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VPDPWSSDS

Multiplies signed word-sized integers from a source operand with signed word-sized integers from a second source operand, sums the resulting products into signed doubleword-sized integers in the destination operand.

The following table specifies the supported source and destination operands.

DO NOT support LOCK

This instruction SHALL only be executed in 64-bit mode. It is NOT supported in compatibility mode.

The destination register is updated in-place; the original values in the destination register are used as the initial accumulators for the dot product. Failure to zero the destination register before use WILL result in an incorrect summation.