1E+60R1’ ▌4▐D-type:DC DH’−2.5E10R4’ ▌4▐Number of valuesper operand:MultiplePadding: Correct fraction is extended to theright and roundedTruncation ofassembled value:Only if rounding mode 5; roundedotherwise.L-type:DC LH’3.712E−3R5’ ▌4▐The format of the constant is shown in Figure 19 on page 163.The value of the constant is represented by two parts:v An exponent portion (see ▌1▐ in Figure 19 on page 163), followed byv A fractional portion (see ▌2▐ in Figure 19)A sign bit (see ▌3▐ in Figure 19) indicates whether a positive or negative numberhas been specified. The number specified must first be converted into ahexadecimal fraction before it can be assembled into the correct internal format.The quantity expressed is the product of the fraction (see ▌4▐ in Figure 19) and thenumber 16 raised to a power (see ▌5▐ in Figure 19). Figure 19 shows the externalformat of the three types of floating-point constants.Here is the range of values that can be assembled into hexadecimal floating-pointconstants:Chapter 5. Assembler instruction statements 161
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High Level Assembler for z/OS & z/V
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Note!Before using this information
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|Open code . . . . . . . . . . . .
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Programming interface informationOr
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IBM High Level Assembler for z/OS &
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Syntax notationFormat▌A▐ ▌B
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Double-byte character set notationx
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Summary of changesxvi HLASM: V1R6 L
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Chapter 1. IntroductionA computer c
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Assembler languagev Macro instructi
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Assembler programProcessingConditio
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Coding made easierCoding made easie
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Chapter 2. Coding and structureThis
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Character setTable 4. Examples usin
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Assembler language coding conventio
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Assembler language structureThe mac
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Assembler language structureMachine
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Assembler language structureConditi
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Mnemonic tags|||||||||For example,
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Terms, literals, and expressions- T
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Terms, literals, and expressionsAss
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Terms, literals, and expressionsUsi
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Terms, literals, and expressions|||
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Terms, literals, and expressionsz/V
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Terms, literals, and expressionsTab
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Terms, literals, and expressions1.
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Terms, literals, and expressions1.
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Terms, literals, and expressions┌
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Terms, literals, and expressionsA-Y
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Chapter 3. Program structures and a
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SourcemoduleA source module is comp
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Beginning of a source modulev The S
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Beginning of a source moduleReferen
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Beginning of a source moduleNote: T
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Beginning of a source moduleClass l
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Beginning of a source modulez/VM an
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AddressingBase Address Definition:
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QualifiedDependentaddressingQualifi
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Addressingz/VM and z/OSWhen you spe
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Addressing..EX_SYM DC V(EXMOD1) Add
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AddressingSee the appendix “Objec
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Part 2. Machine and assembler instr
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Chapter 4. Machine instruction stat
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Input/output operationsThe input or
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Branching with extended mnemonic co
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Statement formatsSymbolic operation
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Operand entriesRegistersYou can spe
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Operand entriesv Explicitly—in a
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Operand entriesImmediateused by the
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Examples of coded machine instructi
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Chapter 5. Assembler instruction st
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*PROCESS statementstatement, follow
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ACONTROL instruction►►NOCOMPAT,
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ACONTROL instructionFLAG(PAGE0)inst
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ACONTROL instruction|||may be fetch
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AINSERT instruction►►sequence_s
Page 127 and 128: ALIAS instruction||||||The alias_st
Page 129 and 130: AMODE instructionCATTR instruction
Page 131 and 132: CATTR instructionRMODE(ANY)The text
Page 133 and 134: CCW and CCW0 instructionssupport 31
Page 135 and 136: CEJECT instructionIf number of line
Page 137 and 138: CNOP instructionAfter the BALR inst
Page 139 and 140: COPY instructioncopied from either
Page 141 and 142: CSECT instructionsame section name
Page 143 and 144: CXD instructionZETA: the resulting
Page 145 and 146: DC instruction10EBP(7)L2’12’the
Page 147 and 148: DC instructionTable 17. Length attr
Page 149 and 150: DC instruction4. Double-byte data i
Page 151 and 152: DC instructionTable 19. Type codes
Page 153 and 154: DC instructionYou may omit the modi
Page 155 and 156: DC instructionfirst constant to be
Page 157 and 158: DC instructionTable 21. Specifying
Page 159 and 160: DC instruction—Character constant
Page 161 and 162: DC instruction—Character constant
Page 163 and 164: DC instruction—Graphic constantTa
Page 165 and 166: DC instruction—Fixed-point consta
Page 167 and 168: DC instruction—Fixed-point consta
Page 169 and 170: DC instruction—Decimal constantsD
Page 171 and 172: DC instruction—Address constants|
Page 173: DC instruction—Address constantsT
Page 176 and 177: DC instruction—Offset constantIn
Page 180 and 181: DC instruction—Hexadecimal floati
Page 182 and 183: DC instruction—Hexadecimal floati
Page 184 and 185: DC instruction—Decimal floating-p
Page 186 and 187: Syntax of binary, decimal, and hexa
Page 188 and 189: DC instruction—Binary floating-po
Page 190 and 191: DROP instructionLabeledDependentIf
Page 192 and 193: DS instructionv An ordinary symbolv
Page 194 and 195: DS instructionthe data that follows
Page 196 and 197: DSECT instructionTo effect referenc
Page 198 and 199: DXD instructionnominal_valueis the
Page 200 and 201: END instructionNotes:1. If the END
Page 202 and 203: EQU instruction||||to the symbol in
Page 204 and 205: EQU instruction|FPR Register - Floa
Page 206 and 207: EXITCTL instructionSee the section
Page 208 and 209: ISEQ instruction►►sequence_symb
Page 210 and 211: LOCTR instructionA LOCTR name may b
Page 212 and 213: LTORG instructionAddressingDuplicat
Page 214 and 215: MNOTE instructionNote: The maximum
Page 216 and 217: OPSYN instruction||||||v An operati
Page 218 and 219: ORG instruction||||||||If symbol de
Page 220 and 221: ORG instructionThat is, the ORG ins
Page 222 and 223: PRINT instructionPRINT instructionT
Page 224 and 225: PRINT instructionexceeded the macro
Page 226 and 227: PUNCH instructionv A pair of single
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REPRO instruction||Notes:1. The ide
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RSECT instructionThe beginning of a
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TITLE instructionv Provides heading
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TITLE instructionIf the TITLE state
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USING instructioninstructions suppo
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USING instructionby means of anothe
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USING instructionLabeled USING inst
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USING instructionDomain of a labele
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USING instructionIf the dependent U
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XATTR instructionXATTR instruction
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XATTR instructionSCOPE(MODULE), abb
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232 HLASM: V1R6 Language Ref
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Name entry . . . . . . . . . . . .
