LowLevelInterpreter32_64.asm [plain text]
# 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 [PC], t0
leap _g_opcodeMap, t1
jmp [t1, t0, 4], BytecodePtrTag
end
macro nextInstructionWide()
loadi 1[PC], t0
leap _g_opcodeMapWide, t1
jmp [t1, t0, 4], BytecodePtrTag
end
macro getuOperandNarrow(opcodeStruct, fieldName, dst)
loadb constexpr %opcodeStruct%_%fieldName%_index[PC], dst
end
macro getOperandNarrow(opcodeStruct, fieldName, dst)
loadbsp constexpr %opcodeStruct%_%fieldName%_index[PC], dst
end
macro getuOperandWide(opcodeStruct, fieldName, dst)
loadi constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PC], dst
end
macro getOperandWide(opcodeStruct, fieldName, dst)
loadis constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PC], dst
end
macro makeReturn(get, dispatch, fn)
fn(macro(tag, payload)
move tag, t5
move payload, t3
get(m_dst, t2)
storei t5, TagOffset[cfr, t2, 8]
storei t3, PayloadOffset[cfr, t2, 8]
dispatch()
end)
end
macro makeReturnProfiled(opcodeStruct, get, metadata, dispatch, fn)
fn(macro (tag, payload)
move tag, t1
move payload, t0
metadata(t5, t2)
valueProfile(opcodeStruct, t5, t1, t0)
get(m_dst, t2)
storei t1, TagOffset[cfr, t2, 8]
storei t0, PayloadOffset[cfr, t2, 8]
dispatch()
end)
end
macro dispatchAfterCall(size, opcodeStruct, dispatch)
loadi ArgumentCount + TagOffset[cfr], PC
get(size, opcodeStruct, m_dst, t3)
storei r1, TagOffset[cfr, t3, 8]
storei r0, PayloadOffset[cfr, t3, 8]
metadata(size, opcodeStruct, t2, t3)
valueProfile(opcodeStruct, t2, r1, r0)
dispatch()
end
macro cCall2(function)
if ARMv7 or MIPS
call function
elsif X86 or X86_WIN
subp 8, sp
push a1
push a0
call function
addp 16, sp
elsif C_LOOP
cloopCallSlowPath function, a0, a1
else
error
end
end
macro cCall2Void(function)
if C_LOOP
cloopCallSlowPathVoid function, a0, a1
else
cCall2(function)
end
end
macro cCall4(function)
if ARMv7 or MIPS
call function
elsif X86 or X86_WIN
push a3
push a2
push a1
push a0
call function
addp 16, sp
elsif C_LOOP
error
else
error
end
end
macro callSlowPath(slowPath)
move cfr, a0
move PC, a1
cCall2(slowPath)
move r0, PC
end
macro doVMEntry(makeCall)
functionPrologue()
pushCalleeSaves()
# x86 needs to load arguments from the stack
if X86 or X86_WIN
loadp 16[cfr], a2
loadp 12[cfr], a1
loadp 8[cfr], a0
end
const entry = a0
const vm = a1
const protoCallFrame = a2
# We are using t3, t4 and t5 as temporaries through the function.
# Since we have the guarantee that tX != aY when X != Y, we are safe from
# aliasing problems with our arguments.
if ARMv7
vmEntryRecord(cfr, t3)
move t3, sp
else
vmEntryRecord(cfr, sp)
end
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]
# Align stack pointer
if X86_WIN or MIPS
addp CallFrameAlignSlots * SlotSize, sp, t3
andp ~StackAlignmentMask, t3
subp t3, CallFrameAlignSlots * SlotSize, sp
elsif ARMv7
addp CallFrameAlignSlots * SlotSize, sp, t3
clrbp t3, StackAlignmentMask, t3
subp t3, CallFrameAlignSlots * SlotSize, t3
move t3, sp
end
loadi ProtoCallFrame::paddedArgCount[protoCallFrame], t4
addp CallFrameHeaderSlots, t4, t4
lshiftp 3, t4
subp sp, t4, t3
bpa t3, sp, .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
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:
subi 1, t3
loadi TagOffset[protoCallFrame, t3, 8], t5
storei t5, TagOffset + CodeBlock[sp, t3, 8]
loadi PayloadOffset[protoCallFrame, t3, 8], t5
storei t5, PayloadOffset + CodeBlock[sp, t3, 8]
btinz t3, .copyHeaderLoop
loadi PayloadOffset + ProtoCallFrame::argCountAndCodeOriginValue[protoCallFrame], t4
subi 1, t4
loadi ProtoCallFrame::paddedArgCount[protoCallFrame], t5
subi 1, t5
bieq t4, t5, .copyArgs
.fillExtraArgsLoop:
subi 1, t5
storei UndefinedTag, ThisArgumentOffset + 8 + TagOffset[sp, t5, 8]
storei 0, ThisArgumentOffset + 8 + PayloadOffset[sp, t5, 8]
bineq t4, t5, .fillExtraArgsLoop
.copyArgs:
loadp ProtoCallFrame::args[protoCallFrame], t3
.copyArgsLoop:
btiz t4, .copyArgsDone
subi 1, t4
loadi TagOffset[t3, t4, 8], t5
storei t5, ThisArgumentOffset + 8 + TagOffset[sp, t4, 8]
loadi PayloadOffset[t3, t4, 8], t5
storei t5, ThisArgumentOffset + 8 + PayloadOffset[sp, t4, 8]
jmp .copyArgsLoop
.copyArgsDone:
storep sp, VM::topCallFrame[vm]
storep cfr, VM::topEntryFrame[vm]
makeCall(entry, t3, t4)
if ARMv7
vmEntryRecord(cfr, t3)
move t3, sp
else
vmEntryRecord(cfr, sp)
end
loadp VMEntryRecord::m_vm[sp], t5
loadp VMEntryRecord::m_prevTopCallFrame[sp], t4
storep t4, VM::topCallFrame[t5]
loadp VMEntryRecord::m_prevTopEntryFrame[sp], t4
storep t4, VM::topEntryFrame[t5]
if ARMv7
subp cfr, CalleeRegisterSaveSize, t5
move t5, sp
else
subp cfr, CalleeRegisterSaveSize, sp
end
popCalleeSaves()
functionEpilogue()
ret
.throwStackOverflow:
subp 8, sp # Align stack for cCall2() to make a call.
move vm, a0
move protoCallFrame, a1
cCall2(_llint_throw_stack_overflow_error)
if ARMv7
vmEntryRecord(cfr, t3)
move t3, sp
else
vmEntryRecord(cfr, sp)
end
loadp VMEntryRecord::m_vm[sp], t5
loadp VMEntryRecord::m_prevTopCallFrame[sp], t4
storep t4, VM::topCallFrame[t5]
loadp VMEntryRecord::m_prevTopEntryFrame[sp], t4
storep t4, VM::topEntryFrame[t5]
if ARMv7
subp cfr, CalleeRegisterSaveSize, t5
move t5, sp
else
subp cfr, CalleeRegisterSaveSize, sp
end
popCalleeSaves()
functionEpilogue()
ret
end
macro makeJavaScriptCall(entry, temp, unused)
addp CallerFrameAndPCSize, sp
checkStackPointerAlignment(temp, 0xbad0dc02)
if C_LOOP
cloopCallJSFunction entry
else
call entry
end
checkStackPointerAlignment(temp, 0xbad0dc03)
subp CallerFrameAndPCSize, sp
end
macro makeHostFunctionCall(entry, temp1, temp2)
move entry, temp1
storep cfr, [sp]
if C_LOOP
move sp, a0
storep lr, PtrSize[sp]
cloopCallNative temp1
elsif X86 or X86_WIN
# Put callee frame pointer on stack as arg0, also put it in ecx for "fastcall" targets
move 0, temp2
move temp2, 4[sp] # put 0 in ReturnPC
move sp, a0 # a0 is ecx
push temp2 # Push dummy arg1
push a0
call temp1
addp 8, sp
else
move sp, a0
call temp1
end
end
op(handleUncaughtException, macro()
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
restoreCalleeSavesFromVMEntryFrameCalleeSavesBuffer(t3, t0)
storep 0, VM::callFrameForCatch[t3]
loadp VM::topEntryFrame[t3], cfr
if ARMv7
vmEntryRecord(cfr, t3)
move t3, sp
else
vmEntryRecord(cfr, sp)
end
loadp VMEntryRecord::m_vm[sp], t3
loadp VMEntryRecord::m_prevTopCallFrame[sp], t5
storep t5, VM::topCallFrame[t3]
loadp VMEntryRecord::m_prevTopEntryFrame[sp], t5
storep t5, VM::topEntryFrame[t3]
if ARMv7
subp cfr, CalleeRegisterSaveSize, t3
move t3, sp
else
subp cfr, CalleeRegisterSaveSize, sp
end
popCalleeSaves()
functionEpilogue()
ret
end)
macro doReturnFromHostFunction(extraStackSpace)
functionEpilogue(extraStackSpace)
ret
end
# Debugging operation if you'd like to print an operand in the instruction stream. fromWhere
# should be an immediate integer - any integer you like; use it to identify the place you're
# debugging from. operand should likewise be an immediate, and should identify the operand
# in the instruction stream you'd like to print out.
macro traceOperand(fromWhere, operand)
move fromWhere, a2
move operand, a3
move cfr, a0
move PC, a1
cCall4(_llint_trace_operand)
move r0, PC
move r1, cfr
end
# Debugging operation if you'd like to print the value of an operand in the instruction
# stream. Same as traceOperand(), but assumes that the operand is a register, and prints its
# value.
macro traceValue(fromWhere, operand)
move fromWhere, a2
move operand, a3
move cfr, a0
move PC, a1
cCall4(_llint_trace_value)
move r0, PC
move r1, cfr
end
# Call a slowPath for call opcodes.
macro callCallSlowPath(slowPath, action)
storep PC, ArgumentCount + TagOffset[cfr]
move cfr, a0
move PC, a1
cCall2(slowPath)
action(r0, r1)
end
macro callTrapHandler(throwHandler)
storei PC, ArgumentCount + TagOffset[cfr]
move cfr, a0
move PC, a1
cCall2(_llint_slow_path_handle_traps)
btpnz r0, throwHandler
loadi ArgumentCount + TagOffset[cfr], PC
end
macro checkSwitchToJITForLoop()
checkSwitchToJIT(
1,
macro ()
storei PC, ArgumentCount + TagOffset[cfr]
move cfr, a0
move PC, a1
cCall2(_llint_loop_osr)
btpz r0, .recover
move r1, sp
jmp r0
.recover:
loadi ArgumentCount + TagOffset[cfr], PC
end)
end
macro loadVariable(get, fieldName, indexReg, tagReg, payloadReg)
get(fieldName, indexReg)
loadi TagOffset[cfr, indexReg, 8], tagReg
loadi PayloadOffset[cfr, indexReg, 8], payloadReg
end
# Index, tag, and payload must be different registers. Index is not
# changed.
macro loadConstantOrVariable(size, index, tag, payload)
size(FirstConstantRegisterIndexNarrow, FirstConstantRegisterIndexWide, macro (FirstConstantRegisterIndex)
bigteq index, FirstConstantRegisterIndex, .constant
loadi TagOffset[cfr, index, 8], tag
loadi PayloadOffset[cfr, index, 8], payload
jmp .done
.constant:
loadp CodeBlock[cfr], payload
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[payload], payload
subp FirstConstantRegisterIndex, index
loadp TagOffset[payload, index, 8], tag
loadp PayloadOffset[payload, index, 8], payload
.done:
end)
end
macro loadConstantOrVariableTag(size, index, tag)
size(FirstConstantRegisterIndexNarrow, FirstConstantRegisterIndexWide, macro (FirstConstantRegisterIndex)
bigteq index, FirstConstantRegisterIndex, .constant
loadi TagOffset[cfr, index, 8], tag
jmp .done
.constant:
loadp CodeBlock[cfr], tag
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[tag], tag
subi FirstConstantRegisterIndex, index
loadp TagOffset[tag, index, 8], tag
.done:
end)
end
# Index and payload may be the same register. Index may be clobbered.
macro loadConstantOrVariable2Reg(size, index, tag, payload)
size(FirstConstantRegisterIndexNarrow, FirstConstantRegisterIndexWide, macro (FirstConstantRegisterIndex)
bigteq index, FirstConstantRegisterIndex, .constant
loadi TagOffset[cfr, index, 8], tag
loadi PayloadOffset[cfr, index, 8], payload
jmp .done
.constant:
loadp CodeBlock[cfr], tag
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[tag], tag
subi FirstConstantRegisterIndex, index
lshifti 3, index
addp index, tag
loadp PayloadOffset[tag], payload
loadp TagOffset[tag], tag
.done:
end)
end
macro loadConstantOrVariablePayloadTagCustom(size, index, tagCheck, payload)
size(FirstConstantRegisterIndexNarrow, FirstConstantRegisterIndexWide, macro (FirstConstantRegisterIndex)
bigteq index, FirstConstantRegisterIndex, .constant
tagCheck(TagOffset[cfr, index, 8])
loadi PayloadOffset[cfr, index, 8], payload
jmp .done
.constant:
loadp CodeBlock[cfr], payload
loadp CodeBlock::m_constantRegisters + VectorBufferOffset[payload], payload
subp FirstConstantRegisterIndex, index
tagCheck(TagOffset[payload, index, 8])
loadp PayloadOffset[payload, index, 8], payload
.done:
end)
end
# Index and payload must be different registers. Index is not mutated. Use
# this if you know what the tag of the variable should be. Doing the tag
# test as part of loading the variable reduces register use, but may not
# be faster than doing loadConstantOrVariable followed by a branch on the
# tag.
macro loadConstantOrVariablePayload(size, index, expectedTag, payload, slow)
loadConstantOrVariablePayloadTagCustom(
size,
index,
macro (actualTag) bineq actualTag, expectedTag, slow end,
payload)
end
macro loadConstantOrVariablePayloadUnchecked(size, index, payload)
loadConstantOrVariablePayloadTagCustom(
size,
index,
macro (actualTag) end,
payload)
end
macro writeBarrierOnOperand(size, get, cellFieldName)
get(cellFieldName, t1)
loadConstantOrVariablePayload(size, t1, CellTag, t2, .writeBarrierDone)
skipIfIsRememberedOrInEden(
t2,
macro()
push cfr, PC
# We make two extra slots because cCall2 will poke.
subp 8, sp
move t2, a1 # t2 can be a0 on x86
move cfr, a0
cCall2Void(_llint_write_barrier_slow)
addp 8, sp
pop PC, cfr
end)
.writeBarrierDone:
end
macro writeBarrierOnOperands(size, get, cellFieldName, valueFieldName)
get(valueFieldName, t1)
loadConstantOrVariableTag(size, t1, t0)
bineq t0, CellTag, .writeBarrierDone
writeBarrierOnOperand(size, get, cellFieldName)
.writeBarrierDone:
end
macro writeBarrierOnGlobal(size, get, valueFieldName, loadMacro)
get(valueFieldName, t1)
loadConstantOrVariableTag(size, t1, t0)
bineq t0, CellTag, .writeBarrierDone
loadMacro(t3)
skipIfIsRememberedOrInEden(
t3,
macro()
push cfr, PC
# We make two extra slots because cCall2 will poke.
subp 8, sp
move cfr, a0
move t3, a1
cCall2Void(_llint_write_barrier_slow)
addp 8, sp
pop PC, cfr
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 valueProfile(opcodeStruct, metadata, tag, payload)
storei tag, %opcodeStruct%::Metadata::m_profile.m_buckets + TagOffset[metadata]
storei payload, %opcodeStruct%::Metadata::m_profile.m_buckets + PayloadOffset[metadata]
end
# Entrypoints into the interpreter
# Expects that CodeBlock is in t1, which is what prologue() leaves behind.
macro functionArityCheck(doneLabel, slowPath)
loadi PayloadOffset + ArgumentCount[cfr], t0
biaeq t0, CodeBlock::m_numParameters[t1], doneLabel
move cfr, a0
move PC, a1
cCall2(slowPath) # This slowPath has a simple protocol: t0 = 0 => no error, t0 != 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 + ArgumentCount[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
.fillExtraSlots:
move 0, t0
storei t0, PayloadOffset[cfr, t2, 8]
move UndefinedTag, t0
storei t0, TagOffset[cfr, t2, 8]
addi 1, t2
bsubinz 1, t3, .fillExtraSlots
andi ~(StackAlignmentSlots - 1), t1
btiz t1, .continue
.noExtraSlot:
// Move frame up t1 slots
negi t1
move cfr, t3
subp CalleeSaveSpaceAsVirtualRegisters * SlotSize, t3
addi CalleeSaveSpaceAsVirtualRegisters, t2
move t1, t0
lshiftp 3, t0
addp t0, cfr
addp t0, sp
.copyLoop:
loadi PayloadOffset[t3], t0
storei t0, PayloadOffset[t3, t1, 8]
loadi TagOffset[t3], t0
storei t0, TagOffset[t3, t1, 8]
addp 8, t3
bsubinz 1, t2, .copyLoop
// Fill new slots with JSUndefined
move t1, t2
.fillLoop:
move 0, t0
storei t0, PayloadOffset[t3, t1, 8]
move UndefinedTag, t0
storei t0, TagOffset[t3, t1, 8]
addp 8, t3
baddinz 1, t2, .fillLoop
.continue:
# Reload CodeBlock and PC, since the slow_path clobbered it.
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_instructionsRawPointer[t1], PC
jmp doneLabel
end
macro branchIfException(label)
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
btpz VM::m_exception[t3], .noException
jmp label
.noException:
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
subi CalleeSaveSpaceAsVirtualRegisters, t2
move cfr, t3
subp CalleeSaveSpaceAsVirtualRegisters * SlotSize, t3
btiz t2, .opEnterDone
move UndefinedTag, t0
move 0, t1
negi t2
.opEnterLoop:
storei t0, TagOffset[t3, t2, 8]
storei t1, PayloadOffset[t3, t2, 8]
addi 1, t2
btinz 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 + ArgumentCount[cfr], t0
bilteq t0, t2, .opGetArgumentOutOfBounds
loadi ThisArgumentOffset + TagOffset[cfr, t2, 8], t0
loadi ThisArgumentOffset + PayloadOffset[cfr, t2, 8], t3
return (t0, t3)
.opGetArgumentOutOfBounds:
return (UndefinedTag, 0)
end)
llintOpWithReturn(op_argument_count, OpArgumentCount, macro (size, get, dispatch, return)
loadi PayloadOffset + ArgumentCount[cfr], t0
subi 1, t0
return(Int32Tag, t0)
end)
llintOpWithReturn(op_get_scope, OpGetScope, macro (size, get, dispatch, return)
loadi Callee + PayloadOffset[cfr], t0
loadp JSCallee::m_scope[t0], t0
return (CellTag, t0)
end)
llintOpWithMetadata(op_to_this, OpToThis, macro (size, get, dispatch, metadata, return)
get(m_srcDst, t0)
bineq TagOffset[cfr, t0, 8], CellTag, .opToThisSlow
loadi PayloadOffset[cfr, t0, 8], t0
bbneq JSCell::m_type[t0], FinalObjectType, .opToThisSlow
metadata(t2, t3)
loadp OpToThis::Metadata::m_cachedStructure[t2], t2
bineq JSCell::m_structureID[t0], t2, .opToThisSlow
dispatch()
.opToThisSlow:
callSlowPath(_slow_path_to_this)
dispatch()
end)
llintOp(op_check_tdz, OpCheckTdz, macro (size, get, dispatch)
get(m_targetVirtualRegister, t0)
loadConstantOrVariableTag(size, t0, t1)
bineq t1, EmptyValueTag, .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, t3)
return(t2, t3)
end)
llintOpWithReturn(op_not, OpNot, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2, t3)
bineq t2, BooleanTag, .opNotSlow
xori 1, t3
return(t2, t3)
.opNotSlow:
callSlowPath(_slow_path_not)
dispatch()
end)
macro equalityComparisonOp(opcodeName, opcodeStruct, integerComparison)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t2, t3, .opEqSlow
bieq t2, CellTag, .opEqSlow
bib t2, LowestTag, .opEqSlow
integerComparison(t0, t1, t0)
return(BooleanTag, t0)
.opEqSlow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
macro equalityJumpOp(opcodeName, opcodeStruct, integerComparison)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t2, t3, .slow
bieq t2, CellTag, .slow
bib t2, LowestTag, .slow
integerComparison(t0, t1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
macro equalNullComparisonOp(opcodeName, opcodeStruct, fn)
llintOpWithReturn(opcodeName, opcodeStruct, macro (size, get, dispatch, return)
get(m_operand, t0)
assertNotConstant(size, t0)
loadi TagOffset[cfr, t0, 8], t1
loadi PayloadOffset[cfr, t0, 8], t0
bineq t1, CellTag, .opEqNullImmediate
btbnz JSCell::m_flags[t0], MasqueradesAsUndefined, .opEqNullMasqueradesAsUndefined
move 0, t1
jmp .opEqNullNotImmediate
.opEqNullMasqueradesAsUndefined:
loadi JSCell::m_structureID[t0], t1
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
cpeq Structure::m_globalObject[t1], t0, t1
jmp .opEqNullNotImmediate
.opEqNullImmediate:
cieq t1, NullTag, t2
cieq t1, UndefinedTag, t1
ori t2, t1
.opEqNullNotImmediate:
fn(t1)
return(BooleanTag, t1)
end)
end
equalNullComparisonOp(op_eq_null, OpEqNull, macro (value) end)
equalNullComparisonOp(op_neq_null, OpNeqNull,
macro (value) xori 1, value end)
macro strictEqOp(opcodeName, opcodeStruct, equalityOperation)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t2, t3, .slow
bib t2, LowestTag, .slow
bineq t2, CellTag, .notStringOrSymbol
bbaeq JSCell::m_type[t0], ObjectType, .notStringOrSymbol
bbb JSCell::m_type[t1], ObjectType, .slow
.notStringOrSymbol:
equalityOperation(t0, t1, t0)
return(BooleanTag, t0)
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
macro strictEqualityJumpOp(opcodeName, opcodeStruct, equalityOperation)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t2, t3, .slow
bib t2, LowestTag, .slow
bineq t2, CellTag, .notStringOrSymbol
bbaeq JSCell::m_type[t0], ObjectType, .notStringOrSymbol
bbb JSCell::m_type[t1], ObjectType, .slow
.notStringOrSymbol:
equalityOperation(t0, t1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
end)
end
strictEqOp(stricteq, OpStricteq,
macro (left, right, result) cieq left, right, result end)
strictEqOp(nstricteq, OpNstricteq,
macro (left, right, result) cineq left, right, result end)
strictEqualityJumpOp(jstricteq, OpJstricteq,
macro (left, right, target) bieq left, right, target end)
strictEqualityJumpOp(jnstricteq, OpJnstricteq,
macro (left, right, target) bineq left, right, target end)
macro preOp(opcodeName, opcodeStruct, operation)
llintOp(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch)
get(m_srcDst, t0)
bineq TagOffset[cfr, t0, 8], Int32Tag, .slow
loadi PayloadOffset[cfr, t0, 8], t1
operation(t1, .slow)
storei t1, PayloadOffset[cfr, t0, 8]
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, t3)
bieq t2, Int32Tag, .opToNumberIsInt
biaeq t2, LowestTag, .opToNumberSlow
.opToNumberIsInt:
return(t2, t3)
.opToNumberSlow:
callSlowPath(_slow_path_to_number)
dispatch()
end)
llintOpWithReturn(op_to_string, OpToString, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2, t3)
bineq t2, CellTag, .opToStringSlow
bbneq JSCell::m_type[t3], StringType, .opToStringSlow
.opToStringIsString:
return(t2, t3)
.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, t3)
bineq t2, CellTag, .opToObjectSlow
bbb JSCell::m_type[t3], ObjectType, .opToObjectSlow
return(t2, t3)
.opToObjectSlow:
callSlowPath(_slow_path_to_object)
dispatch()
end)
llintOpWithMetadata(op_negate, OpNegate, macro (size, get, dispatch, metadata, return)
macro arithProfile(type)
ori type, OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits[t5]
end
metadata(t5, t0)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t1, t2)
bineq t1, Int32Tag, .opNegateSrcNotInt
btiz t2, 0x7fffffff, .opNegateSlow
negi t2
arithProfile(ArithProfileInt)
return (Int32Tag, t2)
.opNegateSrcNotInt:
bia t1, LowestTag, .opNegateSlow
xori 0x80000000, t1
arithProfile(ArithProfileNumber)
return(t1, t2)
.opNegateSlow:
callSlowPath(_slow_path_negate)
dispatch()
end)
macro binaryOpCustomStore(opcodeName, opcodeStruct, integerOperationAndStore, doubleOperation)
llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
macro arithProfile(type)
ori type, %opcodeStruct%::Metadata::m_arithProfile + ArithProfile::m_bits[t5]
end
metadata(t5, t2)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t2, Int32Tag, .op1NotInt
bineq t3, Int32Tag, .op2NotInt
arithProfile(ArithProfileIntInt)
get(m_dst, t2)
integerOperationAndStore(t3, t1, t0, .slow, t2)
dispatch()
.op1NotInt:
# First operand is definitely not an int, the second operand could be anything.
bia t2, LowestTag, .slow
bib t3, LowestTag, .op1NotIntOp2Double
bineq t3, Int32Tag, .slow
arithProfile(ArithProfileNumberInt)
ci2d t1, ft1
jmp .op1NotIntReady
.op1NotIntOp2Double:
fii2d t1, t3, ft1
arithProfile(ArithProfileNumberNumber)
.op1NotIntReady:
get(m_dst, t1)
fii2d t0, t2, ft0
doubleOperation(ft1, ft0)
stored ft0, [cfr, t1, 8]
dispatch()
.op2NotInt:
# First operand is definitely an int, the second operand is definitely not.
get(m_dst, t2)
bia t3, LowestTag, .slow
arithProfile(ArithProfileIntNumber)
ci2d t0, ft0
fii2d t1, t3, ft1
doubleOperation(ft1, ft0)
stored ft0, [cfr, t2, 8]
dispatch()
.slow:
callSlowPath(_slow_path_%opcodeName%)
dispatch()
end)
end
macro binaryOp(opcodeName, opcodeStruct, integerOperation, doubleOperation)
binaryOpCustomStore(opcodeName, opcodeStruct,
macro (int32Tag, left, right, slow, index)
integerOperation(left, right, slow)
storei int32Tag, TagOffset[cfr, index, 8]
storei right, PayloadOffset[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)
binaryOpCustomStore(mul, OpMul,
macro (int32Tag, left, right, slow, index)
const scratch = int32Tag # We know that we can reuse the int32Tag register since it has a constant.
move right, scratch
bmulio left, scratch, slow
btinz scratch, .done
bilt left, 0, slow
bilt right, 0, slow
.done:
storei Int32Tag, TagOffset[cfr, index, 8]
storei scratch, PayloadOffset[cfr, index, 8]
end,
macro (left, right) muld left, right end)
binaryOp(sub, OpSub,
macro (left, right, slow) bsubio left, right, slow end,
macro (left, right) subd left, right end)
binaryOpCustomStore(div, OpDiv,
macro (int32Tag, left, right, slow, index)
ci2d left, ft0
ci2d right, ft1
divd ft0, ft1
bcd2i ft1, right, .notInt
storei int32Tag, TagOffset[cfr, index, 8]
storei right, PayloadOffset[cfr, index, 8]
jmp .done
.notInt:
stored ft1, [cfr, index, 8]
.done:
end,
macro (left, right) divd left, right end)
llintOpWithReturn(op_unsigned, OpUnsigned, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariablePayload(size, t1, Int32Tag, t2, .opUnsignedSlow)
bilt t2, 0, .opUnsignedSlow
return (Int32Tag, 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, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
bineq t3, Int32Tag, .slow
bineq t2, Int32Tag, .slow
operation(t1, t0)
return (t3, 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
bitOp(lshift, OpLshift,
macro (left, right) lshifti left, right end)
bitOp(rshift, OpRshift,
macro (left, right) rshifti left, right end)
bitOp(urshift, OpUrshift,
macro (left, right) urshifti left, right end)
bitOpProfiled(bitxor, OpBitxor,
macro (left, right) xori left, right end)
bitOpProfiled(bitand, OpBitand,
macro (left, right) andi left, right end)
bitOpProfiled(bitor, OpBitor,
macro (left, right) ori left, right end)
llintOpWithProfile(op_bitnot, OpBitnot, macro (size, get, dispatch, return)
get(m_operand, t0)
loadConstantOrVariable(size, t0, t2, t3)
bineq t2, Int32Tag, .opBitNotSlow
noti t3
return (Int32Tag, t3)
.opBitNotSlow:
callSlowPath(_slow_path_bitnot)
dispatch()
end)
llintOp(op_overrides_has_instance, OpOverridesHasInstance, macro (size, get, dispatch)
get(m_dst, t3)
storei BooleanTag, TagOffset[cfr, t3, 8]
# First check if hasInstanceValue is the one on Function.prototype[Symbol.hasInstance]
get(m_hasInstanceValue, t0)
loadConstantOrVariablePayload(size, t0, CellTag, t2, .opOverrideshasInstanceValueNotCell)
loadConstantOrVariable(size, t0, t1, t2)
bineq t1, CellTag, .opOverrideshasInstanceValueNotCell
# We don't need hasInstanceValue's tag register anymore.
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_globalObject[t1], t1
loadp JSGlobalObject::m_functionProtoHasInstanceSymbolFunction[t1], t1
bineq t1, t2, .opOverrideshasInstanceValueNotDefault
# We know the constructor is a cell.
get(m_constructor, t0)
loadConstantOrVariablePayloadUnchecked(size, t0, t1)
tbz JSCell::m_flags[t1], ImplementsDefaultHasInstance, t0
storei t0, PayloadOffset[cfr, t3, 8]
dispatch()
.opOverrideshasInstanceValueNotCell:
.opOverrideshasInstanceValueNotDefault:
storei 1, PayloadOffset[cfr, t3, 8]
dispatch()
end)
llintOpWithReturn(op_is_empty, OpIsEmpty, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t2, t3)
cieq t2, EmptyValueTag, t3
return(BooleanTag, t3)
end)
llintOpWithReturn(op_is_undefined, OpIsUndefined, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t2, t3)
bieq t2, CellTag, .opIsUndefinedCell
cieq t2, UndefinedTag, t3
return(BooleanTag, t3)
.opIsUndefinedCell:
btbnz JSCell::m_flags[t3], MasqueradesAsUndefined, .opIsUndefinedMasqueradesAsUndefined
return(BooleanTag, 0)
.opIsUndefinedMasqueradesAsUndefined:
loadi JSCell::m_structureID[t3], t1
loadp CodeBlock[cfr], t3
loadp CodeBlock::m_globalObject[t3], t3
cpeq Structure::m_globalObject[t1], t3, t1
return(BooleanTag, t1)
end)
llintOpWithReturn(op_is_boolean, OpIsBoolean, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariableTag(size, t1, t0)
cieq t0, BooleanTag, t0
return(BooleanTag, t0)
end)
llintOpWithReturn(op_is_number, OpIsNumber, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariableTag(size, t1, t0)
addi 1, t0
cib t0, LowestTag + 1, t1
return(BooleanTag, t1)
end)
llintOpWithReturn(op_is_cell_with_type, OpIsCellWithType, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0, t3)
bineq t0, CellTag, .notCellCase
getu(size, OpIsCellWithType, m_type, t0)
cbeq JSCell::m_type[t3], t0, t1
return(BooleanTag, t1)
.notCellCase:
return(BooleanTag, 0)
end)
llintOpWithReturn(op_is_object, OpIsObject, macro (size, get, dispatch, return)
get(m_operand, t1)
loadConstantOrVariable(size, t1, t0, t3)
bineq t0, CellTag, .opIsObjectNotCell
cbaeq JSCell::m_type[t3], ObjectType, t1
return(BooleanTag, t1)
.opIsObjectNotCell:
return(BooleanTag, 0)
end)
macro loadPropertyAtVariableOffsetKnownNotInline(propertyOffset, objectAndStorage, tag, payload)
assert(macro (ok) bigteq propertyOffset, firstOutOfLineOffset, ok end)
negi propertyOffset
loadp JSObject::m_butterfly[objectAndStorage], objectAndStorage
loadi TagOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffset, 8], tag
loadi PayloadOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffset, 8], payload
end
macro loadPropertyAtVariableOffset(propertyOffset, objectAndStorage, tag, payload)
bilt propertyOffset, firstOutOfLineOffset, .isInline
loadp JSObject::m_butterfly[objectAndStorage], objectAndStorage
negi propertyOffset
jmp .ready
.isInline:
addp sizeof JSObject - (firstOutOfLineOffset - 2) * 8, objectAndStorage
.ready:
loadi TagOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffset, 8], tag
loadi PayloadOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffset, 8], payload
end
macro storePropertyAtVariableOffset(propertyOffsetAsInt, objectAndStorage, tag, payload)
bilt propertyOffsetAsInt, firstOutOfLineOffset, .isInline
loadp JSObject::m_butterfly[objectAndStorage], objectAndStorage
negi propertyOffsetAsInt
jmp .ready
.isInline:
addp sizeof JSObject - (firstOutOfLineOffset - 2) * 8, objectAndStorage
.ready:
storei tag, TagOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffsetAsInt, 8]
storei payload, PayloadOffset + (firstOutOfLineOffset - 2) * 8[objectAndStorage, propertyOffsetAsInt, 8]
end
# We only do monomorphic get_by_id caching for now, and we do not modify the
# opcode for own properties. We also allow for the cache to change anytime it fails,
# since ping-ponging is free. At best we get lucky and the get_by_id will continue
# to take fast path on the new cache. At worst we take slow path, which is what
# we would have been doing anyway. For prototype/unset properties, we will attempt to
# convert opcode into a get_by_id_proto_load/get_by_id_unset, respectively, after an
# execution counter hits zero.
llintOpWithMetadata(op_get_by_id_direct, OpGetByIdDirect, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
get(m_base, t0)
loadi OpGetByIdDirect::Metadata::m_structureID[t5], t1
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdDirectSlow)
loadi OpGetByIdDirect::Metadata::m_offset[t5], t2
bineq JSCell::m_structureID[t3], t1, .opGetByIdDirectSlow
loadPropertyAtVariableOffset(t2, t3, t0, t1)
valueProfile(OpGetByIdDirect, t5, t0, t1)
return(t0, t1)
.opGetByIdDirectSlow:
callSlowPath(_llint_slow_path_get_by_id_direct)
dispatch()
end)
llintOpWithMetadata(op_get_by_id, OpGetById, macro (size, get, dispatch, metadata, return)
metadata(t5, t0)
loadb OpGetById::Metadata::m_mode[t5], t1
get(m_base, t0)
.opGetByIdProtoLoad:
bbneq t1, constexpr GetByIdMode::ProtoLoad, .opGetByIdArrayLength
loadi OpGetById::Metadata::m_modeMetadata.protoLoadMode.structureID[t5], t1
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
loadis OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedOffset[t5], t2
bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
loadp OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedSlot[t5], t3
loadPropertyAtVariableOffset(t2, t3, t0, t1)
valueProfile(OpGetById, t5, t0, t1)
return(t0, t1)
.opGetByIdArrayLength:
bbneq t1, constexpr GetByIdMode::ArrayLength, .opGetByIdUnset
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
move t3, t2
arrayProfile(OpGetById::Metadata::m_modeMetadata.arrayLengthMode.arrayProfile, t2, t5, t0)
btiz t2, IsArray, .opGetByIdSlow
btiz t2, IndexingShapeMask, .opGetByIdSlow
loadp JSObject::m_butterfly[t3], t0
loadi -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], t0
bilt t0, 0, .opGetByIdSlow
valueProfile(OpGetById, t5, Int32Tag, t0)
return(Int32Tag, t0)
.opGetByIdUnset:
bbneq t1, constexpr GetByIdMode::Unset, .opGetByIdDefault
loadi OpGetById::Metadata::m_modeMetadata.unsetMode.structureID[t5], t1
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
valueProfile(OpGetById, t5, UndefinedTag, 0)
return(UndefinedTag, 0)
.opGetByIdDefault:
loadi OpGetById::Metadata::m_modeMetadata.defaultMode.structureID[t5], t1
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
loadis OpGetById::Metadata::m_modeMetadata.defaultMode.cachedOffset[t5], t2
bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
loadPropertyAtVariableOffset(t2, t3, t0, t1)
valueProfile(OpGetById, t5, t0, t1)
return(t0, t1)
.opGetByIdSlow:
callSlowPath(_llint_slow_path_get_by_id)
dispatch()
end)
llintOpWithMetadata(op_put_by_id, OpPutById, macro (size, get, dispatch, metadata, return)
writeBarrierOnOperands(size, get, m_base, m_value)
metadata(t5, t3)
get(m_base, t3)
loadConstantOrVariablePayload(size, t3, CellTag, t0, .opPutByIdSlow)
loadi JSCell::m_structureID[t0], t2
bineq t2, OpPutById::Metadata::m_oldStructureID[t5], .opPutByIdSlow
# At this point, we have:
# t5 -> metadata
# t2 -> currentStructureID
# t0 -> object base
# We will lose currentStructureID in the shenanigans below.
loadi OpPutById::Metadata::m_newStructureID[t5], t1
btiz t1, .opPutByIdNotTransition
# This is the transition case. t1 holds the new Structure*. 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
loadi OpPutById::Metadata::m_oldStructureID[t5], t2 # Need old structure again.
loadp StructureChain::m_vector[t3], t3
assert(macro (ok) btpnz t3, ok end)
loadp Structure::m_prototype[t2], t2
btpz t2, .opPutByIdTransitionChainDone
.opPutByIdTransitionChainLoop:
loadp [t3], t1
bineq t1, JSCell::m_structureID[t2], .opPutByIdSlow
addp 4, t3
loadp Structure::m_prototype[t1], t2
btpnz t2, .opPutByIdTransitionChainLoop
.opPutByIdTransitionChainDone:
loadi OpPutById::Metadata::m_newStructureID[t5], t1
.opPutByIdTransitionDirect:
storei t1, JSCell::m_structureID[t0]
get(m_value, t1)
loadConstantOrVariable(size, t1, t2, t3)
loadi OpPutById::Metadata::m_offset[t5], t1
storePropertyAtVariableOffset(t1, t0, t2, t3)
writeBarrierOnOperand(size, get, m_base)
dispatch()
.opPutByIdNotTransition:
# The only thing live right now is t0, which holds the base.
get(m_value, t1)
loadConstantOrVariable(size, t1, t2, t3)
loadi OpPutById::Metadata::m_offset[t5], t1
storePropertyAtVariableOffset(t1, t0, t2, t3)
dispatch()
.opPutByIdSlow:
callSlowPath(_llint_slow_path_put_by_id)
dispatch()
end)
llintOpWithMetadata(op_get_by_val, OpGetByVal, macro (size, get, dispatch, metadata, return)
metadata(t5, t2)
get(m_base, t2)
loadConstantOrVariablePayload(size, t2, CellTag, t0, .opGetByValSlow)
move t0, t2
arrayProfile(OpGetByVal::Metadata::m_arrayProfile, t2, t5, t1)
get(m_property, t3)
loadConstantOrVariablePayload(size, t3, Int32Tag, t1, .opGetByValSlow)
loadp JSObject::m_butterfly[t0], t3
andi IndexingShapeMask, t2
bieq t2, Int32Shape, .opGetByValIsContiguous
bineq t2, ContiguousShape, .opGetByValNotContiguous
.opGetByValIsContiguous:
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t3], .opGetByValSlow
loadi TagOffset[t3, t1, 8], t2
loadi PayloadOffset[t3, t1, 8], t1
jmp .opGetByValDone
.opGetByValNotContiguous:
