[clang] [llvm] [RISCV] Add CSRs and an instruction for Smctr and Ssctr extensions. (PR #105148)

[Yingwei Zheng via llvm-commits]

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@@ -839,6 +839,14 @@ def HLV_D   : HLoad_r<0b0110110, 0b00000, "hlv.d">, Sched<[]>;
 def HSV_D   : HStore_rr<0b0110111, "hsv.d">, Sched<[]>;
 }
 
+let Predicates = [HasStdExtSmctrOrSsctr] in {
+def SCTRCLR : Priv<"sctrclr", 0b0001000>, Sched<[]> {
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dtcxzyw wrote:

Missing MC tests for `sctrclr`.

https://github.com/llvm/llvm-project/pull/105148