Intel® C++ Compiler 19.0 Developer Guide and Reference
Reads the content of an extended control register.
extern unsigned __int64 _xgetbv(unsigned int xcr); |
An extended control register to be read. Currently, only the value '0' is allowed.
This intrinsic reads from extended control registers. Currently, the only control register allowed/defined is (XCR0) XFEATURE_ENABLED_MASK register. The corresponding constant is defined in the immintrin.h file to refer to this register:
#define _XCR_XFEATURE_ENABLED_MASK 0This intrinsic maps to XGETBV instruction.
Returns the content of a specified extended control register.