Xargon/Duckstation
1
0
Fork 0
mirror of https://github.com/RetroDECK/Duckstation.git synced 2025-01-18 06:25:37 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Common: Force inlining of BitField/SignExtend/ZeroExtend functions

Browse source
This commit is contained in:
Connor McLaughlin 2019-10-26 15:41:43 +10:00
parent a9e0fe6db2
commit c7a7d682bc
2 changed files with 56 additions and 60 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
src/common/bitfield.h
View file

@ -1,4 +1,5 @@
#pragma once #pragma once
#include "types.h"
#include <type_traits> #include <type_traits>
// Disable MSVC warnings that we actually handle // Disable MSVC warnings that we actually handle
@ -10,105 +11,107 @@
template<typename BackingDataType, typename DataType, unsigned BitIndex, unsigned BitCount> template<typename BackingDataType, typename DataType, unsigned BitIndex, unsigned BitCount>
struct BitField struct BitField
{ {
static_assert(!std::is_same_v<DataType, bool> || BitCount == 1, "Boolean bitfields should only be 1 bit");
// We have to delete the copy assignment operator otherwise we can't use this class in anonymous structs/unions. // We have to delete the copy assignment operator otherwise we can't use this class in anonymous structs/unions.
BitField& operator=(const BitField& rhs) = delete; BitField& operator=(const BitField& rhs) = delete;
constexpr BackingDataType GetMask() const ALWAYS_INLINE constexpr BackingDataType GetMask() const
{ {
return ((static_cast<BackingDataType>(~0)) >> (8 * sizeof(BackingDataType) - BitCount)) << BitIndex; return ((static_cast<BackingDataType>(~0)) >> (8 * sizeof(BackingDataType) - BitCount)) << BitIndex;
} }
operator DataType() const { return GetValue(); } ALWAYS_INLINE operator DataType() const { return GetValue(); }
BitField& operator=(DataType value) ALWAYS_INLINE BitField& operator=(DataType value)
{ {
SetValue(value); SetValue(value);
return *this; return *this;
} }
DataType operator++() ALWAYS_INLINE DataType operator++()
{ {
DataType value = GetValue() + 1; DataType value = GetValue() + 1;
SetValue(value); SetValue(value);
return GetValue(); return GetValue();
} }
DataType operator++(int) ALWAYS_INLINE DataType operator++(int)
{ {
DataType value = GetValue(); DataType value = GetValue();
SetValue(value + 1); SetValue(value + 1);
return value; return value;
} }
DataType operator--() ALWAYS_INLINE DataType operator--()
{ {
DataType value = GetValue() - 1; DataType value = GetValue() - 1;
SetValue(value); SetValue(value);
return GetValue(); return GetValue();
} }
DataType operator--(int) ALWAYS_INLINE DataType operator--(int)
{ {
DataType value = GetValue(); DataType value = GetValue();
SetValue(value - 1); SetValue(value - 1);
return value; return value;
} }
BitField& operator+=(DataType rhs) ALWAYS_INLINE BitField& operator+=(DataType rhs)
{ {
SetValue(GetValue() + rhs); SetValue(GetValue() + rhs);
return *this; return *this;
} }
BitField& operator-=(DataType rhs) ALWAYS_INLINE BitField& operator-=(DataType rhs)
{ {
SetValue(GetValue() - rhs); SetValue(GetValue() - rhs);
return *this; return *this;
} }
BitField& operator*=(DataType rhs) ALWAYS_INLINE BitField& operator*=(DataType rhs)
{ {
SetValue(GetValue() * rhs); SetValue(GetValue() * rhs);
return *this; return *this;
} }
