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Arithmetic Pipeline Stages

3 stages for addition

1. Exponent comparison and mantissa adjustment (shift)

   [m_x*2^e_x-e_y]

2. Mantissa addition (add)

   [[ ]+m_y]

3. Mantissa normalization and exponent readjustment

   [[ ]*2^e_y]

Problem: How to continuously feed floating point unit (FPU) with stream of operations?