64-bit
In this section:
The 64-bit options specify target-specific features for the IAR C/C++ Compiler and Assembler in 64-bit mode.

Data model
Selects the data model for your project:
- ILP32
This data model has 32-bit
longand pointer types, and 32-bitwchar_ttype. It uses 32-bit ELF as object and image format.
- LP64
This data model has 64-bit
longand pointer types, and 32-bitwchar_ttype. It uses 64-bit ELF as object and image format.
Note
Code generated using the ILP32 data model cannot be linked with code generated using the LP64 data model.
- FPU
Select this option to use a floating-point unit with the data model, if it is available for your device.