Question: Computer, Machine Language

  • Suppose John tries to execute the loop below as efficiently as possible. He has 2 different machines, a MIMD machine and a SIMD machine. 

for (i=0; i<2048;i++)

for (j=0; j<2048;j++)

X_array [i][j] = Y_array [i][j] + 256;

1- For a 4-CPU MIMD machine, show the sequence of MIPS instructions that you would execute on each CPU. What is the speedup for this MIMD machine?

2- For an 8-wide SIMD machine (8 parallel SIMD functional units), compare the number of instructions executed on the SIMD machine to the MIMD machine.

Solution:

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