Supported Operations with Fixed-Point Operands :: Using Fixed-Point Data in Stateflow (Stateflow User's Guide)

Stateflow User's Guide

Supported Operations with Fixed-Point Operands

Stateflow supports the operations listed in the topics that follow.

Binary Operations

Stateflow supports the following binary operations with the listed precedence:

Example
Precedence
Description

a * b
10
Multiplication

a / b
10
Division

a + b
9
Addition

a - b
9
Subtraction

a > b
7
Comparison, greater than

a < b
7
Comparison, less than

a >= b
7
Comparison, greater than or equal to

a <= b
7
Comparison, less than or equal to

a == b
6
Comparison, equality

a ~= b
6
Comparison, inequality

a != b
6
Comparison, inequality

a <> b
6
Comparison, inequality

a & b
5
One of the following:
Bitwise AND

Enabled when Enable C-bit operations is selected in the chart properties dialog. See Specifying Chart Properties. Operands are cast to integers before the operation is performed.

Logical AND

Enabled when Enable C-bit operations is cleared in chart properties dialog.

a | b
3
One of the following:
Bitwise OR

Enabled when Enable C-bit operations is selected in chart properties dialog. See Specifying Chart Properties. Operands are cast to integers before the operation is performed.

Logical OR

Enabled when Enable C-bit operations is cleared in chart properties dialog.

a && b
2
Logical AND

a || b
1
Logical OR

Example	Precedence	Description
`a * b`	10	Multiplication
`a / b`	10	Division
`a + b`	9	Addition
`a - b`	9	Subtraction
`a > b`	7	Comparison, greater than
`a < b`	7	Comparison, less than
`a >= b`	7	Comparison, greater than or equal to
`a <= b`	7	Comparison, less than or equal to
`a == b`	6	Comparison, equality
`a ~= b`	6	Comparison, inequality
`a != b`	6	Comparison, inequality
`a <> b`	6	Comparison, inequality
`a & b`	5	One of the following: Bitwise AND Enabled when Enable C-bit operations is selected in the chart properties dialog. See Specifying Chart Properties. Operands are cast to integers before the operation is performed. Logical AND Enabled when Enable C-bit operations is cleared in chart properties dialog.
`a \| b`	3	One of the following: Bitwise OR Enabled when Enable C-bit operations is selected in chart properties dialog. See Specifying Chart Properties. Operands are cast to integers before the operation is performed. Logical OR Enabled when Enable C-bit operations is cleared in chart properties dialog.
`a && b`	2	Logical AND
`a \|\| b`	1	Logical OR

Unary Operations and Actions

Stateflow supports the following unary operations and actions:

Example
Description

~a
Unary minus

!a
Logical not

a++
Increment

a--
Decrement

Example	Description
`~a`	Unary minus
`!a`	Logical not
`a++`	Increment
`a--`	Decrement

Assignment Operations

Stateflow supports the following assignment operations:

Example
Description

a = expression
Simple assignment

a := expression
See Assignment Operator :=.

a += expression

Equivalent to a = a + expression

a -= expression

Equivalent to a = a - expression

a *= expression

Equivalent to a = a * expression

a /= expression

Equivalent to a = a / expression

a |= expression
Equivalent to a = a | expression (bit operation). See operation a | b in Binary Operations.

a &= expression
Equivalent to a = a & expression (bit operation). See operation a & b in Binary Operations.

Example	Description
`a = expression`	Simple assignment
`a := expression`	See Assignment Operator :=.
`a += expression`	Equivalent to `a = a + expression`
`a -= expression`	Equivalent to `a = a - expression`
`a *= expression`	Equivalent to `a = a * expression`
`a /= expression`	Equivalent to `a = a / expression`
`a \|= expression`	Equivalent to `a = a \| expression` (bit operation). See operation `a \| b` in Binary Operations.
`a &= expression`	Equivalent to `a = a & expression` (bit operation). See operation `a & b` in Binary Operations.

Operations with Fixed-Point Data Promotion Rules for Fixed-Point Operations