Reads the program status and control (EFLAGS) register.
unsigned int __readeflags(void);
unsigned __int64 __readeflags(void);
The value of the EFLAGS register. The return value is 32 bits long on a 32-bit platform and 64 bits long on a 64-bit platform.
These routines are available only as intrinsics.
Header file <intrin.h>
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