DBC: Implement OneByteStringFromCharCode and StringToCharCode.

runtime/vm/intermediate_language_dbc.cc

 // Copyright (c) 2016, 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_DBC.
 #if defined(TARGET_ARCH_DBC)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/cpu.h"
@@ skipping 37 matching lines @@
   M(BinaryDoubleOp)                                                            \
   M(MathUnary)                                                                 \
   M(MathMinMax)                                                                \
   M(Box)                                                                       \
   M(Unbox)                                                                     \
   M(BoxInt64)                                                                  \
   M(CaseInsensitiveCompareUC16)                                                \
   M(BinaryMintOp)                                                              \
   M(ShiftMintOp)                                                               \
   M(UnaryMintOp)                                                               \
-  M(StringToCharCode)                                                          \
-  M(OneByteStringFromCharCode)                                                 \
   M(InvokeMathCFunction)                                                       \
   M(MergedMath)                                                                \
   M(GuardFieldClass)                                                           \
   M(GuardFieldLength)                                                          \
   M(IfThenElse)                                                                \
   M(BinaryFloat32x4Op)                                                         \
   M(Simd32x4Shuffle)                                                           \
   M(Simd32x4ShuffleMix)                                                        \
   M(Simd32x4GetSignMask)                                                       \
   M(Float32x4Constructor)                                                      \
@@ skipping 522 matching lines @@
   } else {
     __ NativeCall();
   }
   compiler->RecordSafepoint(locs());
   compiler->AddCurrentDescriptor(RawPcDescriptors::kOther,
                                  Thread::kNoDeoptId,
                                  token_pos());
 }
 
 
+EMIT_NATIVE_CODE(OneByteStringFromCharCode,
+                 1, Location::RequiresRegister(),
+                 LocationSummary::kNoCall) {
+  ASSERT(compiler->is_optimizing());
+  Register char_code = locs()->in(0).reg();  // Char code is a smi.

[zra, 2016/06/29 14:34:12]

const Register

[rmacnak, 2016/06/29 16:44:16]

Done.

+  Register result = locs()->out(0).reg();
+  __ OneByteStringFromCharCode(result, char_code);
+}
+
+
+EMIT_NATIVE_CODE(StringToCharCode,
+                 1, Location::RequiresRegister(),
+                 LocationSummary::kNoCall) {
+  ASSERT(cid_ == kOneByteStringCid);
+  Register str = locs()->in(0).reg();
+  Register result = locs()->out(0).reg();  // Result char code is a smi.
+  __ StringToCharCode(result, str);
+}
+
+
+
 EMIT_NATIVE_CODE(AllocateObject,
                  0, Location::RequiresRegister(),
                  LocationSummary::kCall) {
   if (ArgumentCount() == 1) {
     __ PushConstant(cls());
     __ AllocateT();
     compiler->AddCurrentDescriptor(RawPcDescriptors::kOther,
                                    Thread::kNoDeoptId,
                                    token_pos());
   } else {
@@ skipping 427 matching lines @@
       __ BitNot(locs()->out(0).reg(), locs()->in(0).reg());
       break;
     default:
       UNREACHABLE();
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_DBC