[Qemu-devel] [PATCH for-1.8 00/61] target-i386 improvements

[Richard Henderson <rth@twiddle.net>]

This started out merely to update the i386 target to use the
new tcg_gen_qemu_{ld,st}_{i32,i64,tl} entry points.  This goal
is complete around patch 18.

But in the process of doing that, I noticed a lot of room for
cleanup wrt "helper" functions that only obfuscate the goal.
That's primarily what all of the "Remove" patches are about.

We also had "size-like" variables in two different domains:
(1) the operand-type ("ot") domain using OT_{BYTE,WORD,LONG,QUAD},
which was log2(byte_size); and (2) the dflag/aflag domain using
bare integer constants which was log2(byte_size)-1.  Moving to the
log2(byte_size) domain using MO_SIZE constants cleans up everything
nicely, reducing confusion.

Finally, there are a set of bugs fixed with regard to failing to
zero-extend 32-bit addresses in the x86-64 translator.  This is
easiest to see in patch 38 (Fix addr32 prefix in gen_lea_modrm)
which fixes an existing test case.  But I believe that introducing
gen_lea_v_seg and using it everywhere fixes quite a few similar
bugs that would be more difficult to notice.

This does wind up adding some zero-extensions that by inspection
can be seen to be redundant (each generated by different subroutines),
but I believe the tcg optimizer improvements that Aurelien has
posted (but not committed) would clean those up.


r~


Richard Henderson (61):
  exec: Delay CPU_LOG_TB_CPU until we actually execute a TB
  target-i386: Push DisasContext into load/store helpers
  target-i386: Stop encoding DisasContext.mem_index
  target-i386: Use new tcg_gen_qemu_ld_* helpers
  target-i386: Use new tcg_gen_qemu_st_* helpers
  target-i386: Replace OT_* constants with MO_* constants
  target-i386: Remove gen_op_ld_T0_A0
  target-i386: Remove gen_op_ldu_T0_A0
  target-i386: Remove gen_op_ld_T1_A0
  target-i386: Remove gen_op_lds_T0_A0
  target-i386: Introduce gen_op_st_rm_T0_A0
  target-i386: Remove gen_op_st_T0_A0
  target-i386: Remove gen_op_st_T1_A0
  target-i386: Fix typo in gen_push_T1
  target-i386: Tidy mov[sz][bw]
  target-i386: Tidy movsl
  target-i386: Remove unused arguments to gen_lea_modrm
  target-i386: Use MO_BE for movbe
  target-i386: Tidy gen_op_mov_TN_reg+tcg_gen_trunc_tl_i32
  target-i386: Tidy load + truncate
  target-i386: Tidy extend + store
  target-i386: Tidy extend + move
  target-i386: Remove gen_op_movl_T0_0
  target-i386: Remove gen_op_movl_T0_im*
  target-i386: Remove gen_op_movl_T0_im*
  target-i386: Remove gen_op_mov*_A0_im
  target-i386: Remove gen_movtl_T*_im
  target-i386: Remove gen_op_andl_T0_ffff
  target-i386: Remove gen_op_andl_T0_im
  target-i386: Remove gen_op_movl_T0_T1
  target-i386: Remove gen_op_andl_A0_ffff
  target-i386: Use TCGMemOp for 'ot' variables
  target-i386: Change gen_op_add_reg_* size parameter to TCGMemOp
  target-i386: Change gen_op_j*z_ecx size parameter to TCGMemOp
  target-i386: Change aflag to TCGMemOp
  target-i386: Change gen_op_mov_reg_A0 size parameter to TCGMemOp
  target-i386: Change dflag to TCGMemOp
  target-i386: Fix addr32 prefix in gen_lea_modrm
  target-i386: Tidy addr16 code in gen_lea_modrm
  target-i386: Combine gen_push_T* into gen_push_v
  target_i386: Clean up gen_pop_T0
  target-i386: Create gen_lea_v_seg
  target-i386: Use gen_lea_v_seg in gen_lea_modrm
  target-i386: Use gen_lea_v_seg in stack subroutines
  target-i386: Tidy cpu_regs initialization
  target-i386: Access segs via TCG registers
  target-i386: Use gen_lea_v_seg in pusha/popa
  target-i386: Rewrite gen_enter inline
  target-i386: Introduce mo_stacksize
  target-i386: Rewrite leave
  target-i386: Remove gen_op_mov_reg_T0
  target-i386: Remove gen_op_mov_reg_T1
  target-i386: Remove gen_op_addl_T0_T1
  target-i386: Remove gen_op_mov_TN_reg
  target-i386: Remove gen_op_mov_reg_A0
  target-i386: Remove gen_op_movl_A0_reg
  target-i386: Tidy gen_add_A0_im
  target-i386: Tidy some size computation
  target-i386: Rename gen_op_jmp_T0 to gen_op_jmp_v
  target-i386: Tidy ljmp
  target-i386: Deconstruct the cpu_T array

 cpu-exec.c               |   36 +-
 target-i386/helper.h     |    4 -
 target-i386/seg_helper.c |   68 -
 target-i386/translate.c  | 3806 ++++++++++++++++++++--------------------------
 4 files changed, 1654 insertions(+), 2260 deletions(-)

-- 
1.8.3.1