Avoids vmovsr on ARM.

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 673 matching lines @@
   int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
                      B27 | B26 | B22 | B20 |
                      (static_cast<int32_t>(rt2)*B16) |
                      (static_cast<int32_t>(rt)*B12) | B11 | B9 |
                      ((static_cast<int32_t>(sm) & 1)*B5) | B4 |
                      (static_cast<int32_t>(sm) >> 1);
   Emit(encoding);
 }
 
 
+void Assembler::vmovdr(DRegister dn, int i, Register rt, Condition cond) {
+  ASSERT(TargetCPUFeatures::vfp_supported());
+  ASSERT((i == 0) || (i == 1));
+  ASSERT(rt != kNoRegister);
+  ASSERT(rt != SP);
+  ASSERT(rt != PC);
+  ASSERT(dn != kNoDRegister);
+  ASSERT(cond != kNoCondition);
+  int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+                     B27 | B26 | B25 |
+                     (i*B21) |
+                     (static_cast<int32_t>(rt)*B12) | B11 | B9 | B8 |
+                     ((static_cast<int32_t>(dn) >> 4)*B7) |
+                     ((static_cast<int32_t>(dn) & 0xf)*B16) | B4;
+  Emit(encoding);
+}
+
+
 void Assembler::vmovdrr(DRegister dm, Register rt, Register rt2,
                         Condition cond) {
   ASSERT(TargetCPUFeatures::vfp_supported());
   ASSERT(dm != kNoDRegister);
   ASSERT(rt != kNoRegister);
   ASSERT(rt != SP);
   ASSERT(rt != PC);
   ASSERT(rt2 != kNoRegister);
   ASSERT(rt2 != SP);
   ASSERT(rt2 != PC);
@@ skipping 1743 matching lines @@
   } else if (Operand::CanHold(~value, &o)) {
     mvn(rd, o, cond);
   } else {
     LoadDecodableImmediate(rd, value, cond);
   }
 }
 
 
 void Assembler::LoadSImmediate(SRegister sd, float value, Condition cond) {
   if (!vmovs(sd, value, cond)) {
+    const DRegister dd = static_cast<DRegister>(sd >> 1);
+    const int index = sd & 1;
     LoadImmediate(IP, bit_cast<int32_t, float>(value), cond);
-    vmovsr(sd, IP, cond);
+    vmovdr(dd, index, IP, cond);
   }
 }
 
 
 void Assembler::LoadDImmediate(DRegister dd,
                                double value,
                                Register scratch,
                                Condition cond) {
   ASSERT(scratch != PC);
   ASSERT(scratch != IP);
@@ skipping 927 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