code: def _negf(ins):
      ''' Changes sign of top of the stack (48 bits)
      '''
      output = _float_oper(ins.quad[2])
      output.append('call __NEGF')
      output.extend(_fpush())
      REQUIRES.add('negf.asm')
      return outpuf _negf(ins):
      ''' Changes sign of top of the stack (48 bits)
      '''
      output = _float_oper(ins.quad[2])
      output.append('call __NEGF')
      output.extend(_fpush())
      REQUIRES.add('negf.asm')
      return output
docs: Changes sign of top of the stack (48 bits)