HLASM Language Reference

DC Instruction
Further information about these constants is provided in the discussion of the
constants themselves under “Subfield 6: Nominal Value” on page 140.
Figure 35. Type Codes for Constants
Code Constant Type Machine Format
C Character 8-bit code for each character
G Graphic 16-bit code for each character
X Hexadecimal 4-bit code for each hexadecimal digit
B Binary Binary format
F Fixed-point Signed, fixed-point binary format; normally a fullword
H Fixed-point Signed, fixed-point binary format; normally a halfword
E Floating-point Short floating-point format; normally a fullword
D Floating-point Long floating-point format; normally a doubleword
L Floating-point Extended floating-point format; normally two doublewords
P Decimal Packed decimal format
Z Decimal Zoned decimal format
A Address Value of address; normally a fullword
Y Address Value of address; normally a halfword
S Address Base register and displacement value; a halfword
V Address Space reserved for external symbol addresses; normally a
fullword
J Address Space reserved for length of class or DXD; normally a
fullword
Q Address Space reserved for external dummy section offset
R Address Space reserved for PSECT addresses; normally a fullword
The type in conjunction with an optional type extension specification indicates to the
assembler:
1. How to assemble the nominal value(s) specified in subfield 6; that is, which
binary representation or machine format the object code of the constant must
have.
2. At what boundary the assembler aligns the constant, if no length modifier is
present.
3. How much storage the constant occupies, according to the implicit length of the
constant, if no explicit length modifier is present (for details, see “Padding and
Truncation of Values” on page 130).
Subfield 3: Type Extension
The syntax for coding the type extension is shown in the subfield format on page
127.
You may omit the type extension subfield. If specified, the assembler, using this
field in conjunction with the type subfield, determines how to interpret the constant
and translate it into the correct format. The type extension is specified by a
single-letter code as shown in Figure 36.
134 HLASM V1R5 Language Reference