9.3.105 MULT_HIGH (I, J) (Alpha only)

Description:  Multiplies two 64-bit unsigned integers.  
Class:  Elemental function; Generic 
Arguments:  I Must be of type INTEGER(8).
  J Must be of type INTEGER(8).
Results:  The result type is INTEGER(8). The result value is the upper (leftmost) 64 bits of the 128-bit unsigned result.


Consider the following:

          INTEGER(8) I,J,K
          K = MULT_HIGH (I,J)
          PRINT *,I,J,K
          WRITE (6,1000)I,J,K
  1000    FORMAT (' ', 3(Z,1X))

This example prints the following:

       9007199254740992      2251799813685248         1099511627776
           20000000000000           8000000000000             10000000000

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