1/*
2 * Copyright (C) 2015 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "CachedRecovery.h"
28
29#if ENABLE(JIT)
30
31namespace JSC {
32
33// We prefer loading doubles and undetermined JSValues into FPRs
34// because it would otherwise use up GPRs. Two in JSVALUE32_64.
35bool CachedRecovery::loadsIntoFPR() const
36{
37 switch (recovery().technique()) {
38 case DoubleDisplacedInJSStack:
39 case DisplacedInJSStack:
40#if USE(JSVALUE64)
41 case CellDisplacedInJSStack:
42#endif
43 return true;
44
45 default:
46 return false;
47 }
48}
49
50// Integers, booleans and cells can be loaded into GPRs
51bool CachedRecovery::loadsIntoGPR() const
52{
53 switch (recovery().technique()) {
54 case Int32DisplacedInJSStack:
55#if USE(JSVALUE64)
56 case Int52DisplacedInJSStack:
57 case StrictInt52DisplacedInJSStack:
58 case DisplacedInJSStack:
59#endif
60 case BooleanDisplacedInJSStack:
61 case CellDisplacedInJSStack:
62 return true;
63
64 default:
65 return false;
66 }
67}
68
69} // namespace JSC
70
71#endif // ENABLE(JIT)
72