Ed, The PoP says for the Vector String instructions that "For all instructions that optionally set the condition code, performance may be degraded if the condition code is set."
Have you found that performance can be significantly (or at all) improved by not setting the CC in the SIMD instruction and just always extracting the seventh byte of operand 1 to see what is the resulting index value in a regular GR? Peter -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Ed Jaffe Sent: Saturday, June 16, 2018 4:24 PM To: [email protected] Subject: Re: Count Words? EXTERNAL EMAIL On 6/16/2018 12:15 PM, Paul Gilmartin wrote: > > I stand corrected. Thanks. > > This architecture has grown beyond human ken. Let the compiler do it, and > hope the compiler author gets it right. It's still understandable and VERY usable in hand-written code for real HLASM programmers. It just takes the kind of "mettle" we had back in the day when we read PoOps cover to cover over and over and over again. Don't give up! You can do it... -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system.
