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Improve RISC-V support
- Support 64-bit atomics on riscv32 when Zacas extension is available. (f32463f)
- Support 128-bit atomics on riscv64 when Zacas extension is available. (f32463f)
- Provide all operations when Zalrsc or Zacas extension is available even if A extension is not available. (2668665, 7069c98)
- Optimize atomic CAS when Zacas extension is available. (0d7dc48, ed74261)
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Support PowerPC CPUs without
lwsyncinstruction such as e500. (91812c2, 79f7479) -
Improve support for very legacy CPUs on x86 and MIPS. (02627e2, 2877324, 292f6b3)
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Optimize Arm/AArch64 atomic store/RMWs. (fdea51f)
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Optimize MSP430 atomic RMWs. (e76c112)