Assembler Mnemonics

Mnemonic	Name	Notes
	DIAGNOSE	DM
A	ADD	RX C
AD	ADD NORMALIZED (long)	RX C
ADR	ADD NORMALIZED (long)	RR C
AE	ADD NORMALIZED (short)	RX C
AER	ADD NORMALIZED (short)	RR C
AH	ADD HALFWORD	RX C
AHI	ADD HALFWORD IMMEDIATE	RI C
AL	ADD LOGICAL	RX C
ALR	ADD LOGICAL	RR C
AP	ADD DECIMAL	SS C
AR	ADD	RR C
AU	ADD UNNORMALIZED (short)	RX C
AUR	ADD UNNORMALIZED (short)	RR C
AW	ADD UNNORMALIZED (long)	RX C
AWR	ADD UNNORMALIZED (long)	RR C
AXR	ADD NORMALIZED (extended)	RR C
BAKR	BRANCH AND STACK	RRE
BAL	BRANCH AND LINK	RX
BALR	BRANCH AND LINK	RR
BAS	BRANCH AND SAVE	RX
BASR	BRANCH AND SAVE	RR
BASSM	BRANCH AND SAVE AND SET MODE	RR
BC	BRANCH ON CONDITION	RX
BCR	BRANCH ON CONDITION	RR
BCT	BRANCH ON COUNT	RX
BCTR	BRANCH ON COUNT	RR
BRAS	BRANCH RELATIVE AND SAVE	RI
BRC	BRANCH RELATIVE ON CONDITION	RI
BRCT	BRANCH RELATIVE ON COUNT	RI
BRXH	BRANCH RELATIVE ON INDEX HIGH	RSI
BRXLE	BRANCH RELATIVE ON INDEX LESS or EQUAL	RSI
BSG	BRANCH IN SUBSPACE GROUP	RRE SG
BSM	BRANCH AND SET MODE	RR
BXH	BRANCH ON INDEX HIGH	RS
BXLE	BRANCH ON INDEX LOW or EQUAL	RS
C	COMPARE	RX C
CD	COMPARE (long)	RX C
CDR	COMPARE (long)	RR C
CDS	COMPARE DOUBLE AND SWAP	RS C
CE	COMPARE (short)	RX C
CER	COMPARE (short)	RR C
CFC	COMPARE AND FORM CODEWORD	S C
CH	COMPARE HALFWORD	RX C
CHI	COMPARE HALFWORD IMMEDIATE	RI C
CKSM	CHECKSUM	RRE C
CL	COMPARE LOGICAL	RX C
CLC	COMPARE LOGICAL (character)	SS C
CLCL	COMPARE LOGICAL LONG	RR C
CLI	COMPARE LOGICAL (immediate)	SI C
CLM	COMPARE LOGICAL C. UNDER MASK	RS C
CLR	COMPARE LOGICAL	RR C
CLST	COMPARE LOGICAL STRING	RRE C SR
CP	COMPARE DECIMAL	SS C
CPYA	COPY ACCESS	RRE
CR	COMPARE	RR C
CS	COMPARE AND SWAP	RS C
CSCH	CLEAR SUBCHANNEL	S C
CUSE	COMPARE UNTIL SUBSTRING EQUAL	RRE C
CVB	CONVERT TO BINARY	RX
CVD	CONVERT TO DECIMAL	RX
D	DIVIDE	RX
DD	DIVIDE (long)	RX
DDR	DIVIDE (long)	RR
DE	DIVIDE (short)	RX
DER	DIVIDE (short)	RR
DP	DIVIDE DECIMAL	SS
DR	DIVIDE	RR
DXR	DIVIDE (extended)	RRE
EAR	EXTRACT ACCESS	RRE
ED	EDIT	SS C
EDMK	EDIT AND MARK	SS C
EPAR	EXTRACT PRIMARY ASN	RRE
EREG	EXTRACT STACKED REGISTERS	RRE
ESAR	EXTRACT SECONDARY ASN	RRE
ESTA	EXTRACT STACKED STATE	RRE C
EX	EXECUTE	RX
HDR	HALVE (long)	RR
HER	HALVE (short)	RR
HSCH	HALT SUBCHANNEL	S C
IAC	INSERT ADDRESS SPACE CONTROL	RRE C
IC	INSERT CHARACTER	RX
ICM	INSERT CHARACTERS UNDER MASK	RS C
IPK	INSERT PSW KEY	S
IPM	INSERT PROGRAM MASK	RRE
IPTE	INVALIDATE PAGE TABLE ENTRY	RRE
ISKE	INSERT STORAGE KEY EXTENDED	RRE
IVSK	INSERT VIRTUAL STORAGE KEY	RRE
L	LOAD	RX
LA	LOAD ADDRESS	RX
