[clang] [RISCV] Support Xsfvqmaccdod and Xsfvqmaccqoq extensions (PR #68295)

[Shao-Ce SUN via cfe-commits]

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@@ -0,0 +1,57 @@
+# RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+v,+xsfvqmaccqoq,+xsfvqmaccdod %s \
+# RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+# RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
+# RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
+# RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+v,+xsfvqmaccqoq,+xsfvqmaccdod %s \
+# RUN:        | llvm-objdump -d --mattr=+v,+xsfvqmaccqoq,+xsfvqmaccdod - \
+# RUN:        | FileCheck %s --check-prefix=CHECK-INST
+# RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+v,+xsfvqmaccqoq,+xsfvqmaccdod %s \
+# RUN:        | llvm-objdump -d - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+
+sf.vqmaccu.2x8x2 v8, v4, v20
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sunshaoce wrote:

I don't understand something, why aren't there any with `v0.t`?

https://github.com/llvm/llvm-project/pull/68295