IBM System/370

CONDITION CODES
Condition Code Setting
0 1
Mask Bit Vlllue 8 4
o.r..llnstructi_
Add, Add Halfword
zero <zero
>zero
.owrflow
Add Logical
zer~
not_o,
zero,
not zero,
no carry no carry
carry
carry
AND
_0
not_o
Compare, Compare Halfword equal
1st op low
1st op high
-
Compare and Swap/Double equal
not equal
Compare Logical
equal
1st op low
1st op high
-
ExclusiwOR
zero not zero
I nsert Characters under Mask all zero
htbitone 1st bit zero
-
Load and Test
<zero
>zero
Load Complement
<zero
>zero overflow
Load Negative
<zero
Load Positive
zero
>zero. overflow
Move Long
count equal
count low· count high
OII8rlap
OR
not zero
Shift Left DoublelSingie zero
<zero >zero
owrflow
Shift Right Double/Single
~ero
<zero
>zero
Store Clock set not set
error not oper
Subtract, Subtract Halfword <zero
>zero overflow
Subtract Logical not zero,
zero,
not zero,
no carry
carry
carry
Test and Set
Test
uqder Mask mixed
Translate and Test incomplete
complete
Decl ..... Instructi_
Add Decimal
zero <zero
>zsro
OIIerflow
Compare Decimal
equal
lst op low ht op high
-
Edit, Edit and Mark zero
<zero >zeru
Shift and Round Decimal
zero
<zero >zero overflow
Subtract Decirnel
zero <zero >zero
CM:rflow
Zero and Add
zero <zero >zero overflow
Floating-Point lnetructi_
Add Normalized <zero >zero
Add Unnormalized zero <zero >zero
Comoere
equal
1st op low ht op high
-
Load and Test <zero >zero
Load Complement
<zero >zero
Load
Negative <zero
Load Positive
>zero
Subtract Normalized
<zero
>zero
Subtract Unnormalized
<zero
>zero
I nput/OutpUt I nltructio ..
Clear I/O
no oper in
CSWstored
chan busy
not oper
progress
Halt Device
interruption CSW stored
channel
not oper
pending
working
Halt I/O
interruption CSW stored
burstop not oper
pending
stopped
Start 1/0, SIOF successful CSWstored
busy not oper
Store Channel I D
ID stored CSW stored
busy not oper
Test
Channel lMIilable
interruption burst mode not oper
pending
Test I/O available CSWstored
busy not oper
Syst .... Control I nstructi_
Load Real Address
lranslation
STenlry
PTentry length
lMIilable
invalid
invalid violation
Reset Reference Bit
R=O, C=OI
RzO,C=l
R=I, C=O I
R=l, C=1
Set Clock
set
secure
notoper
Signal Processor
accepted
slat stored
busy
not oper
CNOP ALIGNMENT
DOUBLEWORD
WORD
WORD
HALFWORD
I
HALFWORD HALFWORD HALFWORD
BYTE. BYTE
BYTE BYTE
BYTE
, BYTE
BYTE
' BYTE
~
~
~ ~
0,8
2,8
4,8
6,8
Page 2-4