LAE	LOAD ADDRESS EXTENDED	RX
LAM	LOAD ACCESS MULTIPLE	RS
LASP	LOAD ADDRESS SPACE PARAMETERS	SSE C
LCDR	LOAD COMPLEMENT (long)	RR C
LCER	LOAD COMPLEMENT (short)	RR C
LCR	LOAD COMPLEMENT	RR C
LCTL	LOAD CONTROL	RS
LD	LOAD (long)	RX
LDR	LOAD (long)	RR
LE	LOAD (short)	RX
LER	LOAD (short)	RR
LH	LOAD HALFWORD	RX
LHI	LOAD HALFWORD IMMEDIATE	RI
LM	LOAD MULTIPLE	RS
LNDR	LOAD NEGATIVE (long)	RR C
LNER	LOAD NEGATIVE (short)	RR C
LNR	LOAD NEGATIVE	RR C
LPDR	LOAD POSITIVE (long)	RR C
LPER	LOAD POSITIVE (short)	RR C
LPR	LOAD POSITIVE	RR C
LPSW	LOAD PSW	S L
LR	LOAD	RR
LRA	LOAD REAL ADDRESS	RX C
LRDR	LOAD ROUNDED (ext. to long)	RR
LRER	LOAD ROUNDED (long to short)	RR
LTDR	LOAD AND TEST (long)	RR C
LTER	LOAD AND TEST (short)	RR C
LTR	LOAD AND TEST	RR C
LURA	LOAD USING REAL ADDRESS	RRE
M	MULTIPLY	RX
MC	MONITOR CALL	SI
MD	MULTIPLY (long)	RX
MDR	MULTIPLY (long)	RR
ME	MULTIPLY (short to long)	RX
MER	MULTIPLY (short to long)	RR
MH	MULTIPLY HALFWORD	RX
MHI	MULTIPLY HALFWORD IMMEDIATE	RI
MP	MULTIPLY DECIMAL	SS
MR	MULTIPLY	RR
MSCH	MODIFY SUBCHANNEL	S C
MS	MULTIPLY SINGLE	RI
MSR	MULTIPLY SINGLE	RRE
MSTA	MODIFY STACKED STATE	RRE
MVC	MOVE (character)	SS
MVCDK	MOVE WITH DESTINATION KEY	SSE
MVCIN	MOVE INVERSE	SS MI
MVCK	MOVE WITH KEY	SS C
MVCL	MOVE LONG	RR C
MVCP	MOVE TO PRIMARY	SS C
MVCS	MOVE TO SECONDARY	SS C
MVCSK	MOVE WITH SOURCE KEY	SSE
MVI	MOVE (immediate)	SI
MVN	MOVE NUMERICS	SS
MVO	MOVE WITH OFFSET	SS
MVPG	MOVE PAGE	RRE C
MVST	MOVE STRING	RRE C SR
MVZ	MOVE ZONES	SS
MXD	MULTIPLY (long to extended)	RX
MXDR	MULTIPLY (long to extended)	RR
MXR	MULTIPLY (extended)	RR
N	AND	RX C
NC	AND (character)	SS C
NI	AND (immediate)	SI C
NR	AND	RR C
O	OR	RX C
OC	OR (character)	SS C
OI	OR (immediate)	SI C
OR	OR	RR C
PACK	PACK	SS
PALB	PURGE ALB	RRE
PC	PROGRAM CALL	S
PLO	PERFORM LOCKED OPERATION	SS C
PR	PROGRAM RETURN	E U
PT	PROGRAM TRANSFER	RRE
PTLB	PURGE TLB	S
RCHP	RESET CHANNEL PATH	S C
RRBE	RESET REFERENCE BIT EXTENDED	RRE C
RSCH	RESUME SUBCHANNEL	S C
S	SUBTRACT	RX C
SAC	SET ADDRESS SPACE CONTROL	S
SACF	SET ADDR. SPACE CONTROL FAST	S SA
SAL	SET ADDRESS LIMIT	S
SAR	SET ACCESS	RRE
SCHM	SET CHANNEL MONITOR	S
SCK	SET CLOCK	S C
SCKC	SET CLOCK COMPARATOR	S
SD	SUBTRACT NORMALIZED (long)	RX C
SDR	SUBTRACT NORMALIZED (long)	RR C
SE	SUBTRACT NORMALIZED (short)	RX C
SER	SUBTRACT NORMALIZED (short)	RR C
SH	SUBTRACT HALFWORD	RX C
SIGP	SIGNAL PROCESSOR	RS C
SL	SUBTRACT LOGICAL	RX C
SLA	SHIFT LEFT SINGLE	RS C
SLDA	SHIFT LEFT DOUBLE	RS C
SLDL	SHIFT LEFT DOUBLE LOGICAL	RS
