[clang] [llvm] [RISCV] SiFive CLIC Support (PR #132481)

[Alex Bradbury via llvm-commits]

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@@ -486,6 +486,24 @@ def : SysReg<"mctrctl", 0x34e>;
 // Vendor CSRs
 //===-----------------------------------------------
 
+// XSfmclic
+let FeaturesRequired = [{ {RISCV::FeatureVendorXSfmclic} }] in {
+def : SysReg<"mtvt", 0x307>;
+def : SysReg<"mnxti", 0x345>;
+def : SysReg<"mintstatus", 0x346>;
+def : SysReg<"mscratchcsw", 0x348>;
+def : SysReg<"mscratchcswl", 0x349>;
+}
+
+// XSfsclic
+let FeaturesRequired = [{ {RISCV::FeatureVendorXSfsclic} }] in {
+def : SysReg<"stvt", 0x107>;
+def : SysReg<"snxti", 0x145>;
+def : SysReg<"sintstatus", 0x146>;
+def : SysReg<"sscratchcsw", 0x148>;
+def : SysReg<"sscratchcswl", 0x149>;
+}
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asb wrote:

>From the call, I think we've concluded to go ahead with prefixed versions at least in this PR. We can loop back to discuss separately if there's demand to support the unprefixed form, but ideally we can do sf.* and if people need the old version for downstream users they can carry the alias downstream.

https://github.com/llvm/llvm-project/pull/132481