Fixes to support ARMv5 lego mindstorm.

runtime/vm/assembler_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"
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 540 matching lines @@
   if (TargetCPUFeatures::arm_version() == ARMv5TE) {
     nop();
   }
 }
 
 
 void Assembler::stm(BlockAddressMode am, Register base, RegList regs,
                     Condition cond) {
   ASSERT(regs != 0);
   EmitMultiMemOp(cond, am, false, base, regs);
+  if (TargetCPUFeatures::arm_version() == ARMv5TE) {

[regis, 2014/08/13 19:47:39]

Can you add a comment explaining why this is needed?

[zra, 2014/08/13 20:08:55]

Done.

+    nop();
+  }
 }
 
 
 void Assembler::ldrex(Register rt, Register rn, Condition cond) {
   ASSERT(rn != kNoRegister);
   ASSERT(rt != kNoRegister);
   ASSERT(cond != kNoCondition);
   int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
                      B24 |
                      B23 |
@@ skipping 2232 matching lines @@
     tst(rn, Operand(IP), cond);
   }
 }
 
 void Assembler::IntegerDivide(Register result, Register left, Register right,
                               DRegister tmpl, DRegister tmpr) {
   ASSERT(tmpl != tmpr);
   if (TargetCPUFeatures::integer_division_supported()) {
     sdiv(result, left, right);
   } else {
+    ASSERT(TargetCPUFeatures::vfp_supported());
     SRegister stmpl = static_cast<SRegister>(2 * tmpl);
     SRegister stmpr = static_cast<SRegister>(2 * tmpr);
     vmovsr(stmpl, left);
     vcvtdi(tmpl, stmpl);  // left is in tmpl.
     vmovsr(stmpr, right);
     vcvtdi(tmpr, stmpr);  // right is in tmpr.
     vdivd(tmpr, tmpl, tmpr);
     vcvtid(stmpr, tmpr);
     vmovrs(result, stmpr);
   }
@@ skipping 544 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM