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libqt5-qtdeclarative
V4-Free-up-2-address-bits-in-64bit-mode.patch
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File V4-Free-up-2-address-bits-in-64bit-mode.patch of Package libqt5-qtdeclarative
From 2afb54fb51091765f79548b0b057795bc3c6eb38 Mon Sep 17 00:00:00 2001 From: Erik Verbruggen <erik.verbruggen@digia.com> Date: Fri, 23 Sep 2016 11:34:12 +0200 Subject: [PATCH] V4: Free up 2 address bits in 64bit mode This allows for the OS to use 49 address bits. It also maps JS Undefined to the C++ nullptr on 64bit. Task-number: QTBUG-54822 Change-Id: I7cc90620f499be1506a61aac77d72d067308838c Reviewed-by: Lars Knoll <lars.knoll@qt.io> --- src/qml/debugger/qqmldebug.cpp | 2 +- src/qml/jit/qv4assembler.cpp | 38 +++++- src/qml/jit/qv4assembler_p.h | 5 + src/qml/jit/qv4isel_masm.cpp | 98 ++++++++++---- src/qml/jit/qv4isel_masm_p.h | 4 +- src/qml/jsruntime/qv4scopedvalue_p.h | 2 +- src/qml/jsruntime/qv4value_p.h | 246 ++++++++++++++++++++--------------- src/qml/jsruntime/qv4vme_moth.cpp | 26 ++-- 8 files changed, 269 insertions(+), 152 deletions(-) diff --git a/src/qml/debugger/qqmldebug.cpp b/src/qml/debugger/qqmldebug.cpp index ea98bb1..e864469 100644 --- a/src/qml/debugger/qqmldebug.cpp +++ b/src/qml/debugger/qqmldebug.cpp @@ -132,7 +132,7 @@ quintptr Q_QML_EXPORT qtDeclarativeHookData[] = { // TypeInformationVersion, an integral value, bumped whenever private // object sizes or member offsets that are used in Qt Creator's // data structure "pretty printing" change. - 1 + 2 }; Q_STATIC_ASSERT(HookCount == sizeof(qtDeclarativeHookData) / sizeof(qtDeclarativeHookData[0])); diff --git a/src/qml/jit/qv4assembler.cpp b/src/qml/jit/qv4assembler.cpp index 929726f..b7dbc81 100644 --- a/src/qml/jit/qv4assembler.cpp +++ b/src/qml/jit/qv4assembler.cpp @@ -133,8 +133,30 @@ void Assembler::generateCJumpOnNonZero(RegisterID reg, IR::BasicBlock *currentBl generateCJumpOnCompare(NotEqual, reg, TrustedImm32(0), currentBlock, trueBlock, falseBlock); } -void Assembler::generateCJumpOnCompare(RelationalCondition cond, RegisterID left,TrustedImm32 right, - IR::BasicBlock *currentBlock, IR::BasicBlock *trueBlock, +#ifdef QV4_USE_64_BIT_VALUE_ENCODING +void Assembler::generateCJumpOnCompare(RelationalCondition cond, + RegisterID left, + TrustedImm64 right, + IR::BasicBlock *currentBlock, + IR::BasicBlock *trueBlock, + IR::BasicBlock *falseBlock) +{ + if (trueBlock == _nextBlock) { + Jump target = branch64(invert(cond), left, right); + addPatch(falseBlock, target); + } else { + Jump target = branch64(cond, left, right); + addPatch(trueBlock, target); + jumpToBlock(currentBlock, falseBlock); + } +} +#endif + +void Assembler::generateCJumpOnCompare(RelationalCondition cond, + RegisterID left, + TrustedImm32 right, + IR::BasicBlock *currentBlock, + IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock) { if (trueBlock == _nextBlock) { @@ -147,8 +169,11 @@ void Assembler::generateCJumpOnCompare(RelationalCondition cond, RegisterID left } } -void Assembler::generateCJumpOnCompare(RelationalCondition cond, RegisterID left, RegisterID right, - IR::BasicBlock *currentBlock, IR::BasicBlock *trueBlock, +void Assembler::generateCJumpOnCompare(RelationalCondition cond, + RegisterID left, + RegisterID right, + IR::BasicBlock *currentBlock, + IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock) { if (trueBlock == _nextBlock) { @@ -334,9 +359,8 @@ Assembler::Jump Assembler::genTryDoubleConversion(IR::Expr *src, Assembler::FPRe // not an int, check if it's a double: isNoInt.link(this); #ifdef QV4_USE_64_BIT_VALUE_ENCODING - and32(Assembler::TrustedImm32(Value::IsDouble_Mask), Assembler::ScratchRegister); - Assembler::Jump isNoDbl = branch32(Assembler::Equal, Assembler::ScratchRegister, - Assembler::TrustedImm32(0)); + rshift32(TrustedImm32(Value::IsDoubleTag_Shift), ScratchRegister); + Assembler::Jump isNoDbl = branch32(Equal, ScratchRegister, TrustedImm32(0)); #else and32(Assembler::TrustedImm32(Value::NotDouble_Mask), Assembler::ScratchRegister); Assembler::Jump isNoDbl = branch32(Assembler::Equal, Assembler::ScratchRegister, diff --git a/src/qml/jit/qv4assembler_p.h b/src/qml/jit/qv4assembler_p.h index 532a311..ba9ca66 100644 --- a/src/qml/jit/qv4assembler_p.h +++ b/src/qml/jit/qv4assembler_p.h @@ -374,6 +374,11 @@ class Assembler : public JSC::MacroAssembler, public TargetPlatform void addPatch(DataLabelPtr patch, IR::BasicBlock *target); void generateCJumpOnNonZero(RegisterID reg, IR::BasicBlock *currentBlock, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); +#ifdef QV4_USE_64_BIT_VALUE_ENCODING + void generateCJumpOnCompare(RelationalCondition cond, RegisterID left, TrustedImm64 right, + IR::BasicBlock *currentBlock, IR::BasicBlock *trueBlock, + IR::BasicBlock *falseBlock); +#endif void generateCJumpOnCompare(RelationalCondition cond, RegisterID left, TrustedImm32 right, IR::BasicBlock *currentBlock, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); diff --git a/src/qml/jit/qv4isel_masm.cpp b/src/qml/jit/qv4isel_masm.cpp index b6df5fb..1913b39 100644 --- a/src/qml/jit/qv4isel_masm.cpp +++ b/src/qml/jit/qv4isel_masm.cpp @@ -703,7 +703,7 @@ void InstructionSelection::loadString(const QString &str, IR::Expr *target) #else _as->store32(Assembler::ReturnValueRegister, destAddr); destAddr.offset += 4; - _as->store32(Assembler::TrustedImm32(QV4::Value::Managed_Type), destAddr); + _as->store32(Assembler::TrustedImm32(QV4::Value::Managed_Type_Internal), destAddr); #endif } @@ -1103,7 +1103,7 @@ void InstructionSelection::convertTypeToDouble(IR::Expr *source, IR::Expr *targe // not an int, check if it's NOT a double: isNoInt.link(_as); #ifdef QV4_USE_64_BIT_VALUE_ENCODING - _as->and32(Assembler::TrustedImm32(Value::IsDouble_Mask), Assembler::ScratchRegister); + _as->rshift32(Assembler::TrustedImm32(Value::IsDoubleTag_Shift), Assembler::ScratchRegister); Assembler::Jump isDbl = _as->branch32(Assembler::NotEqual, Assembler::ScratchRegister, Assembler::TrustedImm32(0)); #else @@ -1194,10 +1194,15 @@ void InstructionSelection::convertTypeToSInt32(IR::Expr *source, IR::Expr *targe _as->load64(addr, Assembler::ScratchRegister); _as->move(Assembler::ScratchRegister, Assembler::ReturnValueRegister); - // check if it's a number - _as->urshift64(Assembler::TrustedImm32(QV4::Value::IsNumber_Shift), Assembler::ScratchRegister); - Assembler::Jump isInt = _as->branch32(Assembler::Equal, Assembler::ScratchRegister, Assembler::TrustedImm32(1)); - Assembler::Jump fallback = _as->branch32(Assembler::Equal, Assembler::ScratchRegister, Assembler::TrustedImm32(0)); + // check if it's integer convertible + _as->urshift64(Assembler::TrustedImm32(QV4::Value::IsIntegerConvertible_Shift), Assembler::ScratchRegister); + Assembler::Jump isIntConvertible = _as->branch32(Assembler::Equal, Assembler::ScratchRegister, Assembler::TrustedImm32(3)); + + // nope, not integer convertible, so check for a double: + _as->urshift64(Assembler::TrustedImm32( + QV4::Value::IsDoubleTag_Shift - QV4::Value::IsIntegerConvertible_Shift), + Assembler::ScratchRegister); + Assembler::Jump fallback = _as->branch32(Assembler::GreaterThan, Assembler::ScratchRegister, Assembler::TrustedImm32(0)); // it's a double _as->move(Assembler::TrustedImm64(QV4::Value::NaNEncodeMask), Assembler::ScratchRegister); @@ -1212,7 +1217,7 @@ void InstructionSelection::convertTypeToSInt32(IR::Expr *source, IR::Expr *targe generateFunctionCall(Assembler::ReturnValueRegister, Runtime::toInt, _as->loadAddress(Assembler::ScratchRegister, source)); - isInt.link(_as); + isIntConvertible.link(_as); success.link(_as); IR::Temp *targetTemp = target->asTemp(); if (!targetTemp || targetTemp->kind == IR::Temp::StackSlot) { @@ -1784,9 +1789,9 @@ void InstructionSelection::visitCJumpStrict(IR::Binop *binop, IR::BasicBlock *tr { Q_ASSERT(binop->op == IR::OpStrictEqual || binop->op == IR::OpStrictNotEqual); - if (visitCJumpStrictNullUndefined(IR::NullType, binop, trueBlock, falseBlock)) + if (visitCJumpStrictNull(binop, trueBlock, falseBlock)) return; - if (visitCJumpStrictNullUndefined(IR::UndefinedType, binop, trueBlock, falseBlock)) + if (visitCJumpStrictUndefined(binop, trueBlock, falseBlock)) return; if (visitCJumpStrictBool(binop, trueBlock, falseBlock)) return; @@ -1802,16 +1807,14 @@ void InstructionSelection::visitCJumpStrict(IR::Binop *binop, IR::BasicBlock *tr } // Only load the non-null temp. -bool InstructionSelection::visitCJumpStrictNullUndefined(IR::Type nullOrUndef, IR::Binop *binop, - IR::BasicBlock *trueBlock, - IR::BasicBlock *falseBlock) +bool InstructionSelection::visitCJumpStrictNull(IR::Binop *binop, + IR::BasicBlock *trueBlock, + IR::BasicBlock *falseBlock) { - Q_ASSERT(nullOrUndef == IR::NullType || nullOrUndef == IR::UndefinedType); - IR::Expr *varSrc = 0; - if (binop->left->type == IR::VarType && binop->right->type == nullOrUndef) + if (binop->left->type == IR::VarType && binop->right->type == IR::NullType) varSrc = binop->left; - else if (binop->left->type == nullOrUndef && binop->right->type == IR::VarType) + else if (binop->left->type == IR::NullType && binop->right->type == IR::VarType) varSrc = binop->right; if (!varSrc) return false; @@ -1822,7 +1825,7 @@ bool InstructionSelection::visitCJumpStrictNullUndefined(IR::Type nullOrUndef, I } if (IR::Const *c = varSrc->asConst()) { - if (c->type == nullOrUndef) + if (c->type == IR::NullType) _as->jumpToBlock(_block, trueBlock); else _as->jumpToBlock(_block, falseBlock); @@ -1835,9 +1838,54 @@ bool InstructionSelection::visitCJumpStrictNullUndefined(IR::Type nullOrUndef, I _as->load32(tagAddr, tagReg); Assembler::RelationalCondition cond = binop->op == IR::OpStrictEqual ? Assembler::Equal - : Assembler::NotEqual; - const Assembler::TrustedImm32 tag(nullOrUndef == IR::NullType ? int(QV4::Value::Null_Type_Internal) - : int(QV4::Value::Undefined_Type)); + : Assembler::NotEqual; + const Assembler::TrustedImm32 tag(QV4::Value::Null_Type_Internal); + _as->generateCJumpOnCompare(cond, tagReg, tag, _block, trueBlock, falseBlock); + return true; +} + +bool InstructionSelection::visitCJumpStrictUndefined(IR::Binop *binop, + IR::BasicBlock *trueBlock, + IR::BasicBlock *falseBlock) +{ + IR::Expr *varSrc = 0; + if (binop->left->type == IR::VarType && binop->right->type == IR::UndefinedType) + varSrc = binop->left; + else if (binop->left->type == IR::UndefinedType && binop->right->type == IR::VarType) + varSrc = binop->right; + if (!varSrc) + return false; + + if (varSrc->asTemp() && varSrc->asTemp()->kind == IR::Temp::PhysicalRegister) { + _as->jumpToBlock(_block, falseBlock); + return true; + } + + if (IR::Const *c = varSrc->asConst()) { + if (c->type == IR::UndefinedType) + _as->jumpToBlock(_block, trueBlock); + else + _as->jumpToBlock(_block, falseBlock); + return true; + } + + Assembler::RelationalCondition cond = binop->op == IR::OpStrictEqual ? Assembler::Equal + : Assembler::NotEqual; + const Assembler::RegisterID tagReg = Assembler::ScratchRegister; +#ifdef QV4_USE_64_BIT_VALUE_ENCODING + Assembler::Pointer addr = _as->loadAddress(Assembler::ScratchRegister, varSrc); + _as->load64(addr, tagReg); + const Assembler::TrustedImm64 tag(0); +#else // !QV4_USE_64_BIT_VALUE_ENCODING + Assembler::Pointer tagAddr = _as->loadAddress(Assembler::ScratchRegister, varSrc); + _as->load32(tagAddr, tagReg); + Assembler::Jump j = _as->branch32(Assembler::invert(cond), tagReg, Assembler::TrustedImm32(0)); + _as->addPatch(falseBlock, j); + + tagAddr.offset += 4; + _as->load32(tagAddr, tagReg); + const Assembler::TrustedImm32 tag(QV4::Value::Managed_Type_Internal); +#endif _as->generateCJumpOnCompare(cond, tagReg, tag, _block, trueBlock, falseBlock); return true; } @@ -1928,10 +1976,14 @@ bool InstructionSelection::visitCJumpNullUndefined(IR::Type nullOrUndef, IR::Bin if (binop->op == IR::OpNotEqual) qSwap(trueBlock, falseBlock); Assembler::Jump isNull = _as->branch32(Assembler::Equal, tagReg, Assembler::TrustedImm32(int(QV4::Value::Null_Type_Internal))); - Assembler::Jump isUndefined = _as->branch32(Assembler::Equal, tagReg, Assembler::TrustedImm32(int(QV4::Value::Undefined_Type))); + Assembler::Jump isNotUndefinedTag = _as->branch32(Assembler::NotEqual, tagReg, Assembler::TrustedImm32(int(QV4::Value::Managed_Type_Internal))); + tagAddr.offset -= 4; + _as->load32(tagAddr, tagReg); + Assembler::Jump isNotUndefinedValue = _as->branch32(Assembler::NotEqual, tagReg, Assembler::TrustedImm32(0)); _as->addPatch(trueBlock, isNull); - _as->addPatch(trueBlock, isUndefined); - _as->jumpToBlock(_block, falseBlock); + _as->addPatch(falseBlock, isNotUndefinedTag); + _as->addPatch(falseBlock, isNotUndefinedValue); + _as->jumpToBlock(_block, trueBlock); return true; } diff --git a/src/qml/jit/qv4isel_masm_p.h b/src/qml/jit/qv4isel_masm_p.h index 6e9b02b..f6d9364 100644 --- a/src/qml/jit/qv4isel_masm_p.h +++ b/src/qml/jit/qv4isel_masm_p.h @@ -166,8 +166,8 @@ class Q_QML_EXPORT InstructionSelection: bool visitCJumpSInt32(IR::AluOp op, IR::Expr *left, IR::Expr *right, IR::BasicBlock *iftrue, IR::BasicBlock *iffalse); void visitCJumpStrict(IR::Binop *binop, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); - bool visitCJumpStrictNullUndefined(IR::Type nullOrUndef, IR::Binop *binop, - IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); + bool visitCJumpStrictNull(IR::Binop *binop, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); + bool visitCJumpStrictUndefined(IR::Binop *binop, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); bool visitCJumpStrictBool(IR::Binop *binop, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); bool visitCJumpNullUndefined(IR::Type nullOrUndef, IR::Binop *binop, IR::BasicBlock *trueBlock, IR::BasicBlock *falseBlock); diff --git a/src/qml/jsruntime/qv4scopedvalue_p.h b/src/qml/jsruntime/qv4scopedvalue_p.h index 0b063ee..ca23f83 100644 --- a/src/qml/jsruntime/qv4scopedvalue_p.h +++ b/src/qml/jsruntime/qv4scopedvalue_p.h @@ -309,7 +309,7 @@ struct ScopedCallData { { int size = qMax(argc, (int)QV4::Global::ReservedArgumentCount) + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value); ptr = reinterpret_cast<CallData *>(scope.alloc(size)); - ptr->tag = QV4::Value::Integer_Type; + ptr->tag = QV4::Value::Integer_Type_Internal; ptr->argc = argc; } diff --git a/src/qml/jsruntime/qv4value_p.h b/src/qml/jsruntime/qv4value_p.h index 5abf5ad..02425c5 100644 --- a/src/qml/jsruntime/qv4value_p.h +++ b/src/qml/jsruntime/qv4value_p.h @@ -70,23 +70,85 @@ struct Q_QML_PRIVATE_EXPORT Value /* We use two different ways of encoding JS values. One for 32bit and one for 64bit systems. - In both cases, we use 8 bytes for a value and a different variant of NaN boxing. A Double NaN (actually -qNaN) - is indicated by a number that has the top 13 bits set. The other values are usually set to 0 by the - processor, and are thus free for us to store other data. We keep pointers in there for managed objects, - and encode the other types using the free space given to use by the unused bits for NaN values. This also - works for pointers on 64 bit systems, as they all currently only have 48 bits of addressable memory. - - On 32bit, we store doubles as doubles. All other values, have the high 32bits set to a value that - will make the number a NaN. The Masks below are used for encoding the other types. - - On 64 bit, we xor Doubles with (0xffff8000 << 32). That has the effect that no doubles will get encoded - with the 13 highest bits all 0. We are now using special values for bits 14-17 to encode our values. These - can be used, as the highest valid pointer on a 64 bit system is 2^48-1. - - If they are all 0, we have a pointer to a Managed object. If bit 14 is set we have an integer. - This makes testing for pointers and numbers very fast (we have a number if any of the highest 14 bits is set). - - Bit 15-17 is then used to encode other immediates. + In both cases, we use 8 bytes for a value and a different variant of NaN boxing. A Double + NaN (actually -qNaN) is indicated by a number that has the top 13 bits set, and for a + signalling NaN it is the top 14 bits. The other values are usually set to 0 by the + processor, and are thus free for us to store other data. We keep pointers in there for + managed objects, and encode the other types using the free space given