bineq t2, DoubleShape, .opGetByValNotDouble
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t3], .opGetByValSlow
loadd [t3, t1, 8], ft0
bdnequn ft0, ft0, .opGetByValSlow
# FIXME: This could be massively optimized.
fd2ii ft0, t1, t2
get(m_dst, t0)
jmp .opGetByValNotEmpty
.opGetByValNotDouble:
subi ArrayStorageShape, t2
bia t2, SlowPutArrayStorageShape - ArrayStorageShape, .opGetByValSlow
biaeq t1, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t3], .opGetByValSlow
loadi ArrayStorage::m_vector + TagOffset[t3, t1, 8], t2
loadi ArrayStorage::m_vector + PayloadOffset[t3, t1, 8], t1
.opGetByValDone:
get(m_dst, t0)
bieq t2, EmptyValueTag, .opGetByValSlow
.opGetByValNotEmpty:
storei t2, TagOffset[cfr, t0, 8]
storei t1, PayloadOffset[cfr, t0, 8]
valueProfile(OpGetByVal, t5, t2, t1)
dispatch()
.opGetByValSlow:
callSlowPath(_llint_slow_path_get_by_val)
dispatch()
end)
macro putByValOp(opcodeName, opcodeStruct)
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)
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
writeBarrierOnOperands(size, get, m_base, m_value)
metadata(t5, t0)
get(m_base, t0)
loadConstantOrVariablePayload(size, t0, CellTag, t1, .opPutByValSlow)
move t1, t2
arrayProfile(%opcodeStruct%::Metadata::m_arrayProfile, t2, t5, t0)
get(m_property, t0)
loadConstantOrVariablePayload(size, t0, Int32Tag, t3, .opPutByValSlow)
loadp JSObject::m_butterfly[t1], t0
btinz t2, CopyOnWrite, .opPutByValSlow
andi IndexingShapeMask, t2
bineq t2, Int32Shape, .opPutByValNotInt32
contiguousPutByVal(
macro (operand, scratch, base, index)
loadConstantOrVariablePayload(size, operand, Int32Tag, scratch, .opPutByValSlow)
storei Int32Tag, TagOffset[base, index, 8]
storei scratch, PayloadOffset[base, index, 8]
end)
.opPutByValNotInt32:
bineq t2, DoubleShape, .opPutByValNotDouble
contiguousPutByVal(
macro (operand, scratch, base, index)
const tag = scratch
const payload = operand
loadConstantOrVariable2Reg(size, operand, tag, payload)
bineq tag, Int32Tag, .notInt
ci2d payload, ft0
jmp .ready
.notInt:
fii2d payload, tag, ft0
bdnequn ft0, ft0, .opPutByValSlow
.ready:
stored ft0, [base, index, 8]
end)
.opPutByValNotDouble:
bineq t2, ContiguousShape, .opPutByValNotContiguous
contiguousPutByVal(
macro (operand, scratch, base, index)
const tag = scratch
const payload = operand
loadConstantOrVariable2Reg(size, operand, tag, payload)
storei tag, TagOffset[base, index, 8]
storei payload, PayloadOffset[base, index, 8]
end)
.opPutByValNotContiguous:
bineq t2, ArrayStorageShape, .opPutByValSlow
biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t0], .opPutByValOutOfBounds
bieq ArrayStorage::m_vector + TagOffset[t0, t3, 8], EmptyValueTag, .opPutByValArrayStorageEmpty
.opPutByValArrayStorageStoreResult:
get(m_value, t2)
loadConstantOrVariable2Reg(size, t2, t1, t2)
storei t1, ArrayStorage::m_vector + TagOffset[t0, t3, 8]
storei t2, ArrayStorage::m_vector + PayloadOffset[t0, t3, 8]
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()
end)
end
putByValOp(put_by_val, OpPutByVal)
putByValOp(put_by_val_direct, OpPutByValDirect)
macro llintJumpTrueOrFalseOp(opcodeName, opcodeStruct, conditionOp)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_condition, t1)
loadConstantOrVariablePayload(size, t1, BooleanTag, t0, .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)
loadi TagOffset[cfr, t0, 8], t1
loadi PayloadOffset[cfr, t0, 8], t0
bineq t1, CellTag, .immediate
loadi JSCell::m_structureID[t0], t2
cellHandler(t2, JSCell::m_flags[t0], .target)
dispatch()
.target:
jump(m_targetLabel)
.immediate:
ori 1, t1
immediateHandler(t1, .target)
dispatch()
end)
end
equalNullJumpOp(jeq_null, OpJeqNull,
macro (structure, value, target)
btbz value, MasqueradesAsUndefined, .opJeqNullNotMasqueradesAsUndefined
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
bpeq Structure::m_globalObject[structure], t0, target
.opJeqNullNotMasqueradesAsUndefined:
end,
macro (value, target) bieq value, NullTag, 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) bineq value, NullTag, target end)
llintOpWithMetadata(op_jneq_ptr, OpJneqPtr, macro (size, get, dispatch, metadata, return)
get(m_value, t0)
getu(size, OpJneqPtr, m_specialPointer, t1)
loadp CodeBlock[cfr], t2
loadp CodeBlock::m_globalObject[t2], t2
bineq TagOffset[cfr, t0, 8], CellTag, .opJneqPtrBranch
loadp JSGlobalObject::m_specialPointers[t2, t1, 4], t1
bpeq PayloadOffset[cfr, t0, 8], t1, .opJneqPtrFallThrough
.opJneqPtrBranch:
metadata(t5, t2)
storeb 1, OpJneqPtr::Metadata::m_hasJumped[t5]
get(m_targetLabel, t0)
jumpImpl(t0)
.opJneqPtrFallThrough:
dispatch()
end)
macro compareUnsignedJumpOp(opcodeName, opcodeStruct, integerCompare)
llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
get(m_lhs, t2)
get(m_rhs, t3)
loadConstantOrVariable(size, t2, t0, t1)
loadConstantOrVariable2Reg(size, t3, t2, t3)
integerCompare(t1, t3, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
end)
end
macro compareUnsignedOp(opcodeName, opcodeStruct, integerCompareAndSet)
llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
get(m_rhs, t2)
get(m_lhs, t0)
loadConstantOrVariable(size, t2, t3, t1)
loadConstantOrVariable2Reg(size, t0, t2, t0)
integerCompareAndSet(t0, t1, t0)
return(BooleanTag, t0)
end)
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, t1)
loadConstantOrVariable2Reg(size, t3, t2, t3)
bineq t0, Int32Tag, .op1NotInt
bineq t2, Int32Tag, .op2NotInt
integerCompare(t1, t3, .jumpTarget)
dispatch()
.op1NotInt:
bia t0, LowestTag, .slow
bib t2, LowestTag, .op1NotIntOp2Double
bineq t2, Int32Tag, .slow
ci2d t3, ft1
jmp .op1NotIntReady
.op1NotIntOp2Double:
fii2d t3, t2, ft1
.op1NotIntReady:
fii2d t1, t0, ft0
doubleCompare(ft0, ft1, .jumpTarget)
dispatch()
.op2NotInt:
ci2d t1, ft0
bia t2, LowestTag, .slow
fii2d t3, t2, ft1
doubleCompare(ft0, ft1, .jumpTarget)
dispatch()
.jumpTarget:
jump(m_targetLabel)
.slow:
callSlowPath(_llint_slow_path_%opcodeName%)
nextInstruction()
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, t0)
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
bineq t1, Int32Tag, .opSwitchImmNotInt
subi SimpleJumpTable::min[t2], t0
biaeq t0, SimpleJumpTable::branchOffsets + VectorSizeOffset[t2], .opSwitchImmFallThrough
loadp SimpleJumpTable::branchOffsets + VectorBufferOffset[t2], t3
loadi [t3, t0, 4], t1
btiz t1, .opSwitchImmFallThrough
dispatchIndirect(t1)
.opSwitchImmNotInt:
bib t1, LowestTag, .opSwitchImmSlow # Go to slow path 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, t0)
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
bineq t1, CellTag, .opSwitchCharFallThrough
bbneq JSCell::m_type[t0], StringType, .opSwitchCharFallThrough
bineq JSString::m_length[t0], 1, .opSwitchCharFallThrough
loadp JSString::m_value[t0], t0
btpz t0, .opSwitchOnRope
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
loadi [t2, t0, 4], t1
btiz t1, .opSwitchCharFallThrough
dispatchIndirect(t1)
.opSwitchCharFallThrough:
jump(m_defaultOffset)
.opSwitchOnRope:
callSlowPath(_llint_slow_path_switch_char)
nextInstruction()
end)
macro arrayProfileForCall(opcodeStruct, getu)
getu(m_argv, t3)
negi t3
bineq ThisArgumentOffset + TagOffset[cfr, t3, 8], CellTag, .done
loadi ThisArgumentOffset + PayloadOffset[cfr, t3, 8], t0
loadi JSCell::m_structureID[t0], t0
storei t0, %opcodeStruct%::Metadata::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.callee[t5], t2
loadConstantOrVariablePayload(size, t0, CellTag, t3, .opCallSlow)
bineq t3, t2, .opCallSlow
getu(size, opcodeStruct, m_argv, t3)
lshifti 3, t3
negi t3
addp cfr, t3 # t3 contains the new value of cfr
storei t2, Callee + PayloadOffset[t3]
getu(size, opcodeStruct, m_argc, t2)
storei PC, ArgumentCount + TagOffset[cfr]
storei t2, ArgumentCount + PayloadOffset[t3]
storei CellTag, Callee + TagOffset[t3]
move t3, sp
prepareCall(%opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
callTargetFunction(size, opcodeStruct, dispatch, %opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], JSEntryPtrTag)
.opCallSlow:
slowPathForCall(size, opcodeStruct, dispatch, slowPath, prepareCall)
end)
end
llintOp(op_ret, OpRet, macro (size, get, dispatch)
checkSwitchToJITForEpilogue()
get(m_value, t2)
loadConstantOrVariable(size, t2, t1, t0)
doReturn()
end)
llintOpWithReturn(op_to_primitive, OpToPrimitive, macro (size, get, dispatch, return)
get(m_src, t2)
loadConstantOrVariable(size, t2, t1, t0)
bineq t1, CellTag, .opToPrimitiveIsImm
bbaeq JSCell::m_type[t0], ObjectType, .opToPrimitiveSlowCase
.opToPrimitiveIsImm:
return(t1, 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 + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
restoreCalleeSavesFromVMEntryFrameCalleeSavesBuffer(t3, t0)
loadp VM::callFrameForCatch[t3], cfr
storep 0, VM::callFrameForCatch[t3]
restoreStackPointerAfterCall()
# restore metadataTable since we don't restore callee saves for CLoop during unwinding
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_metadata[t1], metadataTable
loadi VM::targetInterpreterPCForThrow[t3], 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 Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
loadp VM::m_exception[t3], t0
storep 0, VM::m_exception[t3]
get(size, OpCatch, m_exception, t2)
storei t0, PayloadOffset[cfr, t2, 8]
storei CellTag, TagOffset[cfr, t2, 8]
loadi Exception::m_value + TagOffset[t0], t1
loadi Exception::m_value + PayloadOffset[t0], t0
get(size, OpCatch, m_thrownValue, t2)
storei t0, PayloadOffset[cfr, t2, 8]
storei t1, TagOffset[cfr, t2, 8]
traceExecution() # This needs to be here because we don't want to clobber t0, t1, t2, t3 above.
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)
loadi TagOffset[cfr, t0, 8], t1
loadi PayloadOffset[cfr, t0, 8], t0
doReturn()
end)
op(llint_throw_from_slow_path_trampoline, macro()
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
andp MarkedBlockMask, t1
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t1], t1
copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(t1, t2)
jmp VM::targetMachinePCForThrow[t1]
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]
loadi Callee + PayloadOffset[cfr], t1
// Callee is still in t1 for code below
if X86 or X86_WIN
subp 8, sp # align stack pointer
andp MarkedBlockMask, t1
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t1], t3
storep cfr, VM::topCallFrame[t3]
move cfr, a0 # a0 = ecx
storep a0, [sp]
loadi Callee + PayloadOffset[cfr], t1
loadp JSFunction::m_executable[t1], t1
checkStackPointerAlignment(t3, 0xdead0001)
call executableOffsetToFunction[t1]
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
addp 8, sp
elsif ARMv7 or C_LOOP or MIPS
if MIPS
# calling convention says to save stack space for 4 first registers in
# all cases. To match our 16-byte alignment, that means we need to
# take 24 bytes
subp 24, sp
else
subp 8, sp # align stack pointer
end
# t1 already contains the Callee.
andp MarkedBlockMask, t1
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t1], t1
storep cfr, VM::topCallFrame[t1]
move cfr, a0
loadi Callee + PayloadOffset[cfr], t1
loadp JSFunction::m_executable[t1], t1
checkStackPointerAlignment(t3, 0xdead0001)
if C_LOOP
cloopCallNative executableOffsetToFunction[t1]
else
call executableOffsetToFunction[t1]
end
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
if MIPS
addp 24, sp
else
addp 8, sp
end
else
error
end
btpnz VM::m_exception[t3], .handleException
functionEpilogue()
ret
.handleException:
if X86 or X86_WIN
subp 8, sp # align stack pointer
end
storep cfr, VM::topCallFrame[t3]
jmp _llint_throw_from_slow_path_trampoline
end
macro internalFunctionCallTrampoline(offsetOfFunction)
functionPrologue()
storep 0, CodeBlock[cfr]
loadi Callee + PayloadOffset[cfr], t1
// Callee is still in t1 for code below
if X86 or X86_WIN
subp 8, sp # align stack pointer
andp MarkedBlockMask, t1
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t1], t3
storep cfr, VM::topCallFrame[t3]
move cfr, a0 # a0 = ecx
storep a0, [sp]
loadi Callee + PayloadOffset[cfr], t1
checkStackPointerAlignment(t3, 0xdead0001)
call offsetOfFunction[t1]
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
addp 8, sp
elsif ARMv7 or C_LOOP or MIPS
subp 8, sp # align stack pointer
# t1 already contains the Callee.
andp MarkedBlockMask, t1
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t1], t1
storep cfr, VM::topCallFrame[t1]
move cfr, a0
loadi Callee + PayloadOffset[cfr], t1
checkStackPointerAlignment(t3, 0xdead0001)
if C_LOOP
cloopCallNative offsetOfFunction[t1]
else
call offsetOfFunction[t1]
end
loadp Callee + PayloadOffset[cfr], t3
andp MarkedBlockMask, t3
loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
addp 8, sp
else
error
end
btpnz VM::m_exception[t3], .handleException
functionEpilogue()
ret
.handleException:
if X86 or X86_WIN
subp 8, sp # align stack pointer
end
storep cfr, VM::topCallFrame[t3]
jmp _llint_throw_from_slow_path_trampoline
end
macro varInjectionCheck(slowPath)
loadp CodeBlock[cfr], t0
loadp CodeBlock::m_globalObject[t0], t0
loadp JSGlobalObject::m_varInjectionWatchpoint[t0], t0
bbeq WatchpointSet::m_state[t0], IsInvalidated, slowPath
end
llintOpWithMetadata(op_resolve_scope, OpResolveScope, macro (size, get, dispatch, metadata, return)
macro getConstantScope(dst)
loadp OpResolveScope::Metadata::m_constantScope[t5], dst
end
macro returnConstantScope()
getConstantScope(t0)
return(CellTag, 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)
loadp PayloadOffset[cfr, t0, 8], t0
btiz t2, .resolveScopeLoopEnd
.resolveScopeLoop:
loadp JSScope::m_next[t0], t0
subi 1, t2
btinz t2, .resolveScopeLoop
.resolveScopeLoopEnd:
return(CellTag, t0)
end
metadata(t5, t0)
loadi OpResolveScope::Metadata::m_resolveType[t5], t0
#rGlobalProperty:
bineq t0, GlobalProperty, .rGlobalVar
getConstantScope(t0)
globalLexicalBindingEpochCheck(.rDynamic, t0, t2)
return(CellTag, 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)
getConstantScope(t0)
globalLexicalBindingEpochCheck(.rDynamic, t0, t2)
return(CellTag, t0)
.rGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .rGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.rDynamic)
returnConstantScope()
.rGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .rClosureVarWithVarInjectionChecks
varInjectionCheck(.rDynamic)
returnConstantScope()
.rClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .rDynamic
varInjectionCheck(.rDynamic)
resolveScope()
.rDynamic:
callSlowPath(_slow_path_resolve_scope)
dispatch()
end)
macro loadWithStructureCheck(opcodeStruct, get, operand, slowPath)
get(m_scope, t0)
loadp PayloadOffset[cfr, t0, 8], t0
loadp %opcodeStruct%::Metadata::m_structure[t5], t1
bineq JSCell::m_structureID[t0], t1, slowPath
end
llintOpWithMetadata(op_get_from_scope, OpGetFromScope, macro (size, get, dispatch, metadata, return)
macro getProperty()
loadp OpGetFromScope::Metadata::m_operand[t5], t3
loadPropertyAtVariableOffset(t3, t0, t1, t2)
valueProfile(OpGetFromScope, t5, t1, t2)
return(t1, t2)
end
macro getGlobalVar(tdzCheckIfNecessary)
loadp OpGetFromScope::Metadata::m_operand[t5], t0
loadp TagOffset[t0], t1
loadp PayloadOffset[t0], t2
tdzCheckIfNecessary(t1)
valueProfile(OpGetFromScope, t5, t1, t2)
return(t1, t2)
end
macro getClosureVar()
loadp OpGetFromScope::Metadata::m_operand[t5], t3
loadp JSLexicalEnvironment_variables + TagOffset[t0, t3, 8], t1
loadp JSLexicalEnvironment_variables + PayloadOffset[t0, t3, 8], t2
valueProfile(OpGetFromScope, t5, t1, t2)
return(t1, t2)
end
metadata(t5, t0)
loadi OpGetFromScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
andi ResolveTypeMask, t0
#gGlobalProperty:
bineq t0, GlobalProperty, .gGlobalVar
loadWithStructureCheck(OpGetFromScope, get, scope, .gDynamic)
getProperty()
.gGlobalVar:
bineq t0, GlobalVar, .gGlobalLexicalVar
getGlobalVar(macro(t) end)
.gGlobalLexicalVar:
bineq t0, GlobalLexicalVar, .gClosureVar
getGlobalVar(
