Branch Mnemonic Opcodes
Assembler Branch Instructions
  Table of Contents  v-24.01.01 - asmbch01.htm 
  Introduction
  Unconditional or No Branch
  Branch After Compare Instruction
  Branch After Arithmetic Instruction
  Branch After Test Under Mask
  Summary
  Software Agreement and Disclaimer
  Downloads and Links
  Current Server or Internet Access
  Internet Access Required
  Glossary of Terms
  Contact or Feedback
  Company Overview
The SimoTime Home Page 

Table of Contents Previous Section Next Section Introduction

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.

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


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SimoTime Technologies and Services
All Rights Reserved

Table of Contents Previous Section Next Section Unconditional or No Branch

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

Mnemonic  Operands   Description  Format  Opcode  Mask/Operands 
           
B D2(X2,B2) Unconditional Branch  RX BC 15,D2(X2,B2)
BR R2   RR BCR 15,R2
NOP D2(X2,B2) No Operation RX BC 0,D2(X2,B2)
NOPR R2   RR BCR 0,R2

 

Table of Contents Previous Section Next Section Branch After Compare Instruction

The following mnemonic opcodes are used after Compare Instructions.

Mnemonic  Operands   Description  Format  Opcode  Mask/Operands 
           
BH D2(X2,B2) Branch on High  RX BC 2,D2(X2,B2)
BHR R2   RR BCR 2,R2
BL D2(X2,B2) Branch on Low  RX BC 4,D2(X2,B2)
BLR R2   RR BCR 4,R2
BE D2(X2,B2) Branch on Equal  RX BC 8,D2(X2,B2)
BER R2   RR BCR 8,R2
BNH D2(X2,B2) Branch on Not High  RX BC 13,D2(X2,B2)
BNHR R2   RR BCR 13,R2
BNL D2(X2,B2) Branch on Not Low  RX BC 11,D2(X2,B2)
BNLR R2   RR BCR 11,R2
BNE D2(X2,B2) Branch on Not Equal   RX BC 7,D2(X2,B2)
BNER R2   RR BCR 7,R2

 

Table of Contents Previous Section Next Section Branch After Arithmetic Instruction

The following mnemonic opcodes are used after Arithmetic Instructions.

Mnemonic  Operands   Description  Format  Opcode  Mask/Operands 
           
BP D2(X2,B2) Branch on Plus  RX BC 2,D2(X2,B2)
BPR R2   RR BCR 2,R2
BM D2(X2,B2) Branch on Minus  RX BC 4,D2(X2,B2)
BMR R2   RR BCR 4,R2
BZ D2(X2,B2) Branch on Zero  RX BC 8,D2(X2,B2)
BZR R2   RR BCR 8,R2
BO D2(X2,B2) Branch on Overflow  RX BC 1,D2(X2,B2)
BOR R2   RR BCR 1,R2
BNP D2(X2,B2) Branch on Not Plus  RX BC 13,D2(X2,B2)
BNPR R2   RR BCR 13,R2
BNM D2(X2,B2) Branch on Not Minus  RX BC 11,D2(X2,B2)
BNMR R2   RR BCR 11,R2
BNZ D2(X2,B2) Branch on Not Zero  RX BC 7,D2(X2,B2)
BNZR R2   RR BCR 7,R2
BNO D2(X2,B2) Branch on No Overflow   RX BC 14,D2(X2,B2)
BNOR R2   RR BCR 14,R2

 

Table of Contents Previous Section Next Section Branch After Test Under Mask

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

Mnemonic  Operands   Description  Format  Opcode  Mask/Operands 
           
BO D2(X2,B2) Branch if Ones  RX BC 1,D2(X2,B2)
BOR R2   RR BCR 1,R2
BM D2(X2,B2) Branch if Mixed  RX BC 4,D2(X2,B2)
BMR R2   RR BCR 4,R2
BZ D2(X2,B2) Branch if Zero  RX BC 8,D2(X2,B2)
BZR R2   RR BCR 8,R2
BNO D2(X2,B2) Branch if Not Ones  RX BC 14,D2(X2,B2)
BNOR R2   RR BCR 14,R2
BNM D2(X2,B2) Branch if Not Mixed    RX BC 11,D2(X2,B2)
BNMR R2   RR BCR 11,R2
BNZ D2(X2,B2) Branch if Not Zero  RX BC 7,D2(X2,B2)
BNZR R2   RR BCR 7,R2

 

Table of Contents Previous Section Next Section Summary

This document provides a summary of the extended mnemonic opcodes for branch instructions. This document may be used to assist as a tutorial for new programmers or as a quick reference for experienced programmers.

