Because the denominator is a power of two the multiplication can be implemented as an arithmetic shift to the left and the division as an arithmetic shift to the right; on many processors shifts are faster than multiplication and division.
12.
Because the denominator is a power of two the multiplication can be implemented as an arithmetic shift to the left and the division as an arithmetic shift to the right; on many processors shifts are faster than multiplication and division.
13.
Most C and C + + implementations, and Go, choose which right shift to perform depending on the type of integer being shifted : signed integers are shifted using the arithmetic shift, and unsigned integers are shifted using the logical shift.
14.
An arithmetic shift left of a balanced ternary number is the equivalent of multiplication by a ( positive, integral ) power of 3; and an arithmetic shift right of a balanced ternary number is the equivalent of division by a ( positive, integral ) power of 3.
15.
An arithmetic shift left of a balanced ternary number is the equivalent of multiplication by a ( positive, integral ) power of 3; and an arithmetic shift right of a balanced ternary number is the equivalent of division by a ( positive, integral ) power of 3.
16.
The instructions available were : Add, Subtract, multiply-and-add, AND-and-add ( called " Collate " ), shift Left, arithmetic shift Right, load multiplier register, store ( and optionally clear ) accumulator, conditional Goto, read Input tape, print character, round accumulator, no-op, and stop.
17.
Unlike an arithmetic shift, a logical shift does not preserve a number's sign bit or distinguish a number's exponent from its significand ( mantissa ); every bit in the operand is simply moved a given number of bit positions, and the vacant bit-positions are filled, usually with zeros ( contrast with a circular shift ).
18.
For instance, to compute 1.44 / 1, 200, 000, 000, divide the denominator by a billion, compute 1.44 / 1.2 = 1.2, then divide the result by a billion = 1.2e-9 . To simplify the math, better to divide by a power of 2, here 2 ^ 30 would be good, which would just be an arithmetic shift for fixed point numbers .-- talk ) 03 : 17, 31 August 2013 ( UTC)
