tree 54fcfbdf8f15d62f5e2c8ac9d2f43f80222ee9b7
parent 1acd5a373905ddb28957842256a038956941f332
author Paolo Bonzini <pbonzini@redhat.com> 1371737972 +0200
committer Paolo Bonzini <pbonzini@redhat.com> 1372745821 +0200

int128: optimize and add test cases

For add, the carry only requires checking one of the arguments.
For sub and neg, we can similarly optimize computation of the
carry.

For ge, we can just do lexicographic order.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>