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compiler.h
3104 lines (2785 loc) · 102 KB
/
compiler.h
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// breaker::Compiler
//
// This compiler parses railgun::opcodes and emits native code.
// Some primitive operations and branch operations are
// emitted as raw native code,
// and basic complex opcodes are emitted as call to stub function, that is,
// Context Threading JIT.
//
// Stub function implementations are in stub.h
#ifndef IV_LV5_BREAKER_COMPILER_H_
#define IV_LV5_BREAKER_COMPILER_H_
#include <iv/debug.h>
#include <iv/byteorder.h>
#include <iv/lv5/jsglobal.h>
#include <iv/lv5/breaker/fwd.h>
#include <iv/lv5/breaker/helper.h>
#include <iv/lv5/railgun/railgun.h>
#include <iv/lv5/breaker/assembler.h>
#include <iv/lv5/breaker/jsfunction.h>
#include <iv/lv5/breaker/type.h>
#include <iv/lv5/breaker/mono_ic.h>
#include <iv/lv5/breaker/poly_ic.h>
#include <iv/lv5/breaker/stub.h>
namespace iv {
namespace lv5 {
namespace breaker {
static const std::size_t kEncodeRotateN =
core::math::CTZ64(lv5::detail::jsval64::kDoubleOffset);
class Compiler {
public:
// introducing railgun to this scope
typedef railgun::Instruction Instruction;
typedef railgun::OP OP;
class JumpInfo {
public:
JumpInfo(std::size_t c, bool handled = false)
: counter(c),
offset(0),
exception_handled(handled) {
}
JumpInfo()
: counter(0),
offset(0),
exception_handled(false) {
}
std::size_t counter;
std::size_t offset;
bool exception_handled;
};
typedef std::unordered_map<railgun::Code*, std::size_t> EntryPointMap;
typedef std::unordered_map<uint32_t, JumpInfo> JumpMap;
typedef std::unordered_map<std::size_t,
Assembler::RepatchSite> UnresolvedAddressMap;
typedef std::vector<
std::pair<Assembler::RepatchSite, std::size_t> > RepatchSites;
typedef std::vector<railgun::Code*> Codes;
typedef std::unordered_map<const Instruction*, std::size_t> HandlerLinks;
static const int kJSValSize = sizeof(JSVal);
static const int32_t kInvalidUsedOffset = INT32_MIN;
explicit Compiler(Context* ctx, railgun::Code* top)
: ctx_(ctx),
top_(top),
code_(NULL),
asm_(new Assembler),
native_code_(new NativeCode(asm_)),
jump_map_(),
entry_points_(),
unresolved_address_map_(),
handler_links_(),
codes_(),
counter_(0),
previous_instr_(NULL),
last_used_(kInvalidUsedOffset),
last_used_candidate_(),
type_record_() {
top_->core_data()->set_native_code(native_code_);
}
static uint64_t RotateLeft64(uint64_t val, uint64_t amount) {
return (val << amount) | (val >> (64 - amount));
}
~Compiler() {
// Compilation is finished.
// Link jumps / calls and set each entry point to Code.
asm_->ready();
// link entry points
for (EntryPointMap::const_iterator it = entry_points_.begin(),
last = entry_points_.end(); it != last; ++it) {
it->first->set_executable(asm_->GainExecutableByOffset(it->second));
}
// Repatch phase
// link jump subroutine
for (UnresolvedAddressMap::const_iterator
it = unresolved_address_map_.begin(),
last = unresolved_address_map_.end();
it != last; ++it) {
uint64_t ptr =
core::BitCast<uint64_t>(asm_->GainExecutableByOffset(it->first));
assert(ptr % 2 == 0);
// encode ptr value to JSVal invalid number
// double offset value is
// 1000000000000000000000000000000000000000000000000
ptr += 0x1;
const uint64_t result = RotateLeft64(ptr, kEncodeRotateN);
it->second.Repatch(asm_, result);
}
// link exception handlers
for (Codes::const_iterator it = codes_.begin(),
last = codes_.end(); it != last; ++it) {
railgun::Code* code = *it;
const Instruction* first_instr = code->begin();
railgun::ExceptionTable& table = code->exception_table();
for (railgun::ExceptionTable::iterator it = table.begin(),
last = table.end(); it != last; ++it) {
railgun::Handler& handler = *it;
const Instruction* begin = first_instr + handler.begin();
const Instruction* end = first_instr + handler.end();
assert(handler_links_.find(begin) != handler_links_.end());
assert(handler_links_.find(end) != handler_links_.end());
handler.set_program_counter_begin(
asm_->GainExecutableByOffset(handler_links_.find(begin)->second));
handler.set_program_counter_end(
asm_->GainExecutableByOffset(handler_links_.find(end)->second));
}
}
}
void Initialize(railgun::Code* code) {
code_ = code;
codes_.push_back(code);
jump_map_.clear();
entry_points_.insert(std::make_pair(code, asm_->size()));
previous_instr_ = NULL;
kill_last_used();
type_record_.Init(code);
}
void Compile(railgun::Code* code) {
Initialize(code);
ScanJumps();
Main();
}
// scan jump target for setting labels
void ScanJumps() {
// jump opcodes
// IF_FALSE
// IF_TRUE
// JUMP_SUBROUTINE
// JUMP_BY
// FORIN_SETUP
// FORIN_ENUMERATE
namespace r = railgun;
const Instruction* first_instr = code_->begin();
for (const Instruction* instr = code_->begin(),
*last = code_->end(); instr != last;) {
const uint32_t opcode = instr->GetOP();
const uint32_t length = r::kOPLength[opcode];
const int32_t index = instr - first_instr;
if (r::OP::IsJump(opcode)) {
const int32_t jump = instr[1].jump.to;
const uint32_t to = index + jump;
jump_map_.insert(std::make_pair(to, JumpInfo(counter_++)));
}
std::advance(instr, length);
}
// and handlers table
const r::ExceptionTable& table = code_->exception_table();
for (r::ExceptionTable::const_iterator it = table.begin(),
last = table.end(); it != last; ++it) {
// should override (because handled option is true)
const r::Handler& handler = *it;
jump_map_[handler.begin()] = JumpInfo(counter_++, true);
jump_map_[handler.end()] = JumpInfo(counter_++, true);
}
}
// Returns previous and instr are in basic block
bool SplitBasicBlock(const Instruction* previous, const Instruction* instr) {
const int32_t index = instr - code_->begin();
const JumpMap::iterator it = jump_map_.find(index);
if (it != jump_map_.end()) {
// this opcode is jump target
// split basic block
asm_->L(MakeLabel(it->second.counter).c_str());
