math_entrypoints.cc revision 7655f29fabc0a12765de828914a18314382e5a35 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "math_entrypoints.h"
18
19namespace art {
20
21extern "C" double art_l2d(int64_t l) {
22  return static_cast<double>(l);
23}
24
25extern "C" float art_l2f(int64_t l) {
26  return static_cast<float>(l);
27}
28
29/*
30 * Float/double conversion requires clamping to min and max of integer form.  If
31 * target doesn't support this normally, use these.
32 */
33extern "C" int64_t art_d2l(double d) {
34  static const double kMaxLong = static_cast<double>(static_cast<int64_t>(0x7fffffffffffffffULL));
35  static const double kMinLong = static_cast<double>(static_cast<int64_t>(0x8000000000000000ULL));
36  if (d >= kMaxLong) {
37    return static_cast<int64_t>(0x7fffffffffffffffULL);
38  } else if (d <= kMinLong) {
39    return static_cast<int64_t>(0x8000000000000000ULL);
40  } else if (d != d)  {  // NaN case
41    return 0;
42  } else {
43    return static_cast<int64_t>(d);
44  }
45}
46
47extern "C" int64_t art_f2l(float f) {
48  static const float kMaxLong = static_cast<float>(static_cast<int64_t>(0x7fffffffffffffffULL));
49  static const float kMinLong = static_cast<float>(static_cast<int64_t>(0x8000000000000000ULL));
50  if (f >= kMaxLong) {
51    return static_cast<int64_t>(0x7fffffffffffffffULL);
52  } else if (f <= kMinLong) {
53    return static_cast<int64_t>(0x8000000000000000ULL);
54  } else if (f != f) {  // NaN case
55    return 0;
56  } else {
57    return static_cast<int64_t>(f);
58  }
59}
60
61extern "C" int32_t art_d2i(double d) {
62  static const double kMaxInt = static_cast<double>(static_cast<int32_t>(0x7fffffffUL));
63  static const double kMinInt = static_cast<double>(static_cast<int32_t>(0x80000000UL));
64  if (d >= kMaxInt) {
65    return static_cast<int32_t>(0x7fffffffUL);
66  } else if (d <= kMinInt) {
67    return static_cast<int32_t>(0x80000000UL);
68  } else if (d != d)  {  // NaN case
69    return 0;
70  } else {
71    return static_cast<int32_t>(d);
72  }
73}
74
75extern "C" int32_t art_f2i(float f) {
76  static const float kMaxInt = static_cast<float>(static_cast<int32_t>(0x7fffffffUL));
77  static const float kMinInt = static_cast<float>(static_cast<int32_t>(0x80000000UL));
78  if (f >= kMaxInt) {
79    return static_cast<int32_t>(0x7fffffffUL);
80  } else if (f <= kMinInt) {
81    return static_cast<int32_t>(0x80000000UL);
82  } else if (f != f) {  // NaN case
83    return 0;
84  } else {
85    return static_cast<int32_t>(f);
86  }
87}
88
89}  // namespace art
90