Add spin_loop hint for RISC-V architecture

This commit also updates `stdarch` git submodule.
matthiaskrgr · Dec 5, 2021 · 70855b2 · 70855b2
1 parent bdaa901
commit 70855b2
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diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs
@@ -137,6 +137,11 @@ pub fn spin_loop() {
             unsafe { crate::arch::arm::__yield() };
         }
     }
+
+    #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+    {
+        crate::arch::riscv::pause();
+    }
 }
 
 /// An identity function that *__hints__* to the compiler to be maximally pessimistic about what

diff --git a/library/stdarch b/library/stdarch