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# Copyright (C) 2011-2019 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.
# Utilities.
macro nextInstruction()
loadb [PB, PC, 1], t0
leap _g_opcodeMap, t1
jmp [t1, t0, PtrSize], BytecodePtrTag
end
macro nextInstructionWide16()
loadb OpcodeIDNarrowSize[PB, PC, 1], t0
leap _g_opcodeMapWide16, t1
jmp [t1, t0, PtrSize], BytecodePtrTag
end
macro nextInstructionWide32()
loadb OpcodeIDNarrowSize[PB, PC, 1], t0
leap _g_opcodeMapWide32, t1
jmp [t1, t0, PtrSize], BytecodePtrTag
end
macro storePC()
storei PC, LLIntReturnPC[cfr]
end
macro loadPC()
loadi LLIntReturnPC[cfr], PC
end
macro getuOperandNarrow(opcodeStruct, fieldName, dst)
loadb constexpr %opcodeStruct%_%fieldName%_index + OpcodeIDNarrowSize[PB, PC, 1], dst
end
macro getOperandNarrow(opcodeStruct, fieldName, dst)
loadbsq constexpr %opcodeStruct%_%fieldName%_index + OpcodeIDNarrowSize[PB, PC, 1], dst
end
macro getuOperandWide16(opcodeStruct, fieldName, dst)
loadh constexpr %opcodeStruct%_%fieldName%_index * 2 + OpcodeIDWide16Size[PB, PC, 1], dst
end
macro getOperandWide16(opcodeStruct, fieldName, dst)
loadhsq constexpr %opcodeStruct%_%fieldName%_index * 2 + OpcodeIDWide16Size[PB, PC, 1], dst
end
macro getuOperandWide32(opcodeStruct, fieldName, dst)
loadi constexpr %opcodeStruct%_%fieldName%_index * 4 + OpcodeIDWide32Size[PB, PC, 1], dst
end
macro getOperandWide32(opcodeStruct, fieldName, dst)
loadis constexpr %opcodeStruct%_%fieldName%_index * 4 + OpcodeIDWide32Size[PB, PC, 1], dst
end
macro makeReturn(get, dispatch, fn)
fn(macro (value)
move value, t2
get(m_dst, t1)
storeq t2, [cfr, t1, 8]
dispatch()
end)
end
macro makeReturnProfiled(opcodeStruct, get, metadata, dispatch, fn)
fn(macro (value)
move value, t3
metadata(t1, t2)
valueProfile(opcodeStruct, t1, t3)
get(m_dst, t1)
storeq t3, [cfr, t1, 8]
dispatch()
end)
end
macro valueProfile(opcodeStruct, metadata, value)
storeq value, %opcodeStruct%::Metadata::m_profile.m_buckets[metadata]
end
# After calling, calling bytecode is claiming input registers are not used.
macro dispatchAfterCall(size, opcodeStruct, dispatch)
loadPC()
loadp CodeBlock[cfr], PB
loadp CodeBlock::m_instructionsRawPointer[PB], PB
get(size, opcodeStruct, m_dst, t1)
storeq r0, [cfr, t1, 8]
metadata(size, opcodeStruct, t2, t1)
valueProfile(opcodeStruct, t2, r0)
dispatch()
end
macro cCall2(function)
checkStackPointerAlignment(t4, 0xbad0c002)
if X86_64 or ARM64 or ARM64E
call function
elsif X86_64_WIN
# Note: this implementation is only correct if the return type size is > 8 bytes.
# See macro cCall2Void for an implementation when the return type <= 8 bytes.
# On Win64, when the return type is larger than 8 bytes, we need to allocate space on the stack for the return value.
# On entry rcx (a0), should contain a pointer to this stack space. The other parameters are shifted to the right,
# rdx (a1) should contain the first argument, and r8 (a2) should contain the second argument.
# On return, rax contains a pointer to this stack value, and we then need to copy the 16 byte return value into rax (r0) and rdx (r1)
# since the return value is expected to be split between the two.
# See http://msdn.microsoft.com/en-us/library/7572ztz4.aspx
move a1, a2
move a0, a1
subp 48, sp
move sp, a0
addp 32, a0
call function
addp 48, sp
move 8[r0], r1
move [r0], r0
elsif C_LOOP or C_LOOP_WIN
cloopCallSlowPath function, a0, a1
else
error
end
end
macro cCall2Void(function)
if C_LOOP or C_LOOP_WIN
cloopCallSlowPathVoid function, a0, a1
elsif X86_64_WIN
# Note: we cannot use the cCall2 macro for Win64 in this case,
# as the Win64 cCall2 implemenation is only correct when the return type size is > 8 bytes.
# On Win64, rcx and rdx are used for passing the first two parameters.
# We also need to make room on the stack for all four parameter registers.
# See http://msdn.microsoft.com/en-us/library/ms235286.aspx
subp 32, sp
call function
addp 32, sp
else
cCall2(function)
end
end
# This barely works. arg3 and arg4 should probably be immediates.
macro cCall4(function)
checkStackPointerAlignment(t4, 0xbad0c004)
if X86_64 or ARM64 or ARM64E
call function
elsif X86_64_WIN
# On Win64, rcx, rdx, r8, and r9 are used for passing the first four parameters.
# We also need to make room on the stack for all four parameter registers.
# See http://msdn.microsoft.com/en-us/library/ms235286.aspx
subp 64, sp
call function
addp 64, sp
else
error
end
end
macro doVMEntry(makeCall)
functionPrologue()
pushCalleeSaves()
const entry = a0
const vm = a1
const protoCallFrame = a2
vmEntryRecord(cfr, sp)
checkStackPointerAlignment(t4, 0xbad0dc01)
storep vm, VMEntryRecord::m_vm[sp]
loadp VM::topCallFrame[vm], t4
storep t4, VMEntryRecord::m_prevTopCallFrame[sp]
loadp VM::topEntryFrame[vm], t4
storep t4, VMEntryRecord::m_prevTopEntryFrame[sp]
loadp ProtoCallFrame::calleeValue[protoCallFrame], t4
storep t4, VMEntryRecord::m_callee[sp]
loadi ProtoCallFrame::paddedArgCount[protoCallFrame], t4
addp CallFrameHeaderSlots, t4, t4
lshiftp 3, t4
subp sp, t4, t3
bqbeq sp, t3, .throwStackOverflow
# Ensure that we have enough additional stack capacity for the incoming args,
# and the frame for the JS code we're executing. We need to do this check
# before we start copying the args from the protoCallFrame below.
if C_LOOP or C_LOOP_WIN
bpaeq t3, VM::m_cloopStackLimit[vm], .stackHeightOK
move entry, t4
move vm, t5
cloopCallSlowPath _llint_stack_check_at_vm_entry, vm, t3
bpeq t0, 0, .stackCheckFailed
move t4, entry
move t5, vm
jmp .stackHeightOK
.stackCheckFailed:
move t4, entry
move t5, vm
jmp .throwStackOverflow
else
bpb t3, VM::m_softStackLimit[vm], .throwStackOverflow
end
.stackHeightOK:
move t3, sp
move (constexpr ProtoCallFrame::numberOfRegisters), t3
.copyHeaderLoop:
# Copy the CodeBlock/Callee/ArgumentCountIncludingThis/|this| from protoCallFrame into the callee frame.
subi 1, t3
loadq [protoCallFrame, t3, 8], extraTempReg
storeq extraTempReg, CodeBlock[sp, t3, 8]
btinz t3, .copyHeaderLoop
loadi PayloadOffset + ProtoCallFrame::argCountAndCodeOriginValue[protoCallFrame], t4
subi 1, t4
loadi ProtoCallFrame::paddedArgCount[protoCallFrame], extraTempReg
subi 1, extraTempReg
bieq t4, extraTempReg, .copyArgs
move ValueUndefined, t3
.fillExtraArgsLoop:
subi 1, extraTempReg
storeq t3, ThisArgumentOffset + 8[sp, extraTempReg, 8]
bineq t4, extraTempReg, .fillExtraArgsLoop
.copyArgs:
loadp ProtoCallFrame::args[protoCallFrame], t3
.copyArgsLoop:
btiz t4, .copyArgsDone
subi 1, t4
loadq [t3, t4, 8], extraTempReg
storeq extraTempReg, ThisArgumentOffset + 8[sp, t4, 8]
jmp .copyArgsLoop
.copyArgsDone:
if ARM64 or ARM64E
move sp, t4
storep t4, VM::topCallFrame[vm]
else
storep sp, VM::topCallFrame[vm]
end
storep cfr, VM::topEntryFrame[vm]
checkStackPointerAlignment(extraTempReg, 0xbad0dc02)
makeCall(entry, protoCallFrame, t3, t4)
# We may have just made a call into a JS function, so we can't rely on sp
# for anything but the fact that our own locals (ie the VMEntryRecord) are
# not below it. It also still has to be aligned, though.
checkStackPointerAlignment(t2, 0xbad0dc03)
vmEntryRecord(cfr, t4)
loadp VMEntryRecord::m_vm[t4], vm
loadp VMEntryRecord::m_prevTopCallFrame[t4], t2
storep t2, VM::topCallFrame[vm]
loadp VMEntryRecord::m_prevTopEntryFrame[t4], t2
storep t2, VM::topEntryFrame[vm]
subp cfr, CalleeRegisterSaveSize, sp
popCalleeSaves()
functionEpilogue()
ret
.throwStackOverflow:
move vm, a0
move protoCallFrame, a1
cCall2(_llint_throw_stack_overflow_error)
vmEntryRecord(cfr, t4)
loadp VMEntryRecord::m_vm[t4], vm
loadp VMEntryRecord::m_prevTopCallFrame[t4], extraTempReg
storep extraTempReg, VM::topCallFrame[vm]
loadp VMEntryRecord::m_prevTopEntryFrame[t4], extraTempReg
storep extraTempReg, VM::topEntryFrame[vm]
subp cfr, CalleeRegisterSaveSize, sp
popCalleeSaves()
functionEpilogue()
ret
end
# a0, a2, t3, t4
macro makeJavaScriptCall(entry, protoCallFrame, temp1, temp2)
addp 16, sp
if C_LOOP or C_LOOP_WIN
cloopCallJSFunction entry
else
call entry, JSEntryPtrTag
end
subp 16, sp
end
# a0, a2, t3, t4
macro makeHostFunctionCall(entry, protoCallFrame, temp1, temp2)
move entry, temp1
storep cfr, [sp]
loadp ProtoCallFrame::globalObject[protoCallFrame], a0
move sp, a1
if C_LOOP or C_LOOP_WIN
storep lr, 8[sp]
