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PMAXUD

Compares two unsigned 32-bit integers and stores the maximum value in the destination operand.

The following table covers the supported source and destination operands:

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 to be supported by the hardware.

To avoid undefined behavior or #I exceptions, ensure that the operands are correctly aligned to 4-byte boundaries when using memory operands (m4), as unaligned access may incur performance penalties or trigger alignment checks depending on the architectural state.