HLASM Language Reference

DC Instruction
Figure 34. Alignment of Constants
Type of
constant
Implicit
Boundary
Alignment
Examples
B byte DC B'111' byte
C
CU
byte
byte
DC C'Character string'
DC CU'Character string'
Boundary
Alignment
byte
byte
G byte DC G' byte
X byte DC X'22221222' byte
H
F
FD
P
Z
halfword
fullword
doubleword
byte
byte
DC H'25'
DC HL3'25'
DC F'225'
DC FL7'225'
DC FD'225'
DC P'2934'
DC Z'1235'
DC ZL2'1235'
E
D
L
fullword
doubleword
doubleword
DC E'1.25'
DC EL5'1.25'
DC 8D'95'
DC 8DL7'95'
DC L'2.57E65'
| LQ
quadword DC LQ'.1'
Y
A
AD
S
| VD
J
| JD
Q
| QD
R
| RD
V
halfword
fullword
doubleword
halfword
fullword
doubleword
fullword
doubleword
fullword
doubleword
fullword
doubleword
DC Y(HERE)
DC AL1(THERE)
DC AD(WHERE)
DC S(LABEL)
DC SL2(LABEL)
DC V(EXTERNAL)
DC VL3(EXTERNAL)
DC VD(BIGOTHER)
DC J(CLASS)
DC JD(LARGECLASS)
DC QL1(DUMMY)
DC QD(BIGDUMMY)
DC R(APSECT)
DC RD(BPSECT)
Note:
1. Depends on whether or not an explicit length is specified in the constant.
halfword
byte
fullword
byte
doubleword
byte
byte
byte
fullword
byte
doubleword
byte
doubleword
quadword
halfword
byte
doubleword
halfword
byte
fullword
byte
doubleword
fullword
doubleword
byte
doubleword
fullword
doubleword
The padding and truncation rules discussed below apply to single nominal values.
Padding
If more space is specified than is needed to accommodate the binary
representation of the nominal value, the extra space is padded:
With binary zeros on the left for the binary (B), hexadecimal (X), fixed-point
(H,F), packed decimal (P), and all address (A,Y,S,V,J,Q,R) constants
With sign extension for constants that support sign extension of the nominal
value (H, F, Y, A), as described in Figure 42 on page 149.
With EBCDIC zeros on the left (X'F0') for the zoned decimal (Z) constants
Chapter 5. Assembler Instruction Statements 131