to use by the unused + bits for NaN values. This also works for pointers on 64 bit systems, as they all currently + only have 48 bits of addressable memory. (Note: we do leave the lower 49 bits available for + pointers.) + + On 32bit, we store doubles as doubles. All other values, have the high 32bits set to a value + that will make the number a NaN. The Masks below are used for encoding the other types. + + On 64 bit, we xor Doubles with (0xffff8000 << 32). That has the effect that no doubles will + get encoded with bits 63-49 all set to 0. We then use bit 48 to distinguish between + managed/undefined (0), or Null/Int/Bool/Empty (1). So, storing a 49 bit pointer will leave + the top 15 bits 0, which is exactly the 'natural' representation of pointers. If bit 49 is + set, bit 48 indicates Empty (0) or integer-convertible (1). Then the 3 bit below that are + used to encode Null/Int/Bool. + + On both 32bit and 64bit, Undefined is encoded as a managed pointer with value 0. This is + the same as a nullptr. + + Specific bit-sequences: + 0 = always 0 + 1 = always 1 + x = stored value + a,b,c,d = specific bit values, see notes + + 64bit: + + 32109876 54321098 76543210 98765432 10987654 32109876 54321098 76543210 | + 66665555 55555544 44444444 33333333 33222222 22221111 11111100 00000000 | JS Value + ------------------------------------------------------------------------+-------------- + 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 | Undefined + 00000000 0000000x xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | Managed (heap pointer) + a0000000 0000bc00 00000000 00000000 00000000 00000000 00000000 00000000 | NaN/Inf + dddddddd ddddddxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | double + 00000000 00000010 00000000 00000000 00000000 00000000 00000000 00000000 | empty (non-sparse array hole) + 00000000 00000011 10000000 00000000 00000000 00000000 00000000 00000000 | Null + 00000000 00000011 01000000 00000000 00000000 00000000 00000000 0000000x | Bool + 00000000 00000011 00100000 00000000 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | Int + + Notes: + - a: xor-ed signbit, always 1 for NaN + - bc, xor-ed values: 11 = inf, 10 = sNaN, 01 = qNaN, 00 = boxed value + - d: xor-ed bits, where at least one bit is set, so: (val >> (64-14)) > 0 + - Undefined maps to C++ nullptr, so the "default" initialization is the same for both C++ + and JS + - Managed has the left 15 bits set to 0, so: (val >> (64-15)) == 0 + - empty, Null, Bool, and Int have the left 14 bits set to 0, and bit 49 set to 1, + so: (val >> (64-15)) == 1 + - Null, Bool, and Int have bit 48 set, indicating integer-convertible + - xoring _val with NaNEncodeMask will convert to a double in "natural" representation, where + any non double results in a NaN + + 32bit: + + 32109876 54321098 76543210 98765432 10987654 32109876 54321098 76543210 | + 66665555 55555544 44444444 33333333 33222222 22221111 11111100 00000000 | JS Value + ------------------------------------------------------------------------+-------------- + 01111111 11111100 00000000 00000000 00000000 00000000 00000000 00000000 | Undefined + 01111111 11111100 00000000 00000000 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | Managed (heap pointer) + a1111111 1111bc00 00000000 00000000 00000000 00000000 00000000 00000000 | NaN/Inf + xddddddd ddddddxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | double + 01111111 11111110 00000000 00000000 00000000 00000000 00000000 00000000 | empty (non-sparse array hole) + 01111111 11111111 10000000 00000000 00000000 00000000 00000000 00000000 | Null + 01111111 11111111 01000000 00000000 00000000 00000000 00000000 0000000x | Bool + 01111111 11111111 00100000 00000000 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | Int + + Notes: + - the upper 32 bits are the tag, the lower 32 bits the value + - Undefined has a nullptr in the value, Managed has a non-nullptr stored in the value + - a: sign bit, always 0 for NaN + - b,c: 00=inf, 01 = sNaN, 10 = qNaN, 11 = boxed value + - d: stored double value, as long as