PPC: Sign-extended result in DoFlooringDivI/DoDivI on 64bit

src/crankshaft/ppc/lithium-codegen-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/crankshaft/ppc/lithium-codegen-ppc.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
@@ skipping 1122 matching lines @@
         __ isel(overflow, result, dividend, result, cr0);
       } else {
         Label no_overflow_possible;
         __ bnooverflow(&no_overflow_possible, cr0);
         __ mr(result, dividend);
         __ bind(&no_overflow_possible);
       }
     }
   }
 
+#if V8_TARGET_ARCH_PPC64
+  __ extsw(result, result);
+#endif
+
   if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
     // Deoptimize if remainder is not 0.
     Register scratch = scratch0();
     __ mullw(scratch, divisor, result);
     __ cmpw(dividend, scratch);
     DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecision);
   }
 }
 
 
@@ skipping 173 matching lines @@
 #endif
 
   // If there is no remainder then we are done.
   __ mullw(scratch, divisor, result);
   __ cmpw(dividend, scratch);
   __ beq(&done);
 
   // We performed a truncating division. Correct the result.
   __ subi(result, result, Operand(1));
   __ bind(&done);
+#if V8_TARGET_ARCH_PPC64
+  __ extsw(result, result);
+#endif
 }
 
 
 void LCodeGen::DoMultiplyAddD(LMultiplyAddD* instr) {
   DoubleRegister addend = ToDoubleRegister(instr->addend());
   DoubleRegister multiplier = ToDoubleRegister(instr->multiplier());
   DoubleRegister multiplicand = ToDoubleRegister(instr->multiplicand());
   DoubleRegister result = ToDoubleRegister(instr->result());
 
   __ fmadd(result, multiplier, multiplicand, addend);
@@ skipping 4466 matching lines @@
   __ LoadP(result,
            FieldMemOperand(scratch, FixedArray::kHeaderSize - kPointerSize));
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8