I happened to notice the ppc backend had a dependency on the placement of the prologue, which has just changed. There is a 32 byte window at code_gen_buffer + 16MB where we might do the wrong thing.
The second patch reduces the code size reserved for performing goto_tb from 7 insns to 4. We probably haven't emitted all 7 insns for quite some time, since the TCG_REG_RA patch went in. But in the process, allow for the atomic update of the insns, something that I could see being required eventually. The third patch is a guess. But it matches the preferences in gcc, giving out-of-order processors a tad more freedom by avoiding cr0 when possible. Anyway, I've been running an alpha guest on a ppc64le host with these patches for a week now. r~ Richard Henderson (3): tcg/ppc: Adjust exit_tb for change in prologue placement tcg/ppc: Revise goto_tb implementation tcg/ppc: Prefer mask over andi. tcg/ppc/tcg-target.c | 79 ++++++++++++++++++++++++++++++++++------------------ translate-all.c | 2 ++ 2 files changed, 54 insertions(+), 27 deletions(-) -- 2.4.3
