Handle "inplace" ops and unary ops w/ assembler

Handle "inplace" ops and unary ops w/ assembler

Extend the bswap test to have a case which will exhibit a bit of register
pressure to test register encoding more (at first wasn't sure if it was
0xC8 + reg or 0xC8 | reg... but it should be the same since there's only
0-7 for regs).

BUG=none
R=stichnot@chromium.org

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=3b43b8968fff7ec287967a2f549c404bfb89d898

[jvoung (off chromium), 2014-09-24 04:29:47]

jvoung@chromium.org changed reviewers:
+ stichnot@chromium.org

[Jim Stichnoth, 2014-09-24 15:40:28]

LGTM.

When the dust settles, we should try to do something about all the static_casts.

[jvoung (off chromium), 2014-09-24 18:15:58]

On 2014/09/24 15:40:28, stichnot wrote:
> LGTM.
> 
> When the dust settles, we should try to do something about all the
static_casts.

I ended up just factoring out the bytereg -> reg casting, while it's still easy
to clean up. Is that a bit better?

[Jim Stichnoth, 2014-09-24 20:22:01]

On 2014/09/24 18:15:58, jvoung wrote:
> On 2014/09/24 15:40:28, stichnot wrote:
> > LGTM.
> > 
> > When the dust settles, we should try to do something about all the
> static_casts.
> 
> I ended up just factoring out the bytereg -> reg casting, while it's still
easy
> to clean up. Is that a bit better?

Still lgtm, thanks!

[jvoung (off chromium), 2014-09-24 20:32:45]

Committed patchset #6 (id:100001) manually as 3b43b89 (presubmit successful).