SLL	SHIFT LEFT SINGLE LOGICAL	RS
SLR	SUBTRACT LOGICAL	RR C
SP	SUBTRACT DECIMAL	SS C
SPKA	SET PSW KEY FROM ADDRESS	S
SPM	SET PROGRAM MASK	RR L
SPT	SET CPU TIMER	S
SPX	SET PREFIX	S
SQDR	SQUARE ROOT (long)	RRE QR
SQER	SQUARE ROOT (short)	RRE QR
SR	SUBTRACT	RR C
SRA	SHIFT RIGHT SINGLE	RS C
SRDA	SHIFT RIGHT DOUBLE	RS C
SRDL	SHIFT RIGHT DOUBLE LOGICAL	RS
SRL	SHIFT RIGHT SINGLE LOGICAL	RS
SRP	SHIFT AND ROUND DECIMAL	SS C
SRST	SEARCH STRING	RRE C SR
SSAR	SET SECONDARY ASN	RRE
SSCH	START SUBCHANNEL	S C
SSKE	SET STORAGE KEY EXTENDED	RRE
SSM	SET SYSTEM MASK	S
ST	STORE	RX
STAM	STORE ACCESS MULTIPLE	RS
STAP	STORE CPU ADDRESS	S
STC	STORE CHARACTER	RX
STCK	STORE CLOCK	S C
STCKC	STORE CLOCK COMPARATOR	S
STCKE	STORE CLOCK EXTENDED	S C
STCM	STORE CHARACTERS UNDER MASK	RS
STCPS	STORE CHANNEL PATH STATUS	S
STCRW	STORE CHANNEL REPORT WORD	S C
STCTL	STORE CONTROL	RS
STD	STORE (long)	RX
STE	STORE (short)	RX
STH	STORE HALFWORD	RX
STIDP	STORE CPU ID	S
STM	STORE MULTIPLE	RS
STNSM	STORE THEN AND SYSTEM MASK	SI
STOSM	STORE THEN OR SYSTEM MASK	SI
STPT	STORE CPU TIMER	S
STPX	STORE PREFIX	S
STSCH	STORE SUBCHANNEL	S C
STSI	STORE SYSTEM INFORMATION	S C
STURA	STORE USING REAL ADDRESS	RRE
SU	SUBTRACT UNNORMALIZED (short)	RX C
SUR	SUBTRACT UNNORMALIZED (short)	RR C
SVC	SUPERVISOR CALL	RR
SW	SUBTRACT UNNORMALIZED (long)	RX C
SWR	SUBTRACT UNNORMALIZED (long)	RR C
SXR	SUBTRACT NORMALIZED (ext.)	RR C
TAR	TEST ACCESS	RRE C
TB	TEST BLOCK	RRE C
TM	TEST UNDER MASK	SI C
TMH	TEST UNDER MASK HIGH	RI C
TML	TEST UNDER MASK LOW	RI C
TPI	TEST PENDING INTERRUPTION	S C
TPROT	TEST PROTECTION	SSE C
TR	TRANSLATE	SS
TRACE	TRACE	RS
TRT	TRANSLATE AND TEST	SS C
TS	TEST AND SET	S C
TSCH	TEST SUBCHANNEL	S C
UNPK	UNPACK	SS
UPT	UPDATE TREE	E C
X	EXCLUSIVE OR	RX C
XC	EXCLUSIVE OR (character)	SS C
XI	EXCLUSIVE OR (immediate)	SI C
XR	EXCLUSIVE OR	RR C
ZAP	ZERO AND ADD	SS C

C = Condition code is set.
DM = Depending on the model, DIAGNOSE may generate various program exceptions and may change the condition code.
E = E instruction format.
L = New condition code is loaded.
MI = Move-inverse facility.
QR = Square-root facility.
RR = RR instruction format.
RRE = RRE instruction format.
RS = RS instruction format.
RX = RX instruction format.
S = S instruction format.
SA = Set-address-space-control-fast facility.
SG = Subspace-group facility.
SI = SI instruction format.
SR = String-instruction facility.
SS = SS instruction format.
SSE = SSE instruction format.
U = Condition code is unpredictable.