[clang] [llvm] [RISC-V] Added the mips extension instructions like ehb,ihb and pause etc for MIPS RV64 P8700. (PR #155747)

[Craig Topper via llvm-commits]

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@@ -1396,20 +1396,27 @@ def HasVendorXMIPSCMov
       AssemblerPredicate<(all_of FeatureVendorXMIPSCMov),
                          "'Xmipscmov' ('mips.ccmov' instruction)">;
 def UseCCMovInsn : Predicate<"Subtarget->useCCMovInsn()">;
+
 def FeatureVendorXMIPSLSP
     : RISCVExtension<1, 0, "MIPS optimization for hardware load-store bonding">;
 def HasVendorXMIPSLSP
     : Predicate<"Subtarget->hasVendorXMIPSLSP()">,
       AssemblerPredicate<(all_of FeatureVendorXMIPSLSP),
                          "'Xmipslsp' (load and store pair instructions)">;
-def FeatureVendorXMIPSCBOP
-    : RISCVExtension<1, 0, "MIPS Software Prefetch">;
+
+def FeatureVendorXMIPSCBOP : RISCVExtension<1, 0, "MIPS Software Prefetch">;
 def HasVendorXMIPSCBOP
     : Predicate<"Subtarget->hasVendorXMIPSCBOP()">,
       AssemblerPredicate<(all_of FeatureVendorXMIPSCBOP),
                          "'Xmipscbop' (MIPS hardware prefetch)">;
 def NoVendorXMIPSCBOP : Predicate<"!Subtarget->hasVendorXMIPSCBOP()">;
 
+def FeatureVendorXMIPSEXECTL : RISCVExtension<1, 0, "MIPS extensions">;
+def HasVendorXMIPSEXECTL
+    : Predicate<"Subtarget->hasVendorXMIPSEXT()">,
+      AssemblerPredicate<(all_of FeatureVendorXMIPSEXECTL),
+                         "'Xmipsexectl' (Mips extensions)">;
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topperc wrote:

"Mips extensions" sounds very generic. Guessing from the name should this be something like "Mips execution control"?

https://github.com/llvm/llvm-project/pull/155747