CJentzsch
10 years ago
50 changed files with 1387 additions and 256 deletions
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<?xml version="1.0" encoding="UTF-8"?> |
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<ui version="4.0"> |
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<class>GasPricing</class> |
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<widget class="QDialog" name="GasPricing"> |
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<property name="geometry"> |
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<rect> |
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<x>0</x> |
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<y>0</y> |
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<width>416</width> |
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<height>286</height> |
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</rect> |
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</property> |
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<property name="windowTitle"> |
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<string>Gas Pricing</string> |
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</property> |
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<layout class="QGridLayout" name="gridLayout"> |
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<item row="3" column="0" colspan="2"> |
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<spacer name="verticalSpacer"> |
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<property name="orientation"> |
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<enum>Qt::Vertical</enum> |
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</property> |
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<property name="sizeHint" stdset="0"> |
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<size> |
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<width>398</width> |
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<height>45</height> |
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</size> |
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</property> |
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</spacer> |
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</item> |
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<item row="4" column="0" colspan="2"> |
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<widget class="QLabel" name="label5_3"> |
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<property name="text"> |
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<string>&Bid: The minimum grice of gas that is accepting into a block which we mine.</string> |
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</property> |
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<property name="alignment"> |
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<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set> |
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</property> |
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<property name="wordWrap"> |
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<bool>true</bool> |
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</property> |
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<property name="buddy"> |
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<cstring>bidValue</cstring> |
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</property> |
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</widget> |
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</item> |
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<item row="1" column="0"> |
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<widget class="QSpinBox" name="askValue"> |
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<property name="suffix"> |
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<string/> |
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</property> |
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<property name="maximum"> |
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<number>430000000</number> |
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</property> |
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<property name="value"> |
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<number>0</number> |
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</property> |
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</widget> |
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</item> |
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<item row="10" column="0" colspan="2"> |
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<layout class="QHBoxLayout" name="horizontalLayout"> |
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<item> |
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<spacer name="horizontalSpacer"> |
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<property name="orientation"> |
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<enum>Qt::Horizontal</enum> |
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</property> |
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<property name="sizeHint" stdset="0"> |
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<size> |
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<width>40</width> |
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<height>20</height> |
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</size> |
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</property> |
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</spacer> |
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</item> |
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<item> |
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<widget class="QPushButton" name="close"> |
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<property name="text"> |
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<string>Close</string> |
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</property> |
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<property name="default"> |
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<bool>true</bool> |
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</property> |
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</widget> |
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</item> |
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</layout> |
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</item> |
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<item row="0" column="0" colspan="2"> |
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<widget class="QLabel" name="label5_2"> |
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<property name="text"> |
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<string>&Ask: The minimum grice of gas that is accepting into a block which we mine.</string> |
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</property> |
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<property name="alignment"> |
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<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set> |
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</property> |
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<property name="wordWrap"> |
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<bool>true</bool> |
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</property> |
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<property name="buddy"> |
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<cstring>askValue</cstring> |
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</property> |
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</widget> |
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</item> |
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<item row="1" column="1"> |
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<widget class="QComboBox" name="askUnits"/> |
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</item> |
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<item row="5" column="0"> |
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<widget class="QSpinBox" name="bidValue"> |
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<property name="suffix"> |
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<string/> |
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</property> |
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<property name="maximum"> |
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<number>430000000</number> |
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</property> |
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<property name="value"> |
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<number>0</number> |
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</property> |
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</widget> |
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</item> |
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<item row="5" column="1"> |
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<widget class="QComboBox" name="bidUnits"/> |
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</item> |
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<item row="7" column="0" colspan="2"> |
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<spacer name="verticalSpacer_2"> |
