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IAR Embedded Workbench for RL78 5.20

Target options

In this section:

The Target options specify target-specific features for the IAR C/C++ Compiler and Assembler.

p_target_RL78_I_03.png
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.

Code model

Selects the code model for your project. Choose between:

Near

Function calls reach the first 64 Kbytes of memory.

Far

Function calls reach the entire 1 Mbytes of memory.

For more information about the code models, see Code models and memory attributes for function storage.

Use far runtime library calls

Places the runtime library support routines in __far_func memory. This option can be used for moving the support routines from near to far memory when building a customized library. Note that the startup code will still be located in near memory.

Data model

Selects the data model for your project. Choose between:

Near

Data is placed in the highest 64 Kbytes of memory.

Far

Data is placed in the entire 1 Mbytes of memory.

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

Near constant location

Specify the location for __near-declared constants and strings:

Override default addresses

Makes it possible to override the default start and end addresses for where in the RAM the constants shall be placed.

Copy to RAM

Constants are located in RAM, in the range 0xF0000–0xFFFFF

Mirror ROM0

Constants are located in ROM, in the range 0x00000–0x0FFFF, and are mirrored by hardware to RAM, in the range 0xF0000–0xFFFFF

Mirror ROM1

Constants are located in ROM, in the range 0x10000–0x1FFFF, and are mirrored by hardware to RAM, in the range 0xF0000–0xFFFFF

Start address

Type an address to override the default start address for where in the RAM the constants shall be placed.

End address

Type an address to override the default end address for where in the RAM the constants shall be placed.

For information about how this works and the available memory ranges, see the chip manufacturer’s 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.

Calling convention

Selects the calling convention for your project. Choose from:

Default

The default (V2) calling convention complies with the RL78 ABI and is recommended when you link with code produced by a tool from another vendor.

Legacy (V1.xx)

The legacy (V1) calling convention should only be used when you need compatibility with the IAR C/C++ Compiler for RL78 version 1.40.x.

For more information about the calling conventions, see Choosing a calling convention.