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

[Yueh-Ting Chen 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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eopXD wrote:

>From intuition I would say the motivation to mask a matrix multiplication may not be strong? To split matrixes, tiling are done. So a masked version is probably not needed. (This is my own personal guess though. Not a math library expert here to back this up with experience.

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