cloopCallNative temp1
elsif X86_64_WIN
# We need to allocate 32 bytes on the stack for the shadow space.
subp 32, sp
call temp1, JSEntryPtrTag
addp 32, sp
else
call temp1, JSEntryPtrTag
end
end
op(handleUncaughtException, macro ()
loadp Callee[cfr], t3
convertCalleeToVM(t3)
restoreCalleeSavesFromVMEntryFrameCalleeSavesBuffer(t3, t0)
storep 0, VM::callFrameForCatch[t3]
loadp VM::topEntryFrame[t3], cfr
vmEntryRecord(cfr, t2)
loadp VMEntryRecord::m_vm[t2], t3
loadp VMEntryRecord::m_prevTopCallFrame[t2], extraTempReg
storep extraTempReg, VM::topCallFrame[t3]
loadp VMEntryRecord::m_prevTopEntryFrame[t2], extraTempReg
storep extraTempReg, VM::topEntryFrame[t3]
subp cfr, CalleeRegisterSaveSize, sp
popCalleeSaves()
functionEpilogue()
ret
end)
macro prepareStateForCCall()
addp PB, PC
end
macro restoreStateAfterCCall()
move r0, PC
subp PB, PC
end
macro callSlowPath(slowPath)
prepareStateForCCall()
move cfr, a0
move PC, a1
cCall2(slowPath)
restoreStateAfterCCall()
end
macro traceOperand(fromWhere, operand)
prepareStateForCCall()
move fromWhere, a2
move operand, a3
move cfr, a0
move PC, a1
cCall4(_llint_trace_operand)
restoreStateAfterCCall()
end
macro traceValue(fromWhere, operand)
prepareStateForCCall()
move fromWhere, a2
move operand, a3
move cfr, a0
move PC, a1
cCall4(_llint_trace_value)
restoreStateAfterCCall()
end
# Call a slow path for call opcodes.
macro callCallSlowPath(slowPath, action)
storePC()
prepareStateForCCall()
move cfr, a0
move PC, a1
cCall2(slowPath)
action(r0, r1)
end
macro callTrapHandler(throwHandler)
storePC()
prepareStateForCCall()
move cfr, a0
move PC, a1
cCall2(_llint_slow_path_handle_traps)
btpnz r0, throwHandler
loadi LLIntReturnPC[cfr], PC
end
macro checkSwitchToJITForLoop()
checkSwitchToJIT(
1,
macro()
storePC()
prepareStateForCCall()
move cfr, a0
move PC, a1
cCall2(_llint_loop_osr)
btpz r0, .recover
move r1, sp
jmp r0, JSEntryPtrTag
.recover:
loadPC()
end)
end
macro cage(basePtr, mask, ptr, scratch)
if GIGACAGE_ENABLED and not (C_LOOP or C_LOOP_WIN)
loadp basePtr, scratch
btpz scratch, .done
andp mask, ptr
addp scratch, ptr
.done:
end
end
macro cagedPrimitive(ptr, length, scratch, scratch2)
if ARM64E
const source = scratch2
move ptr, scratch2
else
const source = ptr
end
if GIGACAGE_ENABLED
cage(_g_gigacageConfig + Gigacage::Config::basePtrs + GigacagePrimitiveBasePtrOffset, constexpr Gigacage::primitiveGigacageMask, source, scratch)
if ARM64E
const numberOfPACBits = constexpr MacroAssembler::numberOfPACBits
bfiq scratch2, 0, 64 - numberOfPACBits, ptr
end
end
if ARM64E
untagArrayPtr length, ptr
end
end
macro loadCagedJSValue(source, dest, scratchOrLength)
loadp source, dest
if GIGACAGE_ENABLED
cage(_g_gigacageConfig + Gigacage::Config::basePtrs + GigacageJSValueBasePtrOffset, constexpr Gigacage::jsValueGigacageMask, dest, scratchOrLength)
end
end
macro loadVariable(get, fieldName, valueReg)
get(fieldName, valueReg)
loadq [cfr, valueReg, 8], valueReg
end
# Index and value must be different registers. Index may be clobbered.
macro loadConstant(size, index, value)
macro loadNarrow()
loadp CodeBlock[cfr], value
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[value], value
loadq -(FirstConstantRegisterIndexNarrow * 8)[value, index, 8], value
end
macro loadWide16()
loadp CodeBlock[cfr], value
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[value], value
loadq -(FirstConstantRegisterIndexWide16 * 8)[value, index, 8], value
end
macro loadWide32()
loadp CodeBlock[cfr], value
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[value], value
subp FirstConstantRegisterIndexWide32, index
loadq [value, index, 8], value
end
size(loadNarrow, loadWide16, loadWide32, macro (load) load() end)
end
# Index and value must be different registers. Index may be clobbered.
macro loadConstantOrVariable(size, index, value)
macro loadNarrow()
bpgteq index, FirstConstantRegisterIndexNarrow, .constant
loadq [cfr, index, 8], value
jmp .done
.constant:
loadConstant(size, index, value)
.done:
end
macro loadWide16()
bpgteq index, FirstConstantRegisterIndexWide16, .constant
loadq [cfr, index, 8], value
jmp .done
.constant:
loadConstant(size, index, value)
.done:
end
macro loadWide32()
bpgteq index, FirstConstantRegisterIndexWide32, .constant
loadq [cfr, index, 8], value
jmp .done
.constant:
loadConstant(size, index, value)
.done:
end
size(loadNarrow, loadWide16, loadWide32, macro (load) load() end)
end
macro loadConstantOrVariableInt32(size, index, value, slow)
loadConstantOrVariable(size, index, value)
bqb value, numberTag, slow
end
macro loadConstantOrVariableCell(size, index, value, slow)
loadConstantOrVariable(size, index, value)
btqnz value, notCellMask, slow
end
macro writeBarrierOnCellWithReload(cell, reloadAfterSlowPath)
skipIfIsRememberedOrInEden(
cell,
macro()
push PB, PC
move cell, a1 # cell can be a0
move cfr, a0
cCall2Void(_llint_write_barrier_slow)
pop PC, PB
reloadAfterSlowPath()
end)
end
macro writeBarrierOnCellAndValueWithReload(cell, value, reloadAfterSlowPath)
btqnz value, notCellMask, .writeBarrierDone
btqz value, .writeBarrierDone
writeBarrierOnCellWithReload(cell, reloadAfterSlowPath)
.writeBarrierDone:
end
macro writeBarrierOnOperandWithReload(size, get, cellFieldName, reloadAfterSlowPath)
get(cellFieldName, t1)
loadConstantOrVariableCell(size, t1, t2, .writeBarrierDone)
writeBarrierOnCellWithReload(t2, reloadAfterSlowPath)
.writeBarrierDone:
end
macro writeBarrierOnOperand(size, get, cellFieldName)
writeBarrierOnOperandWithReload(size, get, cellFieldName, macro () end)
end
macro writeBarrierOnOperands(size, get, cellFieldName, valueFieldName)
get(valueFieldName, t1)
loadConstantOrVariableCell(size, t1, t0, .writeBarrierDone)
btpz t0, .writeBarrierDone
writeBarrierOnOperand(size, get, cellFieldName)
.writeBarrierDone:
end
macro writeBarrierOnGlobal(size, get, valueFieldName, loadMacro)
get(valueFieldName, t1)
loadConstantOrVariableCell(size, t1, t0, .writeBarrierDone)
btpz t0, .writeBarrierDone
loadMacro(t3)
writeBarrierOnCellWithReload(t3, macro() end)
.writeBarrierDone:
end
macro writeBarrierOnGlobalObject(size, get, valueFieldName)
writeBarrierOnGlobal(size, get, valueFieldName,
macro(registerToStoreGlobal)
loadp CodeBlock[cfr], registerToStoreGlobal
loadp CodeBlock::m_globalObject[registerToStoreGlobal], registerToStoreGlobal
end)
end
macro writeBarrierOnGlobalLexicalEnvironment(size, get, valueFieldName)
writeBarrierOnGlobal(size, get, valueFieldName,
macro(registerToStoreGlobal)
loadp CodeBlock[cfr], registerToStoreGlobal
loadp CodeBlock::m_globalObject[registerToStoreGlobal], registerToStoreGlobal
loadp JSGlobalObject::m_globalLexicalEnvironment[registerToStoreGlobal], registerToStoreGlobal
end)
end
macro structureIDToStructureWithScratch(structureIDThenStructure, scratch, scratch2)
loadp CodeBlock[cfr], scratch
move structureIDThenStructure, scratch2
loadp CodeBlock::m_vm[scratch], scratch
rshifti NumberOfStructureIDEntropyBits, scratch2
loadp VM::heap + Heap::m_structureIDTable + StructureIDTable::m_table[scratch], scratch
loadp [scratch, scratch2, PtrSize], scratch2
lshiftp StructureEntropyBitsShift, structureIDThenStructure
xorp scratch2, structureIDThenStructure
end
macro loadStructureWithScratch(cell, structure, scratch, scratch2)
loadi JSCell::m_structureID[cell], structure
structureIDToStructureWithScratch(structure, scratch, scratch2)
end
# Entrypoints into the interpreter.
# Expects that CodeBlock is in t1, which is what prologue() leaves behind.
macro functionArityCheck(doneLabel, slowPath)
loadi PayloadOffset + ArgumentCountIncludingThis[cfr], t0
biaeq t0, CodeBlock::m_numParameters[t1], doneLabel
prepareStateForCCall()
move cfr, a0
move PC, a1
cCall2(slowPath) # This slowPath has the protocol: r0 = 0 => no error, r0 != 0 => error
btiz r0, .noError
# We're throwing before the frame is fully set up. This frame will be
# ignored by the unwinder. So, let's restore the callee saves before we
# start unwinding. We need to do this before we change the cfr.
restoreCalleeSavesUsedByLLInt()
move r1, cfr # r1 contains caller frame
jmp _llint_throw_from_slow_path_trampoline
.noError:
move r1, t1 # r1 contains slotsToAdd.
