Adds more ARM64 SIMD instructions.

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, 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_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 859 matching lines @@
   if (Address::CanHoldOffset(offset, Address::Offset, kQWord)) {
     fstrq(src, Address(base, offset, Address::Offset, kQWord));
   } else {
     ASSERT(base != TMP2);
     AddImmediate(TMP2, base, offset, pp);
     fstrq(src, Address(TMP2));
   }
 }
 
 
+void Assembler::VRecps(VRegister vd, VRegister vn) {
+  ASSERT(vn != VTMP);
+  ASSERT(vd != VTMP);
+
+  // Reciprocal estimate.
+  vrecpes(vd, vn);
+  // 2 Newton-Raphson steps.
+  vrecpss(VTMP, vn, vd);
+  vmuls(vd, vd, VTMP);
+  vrecpss(VTMP, vn, vd);
+  vmuls(vd, vd, VTMP);
+}
+
+
+void Assembler::VRSqrts(VRegister vd, VRegister vn) {
+  ASSERT(vn != VTMP);
+  ASSERT(vn != VTMP);

[regis, 2014/05/27 16:04:13]

vn -> vd

[zra, 2014/05/27 16:17:40]

Done.

+
+  // Reciprocal square root estimate.
+  vrsqrtes(vd, vn);
+  // 2 Newton-Raphson steps. xn+1 = xn * (3 - V1*xn^2) / 2.
+  // First step.
+  vmuls(VTMP, vd, vd);  // VTMP <- xn^2
+  vrsqrtss(VTMP, vn, VTMP);  // VTMP <- (3 - V1*VTMP) / 2.
+  vmuls(vd, vd, VTMP);  // xn+1 <- xn * VTMP
+  // Second step.
+  vmuls(VTMP, vd, vd);
+  vrsqrtss(VTMP, vn, VTMP);
+  vmuls(vd, vd, VTMP);
+}
+
+
+
 // Store into object.
 // Preserves object and value registers.
 void Assembler::StoreIntoObjectFilterNoSmi(Register object,
                                            Register value,
                                            Label* no_update) {
   COMPILE_ASSERT((kNewObjectAlignmentOffset == kWordSize) &&
                  (kOldObjectAlignmentOffset == 0));
 
   // Write-barrier triggers if the value is in the new space (has bit set) and
   // the object is in the old space (has bit cleared).
@@ skipping 452 matching lines @@
     LoadImmediate(TMP, tags, pp);
     StoreFieldToOffset(TMP, instance_reg, Object::tags_offset(), pp);
   } else {
     b(failure);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64