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Add XCHAL definitions for S32C1I and EXCLUSIVE options to
xtensa-config.h, include it in places that implement atomic operations
and add implementations with exclusive access option opcodes.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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Replace "a" constraints with "+m" to avoid forcing atomic variable
address into a register and let the compiler use non-zero offset in
load/store opcodes.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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Linuxthreads.new isn't really useful with the existence
of NPTL/TLS for well supported architectures. There is no
reason to use LT.new for ARM/MIPS or other architectures
supporting NPTL/TLS. It is not available for noMMU architectures
like Blackfin or FR-V. To simplify the live of the few uClibc-ng
developers, LT.new is removed and LT.old is renamed to LT.
LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
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This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
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