if (it->second.exception_handled) {
// store handler range
handler_links_.insert(std::make_pair(instr, asm_->size()));
}
return false;
}
return true;
}
void Main() {
namespace r = railgun;
// generate local label scope
const Assembler::LocalLabelScope local_label_scope(asm_);
// emit prologue
// general storage space
// We can access this space by qword[rsp + k64Size * 0] a.k.a. qword[rsp]
asm_->push(r12);
asm_->sub(qword[r14 + offsetof(Frame, ret)], k64Size * kStackPayload);
const Instruction* total_first_instr = code_->core_data()->data()->data();
const Instruction* previous = NULL;
const Instruction* instr = code_->begin();
for (const Instruction* last = code_->end(); instr != last;) {
const uint32_t opcode = instr->GetOP();
const uint32_t length = r::kOPLength[opcode];
set_last_used_candidate(kInvalidUsedOffset);
const bool in_basic_block = SplitBasicBlock(previous, instr);
if (!in_basic_block) {
set_previous_instr(NULL);
kill_last_used();
type_record_.Clear();
} else {
set_previous_instr(previous);
}
native_code()->AttachBytecodeOffset(asm_->size(), instr - total_first_instr);
switch (opcode) {
case r::OP::NOP:
EmitNOP(instr);
break;
case r::OP::ENTER:
EmitENTER(instr);
break;
case r::OP::MV:
EmitMV(instr);
break;
case r::OP::UNARY_POSITIVE:
EmitUNARY_POSITIVE(instr);
break;
case r::OP::UNARY_NEGATIVE:
EmitUNARY_NEGATIVE(instr);
break;
case r::OP::UNARY_NOT:
EmitUNARY_NOT(instr);
break;
case r::OP::UNARY_BIT_NOT:
EmitUNARY_BIT_NOT(instr);
break;
case r::OP::BINARY_ADD:
EmitBINARY_ADD(instr);
break;
case r::OP::BINARY_SUBTRACT:
EmitBINARY_SUBTRACT(instr);
break;
case r::OP::BINARY_MULTIPLY:
EmitBINARY_MULTIPLY(instr);
break;
case r::OP::BINARY_DIVIDE:
EmitBINARY_DIVIDE(instr);
break;
case r::OP::BINARY_MODULO:
EmitBINARY_MODULO(instr);
break;
case r::OP::BINARY_LSHIFT:
EmitBINARY_LSHIFT(instr);
break;
case r::OP::BINARY_RSHIFT:
EmitBINARY_RSHIFT(instr);
break;
case r::OP::BINARY_RSHIFT_LOGICAL:
EmitBINARY_RSHIFT_LOGICAL(instr);
break;
case r::OP::BINARY_LT:
EmitBINARY_LT(instr);
break;
case r::OP::BINARY_LTE:
EmitBINARY_LTE(instr);
break;
case r::OP::BINARY_GT:
EmitBINARY_GT(instr);
break;
case r::OP::BINARY_GTE:
EmitBINARY_GTE(instr);
break;
case r::OP::BINARY_INSTANCEOF:
EmitBINARY_INSTANCEOF(instr);
break;
case r::OP::BINARY_IN:
EmitBINARY_IN(instr);
break;
case r::OP::BINARY_EQ:
EmitBINARY_EQ(instr);
break;
case r::OP::BINARY_STRICT_EQ:
EmitBINARY_STRICT_EQ(instr);
break;
case r::OP::BINARY_NE:
EmitBINARY_NE(instr);
break;
case r::OP::BINARY_STRICT_NE:
EmitBINARY_STRICT_NE(instr);
break;
case r::OP::BINARY_BIT_AND:
EmitBINARY_BIT_AND(instr);
break;
case r::OP::BINARY_BIT_XOR:
EmitBINARY_BIT_XOR(instr);
break;
case r::OP::BINARY_BIT_OR:
EmitBINARY_BIT_OR(instr);
break;
case r::OP::RETURN:
EmitRETURN(instr);
break;
case r::OP::THROW:
EmitTHROW(instr);
break;
case r::OP::POP_ENV:
EmitPOP_ENV(instr);
break;
case r::OP::WITH_SETUP:
EmitWITH_SETUP(instr);
break;
case r::OP::RETURN_SUBROUTINE:
EmitRETURN_SUBROUTINE(instr);
break;
case r::OP::DEBUGGER:
EmitDEBUGGER(instr);
break;
case r::OP::LOAD_REGEXP:
EmitLOAD_REGEXP(instr);
break;
case r::OP::LOAD_OBJECT:
EmitLOAD_OBJECT(instr);
break;
case r::OP::LOAD_ELEMENT:
EmitLOAD_ELEMENT(instr);
break;
case r::OP::STORE_ELEMENT:
EmitSTORE_ELEMENT(instr);
