IBM System/360 Field Engineering Manual

~
w
"'
0
Branch on Condition
Branch on Count
Branch on Count
Branch on Index High
Ili'ilii.d.1. uu I.t1dex
Low or ~ual
Compare
Compare
Compare Decimal
Compare Halfword
BCR
BCT
BCTR
BXH
BXLE
c
CR
CP
CH
07
RR
Ml,R2
46 RX Rl, D2(X2, B2)
06 RR Rl,R2
86 RS Rl, R3, D2(B2)
87 RS .tu, .tt3, D2(B2J
59 RX ~l, D2(X2, B2)
19 RR Rl,R2
F9
SS
Dl(Ll, Bl), D2(L2, B2)
49 RX Rl,D2(X2,B2)
Compare opr 1 with cond code
None Unchanged
Branch to opr 2 adr if cond met
(If opr 2 ° 0) NOP
Reduce opr 1 by 1 and branch to opr 2 adr None Unchanged
(If~ 1 ° 1) Reduce •Branch
Reduce opr 1 by 6 and branch to opr 2 adr
None
Unch&nged
(If opr 2 = 0) Reduce • Branch
Add opr 3 to opr 1 None Unchanged
Sum compared to opr 3 if opr 3 adr is odd
Sum c01npared to opr 3 = 1 if opr 3 adr is
even
Branch to opr 2 adr if sum~ 3/opr 3+1
----
- rl
Same as Branch On Index High Non~ Unchanged
Branch to~ 2 adr if sum 22.!' 3/opr 3+1
Compare opr 1 algebraically to opr 3 (GPR) Adr
0 opr's =
Spec 1
1st <
2
1st >
Compare opr 1 algebraically to opr 2
None
0
opr's =
1 1st <
2 1st >
Compare opr 1 to opr 2 Adr
0
opr's -
(binary right to left) byte by byte
Data
1 !st <
(Opr's must be packed) 2
1st >
(Fields can overlap if low-order bytes
coincide)
(The shorter opr is extended with high-order
zeros)
Compare opr 1 algebraically to opr 2 Adr
0
opr's =
(Hi-order 16 bits expanded) opr 2
Spec
1 1st <
2 1st >

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English