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  1. ARCHITECTURE ARCH OF ENTITY IS
  2. BEGIN
  3. PROC_1 : PROCESS (a, b, c, d) IS
  4. BEGIN
  5. IF (a = 1) THEN
  6. CASE b
  7. WHEN 1 =>
  8. c <= d;
  9. CASE b
  10. WHEN 1 =>
  11. c <= d;
  12. WHEN 2 =>
  13. d <= f;
  14. END CASE;
  15. WHEN 2 =>
  16. d <= f;
  17. END CASE;
  18. ELSIF (b = 1) THEN
  19. CASE b
  20. WHEN 1 =>
  21. c <= d;
  22. WHEN 2 =>
  23. d <= f;
  24. END CASE;
  25. ELSE
  26. CASE b
  27. WHEN 1 =>
  28. c <= d;
  29. WHEN 2 =>
  30. d <= f;
  31. END CASE;
  32. END IF;
  33. END PROCESS PROC_1;
  34. END ARCHITECTURE ARCH;