Assembler Instructions; Summary Of Constants - IBM System/370 Operator's Reference Manual

ASSEMBLER INSTRUCTIONSt
Function
Mnemonic ..... ng
Data definition
DC
Define constant
OS
Define storage
CCW
Define channel command word
Prowam
START
Start3S$l!mbly
sectioning
CSECT
Identify control section
and
linking
OSECT
Identify dummy section
OXO- Define external dummy section
CXO- Cumulative length of external dummy section
COM Identify blank common control section
ENTRY
Identify entry-point symbol
EXTRN
Identify extemal symbol
WXTRN Identify weak external symbol
Base register USING Use base address register
assignment DROP Drop base address register
Control
of
listings TITLE
Identify 3S$I!mbly output
EJECT Start new page
SPACE Space
listing
PRINT Print optional data
Program Control ICTL
Input format control
ISEO
Input sequence checking
PUNCH Punch a card
REPRO
Reproduce following card
ORG Set location counter
EOU
Equate symbol
OPSYN- Equate operation code
PUSH-
Save current PRINT or USING status
POP-
Restore
~RINT
or USING status
LTORG
Begin literal
pool
CNOP Conditional no operation
COpy
Copy predefined source coding
END End assembly
Macro definition MACRO Macro definition header
MNOTE
Request for error message
MEXIT
Macro definition exit
MEND Macro definition trailer
Conditional ACTR
Conditional assembly loop counter
assembly AGO
Unconditional branch
AIF Conditional branch
ANOP Assembly no operation
GBLA
Define global SETA symbol
GBLB
Define global SETB symbol
GBLC
Define global SETC symbol
LCLA
Define local SETA symbol
LCLB Define local SETB symbol
LCLC
Define local SETC symbol
SETA
Set arithmetic variable symbol
SETB
Set binary variable symbol
SETC
Set character variable symbol
SUMMARY OF CONSTANTSt
I . . UED
LENGTH.
TYPE
BYTES
ALIGNMENT FORMAT
C
-
byte characters
X
-
byte
hexadecimal digits
B
-
byte
binary digits
F
4 word
fixed-point binary
H 2
halfword
fixed-point binary
E 4 word
short floatinQ1>Oint
0 8 doubleword
long floating-point
L
16
doubleword
extended floating-point
P
-
byte
packed decimal
Z
-
byte
zoned
decimal
A
4
word value of address
Y 2 halfword value of address
S
2
halfword address in base-<lispIaoement form
V
4
word externally defined address value
0-
4
word symbol naming a OXO or OSECT
tFor
OS/VS and DOSJV5,
source:
GC33-4010.
*05/VS only.
TRUNCA·
TlONI
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