To see detailed information about an intrinsic, click on that intrinsic name in the following table.
The prototypes for Streaming SIMD Extensions (SSE) intrinsics are in the xmmintrin.h header file.
| Intrinsic Name |
Operation | Corresponding SSE Instruction |
|---|---|---|
| _mm_prefetch | Load | PREFETCH |
| _mm_stream_pi | Store | MOVNTQ |
| _mm_stream_ps | Store | MOVNTPS |
| _mm_sfence | Store fence | SFENCE |
void _mm_prefetch(char const*a, int sel)
Loads one cache line of data from address a to a location "closer" to the processor. The value sel specifies the type of prefetch operation: the constants _MM_HINT_T0, _MM_HINT_T1, _MM_HINT_T2, and _MM_HINT_NTA should be used for IA-32, corresponding to the type of prefetch instruction. The constants _MM_HINT_T1, _MM_HINT_NT1, _MM_HINT_NT2, and _MM_HINT_NTA should be used for Itanium®-based systems.
void _mm_stream_pi(__m64 *p, __m64 a)
Stores the data in a to the address p without polluting the caches. This intrinsic requires you to empty the multimedia state for the mmx register. See The EMMS Instruction: Why You Need It.
void _mm_stream_ps(float *p, __m128 a)
Stores the data in a to the address p without polluting the caches. The address must be 16-byte-aligned.
void _mm_sfence(void)
Guarantees that every preceding store is globally visible before any subsequent store.