Go backward to Vector Loop Go up to Top Go forward to Vector Architectures

Chaining

• Overlapping of vector instructions

  (see Hwang, Figure 8.18)

• Hence: $c+n$ ticks (for small $c$)

  Speedup $approx.6$
  ($c=16,\; n=128,\; s=(6*128)/(16+128)=5.33$)

• The longer the vector chain, the better the speedup!

  $$A <-B*C+D
  chaining degree 5