IBM C20-1641-1 Core Requirements for 1130 FORTRAN free download

File name C20-1641-1_Core_Requirements_for_1130_FORTRAN.pdf

C20-1641-1 IBM Data PrDcessing Techniques Core Requirements for 1130 FORTRAN This manual provides information and techniques necessary to evaluate problems in terms of the approximate amount of 1130 object code required for legitimate FORTRAN source text. Initial discussion views the punched card and paper tape IBM 1130 Computing Systems. Later discussion is directed to the disk-oriented 1130. Programming CONTENTS Punched Card and Paper Tape Systems 1 Object Time Core Analysis 4 Code Generated by Source Text 4 Data Storage Requirements 5 Subroutine Requirements 5 Overhead 6 Example 7 1130 Disk Systems 8 Program Size Implications 8 Program Speed Implications 12 This publication is a minor revision of the earlier edition, C20-1641-0, which is obsolete. Revisions to the text are indicated with a vertical line to the left of the change. Copies of this and other IBM publications can be obtained through IBM branch offices. Address comments concerning the contents of this publication to IBM, Technical Publications Department, 112 East Post Road, White Plains, N. Y. 10601 PUNCHED CARD AND PAPER TAPE SYSTEMS The accompanying chart contains information about each subroutine that can be used in running 1130 FOR TRAN object programs. An 1130 FOR TRAN obj ect program subroutine is utilized if the nature of the source text requires it. Thus, for example, a program with the multiply symbol (*) surrounded by two floating-point operands will have the floating-point multiply subroutine in object core. In addition, this subroutine may require others for proper operation. A full discu~sion of these requirements is given here. On the other hand, once the compiler determines that a requirement for an object time subroutine exists, the subroutine is loaded only once and may be used repeatedly from any point in the code generated from the source text. Note that in the discussion that follows, certain separate subroutines use other subroutines in common.