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Unified Diff: src/arm64/regexp-macro-assembler-arm64.h

Issue 1285163003: Move regexp implementation into its own folder. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: addressed comment Created 5 years, 4 months ago
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Index: src/arm64/regexp-macro-assembler-arm64.h
diff --git a/src/arm64/regexp-macro-assembler-arm64.h b/src/arm64/regexp-macro-assembler-arm64.h
deleted file mode 100644
index 47d405991bcef186e7a13b2dc3d40912c8b302fb..0000000000000000000000000000000000000000
--- a/src/arm64/regexp-macro-assembler-arm64.h
+++ /dev/null
@@ -1,293 +0,0 @@
-// Copyright 2013 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_ARM64_REGEXP_MACRO_ASSEMBLER_ARM64_H_
-#define V8_ARM64_REGEXP_MACRO_ASSEMBLER_ARM64_H_
-
-#include "src/arm64/assembler-arm64.h"
-#include "src/macro-assembler.h"
-
-namespace v8 {
-namespace internal {
-
-
-#ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerARM64: public NativeRegExpMacroAssembler {
- public:
- RegExpMacroAssemblerARM64(Isolate* isolate, Zone* zone, Mode mode,
- int registers_to_save);
- virtual ~RegExpMacroAssemblerARM64();
- virtual void AbortedCodeGeneration() { masm_->AbortedCodeGeneration(); }
- virtual int stack_limit_slack();
- virtual void AdvanceCurrentPosition(int by);
- virtual void AdvanceRegister(int reg, int by);
- virtual void Backtrack();
- virtual void Bind(Label* label);
- virtual void CheckAtStart(Label* on_at_start);
- virtual void CheckCharacter(unsigned c, Label* on_equal);
- virtual void CheckCharacterAfterAnd(unsigned c,
- unsigned mask,
- Label* on_equal);
- virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
- virtual void CheckCharacterLT(uc16 limit, Label* on_less);
- virtual void CheckCharacters(Vector<const uc16> str,
- int cp_offset,
- Label* on_failure,
- bool check_end_of_string);
- // A "greedy loop" is a loop that is both greedy and with a simple
- // body. It has a particularly simple implementation.
- virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
- virtual void CheckNotAtStart(Label* on_not_at_start);
- virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
- virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
- Label* on_no_match);
- virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
- virtual void CheckNotCharacterAfterAnd(unsigned c,
- unsigned mask,
- Label* on_not_equal);
- virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
- uc16 minus,
- uc16 mask,
- Label* on_not_equal);
- virtual void CheckCharacterInRange(uc16 from,
- uc16 to,
- Label* on_in_range);
- virtual void CheckCharacterNotInRange(uc16 from,
- uc16 to,
- Label* on_not_in_range);
- virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
-
- // Checks whether the given offset from the current position is before
- // the end of the string.
- virtual void CheckPosition(int cp_offset, Label* on_outside_input);
- virtual bool CheckSpecialCharacterClass(uc16 type,
- Label* on_no_match);
- virtual void Fail();
- virtual Handle<HeapObject> GetCode(Handle<String> source);
- virtual void GoTo(Label* label);
- virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
- virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
- virtual void IfRegisterEqPos(int reg, Label* if_eq);
- virtual IrregexpImplementation Implementation();
- virtual void LoadCurrentCharacter(int cp_offset,
- Label* on_end_of_input,
- bool check_bounds = true,
- int characters = 1);
- virtual void PopCurrentPosition();
- virtual void PopRegister(int register_index);
- virtual void PushBacktrack(Label* label);
- virtual void PushCurrentPosition();
- virtual void PushRegister(int register_index,
- StackCheckFlag check_stack_limit);
- virtual void ReadCurrentPositionFromRegister(int reg);
- virtual void ReadStackPointerFromRegister(int reg);
- virtual void SetCurrentPositionFromEnd(int by);
- virtual void SetRegister(int register_index, int to);
- virtual bool Succeed();
- virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
- virtual void ClearRegisters(int reg_from, int reg_to);
- virtual void WriteStackPointerToRegister(int reg);
- virtual bool CanReadUnaligned();
-
- // Called from RegExp if the stack-guard is triggered.
- // If the code object is relocated, the return address is fixed before
- // returning.
- static int CheckStackGuardState(Address* return_address,
- Code* re_code,
- Address re_frame,
- int start_offset,
- const byte** input_start,
- const byte** input_end);
-
- private:
- // Above the frame pointer - Stored registers and stack passed parameters.
- // Callee-saved registers x19-x29, where x29 is the old frame pointer.
- static const int kCalleeSavedRegisters = 0;
- // Return address.
- // It is placed above the 11 callee-saved registers.
- static const int kReturnAddress = kCalleeSavedRegisters + 11 * kPointerSize;
- static const int kSecondaryReturnAddress = kReturnAddress + kPointerSize;
- // Stack parameter placed by caller.
- static const int kIsolate = kSecondaryReturnAddress + kPointerSize;
-
- // Below the frame pointer.
- // Register parameters stored by setup code.
- static const int kDirectCall = kCalleeSavedRegisters - kPointerSize;
- static const int kStackBase = kDirectCall - kPointerSize;
- static const int kOutputSize = kStackBase - kPointerSize;
- static const int kInput = kOutputSize - kPointerSize;
- // When adding local variables remember to push space for them in
- // the frame in GetCode.
- static const int kSuccessCounter = kInput - kPointerSize;
- // First position register address on the stack. Following positions are
- // below it. A position is a 32 bit value.
