Holtek HT-IDE, User Manual

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Bitwise operators
There are six operators for manipulating bit-by-bit operations. The shift
operators >> and << perform the right and left shifts of the left operand by
the number of bit positions given by the right operand, which must be
positive. The unary ~ yields the one’s complement of an integer, converts
every 1-bit to a 0-bit and vice versa.
& bitwise AND
| bitwise OR
^ bitwise XOR
~ one’s complement
>> right shift
<< left shift
Assignment operators
There are a total of 10 assignment operators for expression statements. For
simple assignment, the equal sign is used with the value of the expression
replacing the variable, in the left operand. This also provides a shortcut for
modifying a variable by performing an operation on itself.
<var> + = <expr> add the value of <expr> to <var>
<var> – = <expr> subtract the value of <expr> from <var>
<var> * = <expr> multiply <var> by the value of <expr>
<var> / = <expr> divide <var> by the value of <expr>
<var> % = <expr> modulus, remainder when <var> is divided by <expr>
<var> & = <expr> bitwise AND <var> with the value of <expr>
<var> | = <expr> bitwise OR <var> with the value of <expr>
<var>
∧
= <expr> bitwise XOR <var> with the value of <expr>
<var> >> = <expr> right shift <var> by <expr> positions
<var> << = <expr> left shift <var> by <expr> positions
Increment and decrement operators
The increment and decrement operators can be used in a statement by
themselves, or can be embedded within a statement with other operators.
The position of the operator indicates whether the increment or decrement
is to be performed before (prefix operators) or after (postfix operators) the
evaluation of the statement it is embedded within.
++ <var> pre-increment
<var> ++ post-increment
– – <var>
pre-decrement
<var>– – post-decrement
HT-IDE User’s Guide
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