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Implement pause support for RISC-V #65

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merged 2 commits into from
Jan 15, 2024
Merged

Implement pause support for RISC-V #65

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38fa369
Implement pause support for RISC-V
XieJiSS Oct 24, 2023
ce34f07
fix: remove rocket-specific code introduced from the kernel
XieJiSS Jan 15, 2024
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7 changes: 7 additions & 0 deletions include/boost/atomic/detail/pause.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,13 @@ BOOST_FORCEINLINE void pause() BOOST_NOEXCEPT
__asm__ __volatile__("pause;" : : : "memory");
#elif (defined(__ARM_ARCH) && __ARM_ARCH >= 8) || defined(__ARM_ARCH_8A__) || defined(__aarch64__)
__asm__ __volatile__("yield;" : : : "memory");
#elif defined(__riscv) && __riscv_xlen == 64
#if defined(__riscv_zihintpause)
__asm__ __volatile__("pause" : : : "memory");
#else
/* Encoding of the pause instruction */
__asm__ __volatile__ (".4byte 0x100000F");
#endif
#endif
#endif
}
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