macro(tag)
bieq tag, EmptyValueTag, .gDynamic
end)
.gClosureVar:
bineq t0, ClosureVar, .gGlobalPropertyWithVarInjectionChecks
loadVariable(get, m_scope, t2, t1, t0)
getClosureVar()
.gGlobalPropertyWithVarInjectionChecks:
bineq t0, GlobalPropertyWithVarInjectionChecks, .gGlobalVarWithVarInjectionChecks
loadWithStructureCheck(OpGetFromScope, get, scope, .gDynamic)
getProperty()
.gGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .gGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.gDynamic)
getGlobalVar(macro(t) end)
.gGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .gClosureVarWithVarInjectionChecks
varInjectionCheck(.gDynamic)
getGlobalVar(
macro(tag)
bieq tag, EmptyValueTag, .gDynamic
end)
.gClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .gDynamic
varInjectionCheck(.gDynamic)
loadVariable(get, m_scope, t2, t1, 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, t3)
loadp OpPutToScope::Metadata::m_operand[t5], t1
storePropertyAtVariableOffset(t1, t0, t2, t3)
end
macro putGlobalVariable()
get(m_value, t0)
loadConstantOrVariable(size, t0, t1, t2)
loadp OpPutToScope::Metadata::m_watchpointSet[t5], t3
notifyWrite(t3, .pDynamic)
loadp OpPutToScope::Metadata::m_operand[t5], t0
storei t1, TagOffset[t0]
storei t2, PayloadOffset[t0]
end
macro putClosureVar()
get(m_value, t1)
loadConstantOrVariable(size, t1, t2, t3)
loadp OpPutToScope::Metadata::m_operand[t5], t1
storei t2, JSLexicalEnvironment_variables + TagOffset[t0, t1, 8]
storei t3, JSLexicalEnvironment_variables + PayloadOffset[t0, t1, 8]
end
macro putLocalClosureVar()
get(m_value, t1)
loadConstantOrVariable(size, t1, t2, t3)
loadp OpPutToScope::Metadata::m_watchpointSet[t5], t1
btpz t1, .noVariableWatchpointSet
notifyWrite(t1, .pDynamic)
.noVariableWatchpointSet:
loadp OpPutToScope::Metadata::m_operand[t5], t1
storei t2, JSLexicalEnvironment_variables + TagOffset[t0, t1, 8]
storei t3, JSLexicalEnvironment_variables + PayloadOffset[t0, t1, 8]
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, t2, t1, t0)
putLocalClosureVar()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalProperty:
bineq t0, GlobalProperty, .pGlobalVar
loadWithStructureCheck(OpPutToScope, get, scope, .pDynamic)
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
putGlobalVariable()
writeBarrierOnGlobalLexicalEnvironment(size, get, m_value)
dispatch()
.pClosureVar:
bineq t0, ClosureVar, .pGlobalPropertyWithVarInjectionChecks
loadVariable(get, m_scope, t2, t1, t0)
putClosureVar()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalPropertyWithVarInjectionChecks:
bineq t0, GlobalPropertyWithVarInjectionChecks, .pGlobalVarWithVarInjectionChecks
loadWithStructureCheck(OpPutToScope, get, scope, .pDynamic)
putProperty()
writeBarrierOnOperands(size, get, m_scope, m_value)
dispatch()
.pGlobalVarWithVarInjectionChecks:
bineq t0, GlobalVarWithVarInjectionChecks, .pGlobalLexicalVarWithVarInjectionChecks
varInjectionCheck(.pDynamic)
putGlobalVariable()
writeBarrierOnGlobalObject(size, get, m_value)
dispatch()
.pGlobalLexicalVarWithVarInjectionChecks:
bineq t0, GlobalLexicalVarWithVarInjectionChecks, .pClosureVarWithVarInjectionChecks
varInjectionCheck(.pDynamic)
putGlobalVariable()
writeBarrierOnGlobalLexicalEnvironment(size, get, m_value)
dispatch()
.pClosureVarWithVarInjectionChecks:
bineq t0, ClosureVarWithVarInjectionChecks, .pModuleVar
varInjectionCheck(.pDynamic)
loadVariable(get, m_scope, t2, t1, 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)
get(m_arguments, t0)
loadi PayloadOffset[cfr, t0, 8], t0
getu(size, OpGetFromArguments, m_index, t1)
loadi DirectArguments_storage + TagOffset[t0, t1, 8], t2
loadi DirectArguments_storage + PayloadOffset[t0, t1, 8], t3
return(t2, t3)
end)
llintOp(op_put_to_arguments, OpPutToArguments, macro (size, get, dispatch)
writeBarrierOnOperands(size, get, m_arguments, m_value)
get(m_arguments, t0)
loadi PayloadOffset[cfr, t0, 8], t0
get(m_value, t1)
loadConstantOrVariable(size, t1, t2, t3)
getu(size, OpPutToArguments, m_index, t1)
storei t2, DirectArguments_storage + TagOffset[t0, t1, 8]
storei t3, DirectArguments_storage + PayloadOffset[t0, t1, 8]
dispatch()
end)
llintOpWithReturn(op_get_parent_scope, OpGetParentScope, macro (size, get, dispatch, return)
get(m_scope, t0)
loadp PayloadOffset[cfr, t0, 8], t0
loadp JSScope::m_next[t0], t0
return(CellTag, t0)
end)
llintOpWithMetadata(op_profile_type, OpProfileType, macro (size, get, dispatch, metadata, return)
loadp CodeBlock[cfr], t1
loadp CodeBlock::m_poisonedVM[t1], t1
unpoison(_g_CodeBlockPoison, t1, t2)
# t1 is holding the pointer to the typeProfilerLog.
loadp VM::m_typeProfilerLog[t1], t1
# t0 is holding the payload, t5 is holding the tag.
get(m_targetVirtualRegister, t2)
loadConstantOrVariable(size, t2, t5, t0)
bieq t5, EmptyValueTag, .opProfileTypeDone
metadata(t3, t2)
# t2 is holding the pointer to the current log entry.
loadp TypeProfilerLog::m_currentLogEntryPtr[t1], t2
# Store the JSValue onto the log entry.
storei t5, TypeProfilerLog::LogEntry::value + TagOffset[t2]
storei t0, TypeProfilerLog::LogEntry::value + PayloadOffset[t2]
# Store the TypeLocation onto the log entry.
loadp OpProfileType::Metadata::m_typeLocation[t3], t3
storep t3, TypeProfilerLog::LogEntry::location[t2]
bieq t5, CellTag, .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
loadi BasicBlockLocation::m_executionCount[t0], t1
baddio 1, t1, .done
storei t1, BasicBlockLocation::m_executionCount[t0]
.done:
dispatch()
end)
llintOpWithReturn(op_get_rest_length, OpGetRestLength, macro (size, get, dispatch, return)
loadi PayloadOffset + ArgumentCount[cfr], t0
subi 1, t0
getu(size, OpGetRestLength, m_numParametersToSkip, t1)
bilteq t0, t1, .storeZero
subi t1, t0
jmp .finish
.storeZero:
move 0, t0
.finish:
return(Int32Tag, t0)
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 + PayloadOffset[cfr], t1
storep t1, ShadowChicken::Packet::callee[t0]
get(m_scope, t1)
loadi PayloadOffset[cfr, t1, 8], 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, t3, t2, t1)
storei t2, TagOffset + ShadowChicken::Packet::thisValue[t0]
storei t1, PayloadOffset + ShadowChicken::Packet::thisValue[t0]
get(m_scope, t1)
loadi PayloadOffset[cfr, t1, 8], 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)