Microsoft Specific

Reads the program status and control (EFLAGS) register.


unsigned     int __readeflags(void); /* x86 */
unsigned __int64 __readeflags(void); /* x64 */

Return value

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.


Intrinsic Architecture
__readeflags x86, x64

Header file <intrin.h>

END Microsoft Specific

See also

Compiler intrinsics