This is an attempt to improve performance of target-sparc by exposing the windowed registers as TCG globals, and all the optimization that we can do there.
This is done via allowing tcg_global_mem_new to be used with any base pointer, not just off of a fixed register. Thus the sparc windowed registers are globals off cpu_regwptr. In the process of working through this, I attempt to remove as many uses of "int" as I can throughout the TCG code gen paths, replacing them with TCGReg when we're talking about hard registers, and TCGTemp pointers when we're talking about temporaries. This, IMO, reduces confusion as to what kind of "int" we mean at any given time. By the time we get to patch 14, actually implementing the indirect temps, it's fairly easy to recurse in order to load the base pointer when we need to load or store an indirect temp. I've not yet tried to measure the performance. As far as testing, linux-user-0.3 and sparc-test-0.2 works. I've scanned some of the dumps from those. In the cases where no real optimization was possible, we generate practically the same code -- usually with different registers selected. In the cases where we can optimize, I've seen some TB's cut in half. Anyway, I wanted some feedback before I take this any further. r~ Richard Henderson (16): tcg: Change tcg_global_mem_new_* to take a TCGv_ptr tcg: Introduce TCGTempType tcg: Change ts->mem_reg to ts->mem_base tcg: Compress TCGLabelQemuLdst tcg: More use of TCGReg where appropriate tcg: Remove tcg_get_arg_str_i32/64 tcg: Change reg_to_temp to TCGTemp pointer tcg: Change temp_dead argument to TCGTemp tcg: Change temp_sync argument to TCGTemp tcg: Change temp_save argument to TCGTemp tcg: Introduce temp_load tcg: Tidy temporary allocation tcg: Use temp_idx tcg: Implement indirect memory registers target-sparc: Tidy global register initialization target-sparc: Use global registers for the register window target-alpha/translate.c | 40 +-- target-arm/translate.c | 20 +- target-cris/translate.c | 24 +- target-cris/translate_v10.c | 82 +++--- target-i386/translate.c | 56 ++-- target-lm32/translate.c | 24 +- target-m68k/translate.c | 28 +- target-microblaze/translate.c | 14 +- target-mips/translate.c | 25 +- target-moxie/translate.c | 8 +- target-openrisc/translate.c | 26 +- target-ppc/translate.c | 40 +-- target-s390x/translate.c | 16 +- target-sh4/translate.c | 36 +-- target-sparc/translate.c | 195 ++++++------- target-unicore32/translate.c | 2 +- target-xtensa/translate.c | 10 +- tcg/tcg.c | 641 +++++++++++++++++++++--------------------- tcg/tcg.h | 78 +++-- 19 files changed, 693 insertions(+), 672 deletions(-) -- 1.8.1.4
