tcg/TODO

   1 - test macro system
   2
   3 - test conditional jumps
   4
   5 - test mul, div, ext8s, ext16s, bswap
   6
   7 - generate a global TB prologue and epilogue to save/restore registers
   8   to/from the CPU state and to reserve a stack frame to optimize
   9   helper calls. Modify cpu-exec.c so that it does not use global
  10   register variables (except maybe for 'env').
  11
  12 - fully convert the x86 target. The minimal amount of work includes:
  13   - add cc_src, cc_dst and cc_op as globals
  14   - disable its eflags optimization (the liveness analysis should
  15     suffice)
  16   - move complicated operations to helpers (in particular FPU, SSE, MMX).
  17
  18 - optimize the x86 target:
  19   - move some or all the registers as globals
  20   - use the TB prologue and epilogue to have QEMU target registers in
  21     pre assigned host registers.
  22
  23 Ideas:
  24
  25 - Move the slow part of the qemu_ld/st ops after the end of the TB.
  26
  27 - Experiment: change instruction storage to simplify macro handling
  28   and to handle dynamic allocation and see if the translation speed is
  29   OK.
  30
  31 - change exception syntax to get closer to QOP system (exception
  32   parameters given with a specific instruction).