12th Generation Intel® Core™ Processors Datasheet, Volume 1 of 2


ID 655258
Date 28/10/2021 00:00:00
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Perform Carry-Less Multiplication Quad Word Instruction

The processor supports the carry-less multiplication instruction, ie, Perform Carry-Less Multiplication Quad Word Instruction (PCLMULQDQ). PCLMULQDQ is a Single Instruction Multiple Data (SIMD) instruction that computes the 128-bit carry-less multiplication of two 64-bit operands without generating and propagating carries. Carry-less multiplication is an essential processing component of several cryptographic systems and standards. Hence, accelerating carry-less multiplication can significantly contribute to achieving high-speed secure computing and communication.

PCLMULQDQ specifications and functional descriptions are included in the Intel® 64 Architectures Software Developer’s Manual, Volume 2. Available at: