[Bug java/71917] [7 regression] libjava.jar/ReturnProxyTest.jar etc. FAIL

[matthew.fortune at imgtec dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71917

--- Comment #12 from Matthew Fortune <matthew.fortune at imgtec dot com> ---
Created attachment 39593
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39593&action=edit
Proposed fix

Attached fix should resolve the issue on sparc64 BE.

The original attempt at the fix for mips64el is reverted and instead the rvalue
conversion for the native FFI interface now copes with 64-bit little endian
targets ensuring sign/zero extension is performed appropriately. The fix is for
all architectures but presumably others do not suffer if the sign/zero
extension is missing (or have not noticed).