Fixes to support ARMv5 lego mindstorm.

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 "vm/cpu.h"
@@ skipping 3003 matching lines @@
             // IP: result bits 32..63.
             __ cmp(IP, Operand(result, ASR, 31));
             __ b(deopt, NE);
           } else {
             if (TargetCPUFeatures::arm_version() == ARMv7) {
               __ LoadImmediate(IP, value);
               __ smull(result, IP, left, IP);
               // IP: result bits 32..63.
               __ cmp(IP, Operand(result, ASR, 31));
               __ b(deopt, NE);
-            } else {
+            } else if (TargetCPUFeatures::can_divide()) {
               const QRegister qtmp = locs()->temp(0).fpu_reg();
               const DRegister dtmp0 = EvenDRegisterOf(qtmp);
               const DRegister dtmp1 = OddDRegisterOf(qtmp);
               __ LoadImmediate(IP, value);
               __ CheckMultSignedOverflow(left, IP, result, dtmp0, dtmp1, deopt);
               __ mul(result, left, IP);
+            } else {
+              __ b(deopt);
             }
           }
         }
         break;
       }
       case Token::kTRUNCDIV: {
         const intptr_t value = Smi::Cast(constant).Value();
         if (value == 1) {
           __ MoveRegister(result, left);
           break;
@@ skipping 112 matching lines @@
     case Token::kMUL: {
       __ SmiUntag(IP, left);
       if (deopt == NULL) {
         __ mul(result, IP, right);
       } else {
         if (TargetCPUFeatures::arm_version() == ARMv7) {
           __ smull(result, IP, IP, right);
           // IP: result bits 32..63.
           __ cmp(IP, Operand(result, ASR, 31));
           __ b(deopt, NE);
-        } else {
+        } else if (TargetCPUFeatures::can_divide()) {
           const QRegister qtmp = locs()->temp(0).fpu_reg();
           const DRegister dtmp0 = EvenDRegisterOf(qtmp);
           const DRegister dtmp1 = OddDRegisterOf(qtmp);
           __ CheckMultSignedOverflow(IP, right, result, dtmp0, dtmp1, deopt);
           __ mul(result, IP, right);
+        } else {
+          __ b(deopt);
         }
       }
       break;
     }
     case Token::kBIT_AND: {
       // No overflow check.
       __ and_(result, left, Operand(right));
       break;
     }
     case Token::kBIT_OR: {
       // No overflow check.
       __ orr(result, left, Operand(right));
       break;
     }
     case Token::kBIT_XOR: {
       // No overflow check.
       __ eor(result, left, Operand(right));
       break;
     }
     case Token::kTRUNCDIV: {
       if ((right_range == NULL) || right_range->Overlaps(0, 0)) {
         // Handle divide by zero in runtime.
         __ cmp(right, Operand(0));
         __ b(deopt, EQ);
       }
       const Register temp = locs()->temp(0).reg();
-      const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
-      __ SmiUntag(temp, left);
-      __ SmiUntag(IP, right);
-
-      __ IntegerDivide(result, temp, IP, dtemp, DTMP);
+      if (TargetCPUFeatures::can_divide()) {
+        const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
+        __ SmiUntag(temp, left);
+        __ SmiUntag(IP, right);
+        __ IntegerDivide(result, temp, IP, dtemp, DTMP);
+      } else {
+        __ b(deopt);
+      }
 
       // 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::kMOD: {
       if ((right_range == NULL) || right_range->Overlaps(0, 0)) {
         // Handle divide by zero in runtime.
         __ cmp(right, Operand(0));
         __ b(deopt, EQ);
       }
       const Register temp = locs()->temp(0).reg();
-      const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
-      __ SmiUntag(temp, left);
-      __ SmiUntag(IP, right);
-
-      __ IntegerDivide(result, temp, IP, dtemp, DTMP);
-
+      if (TargetCPUFeatures::can_divide()) {
+        const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
+        __ SmiUntag(temp, left);
+        __ SmiUntag(IP, right);
+        __ IntegerDivide(result, temp, IP, dtemp, DTMP);
+      } else {
+        __ b(deopt);
+      }
       __ SmiUntag(IP, right);
       __ mls(result, IP, result, temp);  // result <- left - right * result
       __ SmiTag(result);
       //  res = left % right;
       //  if (res < 0) {
       //    if (right < 0) {
       //      res = res - right;
       //    } else {
       //      res = res + right;
       //    }
@@ skipping 2156 matching lines @@
     PairLocation* pair = locs()->out(0).AsPairLocation();
     const Register result_div = pair->At(0).reg();
     const Register result_mod = pair->At(1).reg();
     Range* right_range = InputAt(1)->definition()->range();
     if ((right_range == NULL) || right_range->Overlaps(0, 0)) {
       // Handle divide by zero in runtime.
       __ cmp(right, Operand(0));
       __ b(deopt, EQ);
     }
     const Register temp = locs()->temp(0).reg();
-    const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
-
-    __ SmiUntag(temp, left);
-    __ SmiUntag(IP, right);
-
-    __ IntegerDivide(result_div, temp, IP, dtemp, DTMP);
+    if (TargetCPUFeatures::can_divide()) {
+      const DRegister dtemp = EvenDRegisterOf(locs()->temp(1).fpu_reg());
+      __ SmiUntag(temp, left);
+      __ SmiUntag(IP, right);
+      __ IntegerDivide(result_div, temp, IP, dtemp, DTMP);
+    } else {
+      __ b(deopt);
+    }
 
     // Check the corner case of dividing the 'MIN_SMI' with -1, in which
     // case we cannot tag the result.
     __ CompareImmediate(result_div, 0x40000000);
     __ b(deopt, EQ);
     __ SmiUntag(IP, right);
     // result_mod <- left - right * result_div.
     __ mls(result_mod, IP, result_div, temp);
     __ SmiTag(result_div);
     __ SmiTag(result_mod);
@@ skipping 1250 matching lines @@
   compiler->GenerateCall(token_pos(), &label, stub_kind_, locs());
 #if defined(DEBUG)
   __ LoadImmediate(R4, kInvalidObjectPointer);
   __ LoadImmediate(R5, kInvalidObjectPointer);
 #endif
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM