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x64: Implement regexp literals and string CharCodeAt in lithium backend.

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Review URL: http://codereview.chromium.org/6469052

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6853 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
ager@chromium.org 2011-02-18 14:00:46 +00:00
parent fc7e79a838
commit b8f0b88b54
8 changed files with 236 additions and 19 deletions
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2
src/ia32/assembler-ia32.h
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@ -184,7 +184,7 @@ typedef XMMRegister DoubleRegister;
// Index of register used in pusha/popa.
// Order of pushed registers: EAX, ECX, EDX, EBX, ESP, EBP, ESI, and EDI
// Order of pushed registers: eax, ecx, edx, ebx, esp, ebp, esi, and edi.
inline int EspIndexForPushAll(Register reg) {
return Register::kNumRegisters - 1 - reg.code();
}

9
src/ia32/lithium-codegen-ia32.cc
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@ -2859,19 +2859,20 @@ void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) {
__ test(result, Immediate(kStringRepresentationMask));
__ j(not_zero, deferred->entry());
// Check for 1-byte or 2-byte string.
// Check for ASCII or two-byte string.
__ bind(&flat_string);
STATIC_ASSERT(kAsciiStringTag != 0);
__ test(result, Immediate(kStringEncodingMask));
__ j(not_zero, &ascii_string);
// 2-byte string.
// Load the 2-byte character code into the result register.
// Two-byte string.
// Load the two-byte character code into the result register.
STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
if (instr->index()->IsConstantOperand()) {
__ movzx_w(result,
FieldOperand(string,
SeqTwoByteString::kHeaderSize + 2 * const_index));
SeqTwoByteString::kHeaderSize +
(kUC16Size * const_index)));
} else {
__ movzx_w(result, FieldOperand(string,
index,

15
src/x64/assembler-x64.cc
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@ -190,13 +190,18 @@ void RelocInfo::PatchCode(byte* instructions, int instruction_count) {
// -----------------------------------------------------------------------------
// Register constants.
const int Register::registerCodeByAllocationIndex[kNumAllocatableRegisters] = {
// rax, rbx, rdx, rcx, rdi, r8, r9, r11, r14, r12
0, 3, 2, 1, 7, 8, 9, 11, 14, 12
const int Register::kRegisterCodeByAllocationIndex[kNumAllocatableRegisters] = {
// rax, rbx, rdx, rcx, rdi, r8, r9, r11, r14, r12
0, 3, 2, 1, 7, 8, 9, 11, 14, 12
};
const int Register::allocationIndexByRegisterCode[kNumRegisters] = {
0, 3, 2, 1, -1, -1, -1, 4, 5, 6, -1, 7, 9, -1, 8, -1
const int Register::kAllocationIndexByRegisterCode[kNumRegisters] = {
0, 3, 2, 1, -1, -1, -1, 4, 5, 6, -1, 7, 9, -1, 8, -1
};
const int Register::kRspIndexForPushAllByRegisterCode[kNumRegisters] = {
10, 9, 8, 7, -1, -1, 6, 5, 4, 3, -1, 2, 1, -1, 0, -1
};

13
src/x64/assembler-x64.h
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@ -99,15 +99,19 @@ struct Register {
static const int kNumAllocatableRegisters = 10;
static int ToAllocationIndex(Register reg) {
return allocationIndexByRegisterCode[reg.code()];
return kAllocationIndexByRegisterCode[reg.code()];
}
static Register FromAllocationIndex(int index) {
ASSERT(index >= 0 && index < kNumAllocatableRegisters);
Register result = { registerCodeByAllocationIndex[index] };
Register result = { kRegisterCodeByAllocationIndex[index] };
return result;
}
static int ToRspIndexForPushAll(Register reg) {
return kRspIndexForPushAllByRegisterCode[reg.code()];
}
static const char* AllocationIndexToString(int index) {
ASSERT(index >= 0 && index < kNumAllocatableRegisters);
const char* const names[] = {
@ -155,8 +159,9 @@ struct Register {
int code_;
private:
static const int registerCodeByAllocationIndex[kNumAllocatableRegisters];
static const int allocationIndexByRegisterCode[kNumRegisters];
static const int kRegisterCodeByAllocationIndex[kNumAllocatableRegisters];
static const int kAllocationIndexByRegisterCode[kNumRegisters];
static const int kRspIndexForPushAllByRegisterCode[kNumRegisters];
};
const Register rax = { 0 };

