PPC: [turbofan] Introduce integer multiplication with overflow.

src/compiler/ppc/code-generator-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 957 matching lines @@
     case kArchPrepareCallCFunction: {
       int const num_parameters = MiscField::decode(instr->opcode());
       __ PrepareCallCFunction(num_parameters, kScratchReg);
       // Frame alignment requires using FP-relative frame addressing.
       frame_access_state()->SetFrameAccessToFP();
       break;
     }
     case kArchPrepareTailCall:
       AssemblePrepareTailCall();
       break;
+    case kArchComment: {
+      Address comment_string = i.InputExternalReference(0).address();
+      __ RecordComment(reinterpret_cast<const char*>(comment_string));
+      break;
+    }
     case kArchCallCFunction: {
       int const num_parameters = MiscField::decode(instr->opcode());
       if (instr->InputAt(0)->IsImmediate()) {
         ExternalReference ref = i.InputExternalReference(0);
         __ CallCFunction(ref, num_parameters);
       } else {
         Register func = i.InputRegister(0);
         __ CallCFunction(func, num_parameters);
       }
       frame_access_state()->SetFrameAccessToDefault();
@@ skipping 305 matching lines @@
     case kPPC_Mul32:
       __ mullw(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
                LeaveOE, i.OutputRCBit());
       break;
 #if V8_TARGET_ARCH_PPC64
     case kPPC_Mul64:
       __ mulld(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
                LeaveOE, i.OutputRCBit());
       break;
 #endif
+
+    case kPPC_Mul32WithHigh32:
+      if (i.OutputRegister(0).is(i.InputRegister(0)) ||
+          i.OutputRegister(0).is(i.InputRegister(1)) ||
+          i.OutputRegister(1).is(i.InputRegister(0)) ||
+          i.OutputRegister(1).is(i.InputRegister(1))) {
+        __ mullw(kScratchReg,
+                 i.InputRegister(0), i.InputRegister(1));  // low
+        __ mulhw(i.OutputRegister(1),
+                 i.InputRegister(0), i.InputRegister(1));  // high
+        __ mr(i.OutputRegister(0), kScratchReg);
+      } else {
+        __ mullw(i.OutputRegister(0),
+                 i.InputRegister(0), i.InputRegister(1));  // low
+        __ mulhw(i.OutputRegister(1),
+                 i.InputRegister(0), i.InputRegister(1));  // high
+      }
+      break;
     case kPPC_MulHigh32:
       __ mulhw(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
                i.OutputRCBit());
       break;
     case kPPC_MulHighU32:
       __ mulhwu(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
                 i.OutputRCBit());
       break;
     case kPPC_MulDouble:
       ASSEMBLE_FLOAT_BINOP_RC(fmul, MiscField::decode(instr->opcode()));
@@ skipping 1031 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8