In the world of programming there are many ways to solve a problem. This documentation and software were developed and tested on systems that are configured for a SIMOTIME environment based on the hardware, operating systems, user requirements and security requirements. Therefore, adjustments may be needed to execute the jobs and programs when transferred to a system of a different architecture or configuration.

SIMOTIME Services has experience in moving or sharing data or application processing across a variety of systems. For additional information about SIMOTIME Services or Technologies please contact us using the information in the  Contact or Feedback  section of this document.

Table of Contents Previous Section Next Section Software Agreement and Disclaimer

Permission to use, copy, modify and distribute this software, documentation or training material for any purpose requires a fee to be paid to SimoTime Technologies. Once the fee is received by SimoTime the latest version of the software, documentation or training material will be delivered and a license will be granted for use within an enterprise, provided the SimoTime copyright notice appear on all copies of the software. The SimoTime name or Logo may not be used in any advertising or publicity pertaining to the use of the software without the written permission of SimoTime Technologies.

SimoTime Technologies makes no warranty or representations about the suitability of the software, documentation or learning material for any purpose. It is provided "AS IS" without any expressed or implied warranty, including the implied warranties of merchantability, fitness for a particular purpose and non-infringement. SimoTime Technologies shall not be liable for any direct, indirect, special or consequential damages resulting from the loss of use, data or projects, whether in an action of contract or tort, arising out of or in connection with the use or performance of this software, documentation or training material.

Table of Contents Previous Section Next Section Downloads and Links

This section includes links to documents with additional information that are beyond the scope and purpose of this document. The first group of documents may be available from a local system or via an internet connection, the second group of documents will require an internet connection.

Note: A SimoTime License is required for the items to be made available on a local system or server.

Table of Contents Previous Section Next Section Current Server or Internet Access

The following links may be to the current server or to the Internet.

Note: The latest versions of the SimoTime Documents and Program Suites are available on the Internet and may be accessed using the Link to Internet icon. If a user has a SimoTime Enterprise License the Documents and Program Suites may be available on a local server and accessed using the Link to Server icon.

Link to Internet   Link to Server   Explore the Assembler Connection for more examples of mainframe Assembler programming techniques and sample code.

Link to Internet   Link to Server   Explore An Enterprise System Model that describes and demonstrates how Applications that were running on a Mainframe System and non-relational data that was located on the Mainframe System were copied and deployed in a Microsoft Windows environment with Micro Focus Enterprise Server.

Link to Internet   Link to Server   Explore The ASCII and EBCDIC Translation Tables. These tables are provided for individuals that need to better understand the bit structures and differences of the encoding formats.

Link to Internet   Link to Server   Explore The File Status Return Codes that are used to interpret the results of accessing VSAM data sets and/or QSAM files.

Table of Contents Previous Section Next Section Internet Access Required

The following links will require an internet connect.

A good place to start is The SimoTime Home Page for access to white papers, program examples and product information. This link requires an Internet Connection

Explore The Micro Focus Web Site for more information about products (including Micro Focus COBOL) and services available from Micro Focus. This link requires an Internet Connection.

Table of Contents Previous Section Next Section Glossary of Terms

Link to Internet   Link to Server   Explore the Glossary of Terms for a list of terms and definitions used in this suite of documents and white papers.

Table of Contents Previous Section Next Section Contact or Feedback

This document was created and is maintained by SimoTime Technologies. If you have any questions, suggestions, comments or feedback please use the following contact information.

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Table of Contents Previous Section Next Section Company Overview

SimoTime Technologies was founded in 1987 and 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. Our customers include small businesses using Internet technologies to corporations using very large mainframe systems.

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. We specialize in preparing applications and the associated data that are currently residing on a single platform to be distributed across a variety of platforms.

Preparing the application programs will require the transfer of source members that will be compiled and deployed on the target platform. The data will need to be transferred between the systems and may need to be converted and validated at various stages within the process. SimoTime has the technology, services and experience to assist in the application and data management tasks involved with doing business in a multi-system environment.

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


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Branch Instructions - Extended Mnemonic Opcodes
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