projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 6fe7ccc8 A |
1 | /* |
| 2 | * Copyright (C) 2012 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 | #ifndef DFGDoubleFormatState_h | |
| 27 | #define DFGDoubleFormatState_h | |
| 28 | ||
| 29 | namespace JSC { namespace DFG { | |
| 30 | ||
| 31 | enum DoubleFormatState { | |
| 32 | EmptyDoubleFormatState, // bottom | |
| 33 | UsingDoubleFormat, | |
| 34 | NotUsingDoubleFormat, | |
| 35 | CantUseDoubleFormat // top | |
| 36 | }; | |
| 37 | ||
| 38 | inline DoubleFormatState mergeDoubleFormatStates(DoubleFormatState a, DoubleFormatState b) | |
| 39 | { | |
| 40 | switch (a) { | |
| 41 | case EmptyDoubleFormatState: | |
| 42 | return b; | |
| 43 | case UsingDoubleFormat: | |
| 44 | switch (b) { | |
| 45 | case EmptyDoubleFormatState: | |
| 46 | case UsingDoubleFormat: | |
| 47 | return UsingDoubleFormat; | |
| 48 | case NotUsingDoubleFormat: | |
| 49 | case CantUseDoubleFormat: | |
| 50 | return CantUseDoubleFormat; | |
| 51 | } | |
| 52 | case NotUsingDoubleFormat: | |
| 53 | switch (b) { | |
| 54 | case EmptyDoubleFormatState: | |
| 55 | case NotUsingDoubleFormat: | |
| 56 | return NotUsingDoubleFormat; | |
| 57 | case UsingDoubleFormat: | |
| 58 | case CantUseDoubleFormat: | |
| 59 | return CantUseDoubleFormat; | |
| 60 | } | |
| 61 | case CantUseDoubleFormat: | |
| 62 | return CantUseDoubleFormat; | |
| 63 | } | |
| 64 | ASSERT_NOT_REACHED(); | |
| 65 | return CantUseDoubleFormat; | |
| 66 | } | |
| 67 | ||
| 68 | inline bool mergeDoubleFormatState(DoubleFormatState& dest, DoubleFormatState src) | |
| 69 | { | |
| 70 | DoubleFormatState newState = mergeDoubleFormatStates(dest, src); | |
| 71 | if (newState == dest) | |
| 72 | return false; | |
| 73 | dest = newState; | |
| 74 | return true; | |
| 75 | } | |
| 76 | ||
| 77 | inline const char* doubleFormatStateToString(DoubleFormatState state) | |
| 78 | { | |
| 79 | switch (state) { | |
| 80 | case EmptyDoubleFormatState: | |
| 81 | return "Empty"; | |
| 82 | case UsingDoubleFormat: | |
| 83 | return "DoubleFormat"; | |
| 84 | case NotUsingDoubleFormat: | |
| 85 | return "ValueFormat"; | |
| 86 | case CantUseDoubleFormat: | |
| 87 | return "ForceValue"; | |
| 88 | } | |
| 89 | ASSERT_NOT_REACHED(); | |
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | } } // namespace JSC::DFG | |
| 94 | ||
| 95 | #endif // DFGDoubleFormatState_h | |
| 96 |