cmd/compile/internal/sparc64: fix uint32->float64 conversions
cmd/compile/internal/sparc64: fix uint32->float64 conversions

Change-Id: I05242c2ec6c6acf2b178039deb644197a969c25d

4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go