[PATCH] D93298: [RISCV] add the MC layer support of Zfinx extension

[Craig Topper via Phabricator via cfe-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/Support/RISCVISAInfo.cpp:687
   // TODO: This has been removed in later specs, which specify that D implies F
   if (HasD && !HasF)
     return createStringError(errc::invalid_argument,
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Do we need the equivalent of this for Zfinx and Zdinx?


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Comment at: llvm/lib/Target/RISCV/RISCVInstrInfoD.td:228
 
+let Predicates = [HasStdExtZdinx] in {
+def : InstAlias<"fabs.d $rd, $rs", (FSGNJX_D_INX FPR64INX:$rd, FPR64INX:$rs, FPR64INX:$rs)>;
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Don't we need IN32X aliases too?


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Comment at: llvm/lib/Target/RISCV/RISCVRegisterInfo.td:552
+
+def GPRF16 : RegisterClass<"RISCV", [f16], 16, (add
+    (sequence "X%u", 10, 17),
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Is possible to reference GPR here to avoid listing the allocation order again? Similar to how GPRNoX0 does (sub GPR, X0). Not sure if there is a way to be exactly another list.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D93298/new/

https://reviews.llvm.org/D93298