Target options

Device

The device your are using. The choice of device will automatically determine the default linker configuration file and C-SPY® device description file. For information about how to override the default files, see the C-SPY Debugging documentation.

Floating-point

The compiler represents floating-point values by 32- and 64-bit numbers in standard IEEE 754 format. Size of type 'double' selects the size of the type double. Choose between:

32 bits: The data type double is represented by the 32-bit floating-point format.

64 bits: The data type double is represented by the 64-bit floating-point format.

For more information about the floating-point format, see Basic data types—floating-point types.

Subnormal numbers

Controls how the compiler shall treat 32-bit floating-point subnormal numbers. (By default, subnormal numbers are only supported for 64-bit floating-point numbers.) Choose between:

Handle with exceptions: The RX600 family libraries use the unimplemented processing exception of the CPU to support 32-bit floating-point subnormal numbers.

Treat as zero: 32-bit floating-point subnormal numbers are not supported and are treated as zero.

For more information about how the compiler handles subnormal numbers, see Representation of special floating-point numbers.

Position-independence

Makes the compiler generate code that uses position-independent references to address code and data. Choose between:

Code and read-only data: Generates position-independent code and read-only data.

Read-write data: Generates position-independent read-write data.

Note

Pointer constants cannot be initialized with the address of a movable object. However, writable variables can be initialized to constant addresses at runtime.

Byte order

Use the options in the Byte order area to choose the byte order for data (code is always little-endian). Choose between:

Little endian: Specifies little-endian as the default byte order for data.

Big endian: Specifies big-endian as the default byte order for data.

Int

The compiler uses 16 or 32 bits to represent the int data type. Size of type 'int' selects the size of the type int. Choose between:

16 bits: The size of the data type int is 16 bits.

32 bits: The size of the data type int is 32 bits.

For more details about the integer types, see Basic data types—integer types.

Data model

Selects the data model for your project:

Data model	Default memory attribute	Placement of data
Near	`__data16`	Low 32 Kbytes or high 32 Kbytes
Far	`__data24`	Low 8 Mbytes or high 8 Mbytes
Huge	`__data32`	The entire 4 Gbytes of memory

Table 13. Data model options

For more information about the data models, see Data models.

IAR Embedded Workbench for RX 5.20