The miscellaneous intrinsics listed below are designed for the Intel processors code-named "Prescott".
extern void _mm_monitor(void const *p, unsigned extensions, unsigned hints);
Generates the MONITOR instruction. This sets up an address range for the monitor hardware using p to provide the logical address, and will be passed to the monitor instruction in register eax. The extensions parameter contains optional extensions to the monitor hardware which will be passed in ecx. The hints parameter will contain hints to the monitor hardware, which will be passed in edx. A non-zero value for extensions will cause a general protection fault.
extern void _mm_mwait(unsigned extensions, unsigned hints);
Generates the MWAIT instruction. This instruction is a hint that allows the processor to stop execution and enter an implementation-dependent optimized state until occurrence of a class of events. In future processor designs extensions and hints parameters may be used to convey additional information to the processor. All non-zero values of extensions and hints are reserved. A non-zero value for extensions will cause a general protection fault.