I'm wondering if the following is a good idea. I've been reading again. If I
have a routine which does the following:
...
CALL MYSUB,(PARMS,...),VL
L R13,4(,R13)
RETURN (14,12),T,RC=(15)
and I'm using standard calling conventions and save areas, is there any reason
why I shouldn't just:
L R13,4(,R13)
LM R14,R12,12(R13)
CALL MYSUB,(PARAMS,...),LINKOP='15,15',LINKINST=BCR,VL
The above call replaces the normal BALR 14,15 with BCR 15,15 and so goes to
MYSUB, but removes the current program from the savearea chain. OK, so
effectively it only saves one branch instruction. I guess I'm "over optimizing"
again.
This is almost like doing an XCTL instead of a LINK followed by a RETURN.
John McKown
Systems Engineer IV
IT
Administrative Services Group
HealthMarkets(r)
9151 Boulevard 26 * N. Richland Hills * TX 76010
(817) 255-3225 phone *
[email protected] * www.HealthMarkets.com
Confidentiality Notice: This e-mail message may contain confidential or
proprietary information. If you are not the intended recipient, please contact
the sender by reply e-mail and destroy all copies of the original message.
HealthMarkets(r) is the brand name for products underwritten and issued by the
insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance
Company(r), Mid-West National Life Insurance Company of TennesseeSM and The
MEGA Life and Health Insurance Company.SM
