Branch Mnemonic Opcodes  Assembler Branch Instructions http://www.simotime.com  Copyright © 1987-2010 SimoTime Enterprises All Rights Reserved

Introduction
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This document provides a summary of the extended mnemonic opcodes for branch instructions. This program may serve as a tutorial for programmers that are new to 370 assembler or as a reference for experienced programmers. In the following tables the leftmost three columns show the mnemonic with the operands and a brief description. The rightmost three columns show the instruction format, the actual mnemonic opcode and the mask and addressing format that is generated from the extended mnemonic.

Notes: D2=displacement, X2=index register, B2=base register, R2=register containing branch address

Unconditional or No Branch
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The following mnemonic opcodes are used for an Unconditional Branch or No Branch.

Branch After Compare Instruction
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The following mnemonic opcodes are used after Compare Instructions.

Branch After Arithmetic Instruction
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The following mnemonic opcodes are used after Arithmetic Instructions.

Branch After Test Under Mask Instruction
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The following mnemonic opcodes are used after Test Under Mask Instructions.

Summary
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The purpose of this document is to assist as a tutorial for new programmers or as a quick reference for experienced programmers. These reference documents are made available on an "as-is" basis and may be downloaded, copied and modified for specific situations as long as the copyright information is not removed or changed. As always, it is the programmer's responsibility to thoroughly test all programs and review all documentation.

Similar Points of Interest
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Check out  The Assembler Connection  for more examples of mainframe Assembler coding techniques and sample code.

Comments or Suggestions
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If you have any questions, suggestions or comments please call or send an e-mail to: helpdesk@simotime.com

About SimoTime Enterprises
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Founded in 1987, SimoTime Enterprises is a privately owned company. We specialize in the creation and deployment of business applications using new or existing technologies and services. We have a team of individuals that understand the broad range of technologies being used in today's environments. This includes the smallest thin client using the Internet and the very large mainframe systems. There is more to making the Internet work for your company's business than just having a nice looking WEB site. It is about combining the latest technologies and existing technologies with practical business experience. It's about the business of doing business and looking good in the process. Quite often, to reach larger markets or provide a higher level of service to existing customers it requires the newer Internet technologies to work in a complementary manner with existing corporate mainframe systems. Whether you want to use the Internet to expand into new market segments or as a delivery vehicle for existing business functions simply give us a call or check the web site at http://www.simotime.com