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79a8229fb5
Make code more compatible with gcc. Change __atomic_store __atomic_load __atomic_exchange __atomic_compare_exchange Also add (include/stdatomic.h, lib/stdatomic.c): atomic_thread_fence atomic_signal_fence atomic_is_lock_free And gcc extensions (tcctok.h, tccgen.c, lib/stdatomic.c): __atomic_fetch_nand __atomic_and_fetch __atomic_sub_fetch __atomic_or_fetch __atomic_xor_fetch __atomic_and_fetch __atomic_nand_fetch Add new file lib/atomic.S with assembly code for __atomic_compare_exchange_n for arm/arm64/riscv. Also update lib/Makefile. Update testcode in 124_atomic_counter and 125_atomic_misc to test new functions. Also update tests/tests2/Makefile to run tests on arm/arm64/riscv.