openMSX
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Classes | |
struct | QuotientRemainder |
Divide one integer by another, rounding towards minus infinity. More... | |
Functions | |
constexpr auto | floodRight (std::unsigned_integral auto x) noexcept |
Returns the smallest number of the form 2^n-1 that is greater or equal to the given number. More... | |
template<std::signed_integral T> | |
int16_t | clipToInt16 (T x) |
Clip x to range [-32768,32767]. More... | |
uint8_t | clipIntToByte (int x) |
Clip x to range [0,255]. More... | |
constexpr unsigned | reverseNBits (unsigned x, unsigned bits) |
Reverse the lower N bits of a given value. More... | |
constexpr uint8_t | reverseByte (uint8_t a) |
Reverse the bits in a byte. More... | |
unsigned | findFirstSet (uint32_t x) |
Find the least significant bit that is set. More... | |
constexpr float | cubicHermite (std::span< const float, 4 > y, float x) |
constexpr QuotientRemainder | div_mod_floor (int dividend, int divisor) |
constexpr int | div_floor (int dividend, int divisor) |
constexpr int | mod_floor (int dividend, int divisor) |
Variables | |
constexpr double | e = std::numbers::e_v <double> |
constexpr double | ln2 = std::numbers::ln2_v <double> |
constexpr double | ln10 = std::numbers::ln10_v<double> |
constexpr double | pi = std::numbers::pi_v <double> |
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inline |
Clip x to range [0,255].
Optimized for the case when no clipping is needed.
Definition at line 61 of file Math.hh.
Referenced by openmsx::VDP::getMSX1Palette(), and TEST_CASE().
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inline |
Clip x to range [-32768,32767].
Optimized for the case when no clipping is needed.
Definition at line 47 of file Math.hh.
Referenced by openmsx::WavImage::getSampleAt(), openmsx::DCFilter::operator()(), TEST_CASE(), and openmsx::Y8950::writeReg().
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constexpr |
Definition at line 167 of file Math.hh.
Referenced by openmsx::WavImage::getSampleAt().
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constexpr |
Definition at line 197 of file Math.hh.
References div_mod_floor(), and Math::QuotientRemainder::quotient.
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constexpr |
Definition at line 188 of file Math.hh.
Referenced by div_floor(), and mod_floor().
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inline |
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constexprnoexcept |
Returns the smallest number of the form 2^n-1 that is greater or equal to the given number.
The resulting number has the same number of leading zeros as the input, but starting from the first 1-bit in the input all bits more to the right are also 1.
Definition at line 32 of file Math.hh.
Referenced by openmsx::VRAMWindow::getReadAreaPlanar(), openmsx::VRAMWindow::isContinuous(), and TEST_CASE().
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constexpr |
Definition at line 200 of file Math.hh.
References div_mod_floor(), and Math::QuotientRemainder::remainder.
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constexpr |
Reverse the bits in a byte.
This is equivalent to (but faster than) reverseNBits(x, 8);
Definition at line 125 of file Math.hh.
Referenced by openmsx::ImagePrinter::printGraphicByte(), and openmsx::LaserdiscPlayer::serialize().
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constexpr |
Reverse the lower N bits of a given value.
The upper 32-N bits from the input are ignored and will be returned as 0. For example reverseNBits('xxxabcde', 5) returns '000edcba' (binary notation).
Definition at line 75 of file Math.hh.
Referenced by openmsx::LaserdiscPlayer::serialize().
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inlineconstexpr |
Definition at line 21 of file Math.hh.
