PPC/s390: [wasm-simd][arm] Implement integer absolute

Port 34f9bcdb

Original Commit Message:

    Implements i8x16.abs, i16x8.abs, and i32x4.abs.

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

Change-Id: Ib32356532965a2187a8e8d9ec2cff44585020f0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2084641Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#66565}

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

@@ -2457,6 +2457,12 @@ void InstructionSelector::VisitF64x2Max(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitLoadTransform(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitI8x16Abs(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI16x8Abs(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI32x4Abs(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {

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

@@ -2835,6 +2835,12 @@ void InstructionSelector::VisitI64x2Mul(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitLoadTransform(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitI8x16Abs(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI16x8Abs(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitI32x4Abs(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {