Debian packages that has this binary:
/usr/aarch64-linux-gnu/bin/as
/usr/arm-linux-gnueabi/bin/as
/usr/arm-linux-gnueabihf/bin/as
/usr/lib/arm-none-eabi/bin/as
/usr/h8300-hitachi-coff/bin/as
/usr/i586-linux-gnu/bin/as
/usr/mips64el-linux-gnuabi64/bin/as
/usr/mipsel-linux-gnu/bin/as
/usr/mips-linux-gnu/bin/as
/usr/powerpc64le-linux-gnu/bin/as
/usr/powerpc-linux-gnu/bin/as