Remove MIPS support

runtime/vm/runtime_entry_mips.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_MIPS)
-
-#include "vm/runtime_entry.h"
-
-#include "vm/assembler.h"
-#include "vm/simulator.h"
-#include "vm/stub_code.h"
-
-namespace dart {
-
-#define __ assembler->
-
-
-uword RuntimeEntry::GetEntryPoint() const {
-  // Compute the effective address. When running under the simulator,
-  // this is a redirection address that forces the simulator to call
-  // into the runtime system.
-  uword entry = reinterpret_cast<uword>(function());
-#if defined(USING_SIMULATOR)
-  // Redirection to leaf runtime calls supports a maximum of 4 arguments passed
-  // in registers (maximum 2 double arguments for leaf float runtime calls).
-  ASSERT(argument_count() >= 0);
-  ASSERT(!is_leaf() || (!is_float() && (argument_count() <= 4)) ||
-         (argument_count() <= 2));
-  Simulator::CallKind call_kind =
-      is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall
-                              : Simulator::kLeafRuntimeCall)
-                : Simulator::kRuntimeCall;
-  entry =
-      Simulator::RedirectExternalReference(entry, call_kind, argument_count());
-#endif
-  return entry;
-}
-
-
-// Generate code to call into the stub which will call the runtime
-// function. Input for the stub is as follows:
-//   SP : points to the arguments and return value array.
-//   S5 : address of the runtime function to call.
-//   S4 : number of arguments to the call.
-void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
-  if (is_leaf()) {
-    ASSERT(argument_count == this->argument_count());
-    __ lw(T9, Address(THR, Thread::OffsetFromThread(this)));
-    __ jalr(T9);
-  } else {
-    // Argument count is not checked here, but in the runtime entry for a more
-    // informative error message.
-    __ lw(S5, Address(THR, Thread::OffsetFromThread(this)));
-    __ LoadImmediate(S4, argument_count);
-    __ BranchLinkToRuntime();
-  }
-}
-
-}  // namespace dart
-
-#endif  // defined TARGET_ARCH_MIPS