Adds support for integer division for ARM chips without the sdiv instruction.

runtime/vm/intermediate_language_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2171 matching lines @@
 LocationSummary* BinarySmiOpInstr::MakeLocationSummary() const {
   const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   LocationSummary* summary =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
   if (op_kind() == Token::kTRUNCDIV) {
     summary->set_in(0, Location::RequiresRegister());
     if (RightIsPowerOfTwoConstant()) {
       ConstantInstr* right_constant = right()->definition()->AsConstant();
       summary->set_in(1, Location::Constant(right_constant->value()));
+      summary->AddTemp(Location::RequiresRegister());
     } else {
       summary->set_in(1, Location::RequiresRegister());
+      summary->AddTemp(Location::RequiresRegister());
+      summary->AddTemp(Location::RequiresFpuRegister());
     }
-    summary->AddTemp(Location::RequiresRegister());
     summary->set_out(Location::RequiresRegister());
     return summary;
   }
   summary->set_in(0, Location::RequiresRegister());
   summary->set_in(1, Location::RegisterOrSmiConstant(right()));
   if (((op_kind() == Token::kSHL) && !is_truncating()) ||
       (op_kind() == Token::kSHR)) {
     summary->AddTemp(Location::RequiresRegister());
   }
   // We make use of 3-operand instructions by not requiring result register
@@ skipping 198 matching lines @@
     case Token::kBIT_XOR: {
       // No overflow check.
       __ eor(result, left, ShifterOperand(right));
       break;
     }
     case Token::kTRUNCDIV: {
       // Handle divide by zero in runtime.
       __ cmp(right, ShifterOperand(0));
       __ b(deopt, EQ);
       Register temp = locs()->temp(0).reg();
+      DRegister dtemp = locs()->temp(1).fpu_reg();
       __ Asr(temp, left, kSmiTagSize);  // SmiUntag left into temp.
       __ Asr(IP, right, kSmiTagSize);  // SmiUntag right into IP.
-      if (!CPUFeatures::integer_division_supported()) {
-        UNIMPLEMENTED();
-      }
-      __ sdiv(result, temp, IP);
+
+      __ IntegerDivide(result, temp, IP, dtemp, DTMP);
+
       // Check the corner case of dividing the 'MIN_SMI' with -1, in which
       // case we cannot tag the result.
       __ CompareImmediate(result, 0x40000000);
       __ b(deopt, EQ);
       __ SmiTag(result);
       break;
     }
     case Token::kSHR: {
       if (CanDeoptimize()) {
         __ CompareImmediate(right, 0);
@@ skipping 1164 matching lines @@
   compiler->GenerateCall(token_pos(),
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM