PPC/s390: [wasm-simd] Implement i64x2 shifts for arm

Port aafbc138

R=zhin@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I1b6f70fbf58dc9e32f37ecd5e2030f6966a90842
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1929074Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#65105}

src/compiler/backend/ppc/instruction-selector-ppc.cc

@@ -2428,6 +2428,12 @@ void InstructionSelector::VisitI64x2Add(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitI64x2Sub(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitI64x2Shl(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI64x2ShrS(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI64x2ShrU(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {

src/compiler/backend/s390/instruction-selector-s390.cc

@@ -2843,6 +2843,12 @@ void InstructionSelector::VisitI64x2Add(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitI64x2Sub(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitI64x2Shl(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI64x2ShrS(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI64x2ShrU(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {