[Qemu-devel] [PATCH 0/5] tcg/i386: use movbe instruction in qemu_ldst routines

[Aurelien Jarno]

This patchset enable the usage of the movbe instruction, available on
Intel Atom and Intel Haswell CPU, in qemu_ldst routines, avoiding bswap
instructions before or after the store or loads. The availability of
this instruction is done at runtime using the cpuid instruction.

The last patch of the series is not fully related, but I spotted the
issue when working on this patchset, so I thought it's a good idea to
fix it.

Aurelien Jarno (5):
  disas/i386.c: disassemble movbe instruction
  tcg/i386: remove hardcoded P_REXW value
  tcg/i386: add support for three-byte opcodes
  tcg/i386: use movbe instruction in qemu_ldst routines
  tcg/i386: cleanup useless #ifdef

 disas/i386.c          |    8 +--
 tcg/i386/tcg-target.c |  178 ++++++++++++++++++++++++++++++++++---------------
 2 files changed, 128 insertions(+), 58 deletions(-)

-- 
1.7.10.4