This intrinsic inserts a
WFE instruction into the instruction stream generated by the compiler.
In some architectures, for example the v6T2 architecture, the
instruction executes as a
The compiler does not recognize the
__wfe intrinsic when compiling for a
target that does not support the
WFE instruction. The compiler generates
either a warning or an error in this case, depending on the source language:
- In C code:
Warning: #223-D: function "__wfe" declared implicitly.
- In C++ code:
Error: #20: identifier "__wfe" is undefined.