PPC/s390: [builtins] Port TypedArrayConstructByArrayBuffer to CodeStubAssembler.

Port 06fef85b

Original Commit Message:

    Part of the performance and refactoring work to move the TypedArray
    constructors into CSA. This CL moves ConstructByArrayBuffer from JS
    to CSA.

R=petermarshall@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:5977
LOG=N

Review-Url: https://codereview.chromium.org/2742343005
Cr-Commit-Position: refs/heads/master@{#43756}

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

@@ -1240,6 +1240,10 @@ void InstructionSelector::VisitChangeUint32ToUint64(Node* node) {
   // TODO(mbrandy): inspect input to see if nop is appropriate.
   VisitRR(this, kPPC_Uint32ToUint64, node);
 }
+
+void InstructionSelector::VisitChangeFloat64ToUint64(Node* node) {
+  VisitRR(this, kPPC_DoubleToUint64, node);
+}
 #endif
 
 

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

@@ -1633,6 +1633,10 @@ void InstructionSelector::VisitChangeUint32ToUint64(Node* node) {
   }
   VisitRR(this, kS390_Uint32ToUint64, node);
 }
+
+void InstructionSelector::VisitChangeFloat64ToUint64(Node* node) {
+  VisitRR(this, kS390_DoubleToUint64, node);
+}
 #endif
 
 void InstructionSelector::VisitBitcastInt32ToFloat32(Node* node) {