btiz t1, .continue
loadi PayloadOffset + ArgumentCountIncludingThis[cfr], t2
addi CallFrameHeaderSlots, t2
// Check if there are some unaligned slots we can use
move t1, t3
andi StackAlignmentSlots - 1, t3
btiz t3, .noExtraSlot
move ValueUndefined, t0
.fillExtraSlots:
storeq t0, [cfr, t2, 8]
addi 1, t2
bsubinz 1, t3, .fillExtraSlots
andi ~(StackAlignmentSlots - 1), t1
btiz t1, .continue
.noExtraSlot:
if ARM64E
loadp 8[cfr], lr
addp 16, cfr, t3
untagReturnAddress t3
end
// Move frame up t1 slots
negq t1
move cfr, t3
subp CalleeSaveSpaceAsVirtualRegisters * 8, t3
addi CalleeSaveSpaceAsVirtualRegisters, t2
move t1, t0
# Adds to sp are always 64-bit on arm64 so we need maintain t0's high bits.
lshiftq 3, t0
addp t0, cfr
addp t0, sp
.copyLoop:
loadq [t3], t0
storeq t0, [t3, t1, 8]
addp 8, t3
bsubinz 1, t2, .copyLoop
// Fill new slots with JSUndefined
move t1, t2
move ValueUndefined, t0
.fillLoop:
storeq t0, [t3, t1, 8]
addp 8, t3
baddinz 1, t2, .fillLoop
if ARM64E
addp 16, cfr, t1
tagReturnAddress t1
storep lr, 8[cfr]
end
.continue:
# Reload CodeBlock and reset PC, since the slow_path clobbered them.
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_instructionsRawPointer[t1], PB
move 0, PC
jmp doneLabel
end
# Instruction implementations
_llint_op_enter:
traceExecution()
checkStackPointerAlignment(t2, 0xdead00e1)
loadp CodeBlock[cfr], t2 // t2<CodeBlock> = cfr.CodeBlock
loadi CodeBlock::m_numVars[t2], t2 // t2<size_t> = t2<CodeBlock>.m_numVars
subq CalleeSaveSpaceAsVirtualRegisters, t2
move cfr, t1
subq CalleeSaveSpaceAsVirtualRegisters * 8, t1
btiz t2, .opEnterDone
move ValueUndefined, t0
negi t2
sxi2q t2, t2
.opEnterLoop:
storeq t0, [t1, t2, 8]
addq 1, t2
btqnz t2, .opEnterLoop
.opEnterDone:
callSlowPath(_slow_path_enter)
dispatchOp(narrow, op_enter)
llintOpWithProfile(op_get_argument, OpGetArgument, macro (size, get, dispatch, return)
get(m_index, t2)
loadi PayloadOffset + ArgumentCountIncludingThis[cfr], t0
bilteq t0, t2, .opGetArgumentOutOfBounds
loadq ThisArgumentOffset[cfr, t2, 8], t0
return(t0)
.opGetArgumentOutOfBounds:
return(ValueUndefined)
end)
llintOpWithReturn(op_argument_count, OpArgumentCount, macro (size, get, dispatch, return)
loadi PayloadOffset + ArgumentCountIncludingThis[cfr], t0
subi 1, t0
orq TagNumber, t0
return(t0)
end)
llintOpWithReturn(op_get_scope, OpGetScope, macro (size, get, dispatch, return)
loadp Callee[cfr], t0
loadp JSCallee::m_scope[t0], t0
return(t0)
end)
llintOpWithMetadata(op_to_this, OpToThis, macro (size, get, dispatch, metadata, return)
get(m_srcDst, t0)
loadq [cfr, t0, 8], t0
btqnz t0, notCellMask, .opToThisSlow
bbneq JSCell::m_type[t0], FinalObjectType, .opToThisSlow
loadi JSCell::m_structureID[t0], t1
metadata(t2, t3)
loadi OpToThis::Metadata::m_cachedStructureID[t2], t2
bineq t1, t2, .opToThisSlow
dispatch()
.opToThisSlow:
callSlowPath(_slow_path_to_this)
dispatch()
end)
llintOp(op_check_tdz, OpCheckTdz, macro (size, get, dispatch)
get(m_targetVirtualRegister, t0)
loadConstantOrVariable(size, t0, t1)
bqneq t1, ValueEmpty, .opNotTDZ
callSlowPath(_slow_path_throw_tdz_error)
.opNotTDZ:
dispatch()
end)
llintOpWithReturn(op_mov, OpMov, macro (size, get, dispatch, return)
get(m_src, t1)
loadConstantOrVariable(size, t1, t2)
return(t2)
end)
llintOpWithReturn(op_not, OpNot, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2)
xorq ValueFalse, t2
btqnz t2, ~1, .opNotSlow
xorq ValueTrue, t2
return(t2)
.opNotSlow:
callSlowPath(_slow_path_not)
dispatch()
end)
macro equalityComparisonOp(opcodeName, opcodeStruct, integerComparison)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t0)
get(m_lhs, t2)
loadConstantOrVariableInt32(size, t0, t1, .slow)
loadConstantOrVariableInt32(size, t2, t0, .slow)
integerComparison(t0, t1, t0)
orq ValueFalse, t0
return(t0)
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
macro equalNullComparisonOp(opcodeName, opcodeStruct, fn)
llintOpWithReturn(opcodeName, opcodeStruct, macro (size, get, dispatch, return)
get(m_operand, t0)
loadq [cfr, t0, 8], t0
btqnz t0, notCellMask, .immediate
btbnz JSCell::m_flags[t0], MasqueradesAsUndefined, .masqueradesAsUndefined
move 0, t0
jmp .done
.masqueradesAsUndefined:
loadStructureWithScratch(t0, t2, t1, t3)
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
cpeq Structure::m_globalObject[t2], t0, t0
jmp .done
.immediate:
andq ~TagUndefined, t0
cqeq t0, ValueNull, t0
.done:
fn(t0)
return(t0)
end)
end
equalNullComparisonOp(op_eq_null, OpEqNull,
macro (value) orq ValueFalse, value end)
equalNullComparisonOp(op_neq_null, OpNeqNull,
macro (value) xorq ValueTrue, value end)
llintOpWithReturn(op_is_undefined_or_null, OpIsUndefinedOrNull, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
andq ~TagUndefined, t0
cqeq t0, ValueNull, t0
orq ValueFalse, t0
return(t0)
end)
macro strictEqOp(opcodeName, opcodeStruct, equalityOperation)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t0)
get(m_lhs, t2)
loadConstantOrVariable(size, t0, t1)
loadConstantOrVariable(size, t2, t0)
move t0, t2
orq t1, t2
btqz t2, notCellMask, .slow
bqaeq t0, numberTag, .leftOK
btqnz t0, numberTag, .slow
.leftOK:
bqaeq t1, numberTag, .rightOK
btqnz t1, numberTag, .slow
.rightOK:
equalityOperation(t0, t1, t0)
orq ValueFalse, t0
return(t0)
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
strictEqOp(stricteq, OpStricteq,
macro (left, right, result) cqeq left, right, result end)
strictEqOp(nstricteq, OpNstricteq,
macro (left, right, result) cqneq left, right, result end)
macro strictEqualityJumpOp(opcodeName, opcodeStruct, equalityOperation)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_lhs, t2)
get(m_rhs, t3)
loadConstantOrVariable(size, t2, t0)
loadConstantOrVariable(size, t3, t1)
move t0, t2
orq t1, t2
btqz t2, notCellMask, .slow
bqaeq t0, numberTag, .leftOK
btqnz t0, numberTag, .slow
.leftOK:
bqaeq t1, numberTag, .rightOK
btqnz t1, numberTag, .slow
.rightOK:
equalityOperation(t0, t1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
strictEqualityJumpOp(jstricteq, OpJstricteq,
macro (left, right, target) bqeq left, right, target end)
strictEqualityJumpOp(jnstricteq, OpJnstricteq,
macro (left, right, target) bqneq left, right, target end)
macro preOp(opcodeName, opcodeStruct, integerOperation)
llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
macro updateArithProfile(type)
orh type, %opcodeStruct%::Metadata::m_arithProfile + UnaryArithProfile::m_bits[t1]
end
get(m_srcDst, t0)
loadq [cfr, t0, 8], t3
metadata(t1, t2)
# Metadata in t1, srcDst in t3
bqb t3, numberTag, .slow
integerOperation(t3, .slow)
orq numberTag, t3
storeq t3, [cfr, t0, 8]
updateArithProfile(ArithProfileInt)
dispatch()
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
llintOpWithProfile(op_to_number, OpToNumber, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2)
bqaeq t2, numberTag, .opToNumberIsImmediate
btqz t2, numberTag, .opToNumberSlow
.opToNumberIsImmediate:
return(t2)
.opToNumberSlow:
callSlowPath(_slow_path_to_number)
dispatch()
end)
llintOpWithProfile(op_to_numeric, OpToNumeric, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2)
bqaeq t2, numberTag, .opToNumericIsImmediate
btqz t2, numberTag, .opToNumericSlow
.opToNumericIsImmediate:
return(t2)
.opToNumericSlow:
callSlowPath(_slow_path_to_numeric)
dispatch()
end)
llintOpWithReturn(op_to_string, OpToString, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
btqnz t0, notCellMask, .opToStringSlow
bbneq JSCell::m_type[t0], StringType, .opToStringSlow
.opToStringIsString:
return(t0)
.opToStringSlow:
callSlowPath(_slow_path_to_string)
dispatch()
end)
llintOpWithProfile(op_to_object, OpToObject, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2)
btqnz t2, notCellMask, .opToObjectSlow
bbb JSCell::m_type[t2], ObjectType, .opToObjectSlow
return(t2)
.opToObjectSlow:
callSlowPath(_slow_path_to_object)
dispatch()
end)
llintOpWithMetadata(op_negate, OpNegate, macro (size, get, dispatch, metadata, return)
macro updateArithProfile(type)
orh type, OpNegate::Metadata::m_arithProfile + UnaryArithProfile::m_bits[t1]
end
get(m_operand, t0)
loadConstantOrVariable(size, t0, t3)
metadata(t1, t2)
bqb t3, numberTag, .opNegateNotInt
btiz t3, 0x7fffffff, .opNegateSlow
negi t3
orq numberTag, t3
updateArithProfile(ArithProfileInt)
return(t3)
.opNegateNotInt:
btqz t3, numberTag, .opNegateSlow
xorq 0x8000000000000000, t3
updateArithProfile(ArithProfileNumber)
return(t3)
.opNegateSlow:
callSlowPath(_slow_path_negate)
dispatch()
end)
macro binaryOpCustomStore(opcodeName, opcodeStruct, integerOperationAndStore, doubleOperation)
llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
macro profile(type)
orh type, %opcodeStruct%::Metadata::m_arithProfile + BinaryArithProfile::m_bits[t5]
end
get(m_rhs, t0)
get(m_lhs, t2)
loadConstantOrVariable(size, t0, t1)
loadConstantOrVariable(size, t2, t0)
bqb t0, numberTag, .op1NotInt
bqb t1, numberTag, .op2NotInt
get(m_dst, t2)
integerOperationAndStore(t1, t0, .slow, t2)
profile(ArithProfileIntInt)
dispatch()
.op1NotInt:
# First operand is definitely not an int, the second operand could be anything.
btqz t0, numberTag, .slow
bqaeq t1, numberTag, .op1NotIntOp2Int
btqz t1, numberTag, .slow
addq numberTag, t1
fq2d t1, ft1
profile(ArithProfileNumberNumber)
jmp .op1NotIntReady
.op1NotIntOp2Int:
profile(ArithProfileNumberInt)
ci2ds t1, ft1
.op1NotIntReady:
get(m_dst, t2)
addq numberTag, t0
fq2d t0, ft0
doubleOperation(ft1, ft0)
fd2q ft0, t0
subq numberTag, t0
storeq t0, [cfr, t2, 8]
dispatch()
.op2NotInt:
# First operand is definitely an int, the second is definitely not.
get(m_dst, t2)
btqz t1, numberTag, .slow
profile(ArithProfileIntNumber)
ci2ds t0, ft0
addq numberTag, t1
fq2d t1, ft1
doubleOperation(ft1, ft0)
fd2q ft0, t0
subq numberTag, t0
storeq t0, [cfr, t2, 8]
dispatch()
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
if X86_64 or X86_64_WIN
binaryOpCustomStore(div, OpDiv,
macro (left, right, slow, index)
# Assume t3 is scratchable.
btiz left, slow
bineq left, -1, .notNeg2TwoThe31DivByNeg1
bieq right, -2147483648, .slow
.notNeg2TwoThe31DivByNeg1:
btinz right, .intOK
bilt left, 0, slow
.intOK:
move left, t3
move right, t0
cdqi
idivi t3
btinz t1, slow
orq numberTag, t0
storeq t0, [cfr, index, 8]
end,
macro (left, right) divd left, right end)
else
slowPathOp(div)
end
binaryOpCustomStore(mul, OpMul,
macro (left, right, slow, index)
# Assume t3 is scratchable.
move right, t3
bmulio left, t3, slow
btinz t3, .done
bilt left, 0, slow
bilt right, 0, slow
.done:
orq numberTag, t3
storeq t3, [cfr, index, 8]
end,
macro (left, right) muld left, right end)
macro binaryOp(opcodeName, opcodeStruct, integerOperation, doubleOperation)
binaryOpCustomStore(opcodeName, opcodeStruct,
macro (left, right, slow, index)
integerOperation(left, right, slow)
orq numberTag, right
storeq right, [cfr, index, 8]
end,
doubleOperation)
end
binaryOp(add, OpAdd,
macro (left, right, slow) baddio left, right, slow end,
macro (left, right) addd left, right end)
binaryOp(sub, OpSub,
macro (left, right, slow) bsubio left, right, slow end,
macro (left, right) subd left, right end)
llintOpWithReturn(op_unsigned, OpUnsigned, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t2)
bilt t2, 0, .opUnsignedSlow
return(t2)
.opUnsignedSlow:
callSlowPath(_slow_path_unsigned)
dispatch()
end)
macro commonBitOp(opKind, opcodeName, opcodeStruct, operation)
opKind(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t0)
get(m_lhs, t2)
loadConstantOrVariable(size, t0, t1)
loadConstantOrVariable(size, t2, t0)
bqb t0, numberTag, .slow
bqb t1, numberTag, .slow
operation(t1, t0)
orq numberTag, t0
return(t0)
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
macro bitOp(opcodeName, opcodeStruct, operation)
commonBitOp(llintOpWithReturn, opcodeName, opcodeStruct, operation)
end
macro bitOpProfiled(opcodeName, opcodeStruct, operation)
commonBitOp(llintOpWithProfile, opcodeName, opcodeStruct, operation)
end
bitOpProfiled(lshift, OpLshift,
macro (left, right) lshifti left, right end)
bitOpProfiled(rshift, OpRshift,
macro (left, right) rshifti left, right end)
bitOp(urshift, OpUrshift,
macro (left, right) urshifti left, right end)
bitOpProfiled(bitand, OpBitand,
macro (left, right) andi left, right end)
bitOpProfiled(bitor, OpBitor,
macro (left, right) ori left, right end)
bitOpProfiled(bitxor, OpBitxor,
macro (left, right) xori left, right end)
llintOpWithProfile(op_bitnot, OpBitnot, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariableInt32(size, t0, t3, .opBitNotSlow)
noti t3
orq numberTag, t3
return(t3)
.opBitNotSlow:
callSlowPath(_slow_path_bitnot)
dispatch()
end)
llintOp(op_overrides_has_instance, OpOverridesHasInstance, macro (size, get, dispatch)
get(m_dst, t3)
get(m_hasInstanceValue, t1)
loadConstantOrVariable(size, t1, t0)
loadp CodeBlock[cfr], t2
loadp CodeBlock::m_globalObject[t2], t2
loadp JSGlobalObject::m_functionProtoHasInstanceSymbolFunction[t2], t2
bqneq t0, t2, .opOverridesHasInstanceNotDefaultSymbol
get(m_constructor, t1)
loadConstantOrVariable(size, t1, t0)
tbz JSCell::m_flags[t0], ImplementsDefaultHasInstance, t1
orq ValueFalse, t1
storeq t1, [cfr, t3, 8]
dispatch()
.opOverridesHasInstanceNotDefaultSymbol:
storeq ValueTrue, [cfr, t3, 8]
dispatch()
end)
llintOpWithReturn(op_is_empty, OpIsEmpty, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
cqeq t0, ValueEmpty, t3
orq ValueFalse, t3
return(t3)
end)
llintOpWithReturn(op_is_undefined, OpIsUndefined, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
btqz t0, notCellMask, .opIsUndefinedCell
cqeq t0, ValueUndefined, t3
orq ValueFalse, t3
return(t3)
.opIsUndefinedCell:
btbnz JSCell::m_flags[t0], MasqueradesAsUndefined, .masqueradesAsUndefined
move ValueFalse, t1
return(t1)
.masqueradesAsUndefined:
loadStructureWithScratch(t0, t3, t1, t2)
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_globalObject[t1], t1
cpeq Structure::m_globalObject[t3], t1, t0
orq ValueFalse, t0
return(t0)
end)
llintOpWithReturn(op_is_boolean, OpIsBoolean, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
xorq ValueFalse, t0
tqz t0, ~1, t0
orq ValueFalse, t0
return(t0)
end)
llintOpWithReturn(op_is_number, OpIsNumber, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
tqnz t0, numberTag, t1
orq ValueFalse, t1
return(t1)
end)
llintOpWithReturn(op_is_cell_with_type, OpIsCellWithType, macro (size, get, dispatch, return)
getu(size, OpIsCellWithType, m_type, t0)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t3)
btqnz t3, notCellMask, .notCellCase
cbeq JSCell::m_type[t3], t0, t1
orq ValueFalse, t1
return(t1)
.notCellCase:
return(ValueFalse)
end)
llintOpWithReturn(op_is_object, OpIsObject, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0)
btqnz t0, notCellMask, .opIsObjectNotCell
cbaeq JSCell::m_type[t0], ObjectType, t1
orq ValueFalse, t1
return(t1)
.opIsObjectNotCell:
return(ValueFalse)
end)
macro loadPropertyAtVariableOffset(propertyOffsetAsInt, objectAndStorage, value)
bilt propertyOffsetAsInt, firstOutOfLineOffset, .isInline
loadp JSObject::m_butterfly[objectAndStorage], objectAndStorage
negi propertyOffsetAsInt
sxi2q propertyOffsetAsInt, propertyOffsetAsInt
jmp .ready
.isInline:
addp sizeof JSObject - (firstOutOfLineOffset - 2) * 8, objectAndStorage
.ready:
loadq (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffsetAsInt, 8], value
end
macro storePropertyAtVariableOffset(propertyOffsetAsInt, objectAndStorage, value)
bilt propertyOffsetAsInt, firstOutOfLineOffset, .isInline
loadp JSObject::m_butterfly[objectAndStorage], objectAndStorage
negi propertyOffsetAsInt
sxi2q propertyOffsetAsInt, propertyOffsetAsInt
jmp .ready
.isInline:
addp sizeof JSObject - (firstOutOfLineOffset - 2) * 8, objectAndStorage
.ready:
storeq value, (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffsetAsInt, 8]
end
llintOpWithMetadata(op_get_by_id_direct, OpGetByIdDirect, macro (size, get, dispatch, metadata, return)
metadata(t2, t0)
get(m_base, t0)
loadConstantOrVariableCell(size, t0, t3, .opGetByIdDirectSlow)
loadi JSCell::m_structureID[t3], t1
loadi OpGetByIdDirect::Metadata::m_structureID[t2], t0
bineq t0, t1, .opGetByIdDirectSlow
loadi OpGetByIdDirect::Metadata::m_offset[t2], t1
loadPropertyAtVariableOffset(t1, t3, t0)
valueProfile(OpGetByIdDirect, t2, t0)
return(t0)
.opGetByIdDirectSlow:
callSlowPath(_llint_slow_path_get_by_id_direct)
dispatch()
end)
llintOpWithMetadata(op_get_by_id, OpGetById, macro (size, get, dispatch, metadata, return)
metadata(t2, t1)
loadb OpGetById::Metadata::m_modeMetadata.mode[t2], t1
get(m_base, t0)
loadConstantOrVariableCell(size, t0, t3, .opGetByIdSlow)
.opGetByIdDefault:
bbneq t1, constexpr GetByIdMode::Default, .opGetByIdProtoLoad
loadi JSCell::m_structureID[t3], t1
loadi OpGetById::Metadata::m_modeMetadata.defaultMode.structureID[t2], t0
bineq t0, t1, .opGetByIdSlow
loadis OpGetById::Metadata::m_modeMetadata.defaultMode.cachedOffset[t2], t1
loadPropertyAtVariableOffset(t1, t3, t0)
valueProfile(OpGetById, t2, t0)
return(t0)
.opGetByIdProtoLoad:
bbneq t1, constexpr GetByIdMode::ProtoLoad, .opGetByIdArrayLength
loadi JSCell::m_structureID[t3], t1
loadi OpGetById::Metadata::m_modeMetadata.protoLoadMode.structureID[t2], t3
bineq t3, t1, .opGetByIdSlow
loadis OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedOffset[t2], t1
loadp OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedSlot[t2], t3
loadPropertyAtVariableOffset(t1, t3, t0)
valueProfile(OpGetById, t2, t0)
return(t0)
.opGetByIdArrayLength:
bbneq t1, constexpr GetByIdMode::ArrayLength, .opGetByIdUnset
move t3, t0
arrayProfile(OpGetById::Metadata::m_modeMetadata.arrayLengthMode.arrayProfile, t0, t2, t5)
btiz t0, IsArray, .opGetByIdSlow
btiz t0, IndexingShapeMask, .opGetByIdSlow
loadCagedJSValue(JSObject::m_butterfly[t3], t0, t1)
loadi -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], t0
bilt t0, 0, .opGetByIdSlow
orq numberTag, t0
valueProfile(OpGetById, t2, t0)
return(t0)
.opGetByIdUnset:
loadi JSCell::m_structureID[t3], t1
loadi OpGetById::Metadata::m_modeMetadata.unsetMode.structureID[t2], t0
bineq t0, t1, .opGetByIdSlow
valueProfile(OpGetById, t2, ValueUndefined)
return(ValueUndefined)
.opGetByIdSlow:
callSlowPath(_llint_slow_path_get_by_id)
dispatch()
.osrReturnPoint:
getterSetterOSRExitReturnPoint(op_get_by_id, size)
metadata(t2, t3)
valueProfile(OpGetById, t2, r0)
return(r0)
end)
llintOpWithMetadata(op_put_by_id, OpPutById, macro (size, get, dispatch, metadata, return)
get(m_base, t3)
loadConstantOrVariableCell(size, t3, t0, .opPutByIdSlow)
metadata(t5, t2)
