[llvm] [RISC-V] Add P-ext MC Support for More Pair Operations (PR #154088)

[Craig Topper via llvm-commits]

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@@ -673,3 +673,141 @@ plui.dh tp, 32
 # CHECK-ASM-AND-OBJ: plui.dh tp, -412
 # CHECK-ASM: encoding: [0x1b,0x22,0x99,0x70]
 plui.dh tp, 612
+# CHECK-ASM-AND-OBJ: predsum.dhs s0, t3, a0
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topperc wrote:

Missing tests for page 19

https://github.com/llvm/llvm-project/pull/154088