BitField& operator/=(DataType rhs) ALWAYS_INLINE BitField& operator/=(DataType rhs)
{ {
SetValue(GetValue() / rhs); SetValue(GetValue() / rhs);
return *this; return *this;
} }
BitField& operator&=(DataType rhs) ALWAYS_INLINE BitField& operator&=(DataType rhs)
{ {
SetValue(GetValue() & rhs); SetValue(GetValue() & rhs);
return *this; return *this;
} }
BitField& operator|=(DataType rhs) ALWAYS_INLINE BitField& operator|=(DataType rhs)
{ {
SetValue(GetValue() | rhs); SetValue(GetValue() | rhs);
return *this; return *this;
} }
BitField& operator^=(DataType rhs) ALWAYS_INLINE BitField& operator^=(DataType rhs)
{ {
SetValue(GetValue() ^ rhs); SetValue(GetValue() ^ rhs);
return *this; return *this;
} }
BitField& operator<<=(DataType rhs) ALWAYS_INLINE BitField& operator<<=(DataType rhs)
{ {
SetValue(GetValue() << rhs); SetValue(GetValue() << rhs);
return *this; return *this;
} }
BitField& operator>>=(DataType rhs) ALWAYS_INLINE BitField& operator>>=(DataType rhs)
{ {
SetValue(GetValue() >> rhs); SetValue(GetValue() >> rhs);
return *this; return *this;
} }
DataType GetValue() const ALWAYS_INLINE DataType GetValue() const
{ {
if constexpr (std::is_same_v<DataType, bool>) if constexpr (std::is_same_v<DataType, bool>)
{ {
@ -125,10 +128,9 @@ struct BitField
} }
} }
void SetValue(DataType value) ALWAYS_INLINE void SetValue(DataType value)
{ {
data &= ~GetMask(); data = (data & ~GetMask()) | (static_cast<BackingDataType>(value) << BitIndex) & GetMask();
data |= (static_cast<BackingDataType>(value) << BitIndex) & GetMask();
} }
BackingDataType data; BackingDataType data;

74
src/common/types.h
View file

@ -42,33 +42,33 @@ using CycleCount = int64_t;
using SimulationTime = int64_t; using SimulationTime = int64_t;
// Helpers for simulation time. // Helpers for simulation time.
constexpr SimulationTime SecondsToSimulationTime(SimulationTime s) ALWAYS_INLINE constexpr SimulationTime SecondsToSimulationTime(SimulationTime s)
{ {
return s * INT64_C(1000000000); return s * INT64_C(1000000000);
} }
constexpr SimulationTime MillisecondsToSimulationTime(SimulationTime ms) ALWAYS_INLINE constexpr SimulationTime MillisecondsToSimulationTime(SimulationTime ms)
{ {
return ms * INT64_C(1000000); return ms * INT64_C(1000000);
} }
constexpr SimulationTime MicrosecondsToSimulationTime(SimulationTime us) ALWAYS_INLINE constexpr SimulationTime MicrosecondsToSimulationTime(SimulationTime us)
{ {
return us * INT64_C(1000); return us * INT64_C(1000);
} }
constexpr SimulationTime SimulationTimeToSeconds(SimulationTime s) ALWAYS_INLINE constexpr SimulationTime SimulationTimeToSeconds(SimulationTime s)
{ {
return s / INT64_C(1000000000); return s / INT64_C(1000000000);
} }
constexpr SimulationTime SimulationTimeToMilliseconds(SimulationTime ms) ALWAYS_INLINE constexpr SimulationTime SimulationTimeToMilliseconds(SimulationTime ms)
{ {
return ms / INT64_C(1000000); return ms / INT64_C(1000000);
} }
constexpr SimulationTime SimulationTimeToMicroseconds(SimulationTime us) ALWAYS_INLINE constexpr SimulationTime SimulationTimeToMicroseconds(SimulationTime us)
{ {
return us / INT64_C(1000); return us / INT64_C(1000);
} }
// Calculates the difference between the specified timestamps, accounting for signed overflow. // Calculates the difference between the specified timestamps, accounting for signed overflow.
