Macros for Common Intrinsics
9/7/2007
All microprocessor families that support common intrinsic functions have a machine-dependent description of support in the header file, cmnintr.h. The machine-dependent description does the following:
- Declares the functions with the correct prototype
- Enables the intrinsic version
- Defines macros that classify how the function is supported
You can use the intrinsic function unconditionally or you can use one of the macros to classify the intrinsic support in your CPU environment.
The following table shows descriptions of the macros for common intrinsic functions.
| Macro | Description |
|---|---|
This macro determines if an intrinsic function is instantiated through a call to the C Run-time Library (CRT). |
|
This macro tests to determine if the compiler can expand a specified intrinsic to one or more lines. |
|
This macro determines if a specified intrinsic function is instantiated independent of the OS. |
|
This macro determines if a specified intrinsic function is supported. |