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General Support Intrinsics
| Intrinsic name | Operation | Signed | Saturation | Assembly instruction |
|---|---|---|---|---|
| _mm_empty | Empties MM state | Not applicable | Not applicable | EMMS |
| _mm_cvtsi32_si64 | Converts from int | Not applicable | Not applicable | MOVD |
| _mm_cvtsi64_si32 | Converts from int | Not applicable | Not applicable | MOVD |
| _mm_packs_pi16 | Packs | Yes | Yes | PACKSSWB |
| _mm_packs_pi32 | Packs | Yes | Yes | PACKSSDW |
| _mm_packs_pu16 | Packs | No | Yes | PACKUSWB |
| _mm_unpackhi_pi8 | Interleaves | Not applicable | Not applicable | PUNPCKHBW |
| _mm_unpackhi_pi16 | Interleaves | Not applicable | Not applicable | PUNPCKHWD |
| _mm_unpackhi_pi32 | Interleaves | Not applicable | Not applicable | PUNPCKHDQ |
| _mm_unpacklo_pi8 | Interleaves | Not applicable | Not applicable | PUNPCKLBW |
| _mm_unpacklo_pi16 | Interleaves | Not applicable | Not applicable | PUNPCKLWD |
| _mm_unpacklo_pi32 | Interleaves | Not applicable | Not applicable | PUNPCKLDQ |
Packed Arithmetic Intrinsics
| Intrinsic name | Operation | Signed | Argument and result values/bits | Corresponding instruction |
|---|---|---|---|---|
| _mm_add_pi8 | Adds | Not applicable | 8/8, 8/8 | PADDB |
| _mm_add_pi16 | Adds | Not applicable | 4/16, 4/16 | PADDW |
| _mm_add_pi32 | Adds | Not applicable | 2/32, 2/32 | PADDD |
| _mm_adds_pi8 | Adds | Yes | 8/8, 8/8 | PADDSB |
| _mm_adds_pi16 | Adds | Yes | 4/16, 4/16 | PADDSW |
| _mm_adds_pu8 | Adds | No | 8/8, 8/8 | PADDUSB |
| _mm_adds_pu16 | Adds | No | 4/16, 4/16 | PADDUSW |
| _mm_sub_pi8 | Subtracts | Not applicable | 8/8, 8/8 | PSUBB |
| _mm_sub_pi16 | Subtracts | Not applicable | 4/16, 4/16 | PSUBW |
| _mm_sub_pi32 | Subtracts | Not applicable | 2/32, 2/32 | PSUBD |
| _mm_subs_pi8 | Subtracts | Yes | 8/8, 8/8 | PSUBSB |
| _mm_subs_pi16 | Subtracts | Yes | 4/16, 4/16 | PSUBSW |
| _mm_subs_pu8 | Subtracts | No | 8/8, 8/8 | PSUBUSB |
| _mm_subs_pu16 | Subtracts | No | 4/16, 4/16 | PSUBUSW |
| _mm_madd_pi16 | Multiplies | Not applicable | 4/16, 2/32 | PMADDWD |
| _mm_mulhi_pi16 | Multiplies | Yes | 4/16, 4/16 (high) | PMULHW |
| _mm_mullo_pi16 | Multiplies | Not applicable | 4/16, 4/16 (low) | PMULLW |
Logical Intrinsics
| Intrinsic name | Operation | Corresponding instruction |
|---|---|---|
| _mm_and_si64 | Bitwise AND | PAND |
| _mm_andnot_si64 | Logical NOT | PANDN |
| _mm_or_si64 | Bitwise OR | POR |
| _mm_xor_si64 | Bitwise exclusive OR | PXOR |
Compare Intrinsics
| Intrinsic name | Comparison | Number of elements | Element bit size | Corresponding instruction |
|---|---|---|---|---|
| _mm_cmpeq_pi8 | Equals | 8 | 8 | PCMPEQB |
| _mm_cmpeq_pi16 | Equals | 4 | 16 | PCMPEQW |
| _mm_cmpeq_pi32 | Equals | 2 | 32 | PCMPEQD |
| _mm_cmpgt_pi8 | Greater than | 8 | 8 | PCMPGTB |
| _mm_cmpgt_pi16 | Greater than | 4 | 16 | PCMPGTW |
| _mm_cmpgt_pi32 | Greater than | 2 | 32 | PCMPGTD |
Set Intrinsics
| Intrinsic name | Operation | Number of elements | Element bit size | Signed | Reverse order |
|---|---|---|---|---|---|
| _mm_setzero_si64 | Sets to zero | 1 | 64 | No | No |
| _mm_set_pi32 | Sets integer values | 2 | 32 | No | No |
| _mm_set_pi16 | Sets integer values | 4 | 16 | No | No |
| _mm_set_pi8 | Sets integer values | 8 | 8 | No | No |
| _mm_set1_pi32 | Sets integer values | 2 | 32 | Yes | No |
| _mm_set1_pi16 | Sets integer values | 4 | 16 | Yes | No |
| _mm_set1_pi8 | Sets integer values | 8 | 8 | Yes | No |
| _mm_setr_pi32 | Sets integer values | 2 | 32 | No | Yes |
| _mm_setr_pi16 | Sets integer values | 4 | 16 | No | Yes |
| _mm_setr_pi8 | Sets integer values | 8 | 8 | No | Yes |
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