[clang] [llvm] [RISCV] Added the MIPS prefetch extensions for MIPS RV64 P8700. (PR #145647)

[Craig Topper via cfe-commits]

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@@ -103,9 +109,41 @@ class SWPFormat<dag outs, dag ins, string opcodestr, string argstr>
   let Inst{6-0} = OPC_CUSTOM_0.Value;
 }
 
+// Prefetch format.
+let hasSideEffects = 0, mayLoad = 1,mayStore = 1 in
+class Mips_prefetch_ri<dag outs, dag ins, string opcodestr, string argstr>
+    : RVInst<outs, ins, opcodestr, argstr, [], InstFormatI> {
+  bits<9> imm9;
+  bits<5> rs1;
+  bits<5> hint;
+
+  let Inst{31 - 29} = 0b000;
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topperc wrote:

No spaces around `-` to be consistent with every other instruction definition in this file.

https://github.com/llvm/llvm-project/pull/145647