break;
case r::OP::DELETE_ELEMENT:
EmitDELETE_ELEMENT(instr);
break;
case r::OP::INCREMENT_ELEMENT:
EmitINCREMENT_ELEMENT(instr);
break;
case r::OP::DECREMENT_ELEMENT:
EmitDECREMENT_ELEMENT(instr);
break;
case r::OP::POSTFIX_INCREMENT_ELEMENT:
EmitPOSTFIX_INCREMENT_ELEMENT(instr);
break;
case r::OP::POSTFIX_DECREMENT_ELEMENT:
EmitPOSTFIX_DECREMENT_ELEMENT(instr);
break;
case r::OP::TO_NUMBER:
EmitTO_NUMBER(instr);
break;
case r::OP::TO_PRIMITIVE_AND_TO_STRING:
EmitTO_PRIMITIVE_AND_TO_STRING(instr);
break;
case r::OP::CONCAT:
EmitCONCAT(instr);
break;
case r::OP::RAISE:
EmitRAISE(instr);
break;
case r::OP::TYPEOF:
EmitTYPEOF(instr);
break;
case r::OP::STORE_OBJECT_INDEXED:
EmitSTORE_OBJECT_INDEXED(instr);
break;
case r::OP::STORE_OBJECT_DATA:
EmitSTORE_OBJECT_DATA(instr);
break;
case r::OP::STORE_OBJECT_GET:
EmitSTORE_OBJECT_GET(instr);
break;
case r::OP::STORE_OBJECT_SET:
EmitSTORE_OBJECT_SET(instr);
break;
case r::OP::LOAD_PROP:
EmitLOAD_PROP(instr);
break;
case r::OP::LOAD_PROP_GENERIC:
case r::OP::LOAD_PROP_OWN:
case r::OP::LOAD_PROP_PROTO:
case r::OP::LOAD_PROP_CHAIN:
UNREACHABLE();
break;
case r::OP::STORE_PROP:
EmitSTORE_PROP(instr);
break;
case r::OP::STORE_PROP_GENERIC:
UNREACHABLE();
break;
case r::OP::DELETE_PROP:
EmitDELETE_PROP(instr);
break;
case r::OP::INCREMENT_PROP:
EmitINCREMENT_PROP(instr);
break;
case r::OP::DECREMENT_PROP:
EmitDECREMENT_PROP(instr);
break;
case r::OP::POSTFIX_INCREMENT_PROP:
EmitPOSTFIX_INCREMENT_PROP(instr);
break;
case r::OP::POSTFIX_DECREMENT_PROP:
EmitPOSTFIX_DECREMENT_PROP(instr);
break;
case r::OP::LOAD_CONST:
EmitLOAD_CONST(instr);
break;
case r::OP::JUMP_BY:
EmitJUMP_BY(instr);
break;
case r::OP::JUMP_SUBROUTINE:
EmitJUMP_SUBROUTINE(instr);
break;
case r::OP::IF_FALSE:
EmitIF_FALSE(instr);
break;
case r::OP::IF_TRUE:
EmitIF_TRUE(instr);
break;
case r::OP::IF_FALSE_BINARY_LT:
EmitBINARY_LT(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_LT:
EmitBINARY_LT(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_LTE:
EmitBINARY_LTE(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_LTE:
EmitBINARY_LTE(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_GT:
EmitBINARY_GT(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_GT:
EmitBINARY_GT(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_GTE:
EmitBINARY_GTE(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_GTE:
EmitBINARY_GTE(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_INSTANCEOF:
EmitBINARY_INSTANCEOF(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_INSTANCEOF:
EmitBINARY_INSTANCEOF(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_IN:
EmitBINARY_IN(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_IN:
EmitBINARY_IN(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_EQ:
EmitBINARY_EQ(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_EQ:
EmitBINARY_EQ(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_NE:
EmitBINARY_NE(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_NE:
EmitBINARY_NE(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_STRICT_EQ:
EmitBINARY_STRICT_EQ(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_STRICT_EQ:
EmitBINARY_STRICT_EQ(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_STRICT_NE:
EmitBINARY_STRICT_NE(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_STRICT_NE:
EmitBINARY_STRICT_NE(instr, OP::IF_TRUE);
break;
case r::OP::IF_FALSE_BINARY_BIT_AND:
EmitBINARY_BIT_AND(instr, OP::IF_FALSE);
break;
case r::OP::IF_TRUE_BINARY_BIT_AND:
EmitBINARY_BIT_AND(instr, OP::IF_TRUE);
break;
case r::OP::FORIN_SETUP:
EmitFORIN_SETUP(instr);
break;
case r::OP::FORIN_ENUMERATE:
EmitFORIN_ENUMERATE(instr);
break;
case r::OP::FORIN_LEAVE:
EmitFORIN_LEAVE(instr);
break;
case r::OP::TRY_CATCH_SETUP:
EmitTRY_CATCH_SETUP(instr);
break;
case r::OP::LOAD_NAME:
EmitLOAD_NAME(instr);
break;
case r::OP::STORE_NAME:
EmitSTORE_NAME(instr);
break;
case r::OP::DELETE_NAME:
EmitDELETE_NAME(instr);
break;
case r::OP::INCREMENT_NAME:
EmitINCREMENT_NAME(instr);
break;
case r::OP::DECREMENT_NAME:
EmitDECREMENT_NAME(instr);
break;
case r::OP::POSTFIX_INCREMENT_NAME:
EmitPOSTFIX_INCREMENT_NAME(instr);
break;
case r::OP::POSTFIX_DECREMENT_NAME:
EmitPOSTFIX_DECREMENT_NAME(instr);
break;
case r::OP::TYPEOF_NAME:
EmitTYPEOF_NAME(instr);
break;
case r::OP::LOAD_GLOBAL:
EmitLOAD_GLOBAL(instr);
break;
case r::OP::LOAD_GLOBAL_DIRECT:
EmitLOAD_GLOBAL_DIRECT(instr);
break;
case r::OP::STORE_GLOBAL:
EmitSTORE_GLOBAL(instr);
break;
case r::OP::STORE_GLOBAL_DIRECT:
EmitSTORE_GLOBAL_DIRECT(instr);
break;
case r::OP::DELETE_GLOBAL:
EmitDELETE_GLOBAL(instr);
break;
case r::OP::TYPEOF_GLOBAL:
EmitTYPEOF_GLOBAL(instr);
break;
case r::OP::LOAD_HEAP:
EmitLOAD_HEAP(instr);
break;
case r::OP::STORE_HEAP:
EmitSTORE_HEAP(instr);
break;
case r::OP::DELETE_HEAP:
EmitDELETE_HEAP(instr);
break;
case r::OP::INCREMENT_HEAP:
EmitINCREMENT_HEAP(instr);
break;
case r::OP::DECREMENT_HEAP:
EmitDECREMENT_HEAP(instr);
break;
case r::OP::POSTFIX_INCREMENT_HEAP:
EmitPOSTFIX_INCREMENT_HEAP(instr);
break;
case r::OP::POSTFIX_DECREMENT_HEAP:
EmitPOSTFIX_DECREMENT_HEAP(instr);
break;
case r::OP::TYPEOF_HEAP:
EmitTYPEOF_HEAP(instr);
break;
case r::OP::INCREMENT:
EmitINCREMENT(instr);
break;
case r::OP::DECREMENT:
EmitDECREMENT(instr);
break;
case r::OP::POSTFIX_INCREMENT:
EmitPOSTFIX_INCREMENT(instr);
break;
case r::OP::POSTFIX_DECREMENT:
EmitPOSTFIX_DECREMENT(instr);
break;
case r::OP::PREPARE_DYNAMIC_CALL:
EmitPREPARE_DYNAMIC_CALL(instr);
break;
case r::OP::CALL:
EmitCALL(instr);
break;
case r::OP::CONSTRUCT:
EmitCONSTRUCT(instr);
break;
case r::OP::EVAL:
EmitEVAL(instr);
break;
case r::OP::RESULT:
EmitRESULT(instr);
break;
case r::OP::LOAD_FUNCTION:
EmitLOAD_FUNCTION(instr);
break;
case r::OP::INIT_VECTOR_ARRAY_ELEMENT:
EmitINIT_VECTOR_ARRAY_ELEMENT(instr);
break;
case r::OP::INIT_SPARSE_ARRAY_ELEMENT:
EmitINIT_SPARSE_ARRAY_ELEMENT(instr);
break;
case r::OP::LOAD_ARRAY:
EmitLOAD_ARRAY(instr);
break;
case r::OP::DUP_ARRAY:
EmitDUP_ARRAY(instr);
break;
case r::OP::BUILD_ENV:
EmitBUILD_ENV(instr);
break;
case r::OP::INSTANTIATE_DECLARATION_BINDING:
EmitINSTANTIATE_DECLARATION_BINDING(instr);
break;
case r::OP::INSTANTIATE_VARIABLE_BINDING:
EmitINSTANTIATE_VARIABLE_BINDING(instr);
break;
case r::OP::INITIALIZE_HEAP_IMMUTABLE:
EmitINITIALIZE_HEAP_IMMUTABLE(instr);
break;
case r::OP::LOAD_ARGUMENTS:
EmitLOAD_ARGUMENTS(instr);
break;
}
previous = instr;
std::advance(instr, length);
set_last_used(last_used_candidate());
}
// because handler makes range label to end.
SplitBasicBlock(instr, code_->end());
}
// Emitters
//
// JIT Convension is
// caller-save
// rax : tmp
// rcx : tmp
// rdx : tmp
// r10 : tmp
// r11 : tmp
//
// callee-save
// r12 : context
// r13 : frame
// r14 : breaker frame
// r15 : number mask immediate
static register_t Reg(register_t reg) {
return railgun::FrameConstant<>::kFrameSize + reg;
}
static bool IsConstantID(register_t reg) {
return reg >= Reg(railgun::FrameConstant<>::kConstantOffset);
}
static uint32_t ExtractConstantOffset(register_t reg) {
assert(IsConstantID(reg));
return reg -
railgun::FrameConstant<>::kFrameSize -
railgun::FrameConstant<>::kConstantOffset;
}
// Load virtual register
void LoadVR(const Xbyak::Reg64& out, register_t offset) {
const bool break_result = out.getIdx() == rax.getIdx();
if (IsConstantID(offset)) {
// This is constant register.
const JSVal val = code_->constants()[ExtractConstantOffset(offset)];
asm_->mov(out, Extract(val));
if (break_result) {
kill_last_used();
}
return;
}
if (last_used() == offset) {
if (!break_result) {
asm_->mov(out, rax);
}
} else {
const TypeEntry entry = type_record_.Get(offset);
if (entry.IsConstant()) {
// constant propagation in basic block level
asm_->mov(out, Extract(entry.constant()));
if (break_result) {
kill_last_used();
}
return;
}
asm_->mov(out, ptr[r13 + offset * kJSValSize]);
if (break_result) {
kill_last_used();
}
}
}
void LoadVRs(const Xbyak::Reg64& out1, register_t offset1,
const Xbyak::Reg64& out2, register_t offset2) {
if (last_used() == offset1) {
LoadVR(out1, offset1);
LoadVR(out2, offset2);
} else {
LoadVR(out2, offset2);
LoadVR(out1, offset1);
}
}
// opcode
void EmitNOP(const Instruction* instr) {
// save previous register because NOP does nothing
set_last_used_candidate(last_used());
}
// opcode
void EmitENTER(const Instruction* instr) {
// check arity and stack overflow
// initialize registers with JSUndefined
uint32_t i = 0;
const uint32_t iz = code_->registers();
const uint64_t undefined = Extract(JSUndefined);
for (; i < iz; ++i) {
const register_t dst = Reg(i);
asm_->mov(qword[r13 + dst * kJSValSize], undefined);
}
// initialize this value
if (code_->IsThisMaterialized() && !code_->strict()) {
const Assembler::LocalLabelScope scope(asm_);
asm_->mov(rsi, ptr[r13 + kJSValSize * Reg(railgun::FrameConstant<>::kThisOffset)]); // NOLINT
asm_->mov(rdi, detail::jsval64::kValueMask);
asm_->test(rdi, rsi);
asm_->jnz(".not_cell", Xbyak::CodeGenerator::T_NEAR);
// object or string
const std::ptrdiff_t offset =
IV_CAST_OFFSET(radio::Cell*, JSObject*) + JSObject::ClassOffset();
asm_->mov(rdi, qword[rsi + offset]);
asm_->test(rdi, rdi); // class is NULL => String...
asm_->jnz(".end", Xbyak::CodeGenerator::T_NEAR); // object
// string fall-through
// object materialization
asm_->L(".object_initialization"); {
asm_->mov(rdi, r14);
asm_->Call(&stub::TO_OBJECT);
asm_->mov(qword[r13 + kJSValSize * Reg(railgun::FrameConstant<>::kThisOffset)], rax); // NOLINT
asm_->jmp(".end", Xbyak::CodeGenerator::T_NEAR);
}
asm_->L(".not_cell"); {
asm_->mov(rdi, rsi);
asm_->and(rdi, -9);
asm_->cmp(rdi, detail::jsval64::kNull);
asm_->jne(".object_initialization");
// null or undefined
asm_->mov(rax, core::BitCast<uintptr_t>(ctx_->global_obj()));
asm_->mov(qword[r13 + kJSValSize * Reg(railgun::FrameConstant<>::kThisOffset)], rax); // NOLINT
}
asm_->L(".end");
}
}
// opcode | (dst | src)
void EmitMV(const Instruction* instr) {
const register_t dst = Reg(instr[1].i16[0]);
const register_t src = Reg(instr[1].i16[1]);
LoadVR(rax, src);
asm_->mov(qword[r13 + dst * kJSValSize], rax);
set_last_used_candidate(dst);
// type propagation
type_record_.Put(dst, type_record_.Get(src));
}
// opcode | (size | mutable_start)
void EmitBUILD_ENV(const Instruction* instr) {
const uint32_t size = instr[1].u32[0];
const uint32_t mutable_start = instr[1].u32[1];
asm_->mov(rdi, r12);
asm_->mov(rsi, r13);
asm_->mov(edx, size);
asm_->mov(ecx, mutable_start);
asm_->Call(&stub::BUILD_ENV);
}
// opcode | src
void EmitWITH_SETUP(const Instruction* instr) {
const register_t src = Reg(instr[1].i32[0]);
asm_->mov(rdi, r14);
asm_->mov(rsi, r13);
LoadVR(rdx, src);
asm_->Call(&stub::WITH_SETUP);
}
// opcode | (jmp | flag)
void EmitRETURN_SUBROUTINE(const Instruction* instr) {
const register_t jump = Reg(instr[1].i16[0]);
const register_t flag = Reg(instr[1].i16[1]);
{
const Assembler::LocalLabelScope scope(asm_);
LoadVR(rcx, flag);
asm_->cmp(ecx, railgun::VM::kJumpFromSubroutine);
asm_->jne(".RETURN_TO_HANDLING");
// encoded address value
LoadVR(rcx, jump);
asm_->ror(rcx, kEncodeRotateN);
asm_->sub(rcx, 1);
asm_->jmp(rcx);
asm_->L(".RETURN_TO_HANDLING");
asm_->mov(rdi, r14);
LoadVR(rsi, jump);
asm_->Call(&stub::THROW);
}
}
// opcode | (dst | offset)
void EmitLOAD_CONST(const Instruction* instr) {
// extract constant bytes
// append immediate value to machine code
//
// This method is used when constant register is overflow
const register_t dst = Reg(instr[1].ssw.i16[0]);
const uint32_t offset = instr[1].ssw.u32;
const JSVal val = code_->constants()[offset];
asm_->mov(rax, Extract(val));
asm_->mov(qword[r13 + dst * kJSValSize], rax);
set_last_used_candidate(dst);
type_record_.Put(dst, TypeEntry(val));
}
// opcode | (dst | lhs | rhs)
void EmitBINARY_ADD(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_SUBTRACT(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_MULTIPLY(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_DIVIDE(const Instruction* instr) {
const register_t dst = Reg(instr[1].i16[0]);
const register_t lhs = Reg(instr[1].i16[1]);
const register_t rhs = Reg(instr[1].i16[2]);
{
asm_->mov(rdi, r14);
LoadVR(rsi, lhs);
LoadVR(rdx, rhs);
asm_->Call(&stub::BINARY_DIVIDE);
asm_->mov(qword[r13 + dst * kJSValSize], rax);
set_last_used_candidate(dst);
}
type_record_.Put(dst, TypeEntry::Divide(type_record_.Get(lhs), type_record_.Get(rhs)));
}
// opcode | (dst | lhs | rhs)
void EmitBINARY_MODULO(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_LSHIFT(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_RSHIFT(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_RSHIFT_LOGICAL(const Instruction* instr);
// opcode | (dst | lhs | rhs)
void EmitBINARY_LT(const Instruction* instr, OP::Type fused = OP::NOP);
// opcode | (dst | lhs | rhs)
void EmitBINARY_LTE(const Instruction* instr, OP::Type fused = OP::NOP);
// opcode | (dst | lhs | rhs)
void EmitBINARY_GT(const Instruction* instr, OP::Type fused = OP::NOP);
// opcode | (dst | lhs | rhs)
void EmitBINARY_GTE(const Instruction* instr, OP::Type fused = OP::NOP);
template<typename Traits>
void EmitCompare(const Instruction* instr, OP::Type fused);
// opcode | (dst | lhs | rhs)
void EmitBINARY_INSTANCEOF(const Instruction* instr, OP::Type fused = OP::NOP) {
const register_t lhs = Reg((fused == OP::NOP) ? instr[1].i16[1] : instr[1].jump.i16[0]);
const register_t rhs = Reg((fused == OP::NOP) ? instr[1].i16[2] : instr[1].jump.i16[1]);
{
const Assembler::LocalLabelScope scope(asm_);
LoadVRs(rsi, lhs, rdx, rhs);
asm_->mov(rdi, r14);
asm_->Call(&stub::BINARY_INSTANCEOF);
if (fused != OP::NOP) {
// fused jump opcode
const std::string label = MakeLabel(instr);
asm_->cmp(rax, Extract(JSTrue));
if (fused == OP::IF_TRUE) {
asm_->je(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
} else {
asm_->jne(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
}
return;
}
const register_t dst = Reg(instr[1].i16[0]);
asm_->mov(qword[r13 + dst * kJSValSize], rax);
set_last_used_candidate(dst);
type_record_.Put(dst, TypeEntry::Instanceof(type_record_.Get(lhs), type_record_.Get(rhs)));
}
}
// opcode | (dst | lhs | rhs)
void EmitBINARY_IN(const Instruction* instr, OP::Type fused = OP::NOP) {
const register_t lhs = Reg((fused == OP::NOP) ? instr[1].i16[1] : instr[1].jump.i16[0]);
const register_t rhs = Reg((fused == OP::NOP) ? instr[1].i16[2] : instr[1].jump.i16[1]);
{
const Assembler::LocalLabelScope scope(asm_);
LoadVRs(rsi, lhs, rdx, rhs);
asm_->mov(rdi, r14);
asm_->Call(&stub::BINARY_IN);
if (fused != OP::NOP) {
// fused jump opcode
const std::string label = MakeLabel(instr);
asm_->cmp(rax, Extract(JSTrue));
if (fused == OP::IF_TRUE) {
asm_->je(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
} else {
asm_->jne(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
}
return;
}
const register_t dst = Reg(instr[1].i16[0]);
asm_->mov(qword[r13 + dst * kJSValSize], rax);
set_last_used_candidate(dst);
type_record_.Put(dst, TypeEntry::In(type_record_.Get(lhs), type_record_.Get(rhs)));
}
}
// opcode | (dst | lhs | rhs)
void EmitBINARY_EQ(const Instruction* instr, OP::Type fused = OP::NOP) {
const register_t lhs = Reg((fused == OP::NOP) ? instr[1].i16[1] : instr[1].jump.i16[0]);
const register_t rhs = Reg((fused == OP::NOP) ? instr[1].i16[2] : instr[1].jump.i16[1]);
{
const Assembler::LocalLabelScope scope(asm_);
LoadVRs(rsi, lhs, rdx, rhs);
Int32Guard(lhs, rsi, ".BINARY_EQ_SLOW");
Int32Guard(rhs, rdx, ".BINARY_EQ_SLOW");
asm_->cmp(esi, edx);
if (fused != OP::NOP) {
// fused jump opcode
const std::string label = MakeLabel(instr);
if (fused == OP::IF_TRUE) {
asm_->je(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
} else {
asm_->jne(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
}
asm_->jmp(".BINARY_EQ_EXIT");
asm_->L(".BINARY_EQ_SLOW");
asm_->mov(rdi, r14);
asm_->Call(&stub::BINARY_EQ);
asm_->cmp(rax, Extract(JSTrue));
if (fused == OP::IF_TRUE) {
asm_->je(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
} else {
asm_->jne(label.c_str(), Xbyak::CodeGenerator::T_NEAR);
}
asm_->L(".BINARY_EQ_EXIT");
return;
}