HP C A.06.05 Reference Manual

Expressions and Operators
Bit Operators (<<, >>, &, ^, |, ~)
Chapter 5 93
Bit Operators (<<, >>, &, ^, |, ~)
Syntax
exp1 << exp2 Left shifts (logical shift) the bits in exp1 by exp2 positions.
exp1 >> exp2 Right shifts (logical or arithmetic shift) the bits in exp1 by exp2 positions.
exp1 & exp2 Performs a bitwise AND operation.
exp1 ^ exp2 Performs a bitwise OR operation.
exp1 | exp2 Performs a bitwise inclusive OR operation.
~exp1 Performs a bitwise negation (one's complement) operation.
Arguments
exp1 and exp2 Any integer expression.
Description
The bit operators access specific bits in an object. HP C supports the usual six bit operators,
which can be grouped into shift operators and logical operators.
Bit-Shift Operators
The << and >> operators shift an integer left or right respectively. The operands must have
integer type, and all automatic promotions are performed for each operand. For example, the
program fragment
short int to_the_left = 53, to_the_right = 53;
short int left_shifted_result, right_shifted_result;
left_shifted_result = to_the_left << 2;
right_shifted_result = to_the_right >> 2;
sets left_shifted_result to 212 and right_shifted_result to 13. The results are clearer
in binary:
base 2 base 10
0000000000110101 53
0000000011010100 212 /* 53 shifted left 2 bits */
0000000000001101 13 /* 53 shifted right 2 bits */