Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/utilities/ticks.hpp@aefa2e84b424 (annotated)
src/share/vm/utilities/ticks.hpp
Thu, 19 Mar 2015 19:53:34 +0100
- author
- zmajo
- date
- Thu, 19 Mar 2015 19:53:34 +0100
- changeset 7638
- aefa2e84b424
- parent 0
- f90c822e73f8
- child 9858
- b985cbb00e68
- permissions
- -rw-r--r--
8074869: C2 code generator can replace -0.0f with +0.0f on Linux
Summary: Instead of 'fpclass', use cast float->int and double->long to check if value is +0.0f and +0.0d, respectively.
Reviewed-by: kvn, simonis, dlong
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_UTILITIES_TICKS_HPP |
| aoqi@0 | 26 | #define SHARE_VM_UTILITIES_TICKS_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "memory/allocation.hpp" |
| aoqi@0 | 29 | #include "utilities/globalDefinitions.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | class Ticks; |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | class Tickspan VALUE_OBJ_CLASS_SPEC { |
| aoqi@0 | 34 | friend class Ticks; |
| aoqi@0 | 35 | friend Tickspan operator-(const Ticks& end, const Ticks& start); |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | private: |
| aoqi@0 | 38 | jlong _span_ticks; |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | Tickspan(const Ticks& end, const Ticks& start); |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | public: |
| aoqi@0 | 43 | Tickspan() : _span_ticks(0) {} |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | Tickspan& operator+=(const Tickspan& rhs) { |
| aoqi@0 | 46 | _span_ticks += rhs._span_ticks; |
| aoqi@0 | 47 | return *this; |
| aoqi@0 | 48 | } |
| aoqi@0 | 49 | |
| aoqi@0 | 50 | jlong value() const { |
| aoqi@0 | 51 | return _span_ticks; |
| aoqi@0 | 52 | } |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | }; |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | class Ticks VALUE_OBJ_CLASS_SPEC { |
| aoqi@0 | 57 | private: |
| aoqi@0 | 58 | jlong _stamp_ticks; |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | public: |
| aoqi@0 | 61 | Ticks() : _stamp_ticks(0) { |
| aoqi@0 | 62 | assert((_stamp_ticks = invalid_time_stamp) == invalid_time_stamp, |
| aoqi@0 | 63 | "initial unstamped time value assignment"); |
| aoqi@0 | 64 | } |
| aoqi@0 | 65 | |
| aoqi@0 | 66 | Ticks& operator+=(const Tickspan& span) { |
| aoqi@0 | 67 | _stamp_ticks += span.value(); |
| aoqi@0 | 68 | return *this; |
| aoqi@0 | 69 | } |
| aoqi@0 | 70 | |
| aoqi@0 | 71 | Ticks& operator-=(const Tickspan& span) { |
| aoqi@0 | 72 | _stamp_ticks -= span.value(); |
| aoqi@0 | 73 | return *this; |
| aoqi@0 | 74 | } |
| aoqi@0 | 75 | |
| aoqi@0 | 76 | void stamp(); |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | jlong value() const { |
| aoqi@0 | 79 | return _stamp_ticks; |
| aoqi@0 | 80 | } |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | static const Ticks now(); |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | #ifdef ASSERT |
| aoqi@0 | 85 | static const jlong invalid_time_stamp; |
| aoqi@0 | 86 | #endif |
| aoqi@0 | 87 | |
| aoqi@0 | 88 | #ifndef PRODUCT |
| aoqi@0 | 89 | // only for internal use by GC VM tests |
| aoqi@0 | 90 | friend class TimePartitionPhasesIteratorTest; |
| aoqi@0 | 91 | friend class GCTimerTest; |
| aoqi@0 | 92 | |
| aoqi@0 | 93 | private: |
| aoqi@0 | 94 | // implicit type conversion |
| aoqi@0 | 95 | Ticks(int ticks) : _stamp_ticks(ticks) {} |
| aoqi@0 | 96 | |
| aoqi@0 | 97 | #endif // !PRODUCT |
| aoqi@0 | 98 | |
| aoqi@0 | 99 | }; |
| aoqi@0 | 100 | |
| aoqi@0 | 101 | class TicksToTimeHelper : public AllStatic { |
| aoqi@0 | 102 | public: |
| aoqi@0 | 103 | enum Unit { |
| aoqi@0 | 104 | SECONDS = 1, |
| aoqi@0 | 105 | MILLISECONDS = 1000 |
| aoqi@0 | 106 | }; |
| aoqi@0 | 107 | static double seconds(const Tickspan& span); |
| aoqi@0 | 108 | static jlong milliseconds(const Tickspan& span); |
| aoqi@0 | 109 | }; |
| aoqi@0 | 110 | |
| aoqi@0 | 111 | #endif // SHARE_VM_UTILITIES_TICKS_HPP |