loadi OpPutById::Metadata::m_oldStructureID[t5], t2
bineq t2, JSCell::m_structureID[t0], .opPutByIdSlow
# At this point, we have:
# t0 -> object base
# t2 -> current structure ID
# t5 -> metadata
loadi OpPutById::Metadata::m_newStructureID[t5], t1
btiz t1, .opPutByIdNotTransition
# This is the transition case. t1 holds the new structureID. t2 holds the old structure ID.
# If we have a chain, we need to check it. t0 is the base. We may clobber t1 to use it as
# scratch.
loadp OpPutById::Metadata::m_structureChain[t5], t3
btpz t3, .opPutByIdTransitionDirect
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_vm[t1], t1
loadp VM::heap + Heap::m_structureIDTable + StructureIDTable::m_table[t1], t1
macro structureIDToStructureWithScratchAndTable(structureIDThenStructure, table, scratch)
move structureIDThenStructure, scratch
rshifti NumberOfStructureIDEntropyBits, scratch
loadp [table, scratch, PtrSize], scratch
lshiftp StructureEntropyBitsShift, structureIDThenStructure
xorp scratch, structureIDThenStructure
end
structureIDToStructureWithScratchAndTable(t2, t1, t0)
loadp StructureChain::m_vector[t3], t3
assert(macro (ok) btpnz t3, ok end)
loadq Structure::m_prototype[t2], t2
bqeq t2, ValueNull, .opPutByIdTransitionChainDone
.opPutByIdTransitionChainLoop:
loadi JSCell::m_structureID[t2], t2
bineq t2, [t3], .opPutByIdSlow
addp 4, t3
structureIDToStructureWithScratchAndTable(t2, t1, t0)
loadq Structure::m_prototype[t2], t2
bqneq t2, ValueNull, .opPutByIdTransitionChainLoop
.opPutByIdTransitionChainDone:
# Reload the new structure, since we clobbered it above.
loadi OpPutById::Metadata::m_newStructureID[t5], t1
# Reload base into t0
get(m_base, t3)
loadConstantOrVariable(size, t3, t0)
.opPutByIdTransitionDirect:
storei t1, JSCell::m_structureID[t0]
writeBarrierOnOperandWithReload(size, get, m_base, macro ()
# Reload metadata into t5
metadata(t5, t1)
# Reload base into t0
get(m_base, t1)
loadConstantOrVariable(size, t1, t0)
end)
.opPutByIdNotTransition:
# The only thing live right now is t0, which holds the base.
get(m_value, t1)
loadConstantOrVariable(size, t1, t2)
loadi OpPutById::Metadata::m_offset[t5], t1
storePropertyAtVariableOffset(t1, t0, t2)
writeBarrierOnOperands(size, get, m_base, m_value)
dispatch()
.opPutByIdSlow:
callSlowPath(_llint_slow_path_put_by_id)
dispatch()
.osrReturnPoint:
getterSetterOSRExitReturnPoint(op_put_by_id, size)
dispatch()
end)
llintOpWithMetadata(op_get_by_val, OpGetByVal, macro (size, get, dispatch, metadata, return)
macro finishGetByVal(result, scratch)
get(m_dst, scratch)
storeq result, [cfr, scratch, 8]
valueProfile(OpGetByVal, t5, result)
dispatch()
end
macro finishIntGetByVal(result, scratch)
orq numberTag, result
finishGetByVal(result, scratch)
end
macro finishDoubleGetByVal(result, scratch1, scratch2)
fd2q result, scratch1
subq numberTag, scratch1
finishGetByVal(scratch1, scratch2)
end
metadata(t5, t2)
get(m_base, t2)
loadConstantOrVariableCell(size, t2, t0, .opGetByValSlow)
move t0, t2
arrayProfile(OpGetByVal::Metadata::m_arrayProfile, t2, t5, t1)
get(m_property, t3)
loadConstantOrVariableInt32(size, t3, t1, .opGetByValSlow)
sxi2q t1, t1
loadCagedJSValue(JSObject::m_butterfly[t0], t3, numberTag)
move TagNumber, numberTag
andi IndexingShapeMask, t2
bieq t2, Int32Shape, .opGetByValIsContiguous
bineq t2, ContiguousShape, .opGetByValNotContiguous
.opGetByValIsContiguous:
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t3], .opGetByValSlow
get(m_dst, t0)
loadq [t3, t1, 8], t2
btqz t2, .opGetByValSlow
jmp .opGetByValDone
.opGetByValNotContiguous:
bineq t2, DoubleShape, .opGetByValNotDouble
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t3], .opGetByValSlow
get(m_dst, t0)
loadd [t3, t1, 8], ft0
bdnequn ft0, ft0, .opGetByValSlow
fd2q ft0, t2
subq numberTag, t2
jmp .opGetByValDone
.opGetByValNotDouble:
subi ArrayStorageShape, t2
bia t2, SlowPutArrayStorageShape - ArrayStorageShape, .opGetByValNotIndexedStorage
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t3], .opGetByValSlow
get(m_dst, t0)
loadq ArrayStorage::m_vector[t3, t1, 8], t2
btqz t2, .opGetByValSlow
.opGetByValDone:
storeq t2, [cfr, t0, 8]
valueProfile(OpGetByVal, t5, t2)
dispatch()
.opGetByValNotIndexedStorage:
# First lets check if we even have a typed array. This lets us do some boilerplate up front.
loadb JSCell::m_type[t0], t2
subi FirstTypedArrayType, t2
biaeq t2, NumberOfTypedArrayTypesExcludingDataView, .opGetByValSlow
# Sweet, now we know that we have a typed array. Do some basic things now.
if ARM64E
const length = t6
const scratch = t7
loadi JSArrayBufferView::m_length[t0], length
biaeq t1, length, .opGetByValSlow
else
# length and scratch are intentionally undefined on this branch because they are not used on other platforms.
biaeq t1, JSArrayBufferView::m_length[t0], .opGetByValSlow
end
loadp JSArrayBufferView::m_vector[t0], t3
cagedPrimitive(t3, length, t0, scratch)
# Now bisect through the various types:
# Int8ArrayType,
# Uint8ArrayType,
# Uint8ClampedArrayType,
# Int16ArrayType,
# Uint16ArrayType,
# Int32ArrayType,
# Uint32ArrayType,
# Float32ArrayType,
# Float64ArrayType,
bia t2, Uint16ArrayType - FirstTypedArrayType, .opGetByValAboveUint16Array
# We have one of Int8ArrayType .. Uint16ArrayType.
bia t2, Uint8ClampedArrayType - FirstTypedArrayType, .opGetByValInt16ArrayOrUint16Array
# We have one of Int8ArrayType ... Uint8ClampedArrayType
bia t2, Int8ArrayType - FirstTypedArrayType, .opGetByValUint8ArrayOrUint8ClampedArray
# We have Int8ArrayType.
loadbsi [t3, t1], t0
finishIntGetByVal(t0, t1)
.opGetByValUint8ArrayOrUint8ClampedArray:
bia t2, Uint8ArrayType - FirstTypedArrayType, .opGetByValUint8ClampedArray
# We have Uint8ArrayType.
loadb [t3, t1], t0
finishIntGetByVal(t0, t1)
.opGetByValUint8ClampedArray:
# We have Uint8ClampedArrayType.
loadb [t3, t1], t0
finishIntGetByVal(t0, t1)
.opGetByValInt16ArrayOrUint16Array:
# We have either Int16ArrayType or Uint16ClampedArrayType.
bia t2, Int16ArrayType - FirstTypedArrayType, .opGetByValUint16Array
# We have Int16ArrayType.
loadhsi [t3, t1, 2], t0
finishIntGetByVal(t0, t1)
.opGetByValUint16Array:
# We have Uint16ArrayType.
loadh [t3, t1, 2], t0
finishIntGetByVal(t0, t1)
.opGetByValAboveUint16Array:
# We have one of Int32ArrayType .. Float64ArrayType.
bia t2, Uint32ArrayType - FirstTypedArrayType, .opGetByValFloat32ArrayOrFloat64Array
# We have either Int32ArrayType or Uint32ArrayType
bia t2, Int32ArrayType - FirstTypedArrayType, .opGetByValUint32Array
# We have Int32ArrayType.
loadi [t3, t1, 4], t0
finishIntGetByVal(t0, t1)
.opGetByValUint32Array:
# We have Uint32ArrayType.
# This is the hardest part because of large unsigned values.
loadi [t3, t1, 4], t0
bilt t0, 0, .opGetByValSlow # This case is still awkward to implement in LLInt.
finishIntGetByVal(t0, t1)
.opGetByValFloat32ArrayOrFloat64Array:
