Maybe look for Cross VIrtualization products.
Transitive (I thin was bought from IBM)
http://www.icesystems.com.au/files/pdf/transitive/Transitive_Virtualization_Whitepaper.pdf
http://download.intel.com/technology/virtualization/Transitive_Solution_Brief.pdf
http://en.wikipedia.org/wiki/QuickTransit
http://blog.boreas.ro/2008/03/runing-solaris-sparc-software-on-x86-64.html
Must IBM be asked.
Windrive
http://www.windriver.com/products/product-overviews/po_simics_0612.pdf
I think stromasys is a solution
SYBIL/SS20 allows organizations running business-critical applications to run a virtual SPARCstation 5,10, or 20 through a SPARCstation 20 hardware abstraction layer (HAL) on an industry x86 computer system, server or laptop. When installed, the HAL appears to any software running on it as SPARCstation20 hardware
For OpenVMS
http://www.stromasys.com/products/charon-vax/
Michael