Virtualization Macros for the MasPar

Description

The virtual array software allows you to program with virtual arrays, that is arrays with dimensions that exceed the physical dimensions of the MasPar. For example, the machine may be configured with an array of 128 by 128 processing elements, while the virtual array is defined to be 512 by 512 elements.

The virtualization is accomplished by means of a preprocessor. After preprocessing a source file containing directives for virtualization, an mpl source file is produced. Thus the preprocessor simply relieves the programmer of the tedious task of coding the loop structures needed to process plural arrays whose sizes are multiples of the physical array size.

Associated with the virtualization are routines for the display of images which are stored as virtual arrays. These routines are defined in the file image.txt.

Contents

This package contains the following source modules:

• USAGE.TXT

  Introduction to coding using cut-and-stack virtualization

• v.c

  The preprocessor for MPL programs containing virtual constructs (".v" modules)

• virtual.h

  Header file to be included in .v programs includes definition of size of virtual array

• v_route_m.m

  Routines to perform virtual array shifting

• v_io_c.c

  Host side for i-o of arrays between disk and PEs

• v_io_m.m

  MasPar side for i-o of arrays between disk and PEs

• v_permute_m.m

  Permutation routines for image reformatting

• v_ipl.m

  Routine for reformatting images between MasPar (hierarchical) and cut-and-stack virtualization

• winprt.m

  Routine for typing out contents of virtual arrays

• winprt.txt

  How to use winprt

Availability