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PMAXSD

Compares the signed 32-bit integers in two XMM register elements and stores the maximum value for each corresponding element in the destination.

The following table covers what the source and destinations can be:

DO NOT support LOCK

This instruction is available in 64-bit mode and compatibility mode. It requires SSE4.1 support.

To avoid incorrect results, ensure that the operands are treated as signed i32 integers. If unsigned comparison is required, the PMAXUD instruction SHALL be used instead. This instruction does not modify the EFLAGS register.