[clang] [llvm] [RISCV][P-ext] Support Packed Narrowing Zip (PR #210040)

[via cfe-commits]

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@@ -2838,6 +2852,17 @@ let append Predicates = [IsRV64] in {
             (ZIP8P GPR:$rs1, GPR:$rs2)>;
   def : Pat<(v4i16 (riscv_pzip (v4i16 GPR:$rs1), (v4i16 GPR:$rs2))),
             (ZIP16P GPR:$rs1, GPR:$rs2)>;
+
+  // Packed narrowing zip: pair the low (even) / high (odd) byte/halfword of
+  // each widened element of rs1 and rs2.
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TelGome wrote:

done

https://github.com/llvm/llvm-project/pull/210040