Signed Multiply Long.
This instruction is an alias of
Is the 64-bit name of the general-purpose destination register.
Is the 32-bit name of the first general-purpose source register holding the multiplicand.
Is the 32-bit name of the second general-purpose source register holding the multiplier.
Signed Multiply Long multiplies two 32-bit register values, and writes the result to the 64-bit destination register.