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-rw-r--r--deps/v8/src/arm64/code-stubs-arm64.h232
1 files changed, 1 insertions, 231 deletions
diff --git a/deps/v8/src/arm64/code-stubs-arm64.h b/deps/v8/src/arm64/code-stubs-arm64.h
index 0713d3a319..14c4a988ac 100644
--- a/deps/v8/src/arm64/code-stubs-arm64.h
+++ b/deps/v8/src/arm64/code-stubs-arm64.h
@@ -8,196 +8,6 @@
namespace v8 {
namespace internal {
-
-class StringHelper : public AllStatic {
- public:
- // Compares two flat one-byte strings and returns result in x0.
- static void GenerateCompareFlatOneByteStrings(
- MacroAssembler* masm, Register left, Register right, Register scratch1,
- Register scratch2, Register scratch3, Register scratch4);
-
- // Compare two flat one-byte strings for equality and returns result in x0.
- static void GenerateFlatOneByteStringEquals(MacroAssembler* masm,
- Register left, Register right,
- Register scratch1,
- Register scratch2,
- Register scratch3);
-
- private:
- static void GenerateOneByteCharsCompareLoop(
- MacroAssembler* masm, Register left, Register right, Register length,
- Register scratch1, Register scratch2, Label* chars_not_equal);
-
- DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper);
-};
-
-
-class RecordWriteStub: public PlatformCodeStub {
- public:
- // Stub to record the write of 'value' at 'address' in 'object'.
- // Typically 'address' = 'object' + <some offset>.
- // See MacroAssembler::RecordWriteField() for example.
- RecordWriteStub(Isolate* isolate,
- Register object,
- Register value,
- Register address,
- RememberedSetAction remembered_set_action,
- SaveFPRegsMode fp_mode)
- : PlatformCodeStub(isolate),
- regs_(object, // An input reg.
- address, // An input reg.
- value) { // One scratch reg.
- DCHECK(object.Is64Bits());
- DCHECK(value.Is64Bits());
- DCHECK(address.Is64Bits());
- minor_key_ = ObjectBits::encode(object.code()) |
- ValueBits::encode(value.code()) |
- AddressBits::encode(address.code()) |
- RememberedSetActionBits::encode(remembered_set_action) |
- SaveFPRegsModeBits::encode(fp_mode);
- }
-
- RecordWriteStub(uint32_t key, Isolate* isolate)
- : PlatformCodeStub(key, isolate), regs_(object(), address(), value()) {}
-
- enum Mode {
- STORE_BUFFER_ONLY,
- INCREMENTAL,
- INCREMENTAL_COMPACTION
- };
-
- bool SometimesSetsUpAFrame() override { return false; }
-
- static Mode GetMode(Code* stub);
-
- static void Patch(Code* stub, Mode mode);
-
- DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
-
- private:
- // This is a helper class to manage the registers associated with the stub.
- // The 'object' and 'address' registers must be preserved.
- class RegisterAllocation {
- public:
- RegisterAllocation(Register object, Register address, Register scratch);
-
- void Save(MacroAssembler* masm) {
- // We don't have to save scratch0_ because it was given to us as
- // a scratch register.
- masm->Push(scratch1_, scratch2_);
- }
-
- void Restore(MacroAssembler* masm) {
- masm->Pop(scratch2_, scratch1_);
- }
-
- // If we have to call into C then we need to save and restore all caller-
- // saved registers that were not already preserved.
- void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) {
- // TODO(all): This can be very expensive, and it is likely that not every
- // register will need to be preserved. Can we improve this?
- masm->PushCPURegList(saved_regs_);
- if (mode == kSaveFPRegs) {
- masm->PushCPURegList(saved_fp_regs_);
- }
- }
-
- void RestoreCallerSaveRegisters(MacroAssembler*masm, SaveFPRegsMode mode) {
- // TODO(all): This can be very expensive, and it is likely that not every
- // register will need to be preserved. Can we improve this?
- if (mode == kSaveFPRegs) {
- masm->PopCPURegList(saved_fp_regs_);
- }
- masm->PopCPURegList(saved_regs_);
- }
-
- Register object() { return object_; }
- Register address() { return address_; }
- Register scratch0() { return scratch0_; }
- Register scratch1() { return scratch1_; }
- Register scratch2() { return scratch2_; }
-
- private:
- Register object_;
- Register address_;
- Register scratch0_;
- Register scratch1_ = NoReg;
- Register scratch2_ = NoReg;
- CPURegList saved_regs_;
- CPURegList saved_fp_regs_;
-
- // TODO(all): We should consider moving this somewhere else.
