NOT: bitwise logical compliment (F)

• used to

  toggle bits

  of argument:
  • result = NOT( argument )
• argument is converted to the nearest integer NINT(argument)
• precision is a normalized 53-bit fraction of the 8-byte IEEE T_floating format
• result = NOT( 4 ) ! result is -6:

    5 == 0000000000000000000000000000000000000000000000000000000000000101
   -6 == 1111111111111111111111111111111111111111111111111111111111111010

• to

  set bit n

  :
  • result = IOR(argument, 2^n) ! with n = 0 ... 53
  • bits0and2 = IOR(2^0, 2^2) ! is set to 1 + 4 = 5
• to

  test bit n

  :
  • result = IAND(argument, 2^n) /= 0 ! with n = 0 ... 53
  • bit3set = IAND( bits0and2, 2^3) ! evaluates to 0
• to

  clear bit n

  :
  • result = IAND(argument, NOT(2^n)) ! with n = 0 ... 53
  • clearbit0 = IAND( bits0and2, NOT(2^0) ) ! evaluates to 4
• to

  bitwise either-or

  x and y:
  • result = IEOR( x, y )
  the bit-by-bit result-bit is 1 if x-bit and y-bit differ, and is 0 if x-bit and y-bit are equal:

   result = IEOR( 3, 10 ) ! result is 9

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