[PATCH] D138418: [LoongArch] Add remaining intrinsics for CRC check instructions

[Lu Weining via Phabricator via llvm-commits]

SixWeining added inline comments.


================
Comment at: llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp:925-933
+    case Intrinsic::loongarch_crc_w_b_w: {
+      Results.push_back(DAG.getNode(
+          ISD::TRUNCATE, DL, VT,
+          DAG.getNode(LoongArchISD::CRC_W_B_W, DL, MVT::i64,
+                      DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Op2),
+                      DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Op3))));
+      Results.push_back(N->getOperand(0));
----------------
Can we define a marco but not repeating similar codes?
For example:
```
#define CRC_CASE(NAME, ISD) \
    case Intrinsic::loongarch_#NAME: { \
      Results.push_back(DAG.getNode( \
          ISD::TRUNCATE, DL, VT, \
          DAG.getNode(LoongArchISD::#ISD, DL, MVT::i64, \
                      DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Op2), \
                      DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Op3)))); \
      Results.push_back(N->getOperand(0)); \
      break; \
    }
```

Then
```
CRC_CASE(crc_w_b_w, CRC_W_B_W)
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138418/new/

https://reviews.llvm.org/D138418