HLASM Language Reference

DC Instruction
duplication_factor
causes the nominal_value to be generated the number of times indicated by
this factor. See “Subfield 1: Duplication Factor” on page 132.
type
further determines the type of constant the nominal_value represents. See
“Subfield 2: Type” on page 133.
type_extension
determines some of the characteristics of the constant. See “Subfield 3: Type
Extension” on page 134.
| program_type
| assign a programmer determined 32-bit value to the symbol naming the DC
| instruction, if a symbol was present. See “Subfield 4: Program type” on
| page 135.
modifier
describes the length, the scaling, and the exponent of the nominal_value. See
“Subfield 5: Modifier” on page 136.
nominal_value
defines the value of the constant. See “Subfield 6: Nominal Value” on
page 140.
For example, in:
1EBP(7)L2'12'
the six subfields are:
Duplication factor is 1
Type is E
Type extension is B
| Program type is P(7)
Modifier is L2
Nominal value is 12
If all subfields are specified, the order given above is required. The first, third,
fourth and fifth subfields can be omitted, but the second and sixth must be
specified in that order.
Rules for DC Operand
1. The type subfield and the nominal value must always be specified unless the
duplication factor is zero. If the duplication factor is zero, only the type must be
specified.
| 2. The duplication factor, type extension, program type, and modifier subfields are
optional.
3. When multiple operands are specified, they can be of different types.
4. When multiple nominal values are specified in the sixth subfield, they must be
separated by commas and be of the same type. Multiple nominal values are
not allowed for character or graphic constants.
| 5. The descriptive subfields, apart from the program type, apply to all the nominal
| values. The program type applies to only the symbol naming the DC
| instruction, if a symbol was present. Separate constants are generated for
each separate operand and nominal value specified.
128 HLASM V1R5 Language Reference