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Macro definitionA macro definition
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Macro instructionThe macro instruct
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Where to define a macro in a source
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Prototype statement|||||specified o
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Model statementsEach field or subfi
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Model statementsTable 37. Rules for
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Model statements||v Variable symbol
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Symbolic parametersPositionalKeywor
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Other conditional assembly instruct
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AREAD instruction||If no operand is
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MEXIT instructionThe MEXIT instruct
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System variable symbols1 macro2 get
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&SYSADATA_MEMBER System Variable Sy
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&SYSDATC System Variable SymbolYYYY
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&SYSECT System Variable Symbolv Sta
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&SYSIN_MEMBER System Variable Symbo
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&SYSLIB_DSN System Variable SymbolS
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&SYSLIN_DSN System Variable SymbolE
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&SYSLIST System Variable Symbolposi
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&SYSLOC System Variable Symbolinstr
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&SYSNDX System Variable Symbol1 MAC
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&SYSNDX System Variable SymbolState
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&SYSOPT_RENT System Variable Symbol
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&SYSPRINT_DSN System Variable Symbo
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&SYSPUNCH_DSN System Variable Symbo
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&SYSSEQF System Variable Symbol1. I
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&SYSTEM_ID System Variable SymbolNo
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&SYSTERM_VOLUME System Variable Sym
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&SYSVER System Variable Symbol294 H
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Macro instruction format|name_entry
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Macro instruction formatOperandYou
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Macro instruction formatAny keyword
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Macro instruction formatparameters
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Sublists in operandsTable 48. Relat
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Values in operandsUnquotedSpecial2.
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Values in operands’SPACES ALLOWED
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Levels of macro call nestingLevels
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Levels of macro call nestingCOMPAT(
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Levels of macro call nesting&SYSSEQ
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SET symbolsSET symbolsSET symbols a
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SET symbolsTable 50. Features of SE
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SET symbolspreceding 999999 element
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Data attributesTable 51. Data attri
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Data attributesThe values of attrib
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Data attributesV R-, V-type address
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Data attributes|||||||||Notes:1. Or
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Data attributesv If the first opera
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Data attributesCount attribute (K')
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Data attributes||||||defined attrib
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Sequence symbolsparameter wherever
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LookaheadSequencelater defined by O
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GBLA, GBLB, and GBLC instructionsGB
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LCLA, LCLB, and LCLC instructions,
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Assigning values to SET symbolsLogi
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Assigning values to SET symbolsTabl
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SETA instructionTable 58. Variable
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SETA instructionB2A(’’) has val
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SETA instruction|||||||||||||||||||
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SETA instructionAfter the following
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SETA instruction10. An arithmetic e
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SETA instructionarithmetic value
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SETB instructionv A logical express
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SETB instructionOR Format: Logical-
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SETC instructionSETCinstructionThe
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SETC instruction|LCLC &C1,&C2LCLC &
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Substring notationv When e2 has a v
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Substring notation||||ExamplesA2D(0
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Substring notationC2X Format: Funct
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Substring notationSuppose the SETC
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Substring notationX2C(’’) has v
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Substring notationFor example, eith
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Substring notationStatement 1 assig
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SETAF instruction►► variable_sy
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AIF instructionsequence_symbolis a
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AIF instructionAIFB—synonym of th
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ACTR instruction►►sequence_symb
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MHELP optionsparameters are dumped
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Assembler instructions and statemen
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Summary of constantsTable 65. Summa
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Macro and conditional assembly lang
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Standard character set code tableHe
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Standard character set code tableHe
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NoticesPURPOSE. Some states do not
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z/VM: CP Planning and Administratio
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ALIAS instruction 108maximum operan
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comment statements (continued)ordin
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GG-type graphic constant 144GBLA in
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macro instructions (continued)opera
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eference constant (R) 154reference
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UUHEADPRINT instruction 206unary op
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