Intrinsics to Read and Write Registers for Streaming SIMD Extensions

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

Intrinsic Name

Operation

Corresponding
SSE Instruction

_mm_getcsr

Return control register

STMXCSR

_mm_setcsr

Set control register

LDMXCSR

 

unsigned int _mm_getcsr(void)

Returns the contents of the control register.

 

void _mm_setcsr(unsigned int i)

Sets the control register to the value specified.