• Ard Biesheuvel's avatar
    int128: move __uint128_t compiler test to Kconfig · c12d3362
    Ard Biesheuvel authored
    In order to use 128-bit integer arithmetic in C code, the architecture
    needs to have declared support for it by setting ARCH_SUPPORTS_INT128,
    and it requires a version of the toolchain that supports this at build
    time. This is why all existing tests for ARCH_SUPPORTS_INT128 also test
    whether __SIZEOF_INT128__ is defined, since this is only the case for
    compilers that can support 128-bit integers.
    
    Let's fold this additional test into the Kconfig declaration of
    ARCH_SUPPORTS_INT128 so that we can also use the symbol in Makefiles,
    e.g., to decide whether a certain object needs to be included in the
    first place.
    
    Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
    Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    c12d3362
ecc.c 38.3 KB