IBM System/360

Operation Mnemonic Op Code Format Operands
Description
Interruptions
Cond Code
Insert Character IC 43 RX Rl, D2(X2, B2)
Opr 2's char placed into opr l, 24-31
Adr Unchanged
(High-order bits unchanged)
Insert Storage Key
!SK 09
RR Rl,R2 Opr 2, 8-20 fetches sto key byte. Privileged Unchanged
This byte is placed in opr l, 24-27.
Oper
(opr 2, 0-7 and 21-27 ignored, 28-31
Adr
must= 0) Spec
Load
L
58
RX R1,D2(X2,B2) Load opr 2 into opr 1 Spec Unchanged
Adr
Load
LR 18 RR Rl,R2
Opr 2 into opr 1 None Unchanged
Load Address LA 41 RX Rl, D2(X2, B2) Opr 2, 12-31 to opr 1, 8-31. None Unchanged
Opr 1, 0-7 set to zero
(no storage reference made)
Load and Test LTR 12 RR Rl,R2 Opr 2 into opr 1 None
0
Result= 0
(When opr 1 = opr 2: same as LTDR) 1 Result < 0
2 Result > O
Load and Test (Long) LTDR
22
RR
Rl,R2
Opr 2 into opr 1 Spec Result
(FPR) (FPR)
0
Fract = 0
(When opr 1 and opr 2 specify same reg 1 Result < 0
result is test without data transfer. ) 2 Result > 0
Load and Test (Short) LTER 32 RR Rl,R2 Opr 2 into opr 1 Spec Result
(FPR) (FPR) 0 Fract = 0
(Low-order half of opr 1 unchanged) 1 Result< 0
(When opr 1 = opr 2: same as LTDR) 2 Result > 0
Load Complement
LCR 13 RR Rl,R2 2's complement of opr 2 into opr 1
Exp Oflo
0
Result= O
(overflow when max negative number is 1 Result < 0
complemented)
2
Result > 0
3 Overflow