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Appearance-Based Equivalence Checking

Appearance-Based Equivalence Checking. Speaker: Daw -Ming Lee Advisor: Chun- Yao Wang 2009.06.12. Introduction. Given two circuits, golden circuit and revised circuit A ccording to their appearance , transform revised circuit to make it similar to golden circuit. Step I.

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Appearance-Based Equivalence Checking

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  1. Appearance-Based Equivalence Checking Speaker: Daw-Ming Lee Advisor: Chun-Yao Wang 2009.06.12

  2. Introduction • Given two circuits, golden circuit and revised circuit • According to their appearance , transform revised circuit to make it similar to golden circuit

  3. Step I • Convert multiple outputs circuit to many single output circuits, and examine each pair of single output circuits are equivalent or not • Transform each single output circuit to AIG form

  4. Transformation flow chart Compare the golden and revised circuits Structurally identical? T End F Choose one target wire to remove/add Redundant? F Add rectified circuit T Remove/add the target wire

  5. RAR a a b b c a c a a b b c a c

  6. RAR a a b b c a c 1 a 0 b c 1/0 1 a c 1 0 violate MA Redundant addition, no need to add rectified circuit

  7. RAR a b a c b c a c 1 a 0 b 1 c 1 a 1 c 1 1/0

  8. IRRA a a b b a b a a b b a a b b

  9. IRRA a a b b a a b b a b 0 0/1 a b 1/0 1/0 a 0 b

  10. IRRA a a b b a a b b a b 1 a a 0/1 b 1 Redundant remove, no need to add rectified circuit

  11. IRRA a a b b a a b b a b a b

  12. Future work • Find the rectified circuit of the missing/extra NOT fault • IRAA a a b b a a b b

  13. Thank you

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