ARM Compiler armasm User Guide : 16.171 UMULL

16.171 UMULL

Unsigned Multiply Long.

This instruction is an alias of UMADDL.

The equivalent instruction is UMADDL Xd, Wn, Wm, XZR.

UMULL Xd, Wn, Wm

Where:

Xd: Is the 64-bit name of the general-purpose destination register.
Wn: Is the 32-bit name of the first general-purpose source register holding the multiplicand.
Wm: Is the 32-bit name of the second general-purpose source register holding the multiplier.

Unsigned Multiply Long multiplies two 32-bit register values, and writes the result to the 64-bit destination register.

Xd = Wn * Wm.

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