190
src/x64/lithium-codegen-x64.cc
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@ -2309,6 +2309,147 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
}
void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) {
class DeferredStringCharCodeAt: public LDeferredCode {
public:
DeferredStringCharCodeAt(LCodeGen* codegen, LStringCharCodeAt* instr)
: LDeferredCode(codegen), instr_(instr) { }
virtual void Generate() { codegen()->DoDeferredStringCharCodeAt(instr_); }
private:
LStringCharCodeAt* instr_;
};
Register string = ToRegister(instr->string());
Register index = no_reg;
int const_index = -1;
if (instr->index()->IsConstantOperand()) {
const_index = ToInteger32(LConstantOperand::cast(instr->index()));
STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue);
if (!Smi::IsValid(const_index)) {
// Guaranteed to be out of bounds because of the assert above.
// So the bounds check that must dominate this instruction must
// have deoptimized already.
if (FLAG_debug_code) {
__ Abort("StringCharCodeAt: out of bounds index.");
}
// No code needs to be generated.
return;
}
} else {
index = ToRegister(instr->index());
}
Register result = ToRegister(instr->result());
DeferredStringCharCodeAt* deferred =
new DeferredStringCharCodeAt(this, instr);
NearLabel flat_string, ascii_string, done;
// Fetch the instance type of the receiver into result register.
__ movq(result, FieldOperand(string, HeapObject::kMapOffset));
__ movzxbl(result, FieldOperand(result, Map::kInstanceTypeOffset));
// We need special handling for non-sequential strings.
STATIC_ASSERT(kSeqStringTag == 0);
__ testb(result, Immediate(kStringRepresentationMask));
__ j(zero, &flat_string);
// Handle cons strings and go to deferred code for the rest.
__ testb(result, Immediate(kIsConsStringMask));
__ j(zero, deferred->entry());
// ConsString.
// Check whether the right hand side is the empty string (i.e. if
// this is really a flat string in a cons string). If that is not
// the case we would rather go to the runtime system now to flatten
// the string.
__ CompareRoot(FieldOperand(string, ConsString::kSecondOffset),
Heap::kEmptyStringRootIndex);
__ j(not_equal, deferred->entry());
// Get the first of the two strings and load its instance type.
__ movq(string, FieldOperand(string, ConsString::kFirstOffset));
__ movq(result, FieldOperand(string, HeapObject::kMapOffset));
__ movzxbl(result, FieldOperand(result, Map::kInstanceTypeOffset));
// If the first cons component is also non-flat, then go to runtime.
STATIC_ASSERT(kSeqStringTag == 0);
__ testb(result, Immediate(kStringRepresentationMask));
__ j(not_zero, deferred->entry());
// Check for ASCII or two-byte string.
__ bind(&flat_string);
STATIC_ASSERT(kAsciiStringTag != 0);
__ testb(result, Immediate(kStringEncodingMask));
__ j(not_zero, &ascii_string);
// Two-byte string.
// Load the two-byte character code into the result register.
STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
if (instr->index()->IsConstantOperand()) {
__ movzxwl(result,
FieldOperand(string,
SeqTwoByteString::kHeaderSize +
(kUC16Size * const_index)));
} else {
__ movzxwl(result, FieldOperand(string,
index,
times_2,
SeqTwoByteString::kHeaderSize));
}
__ jmp(&done);
// ASCII string.
// Load the byte into the result register.
__ bind(&ascii_string);
if (instr->index()->IsConstantOperand()) {
__ movzxbl(result, FieldOperand(string,
SeqAsciiString::kHeaderSize + const_index));
} else {
__ movzxbl(result, FieldOperand(string,
index,
times_1,
SeqAsciiString::kHeaderSize));
}
__ bind(&done);
__ bind(deferred->exit());
}
void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
Register string = ToRegister(instr->string());
Register result = ToRegister(instr->result());
// TODO(3095996): Get rid of this. For now, we need to make the
// result register contain a valid pointer because it is already
// contained in the register pointer map.
__ Set(result, 0);
__ PushSafepointRegisters();
__ push(string);
// Push the index as a smi. This is safe because of the checks in
// DoStringCharCodeAt above.
STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue);
if (instr->index()->IsConstantOperand()) {
int const_index = ToInteger32(LConstantOperand::cast(instr->index()));
__ Push(Smi::FromInt(const_index));
} else {
Register index = ToRegister(instr->index());
__ Integer32ToSmi(index, index);
__ push(index);
}
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
__ CallRuntimeSaveDoubles(Runtime::kStringCharCodeAt);
RecordSafepointWithRegisters(
instr->pointer_map(), 2, Safepoint::kNoDeoptimizationIndex);
if (FLAG_debug_code) {
__ AbortIfNotSmi(rax);
}
__ SmiToInteger32(rax, rax);
__ movq(Operand(rsp, Register::ToRspIndexForPushAll(result) * kPointerSize),
rax);
__ PopSafepointRegisters();
}
void LCodeGen::DoStringLength(LStringLength* instr) {
Register string = ToRegister(instr->string());
Register result = ToRegister(instr->result());
@ -2667,7 +2808,54 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
Abort("Unimplemented: %s", "DoRegExpLiteral");
NearLabel materialized;
// Registers will be used as follows:
// rdi = JS function.
// rcx = literals array.
// rbx = regexp literal.
// rax = regexp literal clone.
__ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
__ movq(rcx, FieldOperand(rdi, JSFunction::kLiteralsOffset));
int literal_offset = FixedArray::kHeaderSize +
instr->hydrogen()->literal_index() * kPointerSize;
__ movq(rbx, FieldOperand(rcx, literal_offset));
__ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
__ j(not_equal, &materialized);
// Create regexp literal using runtime function
// Result will be in rax.
__ push(rcx);
__ Push(Smi::FromInt(instr->hydrogen()->literal_index()));
__ Push(instr->hydrogen()->pattern());
__ Push(instr->hydrogen()->flags());
CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr);
__ movq(rbx, rax);
__ bind(&materialized);
int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
Label allocated, runtime_allocate;
__ AllocateInNewSpace(size, rax, rcx, rdx, &runtime_allocate, TAG_OBJECT);
__ jmp(&allocated);
__ bind(&runtime_allocate);
__ push(rbx);
__ Push(Smi::FromInt(size));
CallRuntime(Runtime::kAllocateInNewSpace, 1, instr);
__ pop(rbx);
__ bind(&allocated);
// Copy the content into the newly allocated memory.
// (Unroll copy loop once for better throughput).
for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) {
__ movq(rdx, FieldOperand(rbx, i));
__ movq(rcx, FieldOperand(rbx, i + kPointerSize));
__ movq(FieldOperand(rax, i), rdx);
__ movq(FieldOperand(rax, i + kPointerSize), rcx);
}
if ((size % (2 * kPointerSize)) != 0) {
__ movq(rdx, FieldOperand(rbx, size - kPointerSize));
__ movq(FieldOperand(rax, size - kPointerSize), rdx);
}
}