# We have one of Float32ArrayType or Float64ArrayType. Sadly, we cannot handle Float32Array
# inline yet. That would require some offlineasm changes.
bieq t2, Float32ArrayType - FirstTypedArrayType, .opGetByValSlow
# We have Float64ArrayType.
loadd [t3, t1, 8], ft0
bdnequn ft0, ft0, .opGetByValSlow
finishDoubleGetByVal(ft0, t0, t1)
.opGetByValSlow:
callSlowPath(_llint_slow_path_get_by_val)
dispatch()
.osrReturnPoint:
getterSetterOSRExitReturnPoint(op_get_by_val, size)
metadata(t5, t2)
valueProfile(OpGetByVal, t5, r0)
return(r0)
end)
macro putByValOp(opcodeName, opcodeStruct, osrExitPoint)
llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
macro contiguousPutByVal(storeCallback)
biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .outOfBounds
.storeResult:
get(m_value, t2)
storeCallback(t2, t1, [t0, t3, 8])
dispatch()
.outOfBounds:
biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t0], .opPutByValOutOfBounds
storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
addi 1, t3, t2
storei t2, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0]
jmp .storeResult
end
get(m_base, t0)
loadConstantOrVariableCell(size, t0, t1, .opPutByValSlow)
move t1, t2
metadata(t5, t0)
arrayProfile(%opcodeStruct%::Metadata::m_arrayProfile, t2, t5, t0)
get(m_property, t0)
loadConstantOrVariableInt32(size, t0, t3, .opPutByValSlow)
sxi2q t3, t3
loadCagedJSValue(JSObject::m_butterfly[t1], t0, numberTag)
move TagNumber, numberTag
btinz t2, CopyOnWrite, .opPutByValSlow
andi IndexingShapeMask, t2
bineq t2, Int32Shape, .opPutByValNotInt32
contiguousPutByVal(
macro (operand, scratch, address)
loadConstantOrVariable(size, operand, scratch)
bqb scratch, numberTag, .opPutByValSlow
storeq scratch, address
writeBarrierOnOperands(size, get, m_base, m_value)
end)
.opPutByValNotInt32:
bineq t2, DoubleShape, .opPutByValNotDouble
contiguousPutByVal(
macro (operand, scratch, address)
loadConstantOrVariable(size, operand, scratch)
bqb scratch, numberTag, .notInt
ci2ds scratch, ft0
jmp .ready
.notInt:
addq numberTag, scratch
fq2d scratch, ft0
bdnequn ft0, ft0, .opPutByValSlow
.ready:
stored ft0, address
writeBarrierOnOperands(size, get, m_base, m_value)
end)
.opPutByValNotDouble:
bineq t2, ContiguousShape, .opPutByValNotContiguous
contiguousPutByVal(
macro (operand, scratch, address)
loadConstantOrVariable(size, operand, scratch)
storeq scratch, address
writeBarrierOnOperands(size, get, m_base, m_value)
end)
.opPutByValNotContiguous:
bineq t2, ArrayStorageShape, .opPutByValSlow
biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t0], .opPutByValOutOfBounds
btqz ArrayStorage::m_vector[t0, t3, 8], .opPutByValArrayStorageEmpty
.opPutByValArrayStorageStoreResult:
get(m_value, t2)
loadConstantOrVariable(size, t2, t1)
storeq t1, ArrayStorage::m_vector[t0, t3, 8]
writeBarrierOnOperands(size, get, m_base, m_value)
dispatch()
.opPutByValArrayStorageEmpty:
storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
addi 1, ArrayStorage::m_numValuesInVector[t0]
bib t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .opPutByValArrayStorageStoreResult
addi 1, t3, t1
storei t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0]
jmp .opPutByValArrayStorageStoreResult
.opPutByValOutOfBounds:
storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_outOfBounds[t5]
.opPutByValSlow:
callSlowPath(_llint_slow_path_%opcodeName%)
dispatch()
osrExitPoint(size, dispatch)
end)
end
putByValOp(put_by_val, OpPutByVal, macro (size, dispatch)
.osrReturnPoint:
getterSetterOSRExitReturnPoint(op_put_by_val, size)
dispatch()
end)
putByValOp(put_by_val_direct, OpPutByValDirect, macro (a, b) end)
macro llintJumpTrueOrFalseOp(opcodeName, opcodeStruct, conditionOp)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_condition, t1)
loadConstantOrVariable(size, t1, t0)
btqnz t0, ~0xf, .slow
conditionOp(t0, .target)
dispatch()
.target:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
macro equalNullJumpOp(opcodeName, opcodeStruct, cellHandler, immediateHandler)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_value, t0)
assertNotConstant(size, t0)
loadq [cfr, t0, 8], t0
btqnz t0, notCellMask, .immediate
loadStructureWithScratch(t0, t2, t1, t3)
cellHandler(t2, JSCell::m_flags[t0], .target)
dispatch()
.target:
jump(m_targetLabel)
.immediate:
andq ~TagUndefined, t0
immediateHandler(t0, .target)
dispatch()
end)
end
equalNullJumpOp(jeq_null, OpJeqNull,
macro (structure, value, target)
btbz value, MasqueradesAsUndefined, .notMasqueradesAsUndefined
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
bpeq Structure::m_globalObject[structure], t0, target
.notMasqueradesAsUndefined:
end,
macro (value, target) bqeq value, ValueNull, target end)
equalNullJumpOp(jneq_null, OpJneqNull,
macro (structure, value, target)
btbz value, MasqueradesAsUndefined, target
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
bpneq Structure::m_globalObject[structure], t0, target
end,
macro (value, target) bqneq value, ValueNull, target end)
macro undefinedOrNullJumpOp(opcodeName, opcodeStruct, fn)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_value, t1)
loadConstantOrVariable(size, t1, t0)
andq ~TagUndefined, t0
fn(t0, .target)
dispatch()
.target:
jump(m_targetLabel)
end)
end
undefinedOrNullJumpOp(jundefined_or_null, OpJundefinedOrNull,
macro (value, target) bqeq value, ValueNull, target end)
undefinedOrNullJumpOp(jnundefined_or_null, OpJnundefinedOrNull,
macro (value, target) bqneq value, ValueNull, target end)
llintOpWithMetadata(op_jneq_ptr, OpJneqPtr, macro (size, get, dispatch, metadata, return)
get(m_value, t0)
get(m_specialPointer, t1)
loadConstant(size, t1, t2)
bpneq t2, [cfr, t0, 8], .opJneqPtrTarget
dispatch()
.opJneqPtrTarget:
metadata(t5, t0)
storeb 1, OpJneqPtr::Metadata::m_hasJumped[t5]
get(m_targetLabel, t0)
jumpImpl(dispatchIndirect, t0)
end)
macro compareJumpOp(opcodeName, opcodeStruct, integerCompare, doubleCompare)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_lhs, t2)
get(m_rhs, t3)
loadConstantOrVariable(size, t2, t0)
loadConstantOrVariable(size, t3, t1)
bqb t0, numberTag, .op1NotInt
bqb t1, numberTag, .op2NotInt
integerCompare(t0, t1, .jumpTarget)
dispatch()
.op1NotInt:
btqz t0, numberTag, .slow
bqb t1, numberTag, .op1NotIntOp2NotInt
ci2ds t1, ft1
jmp .op1NotIntReady
.op1NotIntOp2NotInt:
btqz t1, numberTag, .slow
addq numberTag, t1
fq2d t1, ft1
.op1NotIntReady:
addq numberTag, t0
fq2d t0, ft0
doubleCompare(ft0, ft1, .jumpTarget)
dispatch()
.op2NotInt:
ci2ds t0, ft0
btqz t1, numberTag, .slow
addq numberTag, t1
fq2d t1, ft1
doubleCompare(ft0, ft1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
macro equalityJumpOp(opcodeName, opcodeStruct, integerComparison)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_lhs, t2)
get(m_rhs, t3)
loadConstantOrVariableInt32(size, t2, t0, .slow)
loadConstantOrVariableInt32(size, t3, t1, .slow)
integerComparison(t0, t1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
macro compareUnsignedJumpOp(opcodeName, opcodeStruct, integerCompareMacro)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_lhs, t2)
get(m_rhs, t3)
loadConstantOrVariable(size, t2, t0)
loadConstantOrVariable(size, t3, t1)
integerCompareMacro(t0, t1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
end)
end
macro compareUnsignedOp(opcodeName, opcodeStruct, integerCompareAndSet)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_lhs, t2)
get(m_rhs, t0)
loadConstantOrVariable(size, t0, t1)
loadConstantOrVariable(size, t2, t0)
integerCompareAndSet(t0, t1, t0)
orq ValueFalse, t0
return(t0)
end)
end
llintOpWithJump(op_switch_imm, OpSwitchImm, macro (size, get, jump, dispatch)
get(m_scrutinee, t2)
getu(size, OpSwitchImm, m_tableIndex, t3)
loadConstantOrVariable(size, t2, t1)
loadp CodeBlock[cfr], t2
loadp CodeBlock::m_rareData[t2], t2
muli sizeof SimpleJumpTable, t3
loadp CodeBlock::RareData::m_switchJumpTables + VectorBufferOffset[t2], t2
addp t3, t2
bqb t1, numberTag, .opSwitchImmNotInt
subi SimpleJumpTable::min[t2], t1
biaeq t1, SimpleJumpTable::branchOffsets + VectorSizeOffset[t2], .opSwitchImmFallThrough
loadp SimpleJumpTable::branchOffsets + VectorBufferOffset[t2], t3
loadis [t3, t1, 4], t1
btiz t1, .opSwitchImmFallThrough
dispatchIndirect(t1)
.opSwitchImmNotInt:
btqnz t1, numberTag, .opSwitchImmSlow # Go slow if it's a double.
.opSwitchImmFallThrough:
jump(m_defaultOffset)
.opSwitchImmSlow:
callSlowPath(_llint_slow_path_switch_imm)
nextInstruction()
end)
llintOpWithJump(op_switch_char, OpSwitchChar, macro (size, get, jump, dispatch)
get(m_scrutinee, t2)
getu(size, OpSwitchChar, m_tableIndex, t3)
loadConstantOrVariable(size, t2, t1)
loadp CodeBlock[cfr], t2
loadp CodeBlock::m_rareData[t2], t2
muli sizeof SimpleJumpTable, t3
loadp CodeBlock::RareData::m_switchJumpTables + VectorBufferOffset[t2], t2
addp t3, t2
btqnz t1, notCellMask, .opSwitchCharFallThrough
bbneq JSCell::m_type[t1], StringType, .opSwitchCharFallThrough
loadp JSString::m_fiber[t1], t0
btpnz t0, isRopeInPointer, .opSwitchOnRope
bineq StringImpl::m_length[t0], 1, .opSwitchCharFallThrough
loadp StringImpl::m_data8[t0], t1
btinz StringImpl::m_hashAndFlags[t0], HashFlags8BitBuffer, .opSwitchChar8Bit
loadh [t1], t0
jmp .opSwitchCharReady
.opSwitchChar8Bit:
loadb [t1], t0
.opSwitchCharReady:
subi SimpleJumpTable::min[t2], t0
biaeq t0, SimpleJumpTable::branchOffsets + VectorSizeOffset[t2], .opSwitchCharFallThrough
loadp SimpleJumpTable::branchOffsets + VectorBufferOffset[t2], t2
loadis [t2, t0, 4], t1
btiz t1, .opSwitchCharFallThrough
dispatchIndirect(t1)
.opSwitchCharFallThrough:
jump(m_defaultOffset)
.opSwitchOnRope:
bineq JSRopeString::m_compactFibers + JSRopeString::CompactFibers::m_length[t1], 1, .opSwitchCharFallThrough
.opSwitchOnRopeChar:
callSlowPath(_llint_slow_path_switch_char)
nextInstruction()
end)
# we assume t5 contains the metadata, and we should not scratch that
macro arrayProfileForCall(opcodeStruct, getu)
getu(m_argv, t3)
negp t3
loadq ThisArgumentOffset[cfr, t3, 8], t0
btqnz t0, notCellMask, .done
loadi JSCell::m_structureID[t0], t3
storei t3, %opcodeStruct%::Metadata::m_callLinkInfo.m_arrayProfile.m_lastSeenStructureID[t5]
.done:
end
macro commonCallOp(opcodeName, slowPath, opcodeStruct, prepareCall, prologue)
llintOpWithMetadata(opcodeName, opcodeStruct, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
prologue(macro (fieldName, dst)
getu(size, opcodeStruct, fieldName, dst)
end, metadata)
get(m_callee, t0)
loadp %opcodeStruct%::Metadata::m_callLinkInfo.m_calleeOrLastSeenCalleeWithLinkBit[t5], t2
loadConstantOrVariable(size, t0, t3)
bqneq t3, t2, .opCallSlow
getu(size, opcodeStruct, m_argv, t3)
lshifti 3, t3
negp t3
addp cfr, t3
storeq t2, Callee[t3]
getu(size, opcodeStruct, m_argc, t2)
storePC()
storei t2, ArgumentCountIncludingThis + PayloadOffset[t3]
move t3, sp
prepareCall(%opcodeStruct%::Metadata::m_callLinkInfo.m_machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
callTargetFunction(opcodeName, size, opcodeStruct, dispatch, %opcodeStruct%::Metadata::m_callLinkInfo.m_machineCodeTarget[t5], JSEntryPtrTag)
.opCallSlow:
slowPathForCall(opcodeName, size, opcodeStruct, dispatch, slowPath, prepareCall)
end)
end
llintOp(op_ret, OpRet, macro (size, get, dispatch)
checkSwitchToJITForEpilogue()
get(m_value, t2)
loadConstantOrVariable(size, t2, r0)
doReturn()
end)
llintOpWithReturn(op_to_primitive, OpToPrimitive, macro (size, get, dispatch, return)
get(m_src, t2)
loadConstantOrVariable(size, t2, t0)
btqnz t0, notCellMask, .opToPrimitiveIsImm
bbaeq JSCell::m_type[t0], ObjectType, .opToPrimitiveSlowCase
.opToPrimitiveIsImm:
return(t0)
.opToPrimitiveSlowCase:
callSlowPath(_slow_path_to_primitive)
dispatch()
end)
commonOp(llint_op_catch, macro() end, macro (size)
