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VDBPSADBW

Computes the sum of absolute differences between the unsigned 8-bit integers in the source operand and the unsigned 8-bit integers in the destination operand. Specifically, it subtracts the source byte from the destination byte, takes the absolute value of the result, and accumulates the sums into 64-bit signed integers within the destination register.

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

DO NOT support LOCK

This instruction is only available when the processor is operating in 64-bit mode or compatibility mode. It requires the SSE4.1 instruction set extension.

The destination register is overwritten by the result of the operation; therefore, the original values in the destination xmm register are lost. To avoid data loss, the destination register MUST be backed up if its initial content is required for subsequent operations.