Is there any really difference between a BNE and a JNE
? Scott ford www.identityforge.com On Aug 24, 2012, at 2:55 PM, Randy Schafer <randy.schafer.a...@statefarm.com> wrote: > Oops. > > I meant: CLI 0(R3),X'00' > > > > -----Original Message----- > From: Randy Schafer > Sent: Friday, August 24, 2012 1:54 PM > To: 'IBM Mainframe Assembler List' > Subject: RE: which instructions should I use? > > I probably would have used: > > CLI 0(1,R3),X'00' > JNE ... > > No literal. > > > -----Original Message----- > From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] > On Behalf Of Frank Swarbrick > Sent: Friday, August 24, 2012 1:48 PM > To: ASSEMBLER-LIST@LISTSERV.UGA.EDU > 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