# This is where we end up from the JIT's throw trampoline (because the
# machine code return address will be set to _llint_op_catch), and from
# the interpreter's throw trampoline (see _llint_throw_trampoline).
# The throwing code must have known that we were throwing to the interpreter,
# and have set VM::targetInterpreterPCForThrow.
loadp Callee[cfr], t3
convertCalleeToVM(t3)
restoreCalleeSavesFromVMEntryFrameCalleeSavesBuffer(t3, t0)
loadp VM::callFrameForCatch[t3], cfr
storep 0, VM::callFrameForCatch[t3]
restoreStackPointerAfterCall()
loadp CodeBlock[cfr], PB
loadp CodeBlock::m_metadata[PB], metadataTable
loadp CodeBlock::m_instructionsRawPointer[PB], PB
loadp VM::targetInterpreterPCForThrow[t3], PC
subp PB, PC
callSlowPath(_llint_slow_path_check_if_exception_is_uncatchable_and_notify_profiler)
bpeq r1, 0, .isCatchableException
jmp _llint_throw_from_slow_path_trampoline
.isCatchableException:
loadp CodeBlock[cfr], t3
loadp CodeBlock::m_vm[t3], t3
loadp VM::m_exception[t3], t0
storep 0, VM::m_exception[t3]
get(size, OpCatch, m_exception, t2)
storeq t0, [cfr, t2, 8]
loadq Exception::m_value[t0], t3
get(size, OpCatch, m_thrownValue, t2)
storeq t3, [cfr, t2, 8]
traceExecution()
callSlowPath(_llint_slow_path_profile_catch)
dispatchOp(size, op_catch)
end)
llintOp(op_end, OpEnd, macro (size, get, dispatch)
checkSwitchToJITForEpilogue()
get(m_value, t0)
assertNotConstant(size, t0)
loadq [cfr, t0, 8], r0
doReturn()
end)
op(llint_throw_from_slow_path_trampoline, macro ()
loadp Callee[cfr], t1
convertCalleeToVM(t1)
copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(t1, t2)
callSlowPath(_llint_slow_path_handle_exception)
# When throwing from the interpreter (i.e. throwing from LLIntSlowPaths), so
# the throw target is not necessarily interpreted code, we come to here.
# This essentially emulates the JIT's throwing protocol.
loadp Callee[cfr], t1
convertCalleeToVM(t1)
jmp VM::targetMachinePCForThrow[t1], ExceptionHandlerPtrTag
end)
op(llint_throw_during_call_trampoline, macro ()
preserveReturnAddressAfterCall(t2)
jmp _llint_throw_from_slow_path_trampoline
end)
macro nativeCallTrampoline(executableOffsetToFunction)
functionPrologue()
storep 0, CodeBlock[cfr]
loadp Callee[cfr], a0
loadp JSFunction::m_executableOrRareData[a0], a2
btpz a2, (constexpr JSFunction::rareDataTag), .isExecutable
loadp (FunctionRareData::m_executable - (constexpr JSFunction::rareDataTag))[a2], a2
.isExecutable:
loadp JSFunction::m_scope[a0], a0
loadp JSGlobalObject::m_vm[a0], a1
storep cfr, VM::topCallFrame[a1]
if ARM64 or ARM64E or C_LOOP or C_LOOP_WIN
storep lr, ReturnPC[cfr]
end
move cfr, a1
checkStackPointerAlignment(t3, 0xdead0001)
if C_LOOP or C_LOOP_WIN
cloopCallNative executableOffsetToFunction[a2]
else
if X86_64_WIN
subp 32, sp
call executableOffsetToFunction[a2], JSEntryPtrTag
addp 32, sp
else
call executableOffsetToFunction[a2], JSEntryPtrTag
end
end
loadp Callee[cfr], t3
loadp JSFunction::m_scope[t3], t3
loadp JSGlobalObject::m_vm[t3], t3
btpnz VM::m_exception[t3], .handleException
functionEpilogue()
ret
.handleException:
storep cfr, VM::topCallFrame[t3]
jmp _llint_throw_from_slow_path_trampoline
end
macro internalFunctionCallTrampoline(offsetOfFunction)
functionPrologue()
storep 0, CodeBlock[cfr]
loadp Callee[cfr], a2
loadp InternalFunction::m_globalObject[a2], a0
loadp JSGlobalObject::m_vm[a0], a1
storep cfr, VM::topCallFrame[a1]
if ARM64 or ARM64E or C_LOOP or C_LOOP_WIN
storep lr, ReturnPC[cfr]
end
move cfr, a1
checkStackPointerAlignment(t3, 0xdead0001)
if C_LOOP or C_LOOP_WIN
cloopCallNative offsetOfFunction[a2]
else
if X86_64_WIN
subp 32, sp
call offsetOfFunction[a2], JSEntryPtrTag
addp 32, sp
else
call offsetOfFunction[a2], JSEntryPtrTag
end
end
loadp Callee[cfr], t3
loadp InternalFunction::m_globalObject[t3], t3
loadp JSGlobalObject::m_vm[t3], t3
btpnz VM::m_exception[t3], .handleException
functionEpilogue()
ret
.handleException:
storep cfr, VM::topCallFrame[t3]
jmp _llint_throw_from_slow_path_trampoline
end
macro varInjectionCheck(slowPath, scratch)
loadp CodeBlock[cfr], scratch
loadp CodeBlock::m_globalObject[scratch], scratch
loadp JSGlobalObject::m_varInjectionWatchpoint[scratch], scratch
bbeq WatchpointSet::m_state[scratch], IsInvalidated, slowPath
end
llintOpWithMetadata(op_resolve_scope, OpResolveScope, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
macro getConstantScope(dst)
loadp OpResolveScope::Metadata::m_constantScope[t5], dst
end
macro returnConstantScope()
getConstantScope(t0)
return(t0)
end
macro globalLexicalBindingEpochCheck(slowPath, globalObject, scratch)
loadi OpResolveScope::Metadata::m_globalLexicalBindingEpoch[t5], scratch
bineq JSGlobalObject::m_globalLexicalBindingEpoch[globalObject], scratch, slowPath
end
macro resolveScope()
loadi OpResolveScope::Metadata::m_localScopeDepth[t5], t2
get(m_scope, t0)
loadq [cfr, t0, 8], t0
btiz t2, .resolveScopeLoopEnd
.resolveScopeLoop:
loadp JSScope::m_next[t0], t0
subi 1, t2
btinz t2, .resolveScopeLoop
.resolveScopeLoopEnd:
return(t0)
end
loadi OpResolveScope::Metadata::m_resolveType[t5], t0
#rGlobalProperty:
bineq t0, GlobalProperty, .rGlobalVar
getConstantScope(t0)
globalLexicalBindingEpochCheck(.rDynamic, t0, t2)
return(t0)
.rGlobalVar:
bineq t0, GlobalVar, .rGlobalLexicalVar
returnConstantScope()
.rGlobalLexicalVar:
bineq t0, GlobalLexicalVar, .rClosureVar
returnConstantScope()
.rClosureVar:
bineq t0, ClosureVar, .rModuleVar
resolveScope()
.rModuleVar:
bineq t0, ModuleVar, .rGlobalPropertyWithVarInjectionChecks
returnConstantScope()
.rGlobalPropertyWithVarInjectionChecks:
bineq t0, GlobalPropertyWithVarInjectionChecks, .rGlobalVarWithVarInjectionChecks
varInjectionCheck(.rDynamic, t2)
getConstantScope(t0)
globalLexicalBindingEpochCheck(.rDynamic, t0, t2)
return(t0)
.rGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .rGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.rDynamic, t2)
returnConstantScope()
.rGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .rClosureVarWithVarInjectionChecks
varInjectionCheck(.rDynamic, t2)
returnConstantScope()
.rClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .rDynamic
varInjectionCheck(.rDynamic, t2)
resolveScope()
.rDynamic:
callSlowPath(_slow_path_resolve_scope)
dispatch()
end)
macro loadWithStructureCheck(opcodeStruct, get, slowPath)
get(m_scope, t0)
loadq [cfr, t0, 8], t0
loadStructureWithScratch(t0, t2, t1, t3)
loadp %opcodeStruct%::Metadata::m_structure[t5], t1
bpneq t2, t1, slowPath
end
llintOpWithMetadata(op_get_from_scope, OpGetFromScope, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
macro getProperty()
loadp OpGetFromScope::Metadata::m_operand[t5], t1
loadPropertyAtVariableOffset(t1, t0, t2)
valueProfile(OpGetFromScope, t5, t2)
return(t2)
end
macro getGlobalVar(tdzCheckIfNecessary)
loadp OpGetFromScope::Metadata::m_operand[t5], t0
loadq [t0], t0
tdzCheckIfNecessary(t0)
valueProfile(OpGetFromScope, t5, t0)
return(t0)
end
macro getClosureVar()
loadp OpGetFromScope::Metadata::m_operand[t5], t1
loadq JSLexicalEnvironment_variables[t0, t1, 8], t0
valueProfile(OpGetFromScope, t5, t0)
return(t0)
end
loadi OpGetFromScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
andi ResolveTypeMask, t0
#gGlobalProperty:
bineq t0, GlobalProperty, .gGlobalVar
loadWithStructureCheck(OpGetFromScope, get, .gDynamic) # This structure check includes lexical binding epoch check since when the epoch is changed, scope will be changed too.
