[llvm] [RISCV] Implement Intrinsics and CodeGen Support for XCValu Extension… (PR #78138)

[Craig Topper via llvm-commits]

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@@ -704,3 +749,112 @@ let Predicates = [HasVendorXCVbitmanip, IsRV32] in {
             (CV_BITREV GPR:$rs1, cv_tuimm2:$radix, cv_tuimm5:$pts)>;
   def : Pat<(bitreverse (XLenVT GPR:$rs)), (CV_BITREV GPR:$rs, 0, 0)>;
 }
+
+class PatCoreVAluGpr <string intr, string asm> :
+  PatGpr<!cast<Intrinsic>("int_riscv_cv_alu_" # intr),
+            !cast<RVInst>("CV_" # asm)>;
+class PatCoreVAluGprGpr <string intr, string asm> :
+  PatGprGpr<!cast<Intrinsic>("int_riscv_cv_alu_" # intr),
+               !cast<RVInst>("CV_" # asm)>;
+
+multiclass PatCoreVAluGprImm <Intrinsic intr> {
+  def "CV_" # NAME # "_PSEUDO" :
+    Pseudo<(outs GPR:$rd), (ins GPR:$rs, cv_uimm32:$imm), []>;
+  def : PatGprGpr<intr, !cast<RVInst>("CV_" # NAME # "R")>;
+  def : PatGprImm<intr, !cast<RVInst>("CV_" # NAME # "_PSEUDO"), cv_uimm32>;
+}
+
+multiclass PatCoreVAluGprGprImm <Intrinsic intr> {
+  def "CV_" # NAME # "_PSEUDO" :
+    Pseudo<(outs GPR:$rd), (ins GPR:$rs1, GPR:$rs2, uimm5:$imm), []>;
+  def : Pat<(intr GPR:$rs1, GPR:$rs2, GPR:$rs3),
+            (!cast<RVInst>("CV_" # NAME # "R") GPR:$rs1, GPR:$rs2, GPR:$rs3)>;
+  def : Pat<(intr GPR:$rs1, GPR:$rs2, uimm5:$imm),
+            (!cast<RVInst>("CV_" # NAME # "_PSEUDO") GPR:$rs1, GPR:$rs2,
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topperc wrote:

Why do we need a pseudo instruction for this? It looks like the expansion of the pseudo just copies the operands if the immediate is in the range [0,31] which `uimm5` here already checked for.

https://github.com/llvm/llvm-project/pull/78138