- static const int kFirstRegisterOnStack = kSuccessCounter - kWRegSize;
- // A capture is a 64 bit value holding two position.
- static const int kFirstCaptureOnStack = kSuccessCounter - kXRegSize;
-
- // Initial size of code buffer.
- static const size_t kRegExpCodeSize = 1024;
-
- // When initializing registers to a non-position value we can unroll
- // the loop. Set the limit of registers to unroll.
- static const int kNumRegistersToUnroll = 16;
-
- // We are using x0 to x7 as a register cache. Each hardware register must
- // contain one capture, that is two 32 bit registers. We can cache at most
- // 16 registers.
- static const int kNumCachedRegisters = 16;
-
- // Load a number of characters at the given offset from the
- // current position, into the current-character register.
- void LoadCurrentCharacterUnchecked(int cp_offset, int character_count);
-
- // Check whether preemption has been requested.
- void CheckPreemption();
-
- // Check whether we are exceeding the stack limit on the backtrack stack.
- void CheckStackLimit();
-
- // Generate a call to CheckStackGuardState.
- void CallCheckStackGuardState(Register scratch);
-
- // Location of a 32 bit position register.
- MemOperand register_location(int register_index);
-
- // Location of a 64 bit capture, combining two position registers.
- MemOperand capture_location(int register_index, Register scratch);
-
- // Register holding the current input position as negative offset from
- // the end of the string.
- Register current_input_offset() { return w21; }
-
- // The register containing the current character after LoadCurrentCharacter.
- Register current_character() { return w22; }
-
- // Register holding address of the end of the input string.
- Register input_end() { return x25; }
-
- // Register holding address of the start of the input string.
- Register input_start() { return x26; }
-
- // Register holding the offset from the start of the string where we should
- // start matching.
- Register start_offset() { return w27; }
-
- // Pointer to the output array's first element.
- Register output_array() { return x28; }
-
- // Register holding the frame address. Local variables, parameters and
- // regexp registers are addressed relative to this.
- Register frame_pointer() { return fp; }
-
- // The register containing the backtrack stack top. Provides a meaningful
- // name to the register.
- Register backtrack_stackpointer() { return x23; }
-
- // Register holding pointer to the current code object.
- Register code_pointer() { return x20; }
-
- // Register holding the value used for clearing capture registers.
- Register non_position_value() { return w24; }
- // The top 32 bit of this register is used to store this value
- // twice. This is used for clearing more than one register at a time.
- Register twice_non_position_value() { return x24; }
-
- // Byte size of chars in the string to match (decided by the Mode argument)
- int char_size() { return static_cast<int>(mode_); }
-
- // Equivalent to a conditional branch to the label, unless the label
- // is NULL, in which case it is a conditional Backtrack.
- void BranchOrBacktrack(Condition condition, Label* to);
-
- // Compares reg against immmediate before calling BranchOrBacktrack.
- // It makes use of the Cbz and Cbnz instructions.
- void CompareAndBranchOrBacktrack(Register reg,
- int immediate,
- Condition condition,
- Label* to);
-
- inline void CallIf(Label* to, Condition condition);
-
- // Save and restore the link register on the stack in a way that
- // is GC-safe.
- inline void SaveLinkRegister();
- inline void RestoreLinkRegister();
-
- // Pushes the value of a register on the backtrack stack. Decrements the
- // stack pointer by a word size and stores the register's value there.
- inline void Push(Register source);
-
- // Pops a value from the backtrack stack. Reads the word at the stack pointer
- // and increments it by a word size.
- inline void Pop(Register target);
-
- // This state indicates where the register actually is.
- enum RegisterState {
- STACKED, // Resides in memory.
- CACHED_LSW, // Least Significant Word of a 64 bit hardware register.
- CACHED_MSW // Most Significant Word of a 64 bit hardware register.
- };
-
- RegisterState GetRegisterState(int register_index) {
- DCHECK(register_index >= 0);
- if (register_index >= kNumCachedRegisters) {
- return STACKED;
- } else {
- if ((register_index % 2) == 0) {
- return CACHED_LSW;
- } else {
- return CACHED_MSW;
- }
- }
- }
-
- // Store helper that takes the state of the register into account.
- inline void StoreRegister(int register_index, Register source);
-
- // Returns a hardware W register that holds the value of the capture
- // register.
- //
- // This function will try to use an existing cache register (w0-w7) for the
- // result. Otherwise, it will load the value into maybe_result.
- //
- // If the returned register is anything other than maybe_result, calling code
- // must not write to it.
- inline Register GetRegister(int register_index, Register maybe_result);
-
- // Returns the harware register (x0-x7) holding the value of the capture
- // register.
- // This assumes that the state of the register is not STACKED.
- inline Register GetCachedRegister(int register_index);
-
- Isolate* isolate() const { return masm_->isolate(); }
-
- MacroAssembler* masm_;
-
- // Which mode to generate code for (LATIN1 or UC16).
- Mode mode_;
-
- // One greater than maximal register index actually used.
- int num_registers_;
-
- // Number of registers to output at the end (the saved registers
- // are always 0..num_saved_registers_-1)
- int num_saved_registers_;
-
- // Labels used internally.
- Label entry_label_;
- Label start_label_;
- Label success_label_;
- Label backtrack_label_;
- Label exit_label_;
- Label check_preempt_label_;
- Label stack_overflow_label_;
-};
-
-#endif // V8_INTERPRETED_REGEXP
-
-
-}} // namespace v8::internal
-
-#endif // V8_ARM64_REGEXP_MACRO_ASSEMBLER_ARM64_H_
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