libgcc/ChangeLog:

2017-02-06  Palmer Dabbelt <palmer@dabbelt.com>

        * config.host: Add RISC-V tuples.
        * config/riscv/atomic.c: New file.
        * config/riscv/crti.S: Likewise.
        * config/riscv/crtn.S: Likewise.
        * config/riscv/div.S: Likewise.
        * config/riscv/linux-unwind.h: Likewise.
        * config/riscv/muldi3.S: Likewise.
        * config/riscv/multi3.S: Likewise.
        * config/riscv/save-restore.S: Likewise.
        * config/riscv/sfp-machine.h: Likewise.
        * config/riscv/t-elf: Likewise.
        * config/riscv/t-elf32: Likewise.
        * config/riscv/t-elf64: Likewise.
        * config/riscv/t-softfp32: Likewise.
        * config/riscv/t-softfp64: Likewise.

From-SVN: r245226