To summarize,
Whether using base-displacement or relative branches, the three test
programs being discussed are, in effect:
(branch never taken, best)
TEST CSECT
LLILF 4,1000*1000*1000
LTR 4,4
NEXT JNP NEXT1
NEXT1 JCT 4,NEXT
BR 14
END TEST
and (conditional branch, always taken, worst)
TEST CSECT
LLILF 4,1000*1000*1000
LTR 4,4
NEXT JP NEXT1
NEXT1 JCT 4,NEXT
BR 14
END TEST
and (unconditional branch, always taken, middle)
TEST CSECT
LLILF 4,1000*1000*1000
LTR 4,4
NEXT J NEXT1
NEXT1 JCT 4,NEXT
BR 14
END TEST
Peter Relson
z/OS Core Technology Design
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