getProperty()
.gGlobalVar:
bineq t0, GlobalVar, .gGlobalLexicalVar
getGlobalVar(macro(v) end)
.gGlobalLexicalVar:
bineq t0, GlobalLexicalVar, .gClosureVar
getGlobalVar(
macro (value)
bqeq value, ValueEmpty, .gDynamic
end)
.gClosureVar:
bineq t0, ClosureVar, .gGlobalPropertyWithVarInjectionChecks
loadVariable(get, m_scope, t0)
getClosureVar()
.gGlobalPropertyWithVarInjectionChecks:
bineq t0, GlobalPropertyWithVarInjectionChecks, .gGlobalVarWithVarInjectionChecks
loadWithStructureCheck(OpGetFromScope, get, .gDynamic) # This structure check includes lexical binding epoch check since when the epoch is changed, scope will be changed too.
getProperty()
.gGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .gGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.gDynamic, t2)
getGlobalVar(macro(v) end)
.gGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .gClosureVarWithVarInjectionChecks
varInjectionCheck(.gDynamic, t2)
getGlobalVar(
macro (value)
bqeq value, ValueEmpty, .gDynamic
end)
.gClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .gDynamic
varInjectionCheck(.gDynamic, t2)
loadVariable(get, m_scope, t0)
getClosureVar()
.gDynamic:
callSlowPath(_llint_slow_path_get_from_scope)
dispatch()
end)
llintOpWithMetadata(op_put_to_scope, OpPutToScope, macro (size, get, dispatch, metadata, return)
macro putProperty()
get(m_value, t1)
loadConstantOrVariable(size, t1, t2)
loadp OpPutToScope::Metadata::m_operand[t5], t1
storePropertyAtVariableOffset(t1, t0, t2)
end
macro putGlobalVariable()
get(m_value, t0)
loadConstantOrVariable(size, t0, t1)
loadp OpPutToScope::Metadata::m_watchpointSet[t5], t2
btpz t2, .noVariableWatchpointSet
notifyWrite(t2, .pDynamic)
.noVariableWatchpointSet:
loadp OpPutToScope::Metadata::m_operand[t5], t0
storeq t1, [t0]
end
macro putClosureVar()
get(m_value, t1)
loadConstantOrVariable(size, t1, t2)
loadp OpPutToScope::Metadata::m_operand[t5], t1
storeq t2, JSLexicalEnvironment_variables[t0, t1, 8]
end
macro putLocalClosureVar()
get(m_value, t1)
loadConstantOrVariable(size, t1, t2)
loadp OpPutToScope::Metadata::m_watchpointSet[t5], t3
btpz t3, .noVariableWatchpointSet
notifyWrite(t3, .pDynamic)
.noVariableWatchpointSet:
loadp OpPutToScope::Metadata::m_operand[t5], t1
storeq t2, JSLexicalEnvironment_variables[t0, t1, 8]
end
macro checkTDZInGlobalPutToScopeIfNecessary()
loadi OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
andi InitializationModeMask, t0
rshifti InitializationModeShift, t0
bineq t0, NotInitialization, .noNeedForTDZCheck
loadp OpPutToScope::Metadata::m_operand[t5], t0
loadq [t0], t0
bqeq t0, ValueEmpty, .pDynamic
.noNeedForTDZCheck:
end
metadata(t5, t0)
loadi OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
andi ResolveTypeMask, t0
#pLocalClosureVar:
bineq t0, LocalClosureVar, .pGlobalProperty
loadVariable(get, m_scope, t0)
putLocalClosureVar()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalProperty:
bineq t0, GlobalProperty, .pGlobalVar
loadWithStructureCheck(OpPutToScope, get, .pDynamic) # This structure check includes lexical binding epoch check since when the epoch is changed, scope will be changed too.
putProperty()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalVar:
bineq t0, GlobalVar, .pGlobalLexicalVar
putGlobalVariable()
writeBarrierOnGlobalObject(size, get, m_value)
dispatch()
.pGlobalLexicalVar:
bineq t0, GlobalLexicalVar, .pClosureVar
checkTDZInGlobalPutToScopeIfNecessary()
putGlobalVariable()
writeBarrierOnGlobalLexicalEnvironment(size, get, m_value)
dispatch()
.pClosureVar:
bineq t0, ClosureVar, .pGlobalPropertyWithVarInjectionChecks
loadVariable(get, m_scope, t0)
putClosureVar()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalPropertyWithVarInjectionChecks:
bineq t0, GlobalPropertyWithVarInjectionChecks, .pGlobalVarWithVarInjectionChecks
loadWithStructureCheck(OpPutToScope, get, .pDynamic) # This structure check includes lexical binding epoch check since when the epoch is changed, scope will be changed too.
putProperty()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .pGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.pDynamic, t2)
putGlobalVariable()
writeBarrierOnGlobalObject(size, get, m_value)
dispatch()
.pGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .pClosureVarWithVarInjectionChecks
varInjectionCheck(.pDynamic, t2)
checkTDZInGlobalPutToScopeIfNecessary()
putGlobalVariable()
writeBarrierOnGlobalLexicalEnvironment(size, get, m_value)
dispatch()
.pClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .pModuleVar
varInjectionCheck(.pDynamic, t2)
loadVariable(get, m_scope, t0)
putClosureVar()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pModuleVar:
bineq t0, ModuleVar, .pDynamic
callSlowPath(_slow_path_throw_strict_mode_readonly_property_write_error)
dispatch()
.pDynamic:
callSlowPath(_llint_slow_path_put_to_scope)
dispatch()
end)
llintOpWithProfile(op_get_from_arguments, OpGetFromArguments, macro (size, get, dispatch, return)
loadVariable(get, m_arguments, t0)
getu(size, OpGetFromArguments, m_index, t1)
loadq DirectArguments_storage[t0, t1, 8], t0
return(t0)
end)
llintOp(op_put_to_arguments, OpPutToArguments, macro (size, get, dispatch)
loadVariable(get, m_arguments, t0)
getu(size, OpPutToArguments, m_index, t1)
get(m_value, t3)
loadConstantOrVariable(size, t3, t2)
storeq t2, DirectArguments_storage[t0, t1, 8]
writeBarrierOnOperands(size, get, m_arguments, m_value)
dispatch()
end)
llintOpWithReturn(op_get_parent_scope, OpGetParentScope, macro (size, get, dispatch, return)
loadVariable(get, m_scope, t0)
loadp JSScope::m_next[t0], t0
return(t0)
end)
llintOpWithMetadata(op_profile_type, OpProfileType, macro (size, get, dispatch, metadata, return)
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_vm[t1], t1
# t1 is holding the pointer to the typeProfilerLog.
loadp VM::m_typeProfilerLog[t1], t1
# t2 is holding the pointer to the current log entry.
loadp TypeProfilerLog::m_currentLogEntryPtr[t1], t2
# t0 is holding the JSValue argument.
get(m_targetVirtualRegister, t3)
loadConstantOrVariable(size, t3, t0)
bqeq t0, ValueEmpty, .opProfileTypeDone
# Store the JSValue onto the log entry.
storeq t0, TypeProfilerLog::LogEntry::value[t2]
# Store the TypeLocation onto the log entry.
metadata(t5, t3)
loadp OpProfileType::Metadata::m_typeLocation[t5], t3
storep t3, TypeProfilerLog::LogEntry::location[t2]
btqz t0, notCellMask, .opProfileTypeIsCell
storei 0, TypeProfilerLog::LogEntry::structureID[t2]
jmp .opProfileTypeSkipIsCell
.opProfileTypeIsCell:
loadi JSCell::m_structureID[t0], t3
storei t3, TypeProfilerLog::LogEntry::structureID[t2]
.opProfileTypeSkipIsCell:
# Increment the current log entry.
addp sizeof TypeProfilerLog::LogEntry, t2
storep t2, TypeProfilerLog::m_currentLogEntryPtr[t1]
loadp TypeProfilerLog::m_logEndPtr[t1], t1
bpneq t2, t1, .opProfileTypeDone
callSlowPath(_slow_path_profile_type_clear_log)
.opProfileTypeDone:
dispatch()
end)
llintOpWithMetadata(op_profile_control_flow, OpProfileControlFlow, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
loadp OpProfileControlFlow::Metadata::m_basicBlockLocation[t5], t0
addq 1, BasicBlockLocation::m_executionCount[t0]
dispatch()
end)
llintOpWithReturn(op_get_rest_length, OpGetRestLength, macro (size, get, dispatch, return)
loadi PayloadOffset + ArgumentCountIncludingThis[cfr], t0
subi 1, t0
getu(size, OpGetRestLength, m_numParametersToSkip, t1)
bilteq t0, t1, .storeZero
subi t1, t0
jmp .boxUp
.storeZero:
move 0, t0
.boxUp:
orq numberTag, t0
return(t0)
end)
llintOpWithProfile(op_get_internal_field, OpGetInternalField, macro (size, get, dispatch, return)
loadVariable(get, m_base, t1)
getu(size, OpGetInternalField, m_index, t2)
loadq JSInternalFieldObjectImpl_internalFields[t1, t2, SlotSize], t0
return(t0)
end)
llintOp(op_put_internal_field, OpPutInternalField, macro (size, get, dispatch)
loadVariable(get, m_base, t0)
get(m_value, t1)
loadConstantOrVariable(size, t1, t2)
getu(size, OpPutInternalField, m_index, t1)
storeq t2, JSInternalFieldObjectImpl_internalFields[t0, t1, SlotSize]
writeBarrierOnCellAndValueWithReload(t0, t2, macro() end)
dispatch()
end)
llintOp(op_log_shadow_chicken_prologue, OpLogShadowChickenPrologue, macro (size, get, dispatch)
acquireShadowChickenPacket(.opLogShadowChickenPrologueSlow)
storep cfr, ShadowChicken::Packet::frame[t0]
loadp CallerFrame[cfr], t1
storep t1, ShadowChicken::Packet::callerFrame[t0]
loadp Callee[cfr], t1
storep t1, ShadowChicken::Packet::callee[t0]
loadVariable(get, m_scope, t1)
storep t1, ShadowChicken::Packet::scope[t0]
dispatch()
.opLogShadowChickenPrologueSlow:
callSlowPath(_llint_slow_path_log_shadow_chicken_prologue)
dispatch()
end)
llintOp(op_log_shadow_chicken_tail, OpLogShadowChickenTail, macro (size, get, dispatch)
acquireShadowChickenPacket(.opLogShadowChickenTailSlow)
storep cfr, ShadowChicken::Packet::frame[t0]
storep ShadowChickenTailMarker, ShadowChicken::Packet::callee[t0]
loadVariable(get, m_thisValue, t1)
storep t1, ShadowChicken::Packet::thisValue[t0]
loadVariable(get, m_scope, t1)
storep t1, ShadowChicken::Packet::scope[t0]
loadp CodeBlock[cfr], t1
storep t1, ShadowChicken::Packet::codeBlock[t0]
storei PC, ShadowChicken::Packet::callSiteIndex[t0]
dispatch()
.opLogShadowChickenTailSlow:
callSlowPath(_llint_slow_path_log_shadow_chicken_tail)
dispatch()
end)