1
src/x64/lithium-codegen-x64.h
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@ -90,6 +90,7 @@ class LCodeGen BASE_EMBEDDED {
void DoDeferredTaggedToI(LTaggedToI* instr);
void DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr);
void DoDeferredStackCheck(LGoto* instr);
void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr);
void DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr);
// Parallel move support.

9
src/x64/lithium-x64.cc
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@ -1782,8 +1782,10 @@ LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
Abort("Unimplemented: %s", "DoStringCharCodeAt");
return NULL;
LOperand* string = UseRegister(instr->string());
LOperand* index = UseRegisterOrConstant(instr->index());
LStringCharCodeAt* result = new LStringCharCodeAt(string, index);
return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
}
@ -1804,8 +1806,7 @@ LInstruction* LChunkBuilder::DoObjectLiteral(HObjectLiteral* instr) {
LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
Abort("Unimplemented: %s", "DoRegExpLiteral");
return NULL;
return MarkAsCall(DefineFixed(new LRegExpLiteral, rax), instr);
}

16
src/x64/lithium-x64.h
View File

@ -147,6 +147,7 @@ class LCodeGen;
V(StoreNamedField) \
V(StoreNamedGeneric) \
V(StorePixelArrayElement) \
V(StringCharCodeAt) \
V(StringLength) \
V(SubI) \
V(TaggedToI) \
@ -1572,6 +1573,21 @@ class LStoreKeyedGeneric: public LStoreKeyed {
};
class LStringCharCodeAt: public LTemplateInstruction<1, 2, 0> {
public:
LStringCharCodeAt(LOperand* string, LOperand* index) {
inputs_[0] = string;
inputs_[1] = index;
}
DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
LOperand* string() { return inputs_[0]; }
LOperand* index() { return inputs_[1]; }
};
class LStringLength: public LTemplateInstruction<1, 1, 0> {
public:
explicit LStringLength(LOperand* string) {