Referenced by openmsx::Clock< FREQ_NUM, FREQ_DENOM >::advance(), openmsx::DynamicClock::advance(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::advance_fast(), openmsx::XMLDocument::allocateString(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::before(), openmsx::DynamicClock::before(), openmsx::XmlInputArchive::beginTag(), openmsx::BreakPointBase::checkAndExecute(), openmsx::CliServer::CliServer(), openmsx::IPSPatch::copyBlock(), openmsx::OSDImageBasedWidget::createImage(), openmsx::SDLVisibleSurfaceBase::createSurface(), openmsx::EventDistributor::deliverEvents(), dynarray< T >::dynarray(), openmsx::Sha1Sum::empty(), openmsx::EmuDurationCompactStorage< T >::EmuDurationCompactStorage(), openmsx::AfterCmd::execute(), openmsx::MachineExtensionInfo::execute(), openmsx::ConfigInfo::execute(), openmsx::DiskCommand::execute(), openmsx::ListExtCmd::execute(), openmsx::MachineCommand::execute(), openmsx::TestMachineCommand::execute(), openmsx::RestoreMachineCommand::execute(), openmsx::HDCommand::execute(), openmsx::CDXCommand::execute(), openmsx::LSXCommand::execute(), openmsx::RemoveExtCmd::execute(), openmsx::ExtCmd::execute(), ranges::find(), openmsx::FirmwareSwitch::FirmwareSwitch(), openmsx::EventDelay::flush(), openmsx::ImagePrinter::flushEmulatedPrinter(), openmsx::EnumSettingBase::getPossibleValues(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::getTicksTill(), openmsx::DynamicClock::getTicksTill(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::getTicksTill_fast(), openmsx::DynamicClock::getTicksTillAsIntFloat(), openmsx::DynamicClock::getTicksTillDouble(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::getTicksTillUp(), openmsx::DynamicClock::getTicksTillUp(), openmsx::MSXMotherBoard::insertExtension(), openmsx::isRepeatStopper(), openmsx::PNG::load(), openmsx::XMLDocument::load(), openmsx::MSXMotherBoard::loadExtension(), openmsx::MSXMotherBoard::loadMachine(), openmsx::SettingsConfig::loadSetting(), openmsx::matches(), openmsx::MsxChar2Unicode::MsxChar2Unicode(), openmsx::MSXtar::MSXtar(), openmsx::VariantSerializer< V >::Saver::operator()(), openmsx::VariantSerializer< V >::Loader::operator()(), openmsx::EqualEvent::operator()(), openmsx::CommandLineParser::parse(), openmsx::CliExtension::parseOption(), openmsx::PrinterPortLogger::plugHelper(), openmsx::WavAudioInput::plugHelper(), circular_buffer< T >::push_back(), cb_queue< T >::push_back(), openmsx::SectorAccessibleDisk::readSectors(), openmsx::MSXCPUInterface::removeCondition(), openmsx::MSXMotherBoard::removeExtension(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::reset(), openmsx::DynamicClock::reset(), openmsx::Rom::Rom(), openmsx::RomDatabase::RomDatabase(), openmsx::PostProcessor::rotateFrames(), openmsx::Reactor::run(), openmsx::Connector::serialize(), openmsx::DiskChanger::serialize(), openmsx::Paper::setDotSize(), openmsx::EnumSetting< T >::setEnum(), openmsx::SN76489::SN76489(), openmsx::GlobalCommandController::source(), StringOp::stringToBase(), utf8::unchecked::substr(), openmsx::EventDelay::sync(), openmsx::RemoveExtCmd::tabCompletion(), openmsx::MachineExtensionInfo::tabCompletion(), test(), TEST_CASE(), openmsx::DBParser::text(), ProfileCounters< ENABLED, ENUM >::tick(), openmsx::toTclList(), openmsx::Touchpad::Touchpad(), openmsx::SectorAccessibleDisk::writeSector(), xrange(), openmsx::YM2151::YM2151(), openmsx::YM2413Burczynski::YM2413::YM2413(), openmsx::YM2413Okazaki::YM2413::YM2413(), openmsx::YMF262::YMF262(), openmsx::FirmwareSwitch::~FirmwareSwitch(), openmsx::HardwareConfig::~HardwareConfig(), and openmsx::SettingsConfig::~SettingsConfig().
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inlineconstexpr |
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inlineconstexpr |
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inlineconstexpr |
Definition at line 24 of file Math.hh.
Referenced by gl::degrees(), openmsx::DCFilter::setFreq(), and TEST_CASE().