This content has not been validated; it was AI-generated following the x86-64 ISA Documentation generation process to maintain high quality. However, as no human has verified this data, errors may exist. If the accuracy of this data is critical, please consult the Intel SDM. The model used to generate this is gemma4:31b

VPERMILPS

Permutes single-precision floating-point values from a source to a destination based on an immediate byte. For each of the four destination slots, the instruction selects a 32-bit floating-point value from the source based on the index specified by the corresponding 2-bit field in the immediate.

The table after the description covers what the source and destinations can be.

DO NOT support LOCK

This instruction SHALL be executed in 64-bit mode or 32-bit mode. It is NOT available in 16-bit mode. It REQUIRES the AVX instruction set extension.

Ensure that the destination register is not the same as the source register if using a memory operand to avoid potential dependency stalls, although the architecture handles this. The immediate value MUST be provided as a byte; invalid indices beyond the range of the source XMM register are NOT applicable as the immediate is masked to 2 bits per slot.