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<property name="orientation"> |
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<enum>Qt::Vertical</enum> |
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</property> |
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<property name="sizeHint" stdset="0"> |
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<size> |
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<width>20</width> |
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<height>40</height> |
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</size> |
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</property> |
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</spacer> |
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</item> |
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<item row="9" column="0" colspan="2"> |
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<spacer name="verticalSpacer_3"> |
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<property name="orientation"> |
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<enum>Qt::Vertical</enum> |
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</property> |
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<property name="sizeHint" stdset="0"> |
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<size> |
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<width>20</width> |
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<height>40</height> |
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</size> |
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</property> |
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</spacer> |
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</item> |
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<item row="8" column="0" colspan="2"> |
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<spacer name="verticalSpacer_4"> |
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<property name="orientation"> |
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<enum>Qt::Vertical</enum> |
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</property> |
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<property name="sizeHint" stdset="0"> |
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<size> |
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<width>20</width> |
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<height>40</height> |
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</size> |
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</property> |
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</spacer> |
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</item> |
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</layout> |
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</widget> |
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<resources/> |
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<connections> |
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<connection> |
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<sender>close</sender> |
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<signal>clicked()</signal> |
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<receiver>GasPricing</receiver> |
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<slot>accept()</slot> |
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<hints> |
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<hint type="sourcelabel"> |
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<x>387</x> |
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<y>264</y> |
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</hint> |
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<hint type="destinationlabel"> |
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<x>240</x> |
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<y>262</y> |
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</hint> |
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</hints> |
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</connection> |
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</connections> |
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</ui> |
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@ -1,4 +1,6 @@ |
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[ |
[ |
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{ "name": "eth_getWork", "params": [], "order": [], "returns": []}, |
{ "name": "eth_getWork", "params": [], "order": [], "returns": []}, |
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{ "name": "eth_submitWork", "params": ["", "", ""], "order": [], "returns": true} |
{ "name": "eth_submitWork", "params": ["", "", ""], "order": [], "returns": true} |
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{ "name": "eth_awaitNewWork", "params": [], "order": [], "returns": []}, |
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{ "name": "eth_progress", "params": [], "order": [], "returns": true} |
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] |
] |
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|
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@ -0,0 +1,225 @@ |
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/*
|
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This file is part of cpp-ethereum. |
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|
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cpp-ethereum is free software: you can redistribute it and/or modify |
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|
it under the terms of the GNU General Public License as published by |
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|
the Free Software Foundation, either version 3 of the License, or |
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|
(at your option) any later version. |
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|
|
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|
cpp-ethereum is distributed in the hope that it will be useful, |
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|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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|
GNU General Public License for more details. |
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|
|
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You should have received a copy of the GNU General Public License |
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|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
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*/ |
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/** @file ConstantOptimiser.cpp
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* @author Christian <c@ethdev.com> |
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* @date 2015 |
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*/ |
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#include "libevmasm/ConstantOptimiser.h" |
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#include <libevmasm/Assembly.h> |
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#include <libevmasm/GasMeter.h> |
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#include <libevmcore/Params.h> |
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using namespace std; |
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using namespace dev; |
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using namespace dev::eth; |
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|
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unsigned ConstantOptimisationMethod::optimiseConstants( |
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bool _isCreation, |
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size_t _runs, |
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Assembly& _assembly, |
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AssemblyItems& _items |
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) |
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{ |
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unsigned optimisations = 0; |
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map<AssemblyItem, size_t> pushes; |
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for (AssemblyItem const& item: _items) |
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if (item.type() == Push) |
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pushes[item]++; |
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for (auto it: pushes) |
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{ |
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AssemblyItem const& item = it.first; |
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if (item.data() < 0x100) |
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continue; |
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Params params; |
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params.multiplicity = it.second; |
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params.isCreation = _isCreation; |
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params.runs = _runs; |
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LiteralMethod lit(params, item.data()); |
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bigint literalGas = lit.gasNeeded(); |
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CodeCopyMethod copy(params, item.data()); |
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bigint copyGas = copy.gasNeeded(); |
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ComputeMethod compute(params, item.data()); |
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bigint computeGas = compute.gasNeeded(); |
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if (copyGas < literalGas && copyGas < computeGas) |
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{ |
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copy.execute(_assembly, _items); |
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optimisations++; |
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} |
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else if (computeGas < literalGas && computeGas < copyGas) |
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{ |
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compute.execute(_assembly, _items); |
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optimisations++; |
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} |
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} |
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return optimisations; |
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} |
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|
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bigint ConstantOptimisationMethod::simpleRunGas(AssemblyItems const& _items) |
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{ |
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bigint gas = 0; |
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for (AssemblyItem const& item: _items) |
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if (item.type() == Push) |
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gas += GasMeter::runGas(Instruction::PUSH1); |
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else if (item.type() == Operation) |
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gas += GasMeter::runGas(item.instruction()); |
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return gas; |
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} |
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bigint ConstantOptimisationMethod::dataGas(bytes const& _data) const |
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{ |
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if (m_params.isCreation) |
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{ |
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bigint gas; |
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for (auto b: _data) |
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gas += b ? c_txDataNonZeroGas : c_txDataZeroGas; |
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return gas; |
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} |
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else |
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return c_createDataGas * dataSize(); |
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} |
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size_t ConstantOptimisationMethod::bytesRequired(AssemblyItems const& _items) |
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{ |
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size_t size = 0; |
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for (AssemblyItem const& item: _items) |
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size += item.bytesRequired(3); // assume 3 byte addresses
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return size; |
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} |
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void ConstantOptimisationMethod::replaceConstants( |
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AssemblyItems& _items, |
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AssemblyItems const& _replacement |
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) const |
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{ |
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assertThrow(_items.size() > 0, OptimizerException, ""); |
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for (size_t i = 0; i < _items.size(); ++i) |
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{ |
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if (_items.at(i) != AssemblyItem(m_value)) |
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continue; |
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_items[i] = _replacement[0]; |
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_items.insert(_items.begin() + i + 1, _replacement.begin() + 1, _replacement.end()); |
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i += _replacement.size() - 1; |
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} |
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} |
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|
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bigint LiteralMethod::gasNeeded() |
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{ |
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return combineGas( |
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simpleRunGas({Instruction::PUSH1}), |
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// PUSHX plus data
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(m_params.isCreation ? c_txDataNonZeroGas : c_createDataGas) + dataGas(), |
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0 |
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); |
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} |
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CodeCopyMethod::CodeCopyMethod(Params const& _params, u256 const& _value): |
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ConstantOptimisationMethod(_params, _value) |
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{ |
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m_copyRoutine = AssemblyItems{ |
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u256(0), |
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Instruction::DUP1, |
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Instruction::MLOAD, // back up memory
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u256(32), |
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AssemblyItem(PushData, u256(1) << 16), // has to be replaced
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Instruction::DUP4, |
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Instruction::CODECOPY, |
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Instruction::DUP2, |
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Instruction::MLOAD, |
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Instruction::SWAP2, |
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Instruction::MSTORE |
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}; |
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} |
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bigint CodeCopyMethod::gasNeeded() |
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{ |
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return combineGas( |
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// Run gas: we ignore memory increase costs
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simpleRunGas(m_copyRoutine) + c_copyGas, |
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// Data gas for copy routines: Some bytes are zero, but we ignore them.
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bytesRequired(m_copyRoutine) * (m_params.isCreation ? c_txDataNonZeroGas : c_createDataGas), |
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// Data gas for data itself
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dataGas(toBigEndian(m_value)) |
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); |
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} |
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|
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void CodeCopyMethod::execute(Assembly& _assembly, AssemblyItems& _items) |
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{ |
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bytes data = toBigEndian(m_value); |
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m_copyRoutine[4] = _assembly.newData(data); |
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replaceConstants(_items, m_copyRoutine); |
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} |
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AssemblyItems ComputeMethod::findRepresentation(u256 const& _value) |
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{ |
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if (_value < 0x10000) |
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// Very small value, not worth computing
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return AssemblyItems{_value}; |
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else if (dev::bytesRequired(~_value) < dev::bytesRequired(_value)) |
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// Negated is shorter to represent
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return findRepresentation(~_value) + AssemblyItems{Instruction::NOT}; |
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else |
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{ |
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// Decompose value into a * 2**k + b where abs(b) << 2**k
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// Is not always better, try literal and decomposition method.
