IAND: bitwise logical AND (F)

• to

  logically and bits

  :
  • result = IAND( x, y )
  result is a logical AND on corresponding bits

   result = IAND( 2, 3 ) ! result is set to 2:
     2 == 0000000000000000000000000000000000000000000000000000000000000010
     3 == 0000000000000000000000000000000000000000000000000000000000000011

   result = IAND( 2, -1 ) ! result is set to 2:
     2 == 0000000000000000000000000000000000000000000000000000000000000010
    -1 == 1111111111111111111111111111111111111111111111111111111111111111

• IAND to

  clear bit n

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

  test bit n

  :
  • result = IAND(argument, 2^n) /= 0 ! with n = 0 ... 53
  • bit3set = IAND( bits0and2, 2^3) ! evaluates to 0
• precision is a normalized 53-bit fraction of the 8-byte IEEE T_floating format
• IOR 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
• NOT to

  toggle bits

  of argument:
  • result = NOT( argument )

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