[__arm_]vmaxvq[_s8]

Find the maximum value of the elements in a vector register. Store the maximum value in the general-purpose destination register only if it is larger than the starting value of the general-purpose destination register. The general-purpose register is read as the same width as the vector elements. The result of the operation is sign-extended to 32 bits before being stored back. The absolute variant of the instruction compares the absolute value of signed vector elements and treats the value in the general-purpose register as unsigned.