[Qemu-devel] [PATCH 0/2] tcg/i386 guest_base improvements

[Richard Henderson]

The first change does two things: (1) improve bsd-user so that it
doesn't continually reload guest_base into a temp register and
(2) extract the bulk of the guest_base logic to a routine that
is run once at startup.

The second change adds segmentation support to 32-bit linux.  There,
if we're using a guest base, we can save 3 bytes per memory op by
using a segment override.  In addition, if we're using a reserved_va,
we can set up the segment such that guest memory references are
constrained by the segment.

Comments?


r~


Richard Henderson (2):
  tcg/i386: Reserve register for guest_base if a segment isn't available
  tcg/i386: Use segment for 32-bit guest base on linux

 tcg/i386/tcg-target.inc.c | 181 +++++++++++++++++++++++++---------------------
 1 file changed, 100 insertions(+), 81 deletions(-)

-- 
2.5.5