Avoids vmovsr on ARM.

runtime/vm/assembler_arm_test.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/os.h"
@@ skipping 89 matching lines @@
 ASSEMBLER_TEST_GENERATE(Vmov, assembler) {
   if (TargetCPUFeatures::vfp_supported()) {
     __ mov(R3, Operand(43));
     __ mov(R1, Operand(41));
     __ vmovsrr(S1, R1, R3);  // S1:S2 = 41:43
     __ vmovs(S0, S2);  // S0 = S2, S0:S1 == 43:41
     __ vmovd(D2, D0);  // D2 = D0, S4:S5 == 43:41
     __ vmovrs(R3, S5);  // R3 = S5, R3 == 41
     __ vmovrrs(R1, R2, S4);  // R1:R2 = S4:S5, R1:R2 == 43:41
     __ vmovdrr(D3, R3, R2);  // D3 = R3:R2, S6:S7 == 41:41
-    __ vmovsr(S7, R1);  // S7 = R1, S6:S7 == 41:43
+    __ vmovdr(D3, 1, R1);  // S7 = R1, S6:S7 == 41:43

[regis, 2014/09/25 22:04:01]

D3[1] == S7 = R1

[zra, 2014/09/25 22:08:25]

Done.

     __ vmovrrd(R0, R1, D3);  // R0:R1 = D3, R0:R1 == 41:43
     __ sub(R0, R1, Operand(R0));  // 43-41
   } else {
     __ LoadImmediate(R0, 2);
   }
   __ bx(LR);
 }
 
 
 ASSEMBLER_TEST_RUN(Vmov, test) {
@@ skipping 3955 matching lines @@
   __ StoreIntoObject(R2,
                      FieldAddress(R2, GrowableObjectArray::data_offset()),
                      R1);
   __ PopList((1 << CTX) | (1 << LR));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM