[asmjs] Move switch-logic.h to asmjs/ directory.

src/wasm/switch-logic.cc

-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "src/wasm/switch-logic.h"
-
-namespace v8 {
-namespace internal {
-namespace wasm {
-
-namespace {
-CaseNode* CreateBst(ZoneVector<CaseNode*>* nodes, size_t begin, size_t end) {
-  if (end < begin) {
-    return nullptr;
-  } else if (end == begin) {
-    return nodes->at(begin);
-  } else {
-    size_t root_index = (begin + end) / 2;
-    CaseNode* root = nodes->at(root_index);
-    if (root_index != 0) {
-      root->left = CreateBst(nodes, begin, root_index - 1);
-    }
-    root->right = CreateBst(nodes, root_index + 1, end);
-    return root;
-  }
-}
-}  // namespace
-
-CaseNode* OrderCases(ZoneVector<int>* cases, Zone* zone) {
-  const int max_distance = 2;
-  const int min_size = 4;
-  if (cases->empty()) {
-    return nullptr;
-  }
-  std::sort(cases->begin(), cases->end());
-  ZoneVector<size_t> table_breaks(zone);
-  for (size_t i = 1; i < cases->size(); ++i) {
-    if (cases->at(i) - cases->at(i - 1) > max_distance) {
-      table_breaks.push_back(i);
-    }
-  }
-  table_breaks.push_back(cases->size());
-  ZoneVector<CaseNode*> nodes(zone);
-  size_t curr_pos = 0;
-  for (size_t i = 0; i < table_breaks.size(); ++i) {
-    size_t break_pos = table_breaks[i];
-    if (break_pos - curr_pos >= min_size) {
-      int begin = cases->at(curr_pos);
-      int end = cases->at(break_pos - 1);
-      nodes.push_back(new (zone) CaseNode(begin, end));
-      curr_pos = break_pos;
-    } else {
-      for (; curr_pos < break_pos; curr_pos++) {
-        nodes.push_back(new (zone)
-                            CaseNode(cases->at(curr_pos), cases->at(curr_pos)));
-      }
-    }
-  }
-  return CreateBst(&nodes, 0, nodes.size() - 1);
-}
-}  // namespace wasm
-}  // namespace internal
-}  // namespace v8