Go backward to MPL Statements Go up to Top Go forward to X-Net Communication

Assignments

int i, j, k[nxproc][nyproc];
plural int a, b;

• i = i+j; singular
• a = a*i+b; plural
  • ACU broadcasts $i$ to all PEs.
  • Each active PE executes statement using its local variables $a$ and $b$.
• j = a*i+b; illegal!

  All PEs would store their results in singular $j$!

• k[ixproc][iyproc] = a*i+b; plural

  Each PE stores its result in a different location of the singular matrix on the ACU.