7.9 psb_bcast — Broadcast data

This subroutine implements a broadcast operation based on the underlying communication library.

Type:

Synchronous.

On Entry

icontxt

the communication context identifying the virtual parallel machine.
Scope: global.
Type: required.
Intent: in.
Specified as: an integer variable.

dat

On the root process, the data to be broadcast.
Scope: global.
Type: required.
Intent: inout.
Specified as: an integer, real or complex variable, which may be a scalar, or a rank 1 or 2 array, or a character or logical variable, which may be a scalar or rank 1 array.  Type, kind, rank and size must agree on all processes.

root

Root process holding data to be broadcast.
Scope: global.
Type: optional.
Intent: in.
Specified as: an integer value 0 <= root <= np - 1, default 0  

On Return

dat

On processes other than root, the data to be broadcast.
Scope: global.
Type: required.
Intent: inout.
Specified as: an integer, real or complex variable, which may be a scalar, or a rank 1 or 2 array, or a character or logical scalar.  Type, kind, rank and size must agree on all processes.