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AssemblyItems routine{u256(_value)}; |
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bigint bestGas = gasNeeded(routine); |
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for (unsigned bits = 255; bits > 8; --bits) |
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{ |
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unsigned gapDetector = unsigned(_value >> (bits - 8)) & 0x1ff; |
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if (gapDetector != 0xff && gapDetector != 0x100) |
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continue; |
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|
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u256 powerOfTwo = u256(1) << bits; |
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u256 upperPart = _value >> bits; |
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bigint lowerPart = _value & (powerOfTwo - 1); |
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if (abs(powerOfTwo - lowerPart) < lowerPart) |
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lowerPart = lowerPart - powerOfTwo; // make it negative
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if (abs(lowerPart) >= (powerOfTwo >> 8)) |
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continue; |
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|
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AssemblyItems newRoutine; |
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if (lowerPart != 0) |
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newRoutine += findRepresentation(u256(abs(lowerPart))); |
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newRoutine += AssemblyItems{u256(bits), u256(2), Instruction::EXP}; |
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if (upperPart != 1 && upperPart != 0) |
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newRoutine += findRepresentation(upperPart) + AssemblyItems{Instruction::MUL}; |
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if (lowerPart > 0) |
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newRoutine += AssemblyItems{Instruction::ADD}; |
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else if (lowerPart < 0) |
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newRoutine.push_back(Instruction::SUB); |
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|
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bigint newGas = gasNeeded(newRoutine); |
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if (newGas < bestGas) |
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{ |
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bestGas = move(newGas); |
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routine = move(newRoutine); |
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} |
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} |
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return routine; |
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} |
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} |
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|
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bigint ComputeMethod::gasNeeded(AssemblyItems const& _routine) |
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{ |
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size_t numExps = count(_routine.begin(), _routine.end(), Instruction::EXP); |
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return combineGas( |
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simpleRunGas(_routine) + numExps * (c_expGas + c_expByteGas), |
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// Data gas for routine: Some bytes are zero, but we ignore them.
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bytesRequired(_routine) * (m_params.isCreation ? c_txDataNonZeroGas : c_createDataGas), |
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0 |
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); |
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} |
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@ -0,0 +1,147 @@ |
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/*
|
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This file is part of cpp-ethereum. |
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|
|
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|
cpp-ethereum is free software: you can redistribute it and/or modify |
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|
it under the terms of the GNU General Public License as published by |
||||
|
the Free Software Foundation, either version 3 of the License, or |
||||
|
(at your option) any later version. |
||||
|
|
||||
|
cpp-ethereum is distributed in the hope that it will be useful, |
||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
|
GNU General Public License for more details. |
||||
|
|
||||
|
You should have received a copy of the GNU General Public License |
||||
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
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|
*/ |
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/** @file ConstantOptimiser.cpp
|
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* @author Christian <c@ethdev.com> |
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* @date 2015 |
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*/ |
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|
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#pragma once |
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#include <vector> |
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#include <libdevcore/CommonData.h> |
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#include <libdevcore/CommonIO.h> |
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|
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namespace dev |
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{ |
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namespace eth |
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{ |
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|
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class AssemblyItem; |
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using AssemblyItems = std::vector<AssemblyItem>; |
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class Assembly; |
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|
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/**
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* Abstract base class for one way to change how constants are represented in the code. |
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*/ |
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class ConstantOptimisationMethod |
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{ |
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public: |
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/// Tries to optimised how constants are represented in the source code and modifies
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/// @a _assembly and its @a _items.
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/// @returns zero if no optimisations could be performed.
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static unsigned optimiseConstants( |
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|
bool _isCreation, |
||||
|
size_t _runs, |
||||
|
Assembly& _assembly, |
||||
|
AssemblyItems& _items |
||||
|
); |
||||
|
|
||||
|
struct Params |
||||
|
{ |
||||
|
bool isCreation; ///< Whether this is called during contract creation or runtime.
|
||||
|
size_t runs; ///< Estimated number of calls per opcode oven the lifetime of the contract.
|
||||
|
size_t multiplicity; ///< Number of times the constant appears in the code.
