Mikroelektronika MIKROE-350 データシート

Arithmetic operators are used to perform mathematical computations. They have numer-
ical operands and return numerical results. Since the 

char

operators are technically

bytes

, they can be also used as unsigned operands in arithmetic operations.

All arithmetic operators associate from left to right.

If 0 (zero) is used explicitly as the second operand (i.e. x 

div 0

), the compiler will

report an error and will not generate code. 
But in case of implicit division by zero: 

x div y

, where y is 0 (zero), the result will

be the maximum integer (i.e 

255

, if the result is byte type; 

65536

, if the result is 

word

type, etc.).

Operator - can be used as a prefix unary operator to change sign of a signed value.
Unary prefix operator + can be used, but it doesn’t affect data.

For example:

b = -a

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5

+

addition

byte, short, word,

integer, longint,

longword, float

byte, short, word,

integer, longint,

longword, float

-

subtraction

byte, short, word,

integer, longint,

longword, float

byte, short, word,

integer, longint,

longword, float

*

multiplication

byte, short, word,

integer, longint,

longword, float

word, integer,

longint, longword,

float

/

division, floating-point

byte, short, word,
integer, longint,
longword, float

float

div

division, rounds down to near-
est integer

byte, short, word,
integer, longint,

longword

byte, short, word,
integer, longint,

longword

mod

modulus, returns the remainder
of integer division (cannot be
used with floating points)

byte, short, word,
integer, longint,

longword

byte, short, word,
integer, longint,

longword