IBM System/360 Field Engineering Manual

6l
Subtract
5B RX Rl, D2(X2, B2)
Subtract opr 2 from opr 1 and place the Adr 0 Dif = 0
:::: difference into opr 1
Spec Dif < 0
()
Exp Oflo Dif > 0
0
3 Overflow
z
~
Subtract
SR
1B
RR
Rl,R2 Subtract opr 2 from opr l;
Exp Oflo 0
Dif "'° 0
trl
difference placed into opr 1. 1 Dif < 0
z
Dif > 0
"1
Overflow
)>
Subtract Decimal SP FB SS Dl(Ll, Bl), Subtract dee opr 2 from opr l;
Prot
0 Dif = 0
I:""'
D2(L2, B2) difference stored into opr 1.
Adr 1 Dif < 0
(Right to left
byte by byte) (Both opr's must
Data 2 Dif > 0
b::: ir:. pa:::kc:d fo:rT...at) (Field~ ~aP. c:verl3.p if
Dec Vflo
J Overflow
low-order bytes coincide)
Subtract Halfword
SH 4B RX Rl, D2(X2, B2)
Subtract opr 2 from opr 1 ;
Adr 0 Dif = 0
difference placed into opr 1. Spec
1 Dif < 0
(Opr 2 hi-order 16 bits expanded) Exp Oflo 2 Dif > 0
Overflow
Subtract Logical
SL 5F RX Rl, D2(X2, B2) Subtract opr 2 from opr 1 ;
Adr
difference placed into opr 1.
Spec
Di!"' 0
Dif"" 0
3
Di! I" 0
Subtract Logical
SLR
lF RR Rl,R2 Subtract opr 2 from opr 1 ;
None
difference placed into opr 1.
1
Di! F 0
Dif"" 0
Di!~ 0
Subtract Normalized
NSD 6B RX Rl, D2(X2, B2) FP. Subtract opr 2 from opr 1 and Adr Result
~
(Long) the difference placed into opr 1.
Spec 0 Fract = 0
"'
(The sign of opr 2 is inverted before the Sign 1 Result < 0
"'
addition.)
Exp Oflo 2
Result > 0
0
Exp Uflo 3 Exp Oflo
~

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English