|
||||
|
}; |
||||
|
|
||||
|
explicit ConstantOptimisationMethod(Params const& _params, u256 const& _value): |
||||
|
m_params(_params), m_value(_value) {} |
||||
|
virtual bigint gasNeeded() = 0; |
||||
|
virtual void execute(Assembly& _assembly, AssemblyItems& _items) = 0; |
||||
|
|
||||
|
protected: |
||||
|
size_t dataSize() const { return std::max<size_t>(1, dev::bytesRequired(m_value)); } |
||||
|
|
||||
|
/// @returns the run gas for the given items ignoring special gas costs
|
||||
|
static bigint simpleRunGas(AssemblyItems const& _items); |
||||
|
/// @returns the gas needed to store the given data literally
|
||||
|
bigint dataGas(bytes const& _data) const; |
||||
|
/// @returns the gas needed to store the value literally
|
||||
|
bigint dataGas() const { return dataGas(toCompactBigEndian(m_value, 1)); } |
||||
|
static size_t bytesRequired(AssemblyItems const& _items); |
||||
|
/// @returns the combined estimated gas usage taking @a m_params into account.
|
||||
|
bigint combineGas( |
||||
|
bigint const& _runGas, |
||||
|
bigint const& _repeatedDataGas, |
||||
|
bigint const& _uniqueDataGas |
||||
|
) |
||||
|
{ |
||||
|
// _runGas is not multiplied by _multiplicity because the runs are "per opcode"
|
||||
|
return m_params.runs * _runGas + m_params.multiplicity * _repeatedDataGas + _uniqueDataGas; |
||||
|
} |
||||
|
|
||||
|
/// Replaces the constant by the code given in @a _replacement.
|
||||
|
void replaceConstants(AssemblyItems& _items, AssemblyItems const& _replacement) const; |
||||
|
|
||||
|
Params m_params; |
||||
|
u256 const& m_value; |
||||
|
}; |
||||
|
|
||||
|
/**
|
||||
|
* Optimisation method that pushes the constant to the stack literally. This is the default method, |
||||
|
* i.e. executing it does not alter the Assembly. |
||||
|
*/ |
||||
|
class LiteralMethod: public ConstantOptimisationMethod |
||||
|
{ |
||||
|
public: |
||||
|
explicit LiteralMethod(Params const& _params, u256 const& _value): |
||||
|
ConstantOptimisationMethod(_params, _value) {} |
||||
|
virtual bigint gasNeeded() override; |
||||
|
virtual void execute(Assembly&, AssemblyItems&) override {} |
||||
|
}; |
||||
|
|
||||
|
/**
|
||||
|
* Method that stores the data in the .data section of the code and copies it to the stack. |
||||
|
*/ |
||||
|
class CodeCopyMethod: public ConstantOptimisationMethod |
||||
|
{ |
||||
|
public: |
||||
|
explicit CodeCopyMethod(Params const& _params, u256 const& _value); |
||||
|
virtual bigint gasNeeded() override; |
||||
|
virtual void execute(Assembly& _assembly, AssemblyItems& _items) override; |
||||
|
|
||||
|
protected: |
||||
|
AssemblyItems m_copyRoutine; |
||||
|
}; |
||||
|
|
||||
|
/**
|
||||
|
* Method that tries to compute the constant. |
||||
|
*/ |
||||
|
class ComputeMethod: public ConstantOptimisationMethod |
||||
|
{ |
||||
|
public: |
||||
|
explicit ComputeMethod(Params const& _params, u256 const& _value): |
||||
|
ConstantOptimisationMethod(_params, _value) |
||||
|
{ |
||||
|
m_routine = findRepresentation(m_value); |
||||
|
} |
||||
|
|
||||
|
virtual bigint gasNeeded() override { return gasNeeded(m_routine); } |
||||
|
virtual void execute(Assembly&, AssemblyItems& _items) override |
||||
|
{ |
||||
|
replaceConstants(_items, m_routine); |
||||
|
} |
||||
|
|
||||
|
protected: |
||||
|
/// Tries to recursively find a way to compute @a _value.
|
||||
|
AssemblyItems findRepresentation(u256 const& _value); |
||||
|
bigint gasNeeded(AssemblyItems const& _routine); |
||||
|
|
||||
|
AssemblyItems m_routine; |
||||
|
}; |
||||
|
|
||||
|
} |
||||
|
} |
||||
Loading…
Reference in new issue