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diff --git a/deps/paryfor/paryfor.hpp b/deps/paryfor/paryfor.hpp
index b8ced09..0536580 100644
--- a/deps/paryfor/paryfor.hpp
+++ b/deps/paryfor/paryfor.hpp
@@ -51,6 +51,15 @@ static inline void spin_loop_pause() noexcept {
}
} // namespace atomic_queue
} // namespace paryfor
+#elif defined(__riscv) && (__riscv_xlen == 64)
+namespace paryfor {
+namespace atomic_queue {
+constexpr int CACHE_LINE_SIZE = 64;
+static inline void spin_loop_pause() noexcept {
+ asm volatile ("nop" ::: "memory");
+}
+}
+}
#else
#error "Unknown CPU architecture."
#endif
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