constexpr SimulationTime GetSimulationTimeDifference(SimulationTime prev, SimulationTime now) ALWAYS_INLINE constexpr SimulationTime GetSimulationTimeDifference(SimulationTime prev, SimulationTime now)
{ {
if (prev <= now) if (prev <= now)
return now - prev; return now - prev;
@ -78,111 +78,105 @@ constexpr SimulationTime GetSimulationTimeDifference(SimulationTime prev, Simula
// Zero-extending helper // Zero-extending helper
template<typename TReturn, typename TValue> template<typename TReturn, typename TValue>
constexpr TReturn ZeroExtend(TValue value) ALWAYS_INLINE constexpr TReturn ZeroExtend(TValue value)
{ {
// auto unsigned_val = static_cast<typename std::make_unsigned<TValue>::type>(value);
// auto extended_val = static_cast<typename std::make_unsigned<TReturn>::type>(unsigned_val);
// return static_cast<TReturn>(extended_val);
return static_cast<TReturn>(static_cast<typename std::make_unsigned<TReturn>::type>( return static_cast<TReturn>(static_cast<typename std::make_unsigned<TReturn>::type>(
static_cast<typename std::make_unsigned<TValue>::type>(value))); static_cast<typename std::make_unsigned<TValue>::type>(value)));
} }
// Sign-extending helper // Sign-extending helper
template<typename TReturn, typename TValue> template<typename TReturn, typename TValue>
constexpr TReturn SignExtend(TValue value) ALWAYS_INLINE constexpr TReturn SignExtend(TValue value)
{ {
// auto signed_val = static_cast<typename std::make_signed<TValue>::type>(value);
// auto extended_val = static_cast<typename std::make_signed<TReturn>::type>(signed_val);
// return static_cast<TReturn>(extended_val);
return static_cast<TReturn>( return static_cast<TReturn>(
static_cast<typename std::make_signed<TReturn>::type>(static_cast<typename std::make_signed<TValue>::type>(value))); static_cast<typename std::make_signed<TReturn>::type>(static_cast<typename std::make_signed<TValue>::type>(value)));
} }
// Type-specific helpers // Type-specific helpers
template<typename TValue> template<typename TValue>
constexpr u16 ZeroExtend16(TValue value) ALWAYS_INLINE constexpr u16 ZeroExtend16(TValue value)
{ {
return ZeroExtend<u16, TValue>(value); return ZeroExtend<u16, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u32 ZeroExtend32(TValue value) ALWAYS_INLINE constexpr u32 ZeroExtend32(TValue value)
{ {
return ZeroExtend<u32, TValue>(value); return ZeroExtend<u32, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u64 ZeroExtend64(TValue value) ALWAYS_INLINE constexpr u64 ZeroExtend64(TValue value)
{ {
return ZeroExtend<u64, TValue>(value); return ZeroExtend<u64, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u16 SignExtend16(TValue value) ALWAYS_INLINE constexpr u16 SignExtend16(TValue value)
{ {
return SignExtend<u16, TValue>(value); return SignExtend<u16, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u32 SignExtend32(TValue value) ALWAYS_INLINE constexpr u32 SignExtend32(TValue value)
{ {
return SignExtend<u32, TValue>(value); return SignExtend<u32, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u64 SignExtend64(TValue value) ALWAYS_INLINE constexpr u64 SignExtend64(TValue value)
{ {
return SignExtend<u64, TValue>(value); return SignExtend<u64, TValue>(value);
} }
template<typename TValue> template<typename TValue>
constexpr u8 Truncate8(TValue value) ALWAYS_INLINE constexpr u8 Truncate8(TValue value)
{ {
return static_cast<u8>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value)); return static_cast<u8>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value));
} }
template<typename TValue> template<typename TValue>
constexpr u16 Truncate16(TValue value) ALWAYS_INLINE constexpr u16 Truncate16(TValue value)
{ {
return static_cast<u16>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value)); return static_cast<u16>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value));
} }
template<typename TValue> template<typename TValue>
constexpr u32 Truncate32(TValue value) ALWAYS_INLINE constexpr u32 Truncate32(TValue value)
{ {
return static_cast<u32>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value)); return static_cast<u32>(static_cast<typename std::make_unsigned<decltype(value)>::type>(value));
} }
// BCD helpers // BCD helpers
constexpr u8 DecimalToBCD(u8 value) ALWAYS_INLINE constexpr u8 DecimalToBCD(u8 value)
{ {
return ((value / 10) << 4) + (value % 10); return ((value / 10) << 4) + (value % 10);
} }
constexpr u8 BCDToDecimal(u8 value) ALWAYS_INLINE constexpr u8 BCDToDecimal(u8 value)
{ {
