Intrinsics to Read and Write Registers

The prototypes for Intel® Streaming SIMD Extensions (Intel® SSE) intrinsics to read from and write to registers are in the xmmintrin.h header file.

To use these intrinsics, include the immintrin.h file as follows:

#include <immintrin.h>

Intrinsic Name

Operation

Corresponding
Intel® SSE Instruction

_mm_getcsr

Return control register

STMXCSR

_mm_setcsr

Set control register

LDMXCSR

_mm_getcsr

unsigned int _mm_getcsr(void);

Returns the contents of the control register.

_mm_setcsr

void _mm_setcsr(unsigned int i);

Sets the control register to the value specified by i.

Para obtener información más completa sobre las optimizaciones del compilador, consulte nuestro Aviso de optimización.