I probably would have used:
CLI 0(1,R3),X'00'
JNE ...
No literal.
-----Original Message-----
From: IBM Mainframe Assembler List [mailto:[email protected]] On
Behalf Of Frank Swarbrick
Sent: Friday, August 24, 2012 1:48 PM
To: [email protected]
Subject: which instructions should I use?
Assembler newbie here; please be gentle.
Given the following:
- r7 points to the input parm list
- r2 indexes the input parm list
I want to see if the first byte of the parm I am interested in is x'00'.
l r3,0(r2,r7) r3 -> current parm
I can do this:
clc 0(1,r3),=x'00'
jne delimited_string
Or I can do this:
llc r9,0(,r3) r9 = parm byte 0
clijne r9,x'00',delimited_string
How do I decide which is better?
The second one uses "more modern" instructions, and 1 extra byte, but no
literal.
Frank
