[Qemu-devel] [PATCH 0/5] TCG global gen_opc_ arrays clean-up

[Evgeny Voevodin]

This set of patches moves global variables to tcg_ctx:
gen_opc_instr
gen_opparam_icount
gen_opc_pc

Build tested for all targets.
Execution tested on Exynos4210 target.

After this patchset was aplied,
I noticed no speed-up or slow-down of code generation.

Here is the test procedure:
1. Boot Linux Kernel 5 times.
2. For each iteration wait while "JIT cycles" is stable for ~10 seconds
3. Write down the "cycles/op"

Here are the results (tested on gcc-4.6):

Before clean-up:
min: 655.5
max: 659.3
avg: 657.2
standard deviation: ~2 ~= 0.4%

Average cycles/op = 657 +- 2



After clean-up:
min: 654.6
max: 657.1
avg: 655.5
standard deviation: ~1 ~= 0.2%

Average cycles/op = 656 +- 1

Evgeny Voevodin (5):
  tcg/tcg.h: Duplicate global TCG gen_opc_ arrays into TCGContext.
  TCG: Use gen_opc_pc from context instead of global variable.
  TCG: Use gen_opc_icount from context instead of global variable.
  TCG: Use gen_opc_instr_start from context instead of global variable.
  TCG: Remove unused global gen_opc_ arrays.

 exec-all.h                    |    4 ----
 target-alpha/translate.c      |   12 ++++++------
 target-arm/translate.c        |   12 ++++++------
 target-cris/translate.c       |   14 +++++++-------
 target-i386/translate.c       |   19 ++++++++++---------
 target-lm32/translate.c       |   12 ++++++------
 target-m68k/translate.c       |   12 ++++++------
 target-microblaze/translate.c |   12 ++++++------
 target-mips/translate.c       |   12 ++++++------
 target-openrisc/translate.c   |   12 ++++++------
 target-ppc/translate.c        |   12 ++++++------
 target-s390x/translate.c      |   12 ++++++------
 target-sh4/translate.c        |   12 ++++++------
 target-sparc/translate.c      |   12 ++++++------
 target-unicore32/translate.c  |   12 ++++++------
 target-xtensa/translate.c     |   10 +++++-----
 tcg/tcg.h                     |    3 +++
 translate-all.c               |    9 +++------
 18 files changed, 100 insertions(+), 103 deletions(-)

-- 
1.7.9.5