The prototypes for MMX(TM) technology intrinsics are in the mmintrin.h header file.
| Intrinsic Name |
Alternate Name |
Comparison | Number of Elements |
Element Bit Size |
Corresponding Instruction |
|---|---|---|---|---|---|
| _m_pcmpeqb | _mm_cmpeq_pi8 | Equal | 8 | 8 | PCMPEQB |
| _m_pcmpeqw | _mm_cmpeq_pi16 | Equal | 4 | 16 | PCMPEQW |
| _m_pcmpeqd | _mm_cmpeq_pi32 | Equal | 2 | 32 | PCMPEQD |
| _m_pcmpgtb | _mm_cmpgt_pi8 | Greater Than | 8 | 8 | PCMPGTB |
| _m_pcmpgtw | _mm_cmpgt_pi16 | Greater Than | 4 | 16 | PCMPGTW |
| _m_pcmpgtd | _mm_cmpgt_pi32 | Greater Than | 2 | 32 | PCMPGTD |
__m64 _m_pcmpeqb(__m64 m1, __m64 m2)
If the respective 8-bit values in m1 are equal to the respective 8-bit values in m2 set the respective 8-bit resulting values to all ones, otherwise set them to all zeros.
__m64 _m_pcmpeqw(__m64 m1, __m64 m2)
If the respective 16-bit values in m1 are equal to the respective 16-bit values in m2 set the respective 16-bit resulting values to all ones, otherwise set them to all zeros.
__m64 _m_pcmpeqd(__m64 m1, __m64 m2)
If the respective 32-bit values in m1 are equal to the respective 32-bit values in m2 set the respective 32-bit resulting values to all ones, otherwise set them to all zeros.
__m64 _m_pcmpgtb(__m64 m1, __m64 m2)
If the respective 8-bit values in m1 are greater than the respective 8-bit values in m2 set the respective 8-bit resulting values to all ones, otherwise set them to all zeros.
__m64 _m_pcmpgtw(__m64 m1, __m64 m2)
If the respective 16-bit values in m1 are greater than the respective 16-bit values in m2 set the respective 16-bit resulting values to all ones, otherwise set them to all zeros.
__m64 _m_pcmpgtd(__m64 m1, __m64 m2)
If the respective 32-bit values in m1 are greater than the respective 32-bit values in m2 set the respective 32-bit resulting values to all ones, otherwise set them all to zeros.