[llvm] [RISCV] Re-implement Zacas MC layer support to make it usable for CodeGen. (PR #77418)

[Yingwei Zheng via llvm-commits]

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@@ -546,6 +546,10 @@ DecodeStatus RISCVDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
                       !STI.hasFeature(RISCV::Feature64Bit),
                   DecoderTableRV32Zdinx32,
                   "RV32Zdinx table (Double in Integer and rv32)");
+    TRY_TO_DECODE(STI.hasFeature(RISCV::FeatureStdExtZacas) &&
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dtcxzyw wrote:

Tests?

https://github.com/llvm/llvm-project/pull/77418