Editing Bit manipulation instructions (section)

==== IBM S/370, S/370-XA, ESA/370, and ESA/390 vector operations ====
The [[IBM 3090]] introduced an optional [[vector processor|vector facility]]{{sfn|ibm370|loc=IBM System/370 Vector Operations|}} to the [[IBM System/370-XA|System/370-XA]] and [[Enterprise Systems Architecture/370]] instruction sets. In addition to integer and floating-point vector arithmetic and logical operations on multiple integer and floating-point values, it introduced vector bit manipulation operations [[count leading zeros]] {{code|vczvm}} and [[Hamming weight|population count]] {{code|vcovm}}.{{sfn|ibm370|pages=3{{hyp}}7-3{{hyp}}8|}}