bas7qck.hlp (Table of Contents; Topic list)
IMP Operator
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result = numeric-expression1 IMP numeric-expression2
 
    ■ The logical-implication operator, IMP, compares corresponding bits in
      numeric-expression1 and numeric-expression2, and then sets the
      corresponding bit in the result according to the following table:
 
      ═══════════════════════   ════════════════════════   ═════════════
      Bit in first expression   Bit in second expression   Bit in result
      ═══════════════════════   ════════════════════════   ═════════════
                1                          1                    1
                1                          0                    0
                0                          1                    1
                0                          0                    1
      ═══════════════════════   ════════════════════════   ═════════════