On 8/6/23 04:55, Nicholas Piggin wrote:
On Sat Aug 5, 2023 at 7:33 AM AEST, Richard Henderson wrote:
Emit one 64-bit instruction for large constants and pc-relatives.
With pc-relative addressing, we don't need REG_TB, which means we
can re-enable direct branching for goto_tb.
Very cool. I tested this on a POWER10 and it has been stable so
far. Using mttcg with SMP 8 machine, with this patch, a parallel
gcc compile job in a Linux distro is 11.5% faster. Is such a big
improvment expected?
Possibly, given that we had to disable direct branch patching for USE_REG_TB.
r~
