Martin Storsjö authored Apr 23, 2013 and Niels Möller committed Apr 23, 2013

This fixes the umac test on win64.

Martin Storsjö authored Apr 23, 2013 and Niels Möller committed Apr 23, 2013

The Lpartial subfunction is entered with plain call instructions,
and the win64 epilogue should only run when actually exiting the
whole salsa20_crypt function.

Martin Storsjö authored Apr 23, 2013 and Niels Möller committed Apr 23, 2013

The stack is not guaranteed to be 16-byte aligned on win64.

Martin Storsjö authored Apr 23, 2013 and Niels Möller committed Apr 23, 2013

This fixes cross building for cases where EXEEXT differs from
EXEEXT_FOR_BUILD, such as when building for windows from unix.