Add native gchelper support for 64 bits RISC-V RV64I targets.
Now that RV64 is under CI, this also enables platform-specific ghelper
in the Unix port.
Also changes the data type holding the register contents to something more
appropriate, so in the remote eventuality somebody wants to use this with
RV128 all they have to do is update the `__riscv_xlen` check.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>
This commit moves all first-party code developed for this project from lib/
to shared/, so that lib/ now only contains third-party code.
The following directories are moved as-is from lib to shared:
lib/libc -> shared/libc
lib/memzip -> shared/memzip
lib/netutils -> shared/netutils
lib/timeutils -> shared/timeutils
lib/upytesthelper -> shared/upytesthelper
All files in lib/embed/ have been moved to shared/libc/.
lib/mp-readline has been moved to shared/readline.
lib/utils has been moved to shared/runtime, with the exception of
lib/utils/printf.c which has been moved to shared/libc/printf.c.
Signed-off-by: Damien George <damien@micropython.org>
