PPC/s390: [turbofan] Add Float32(Max|Min) machine operators.

Port 2027b0be

Original commit message:

    The new operators are implemented similar to the Float64(Max|Min) which
    already exist. The purpose of the new operators is the implementation
    of the F32Max and F32Min instructions in WebAssembly.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2263383002
Cr-Commit-Position: refs/heads/master@{#38803}

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

@@ -1310,6 +1310,9 @@ void InstructionSelector::VisitFloat64Mod(Node* node) {
        g.UseFixed(node->InputAt(1), d2))->MarkAsCall();
 }
 
+void InstructionSelector::VisitFloat32Max(Node* node) {
+  VisitRRR(this, kPPC_MaxDouble | MiscField::encode(1), node);
+}
 
 void InstructionSelector::VisitFloat64Max(Node* node) {
   VisitRRR(this, kPPC_MaxDouble, node);
@@ -1320,6 +1323,9 @@ void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
   VisitRR(this, kPPC_Float64SilenceNaN, node);
 }
 
+void InstructionSelector::VisitFloat32Min(Node* node) {
+  VisitRRR(this, kPPC_MinDouble | MiscField::encode(1), node);
+}
 
 void InstructionSelector::VisitFloat64Min(Node* node) {
   VisitRRR(this, kPPC_MinDouble, node);

src/compiler/s390/instruction-codes-s390.h

@@ -78,7 +78,9 @@ namespace compiler {
   V(S390_CeilDouble)               \
   V(S390_TruncateDouble)           \
   V(S390_RoundDouble)              \
+  V(S390_MaxFloat)                 \
   V(S390_MaxDouble)                \
+  V(S390_MinFloat)                 \
   V(S390_MinDouble)                \
   V(S390_AbsDouble)                \
   V(S390_Cntlz32)                  \

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

@@ -79,7 +79,9 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kS390_CeilDouble:
     case kS390_TruncateDouble:
     case kS390_RoundDouble:
+    case kS390_MaxFloat:
     case kS390_MaxDouble:
+    case kS390_MinFloat:
     case kS390_MinDouble:
     case kS390_AbsDouble:
     case kS390_Cntlz32:

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

@@ -1337,6 +1337,10 @@ void InstructionSelector::VisitFloat64Mod(Node* node) {
       ->MarkAsCall();
 }
 
+void InstructionSelector::VisitFloat32Max(Node* node) {
+  VisitRRR(this, kS390_MaxFloat, node);
+}
+
 void InstructionSelector::VisitFloat64Max(Node* node) {
   VisitRRR(this, kS390_MaxDouble, node);
 }
@@ -1345,6 +1349,10 @@ void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
   VisitRR(this, kS390_Float64SilenceNaN, node);
 }
 
+void InstructionSelector::VisitFloat32Min(Node* node) {
+  VisitRRR(this, kS390_MinFloat, node);
+}
+
 void InstructionSelector::VisitFloat64Min(Node* node) {
   VisitRRR(this, kS390_MinDouble, node);
 }