- static CPURegList GetValidRegistersForAllocation() {
- // The list of valid registers for allocation is defined as all the
- // registers without those with a special meaning.
- //
- // The default list excludes registers x26 to x31 because they are
- // reserved for the following purpose:
- // - x26 root register
- // - x27 context pointer register
- // - x28 jssp
- // - x29 frame pointer
- // - x30 link register(lr)
- // - x31 xzr/stack pointer
- CPURegList list(CPURegister::kRegister, kXRegSizeInBits, 0, 25);
-
- // We also remove MacroAssembler's scratch registers.
- list.Remove(MacroAssembler::DefaultTmpList());
-
- return list;
- }
-
- friend class RecordWriteStub;
- };
-
- enum OnNoNeedToInformIncrementalMarker {
- kReturnOnNoNeedToInformIncrementalMarker,
- kUpdateRememberedSetOnNoNeedToInformIncrementalMarker
- };
-
- inline Major MajorKey() const final { return RecordWrite; }
-
- void Generate(MacroAssembler* masm) override;
- void GenerateIncremental(MacroAssembler* masm, Mode mode);
- void CheckNeedsToInformIncrementalMarker(
- MacroAssembler* masm,
- OnNoNeedToInformIncrementalMarker on_no_need,
- Mode mode);
- void InformIncrementalMarker(MacroAssembler* masm);
-
- void Activate(Code* code) override;
-
- Register object() const {
- return Register::from_code(ObjectBits::decode(minor_key_));
- }
-
- Register value() const {
- return Register::from_code(ValueBits::decode(minor_key_));
- }
-
- Register address() const {
- return Register::from_code(AddressBits::decode(minor_key_));
- }
-
- RememberedSetAction remembered_set_action() const {
- return RememberedSetActionBits::decode(minor_key_);
- }
-
- SaveFPRegsMode save_fp_regs_mode() const {
- return SaveFPRegsModeBits::decode(minor_key_);
- }
-
- class ObjectBits: public BitField<int, 0, 5> {};
- class ValueBits: public BitField<int, 5, 5> {};
- class AddressBits: public BitField<int, 10, 5> {};
- class RememberedSetActionBits: public BitField<RememberedSetAction, 15, 1> {};
- class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 16, 1> {};
-
- Label slow_;
- RegisterAllocation regs_;
-};
-
-
// Helper to call C++ functions from generated code. The caller must prepare
// the exit frame before doing the call with GenerateCall.
class DirectCEntryStub: public PlatformCodeStub {
@@ -206,52 +16,12 @@ class DirectCEntryStub: public PlatformCodeStub {
void GenerateCall(MacroAssembler* masm, Register target);
private:
- bool NeedsImmovableCode() override { return true; }
+ Movability NeedsImmovableCode() override { return kImmovable; }
DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
DEFINE_PLATFORM_CODE_STUB(DirectCEntry, PlatformCodeStub);
};
-
-class NameDictionaryLookupStub: public PlatformCodeStub {
- public:
- enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP };
-
- NameDictionaryLookupStub(Isolate* isolate, LookupMode mode)
- : PlatformCodeStub(isolate) {
- minor_key_ = LookupModeBits::encode(mode);
- }
-
- static void GenerateNegativeLookup(MacroAssembler* masm,
- Label* miss,
- Label* done,
- Register receiver,
- Register properties,
- Handle<Name> name,
- Register scratch0);
-
- bool SometimesSetsUpAFrame() override { return false; }
-
- private:
- static const int kInlinedProbes = 4;
- static const int kTotalProbes = 20;
-
- static const int kCapacityOffset =
- NameDictionary::kHeaderSize +
- NameDictionary::kCapacityIndex * kPointerSize;
-
- static const int kElementsStartOffset =
- NameDictionary::kHeaderSize +
- NameDictionary::kElementsStartIndex * kPointerSize;
-
- LookupMode mode() const { return LookupModeBits::decode(minor_key_); }
-
- class LookupModeBits: public BitField<LookupMode, 0, 1> {};
-
- DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
- DEFINE_PLATFORM_CODE_STUB(NameDictionaryLookup, PlatformCodeStub);
-};
-
} // namespace internal
} // namespace v8
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-10 22:41:52 +0000