return ((value >> 4) * 10) + (value % 16); return ((value >> 4) * 10) + (value % 16);
} }
// Boolean to integer // Boolean to integer
constexpr u8 BoolToUInt8(bool value) ALWAYS_INLINE constexpr u8 BoolToUInt8(bool value)
{ {
return static_cast<u8>(value); return static_cast<u8>(value);
} }
constexpr u16 BoolToUInt16(bool value) ALWAYS_INLINE constexpr u16 BoolToUInt16(bool value)
{ {
return static_cast<u16>(value); return static_cast<u16>(value);
} }
constexpr u32 BoolToUInt32(bool value) ALWAYS_INLINE constexpr u32 BoolToUInt32(bool value)
{ {
return static_cast<u32>(value); return static_cast<u32>(value);
} }
constexpr u64 BoolToUInt64(bool value) ALWAYS_INLINE constexpr u64 BoolToUInt64(bool value)
{ {
return static_cast<u64>(value); return static_cast<u64>(value);
} }
// Integer to boolean // Integer to boolean
template<typename TValue> template<typename TValue>
constexpr bool ConvertToBool(TValue value) ALWAYS_INLINE constexpr bool ConvertToBool(TValue value)
{ {
return static_cast<bool>(value); return static_cast<bool>(value);
} }
// Unsafe integer to boolean // Unsafe integer to boolean
template<typename TValue> template<typename TValue>
constexpr bool ConvertToBoolUnchecked(TValue value) ALWAYS_INLINE constexpr bool ConvertToBoolUnchecked(TValue value)
{ {
// static_assert(sizeof(uint8) == sizeof(bool)); // static_assert(sizeof(uint8) == sizeof(bool));
bool ret; bool ret;
@ -192,7 +186,7 @@ constexpr bool ConvertToBoolUnchecked(TValue value)
// Generic sign extension // Generic sign extension
template<int NBITS, typename T> template<int NBITS, typename T>
constexpr T SignExtendN(T value) ALWAYS_INLINE constexpr T SignExtendN(T value)
{ {
// http://graphics.stanford.edu/~seander/bithacks.html#VariableSignExtend // http://graphics.stanford.edu/~seander/bithacks.html#VariableSignExtend
constexpr int shift = 8 * sizeof(T) - NBITS; constexpr int shift = 8 * sizeof(T) - NBITS;
@ -201,38 +195,38 @@ constexpr T SignExtendN(T value)
// Enum class bitwise operators // Enum class bitwise operators
#define IMPLEMENT_ENUM_CLASS_BITWISE_OPERATORS(type_) \ #define IMPLEMENT_ENUM_CLASS_BITWISE_OPERATORS(type_) \
inline constexpr type_ operator&(type_ lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_ operator&(type_ lhs, type_ rhs) \
{ \ { \
return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) & \ return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) & \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \
} \ } \
inline constexpr type_ operator|(type_ lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_ operator|(type_ lhs, type_ rhs) \
{ \ { \
return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) | \ return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) | \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \
} \ } \
inline constexpr type_ operator^(type_ lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_ operator^(type_ lhs, type_ rhs) \
{ \ { \
return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) ^ \ return static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) ^ \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \
} \ } \
inline constexpr type_ operator~(type_ val) \ ALWAYS_INLINE constexpr type_ operator~(type_ val) \
{ \ { \
return static_cast<type_>(~static_cast<std::underlying_type<type_>::type>(val)); \ return static_cast<type_>(~static_cast<std::underlying_type<type_>::type>(val)); \
} \ } \
inline constexpr type_& operator&=(type_& lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_& operator&=(type_& lhs, type_ rhs) \
{ \ { \
lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) & \ lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) & \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \
return lhs; \ return lhs; \
} \ } \
inline constexpr type_& operator|=(type_& lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_& operator|=(type_& lhs, type_ rhs) \
{ \ { \
lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) | \ lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) | \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \
return lhs; \ return lhs; \
} \ } \
inline constexpr type_& operator^=(type_& lhs, type_ rhs) \ ALWAYS_INLINE constexpr type_& operator^=(type_& lhs, type_ rhs) \
{ \ { \
lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) ^ \ lhs = static_cast<type_>(static_cast<std::underlying_type<type_>::type>(lhs) ^ \
static_cast<std::underlying_type<type_>::type>(rhs)); \ static_cast<std::underlying_type<type_>::type>(rhs)); \