New 256-bit Instructions
These AVX instructions are in addition to the ones that are 256-bit extensions of the legacy 128-bit SSE instructions:
| Instruction | Description |
|---|---|
| VBROADCASTSS, VBROADCASTSD, VBROADCASTF128 | Copy a 32-bit, 64-bit or 128-bit memory operand to all elements of a XMM or YMM vector register. |
| VINSERTF128 | Replaces either the lower half or the upper half of a 256-bit YMM register with the value of a 128-bit source operand. The other half of the destination is unchanged. |
| VEXTRACTF128 | Extracts either the lower half or the upper half of a 256-bit YMM register and copies the value to a 128-bit destination operand. |
| VMASKMOVPS, VMASKMOVPD | Conditionally reads any number of elements from a SIMD vector memory operand into a destination register, leaving the remaining vector elements unread and setting the corresponding elements in the destination register to zero. Alternatively, conditionally writes any number of elements from a SIMD vector register operand to a vector memory operand, leaving the remaining elements of the memory operand unchanged. |
| VPERMILPS, VPERMILPD | Shuffle 32-bit or 64-bit vector elements, with a register or memory operand as selector. |
| VPERM2F128 | Shuffle the four 128-bit vector elements of two 256-bit source operands into a 256-bit destination operand, with an immediate constant as selector. |
| VZEROALL | Set all YMM registers to zero and tag them as unused. Used when switching between 128-bit use and 256-bit use. |
| VZEROUPPER | Set the upper half of all YMM registers to zero. Used when switching between 128-bit use and 256-bit use. |
Read more about this topic: Advanced Vector Extensions
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