The 24-year-old, who is currently representing Spain at the Olympics, netted 13 goals in La Liga during a loan spell at Huesca last season.
With Mir having no intention of reviving his career at Molineux and with just a year left on on his contract, Wolves are looking to cash in on the player.
While Wolves are likely to prefer a straight fee, the report suggests that they would be open to discussing a swap deal in a bid to help Barcelona's financial situation.
Mir's stock rose over the weekend as he netted a hat-trick for Spain in the Olympic quarter-finals against Ivory Coast. body check tags ::