not *all* of them are 1, because that's a boxed value + (see above) + - empty, Null, Bool, and Int have bit 63 set to 0, bits 62-50 set to 1 (same as undefined + and managed), and bit 49 set to 1 (where undefined and managed have it set to 0) + - Null, Bool, and Int have bit 48 set, indicating integer-convertible */ quint64 _val; @@ -137,7 +199,7 @@ struct Q_QML_PRIVATE_EXPORT Value { quint32 v; memcpy(&v, &b, 4); - setTagValue(Managed_Type, v); + setTagValue(Managed_Type_Internal, v); } #endif @@ -153,12 +215,32 @@ struct Q_QML_PRIVATE_EXPORT Value Q_ALWAYS_INLINE void setEmpty() { - setTagValue(Empty_Type, value()); + setTagValue(Empty_Type_Internal, value()); } Q_ALWAYS_INLINE void setEmpty(int i) { - setTagValue(Empty_Type, quint32(i)); + setTagValue(Empty_Type_Internal, quint32(i)); + } + + enum Type { + Undefined_Type, + Managed_Type, + Empty_Type, + Integer_Type, + Boolean_Type, + Null_Type, + Double_Type + }; + + inline Type type() const { + if (isUndefined()) return Undefined_Type; + if (isManaged()) return Managed_Type; + if (isEmpty()) return Empty_Type; + if (isInteger()) return Integer_Type; + if (isBoolean()) return Boolean_Type; + if (isNull()) return Null_Type; + Q_ASSERT(isDouble()); return Double_Type; } #ifndef QV4_USE_64_BIT_VALUE_ENCODING @@ -166,101 +248,64 @@ struct Q_QML_PRIVATE_EXPORT Value SilentNaNBit = 0x00040000, NaN_Mask = 0x7ff80000, NotDouble_Mask = 0x7ffa0000, - Type_Mask = 0xffffc000, - Immediate_Mask = NotDouble_Mask | 0x00004000 | SilentNaNBit, - IsNullOrUndefined_Mask = Immediate_Mask | 0x08000, + Immediate_Mask = NotDouble_Mask | 0x00020000u | SilentNaNBit, Tag_Shift = 32 }; - enum ValueType { - Undefined_Type = Immediate_Mask | 0x00000, - Null_Type = Immediate_Mask | 0x10000, - Boolean_Type = Immediate_Mask | 0x08000, - Integer_Type = Immediate_Mask | 0x18000, - Managed_Type = NotDouble_Mask | 0x00000 | SilentNaNBit, - Empty_Type = NotDouble_Mask | 0x18000 | SilentNaNBit - }; - - enum ImmediateFlags { - ConvertibleToInt = Immediate_Mask | 0x1 - }; - - enum ValueTypeInternal { - Null_Type_Internal = Null_Type | ConvertibleToInt, - Boolean_Type_Internal = Boolean_Type | ConvertibleToInt, - Integer_Type_Internal = Integer_Type | ConvertibleToInt, + enum { + Managed_Type_Internal = NotDouble_Mask }; #else - static const quint64 NaNEncodeMask = 0xffff800000000000ll; - static const quint64 IsInt32Mask = 0x0002000000000000ll; - static const quint64 IsDoubleMask = 0xfffc000000000000ll; - static const quint64 IsNumberMask = IsInt32Mask|IsDoubleMask; - static const quint64 IsNullOrUndefinedMask = 0x0000800000000000ll; - static const quint64 IsNullOrBooleanMask = 0x0001000000000000ll; - static const quint64 IsConvertibleToIntMask = IsInt32Mask|IsNullOrBooleanMask; + static const quint64 NaNEncodeMask = 0xfffc000000000000ll; + static const quint64 Immediate_Mask = 0x00020000u; // bit 49 enum Masks { NaN_Mask = 0x7ff80000, - Type_Mask = 0xffff8000, - IsDouble_Mask = 0xfffc0000, - Immediate_Mask = 0x00018000, - IsNullOrUndefined_Mask = 0x00008000, - IsNullOrBoolean_Mask = 0x00010000, - Tag_Shift = 32 - }; - enum ValueType { - Undefined_Type = IsNullOrUndefined_Mask, - Null_Type = IsNullOrUndefined_Mask|IsNullOrBoolean_Mask, - Boolean_Type = IsNullOrBoolean_Mask, - Integer_Type = 0x20000|IsNullOrBoolean_Mask, - Managed_Type = 0, - Empty_Type = Undefined_Type | 0x4000 }; enum { IsDouble_Shift = 64-14, - IsNumber_Shift = 64-15, - IsConvertibleToInt_Shift = 64-16, - IsManaged_Shift = 64-17 + IsManagedOrUndefined_Shift = 64-15, + IsIntegerConvertible_Shift = 64-16, + Tag_Shift = 32, + IsDoubleTag_Shift = IsDouble_Shift - Tag_Shift, + Managed_Type_Internal = 0 }; - - +#endif enum ValueTypeInternal { - Null_Type_Internal = Null_Type, - Boolean_Type_Internal = Boolean_Type, - Integer_Type_Internal = Integer_Type + Empty_Type_Internal = Immediate_Mask | 0, + ConvertibleToInt = Immediate_Mask | 0x10000u, // bit 48 + Null_Type_Internal = ConvertibleToInt | 0x08000u, + Boolean_Type_Internal = ConvertibleToInt | 0x04000u, + Integer_Type_Internal = ConvertibleToInt | 0x02000u }; -#endif - - inline unsigned type() const { - return tag() & Type_Mask; - } // used internally in property - inline bool isEmpty() const { return tag() == Empty_Type; } - - inline bool isUndefined() const { return tag() == Undefined_Type; } + inline bool isEmpty() const { return tag() == Empty_Type_Internal; } inline bool isNull() const { return tag() == Null_Type_Internal; } - inline bool isBoolean() const { return tag ()== Boolean_Type_Internal; } + inline bool isBoolean() const { return tag() == Boolean_Type_Internal; } + inline bool isInteger() const { return tag() == Integer_Type_Internal; } + inline bool isNullOrUndefined() const { return isNull() || isUndefined(); } + inline bool isNumber() const { return isDouble() || isInteger(); } + #ifdef QV4_USE_64_BIT_VALUE_ENCODING - inline bool isInteger() const { return (_val >> IsNumber_Shift) == 1; } + inline bool isUndefined() const { return _val == 0; } inline bool isDouble() const { return (_val >> IsDouble_Shift); } - inline bool isNumber() const { return (_val >> IsNumber_Shift); } - inline bool isManaged() const { return !(_val >> IsManaged_Shift); } - inline bool isNullOrUndefined() const { return ((_val >> IsManaged_Shift) & ~2) == 1; } - inline bool integerCompatible() const { return ((_val >> IsConvertibleToInt_Shift) & ~2) == 1; } + inline bool isManaged() const { return !isUndefined() && ((_val >> IsManagedOrUndefined_Shift) == 0); } + + inline bool integerCompatible() const { + return (_val >> IsIntegerConvertible_Shift) == 3; + } static inline bool integerCompatible(Value a, Value b) { return a.integerCompatible() && b.integerCompatible(); } static inline bool bothDouble(Value a, Value b) { return a.isDouble() && b.isDouble(); } - inline bool isNaN() const { return (tag() & 0x7fff8000) == 0x00078000; } + inline bool isNaN() const { return (tag() & 0x7ffc0000 ) == 0x00040000; } #else - inline bool isInteger() const { return tag() == Integer_Type_Internal; } + inline bool isUndefined() const { return tag() == Managed_Type_Internal && value() == 0; } inline bool isDouble() const { return (tag() & NotDouble_Mask) != NotDouble_Mask; } - inline bool isNumber() const { return tag() == Integer_Type_Internal || (tag() & NotDouble_Mask) != NotDouble_Mask; } - inline bool isManaged() const { return tag() == Managed_Type; } - inline bool isNullOrUndefined() const { return (tag() & IsNullOrUndefined_Mask) == Undefined_Type; } + inline bool isManaged() const { return tag() == Managed_Type_Internal && !isUndefined(); } inline bool integerCompatible() const { return (tag() & ConvertibleToInt) == ConvertibleToInt; } static inline bool integerCompatible(Value a, Value b) { return ((a.tag() & b.tag()) & ConvertibleToInt) == ConvertibleToInt; @@ -500,14 +545,14 @@ struct Q_QML_PRIVATE_EXPORT Primitive : public Value inline Primitive Primitive::undefinedValue() { Primitive v; - v.setTagValue(Undefined_Type, 0); + v.setM(Q_NULLPTR); return v; } inline Primitive Primitive::emptyValue() { Primitive v; - v.setTagValue(Value::Empty_Type, 0); + v.setEmpty(0); return v; } @@ -535,7 +580,6 @@ inline Primitive Primitive::fromDouble(double d) inline Primitive Primitive::fromInt32(int i) { Primitive v; - v.setTagValue(Integer_Type_Internal, 0); v.setInt_32(i); return v; } @@ -553,31 +597,23 @@ inline Primitive Primitive::fromUInt32(uint i) struct Encode { static ReturnedValue undefined() { - return quint64(Value::Undefined_Type) << Value::Tag_Shift; + return Primitive::undefinedValue().rawValue(); } static ReturnedValue null() { - return quint64(Value::Null_Type_Internal) << Value::Tag_Shift; + return Primitive::nullValue().rawValue(); } Encode(bool b) { - val = (quint64(Value::Boolean_Type_Internal) << Value::Tag_Shift) | (uint)b; + val = Primitive::fromBoolean(b).rawValue(); } Encode(double d) { - Value v; - v.setDouble(d); - val = v.rawValue(); + val = Primitive::fromDouble(d).rawValue(); } Encode(int i) { - val = (quint64(Value::Integer_Type_Internal) << Value::Tag_Shift) | (uint)i; + val = Primitive::fromInt32(i).rawValue(); } Encode(uint i) { - if (i <= INT_MAX) { - val = (quint64(Value::Integer_Type_Internal) << Value::Tag_Shift) | i; - } else { - Value v; - v.setDouble(i); - val = v.rawValue(); - } + val = Primitive::fromUInt32(i).rawValue(); } Encode(ReturnedValue v) { val = v; diff --git a/src/qml/jsruntime/qv4vme_moth.cpp b/src/qml/jsruntime/qv4vme_moth.cpp index 024a72b..4688908 100644 --- a/src/qml/jsruntime/qv4vme_moth.cpp +++ b/src/qml/jsruntime/qv4vme_moth.cpp @@ -563,7 +563,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code #endif // DO_TRACE_INSTR Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::callValue(engine, VALUE(instr.dest), callData)); @@ -573,7 +573,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code TRACE(property name, "%s, args=%u, argc=%u, this=%s", qPrintable(runtimeStrings[instr.name]->toQString()), instr.callData, instr.argc, (VALUE(instr.base)).toString(context)->toQString().toUtf8().constData()); Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::callProperty(engine, instr.name, callData)); @@ -582,7 +582,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CallPropertyLookup) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::callPropertyLookup(engine, instr.lookupIndex, callData)); @@ -592,7 +592,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code TRACE(property name, "%s, args=%u, argc=%u, this=%s", qPrintable(runtimeStrings[instr.name]->toQString()), instr.callData, instr.argc, (VALUE(instr.base)).toString(context)->toQString().toUtf8().constData()); Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::callQmlScopeObjectProperty(engine, instr.index, callData)); @@ -602,7 +602,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code TRACE(property name, "%s, args=%u, argc=%u, this=%s", qPrintable(runtimeStrings[instr.name]->toQString()), instr.callData, instr.argc, (VALUE(instr.base)).toString(context)->toQString().toUtf8().constData()); Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::callQmlContextObjectProperty(engine, instr.index, callData)); @@ -611,7 +611,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CallElement) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::callElement(engine, VALUE(instr.index), callData)); @@ -620,7 +620,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CallActivationProperty) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::callActivationProperty(engine, instr.name, callData)); @@ -629,7 +629,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CallGlobalLookup) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::callGlobalLookup(engine, instr.index, callData)); @@ -735,7 +735,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CreateValue) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::constructValue(engine, VALUE(instr.func), callData)); @@ -744,7 +744,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CreateProperty) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::constructProperty(engine, instr.name, callData)); @@ -753,7 +753,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(ConstructPropertyLookup) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = VALUE(instr.base); STOREVALUE(instr.result, Runtime::constructPropertyLookup(engine, instr.index, callData)); @@ -762,7 +762,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(CreateActivationProperty) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::constructActivationProperty(engine, instr.name, callData)); @@ -771,7 +771,7 @@ QV4::ReturnedValue VME::run(ExecutionEngine *engine, const uchar *code MOTH_BEGIN_INSTR(ConstructGlobalLookup) Q_ASSERT(instr.callData + instr.argc + qOffsetOf(QV4::CallData, args)/sizeof(QV4::Value) <= stackSize); QV4::CallData *callData = reinterpret_cast<QV4::CallData *>(stack + instr.callData); - callData->tag = QV4::Value::Integer_Type; + callData->tag = QV4::Value::Integer_Type_Internal; callData->argc = instr.argc; callData->thisObject = QV4::Primitive::undefinedValue(); STOREVALUE(instr.result, Runtime::constructGlobalLookup(engine, instr.index, callData));
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