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Diffstat (limited to 'js/src/irregexp/imported/regexp-bytecodes.h')
| -rw-r--r-- | js/src/irregexp/imported/regexp-bytecodes.h | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/js/src/irregexp/imported/regexp-bytecodes.h b/js/src/irregexp/imported/regexp-bytecodes.h new file mode 100644 index 0000000000..5602d8d7bc --- /dev/null +++ b/js/src/irregexp/imported/regexp-bytecodes.h @@ -0,0 +1,257 @@ +// Copyright 2011 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_REGEXP_REGEXP_BYTECODES_H_ +#define V8_REGEXP_REGEXP_BYTECODES_H_ + +#include "irregexp/RegExpShim.h" + +namespace v8 { +namespace internal { + +// Maximum number of bytecodes that will be used (next power of 2 of actually +// defined bytecodes). +// All slots between the last actually defined bytecode and maximum id will be +// filled with BREAKs, indicating an invalid operation. This way using +// BYTECODE_MASK guarantees no OOB access to the dispatch table. +constexpr int kRegExpPaddedBytecodeCount = 1 << 6; +constexpr int BYTECODE_MASK = kRegExpPaddedBytecodeCount - 1; +// The first argument is packed in with the byte code in one word, but so it +// has 24 bits, but it can be positive and negative so only use 23 bits for +// positive values. +const unsigned int MAX_FIRST_ARG = 0x7fffffu; +const int BYTECODE_SHIFT = 8; +static_assert(1 << BYTECODE_SHIFT > BYTECODE_MASK); + +// The list of bytecodes, in format: V(Name, Code, ByteLength). +// TODO(pthier): Argument offsets of bytecodes should be easily accessible by +// name or at least by position. +// TODO(jgruber): More precise types (e.g. int32/uint32 instead of value32). +#define BYTECODE_ITERATOR(V) \ + V(BREAK, 0, 4) /* bc8 */ \ + V(PUSH_CP, 1, 4) /* bc8 pad24 */ \ + V(PUSH_BT, 2, 8) /* bc8 pad24 offset32 */ \ + V(PUSH_REGISTER, 3, 4) /* bc8 reg_idx24 */ \ + V(SET_REGISTER_TO_CP, 4, 8) /* bc8 reg_idx24 offset32 */ \ + V(SET_CP_TO_REGISTER, 5, 4) /* bc8 reg_idx24 */ \ + V(SET_REGISTER_TO_SP, 6, 4) /* bc8 reg_idx24 */ \ + V(SET_SP_TO_REGISTER, 7, 4) /* bc8 reg_idx24 */ \ + V(SET_REGISTER, 8, 8) /* bc8 reg_idx24 value32 */ \ + V(ADVANCE_REGISTER, 9, 8) /* bc8 reg_idx24 value32 */ \ + V(POP_CP, 10, 4) /* bc8 pad24 */ \ + V(POP_BT, 11, 4) /* bc8 pad24 */ \ + V(POP_REGISTER, 12, 4) /* bc8 reg_idx24 */ \ + V(FAIL, 13, 4) /* bc8 pad24 */ \ + V(SUCCEED, 14, 4) /* bc8 pad24 */ \ + V(ADVANCE_CP, 15, 4) /* bc8 offset24 */ \ + /* Jump to another bytecode given its offset. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x10 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: 0x00 (unused) Padding */ \ + /* 0x20 - 0x3F: Address of bytecode to jump to */ \ + V(GOTO, 16, 8) /* bc8 pad24 addr32 */ \ + /* Check if offset is in range and load character at given offset. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x11 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: Offset from current position */ \ + /* 0x20 - 0x3F: Address of bytecode when load is out of range */ \ + V(LOAD_CURRENT_CHAR, 17, 8) /* bc8 offset24 addr32 */ \ + /* Load character at given offset without range checks. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x12 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: Offset from current position */ \ + V(LOAD_CURRENT_CHAR_UNCHECKED, 18, 4) /* bc8 offset24 */ \ + V(LOAD_2_CURRENT_CHARS, 19, 8) /* bc8 offset24 addr32 */ \ + V(LOAD_2_CURRENT_CHARS_UNCHECKED, 20, 4) /* bc8 offset24 */ \ + V(LOAD_4_CURRENT_CHARS, 21, 8) /* bc8 offset24 addr32 */ \ + V(LOAD_4_CURRENT_CHARS_UNCHECKED, 22, 4) /* bc8 offset24 */ \ + V(CHECK_4_CHARS, 23, 12) /* bc8 pad24 uint32 addr32 */ \ + /* Check if current character is equal to a given character */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x19 (fixed) Bytecode */ \ + /* 0x08 - 0x0F: 0x00 (unused) Padding */ \ + /* 0x10 - 0x1F: Character to check */ \ + /* 0x20 - 0x3F: Address of bytecode when matched */ \ + V(CHECK_CHAR, 24, 8) /* bc8 pad8 uint16 addr32 */ \ + V(CHECK_NOT_4_CHARS, 25, 12) /* bc8 pad24 uint32 addr32 */ \ + V(CHECK_NOT_CHAR, 26, 8) /* bc8 pad8 uint16 addr32 */ \ + V(AND_CHECK_4_CHARS, 27, 16) /* bc8 pad24 uint32 uint32 addr32 */ \ + /* Checks if the current character combined with mask (bitwise and) */ \ + /* matches a character (e.g. used when two characters in a disjunction */ \ + /* differ by only a single bit */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x1c (fixed) Bytecode */ \ + /* 0x08 - 0x0F: 0x00 (unused) Padding */ \ + /* 0x10 - 0x1F: Character to match against (after mask aplied) */ \ + /* 0x20 - 0x3F: Bitmask bitwise and combined with current character */ \ + /* 0x40 - 0x5F: Address of bytecode when matched */ \ + V(AND_CHECK_CHAR, 28, 12) /* bc8 pad8 uint16 uint32 addr32 */ \ + V(AND_CHECK_NOT_4_CHARS, 29, 16) /* bc8 pad24 uint32 uint32 addr32 */ \ + V(AND_CHECK_NOT_CHAR, 30, 12) /* bc8 pad8 uint16 uint32 addr32 */ \ + V(MINUS_AND_CHECK_NOT_CHAR, 31, \ + 12) /* bc8 pad8 base::uc16 base::uc16 base::uc16 addr32 */ \ + V(CHECK_CHAR_IN_RANGE, 32, 12) /* bc8 pad24 base::uc16 base::uc16 addr32 */ \ + V(CHECK_CHAR_NOT_IN_RANGE, 33, \ + 12) /* bc8 pad24 base::uc16 base::uc16 addr32 */ \ + /* Checks if the current character matches any of the characters encoded */ \ + /* in a bit table. Similar to/inspired by boyer moore string search */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x22 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: 0x00 (unused) Padding */ \ + /* 0x20 - 0x3F: Address of bytecode when bit is set */ \ + /* 0x40 - 0xBF: Bit table */ \ + V(CHECK_BIT_IN_TABLE, 34, 24) /* bc8 pad24 addr32 bits128 */ \ + V(CHECK_LT, 35, 8) /* bc8 pad8 base::uc16 addr32 */ \ + V(CHECK_GT, 36, 8) /* bc8 pad8 base::uc16 addr32 */ \ + V(CHECK_NOT_BACK_REF, 37, 8) /* bc8 reg_idx24 addr32 */ \ + V(CHECK_NOT_BACK_REF_NO_CASE, 38, 8) /* bc8 reg_idx24 addr32 */ \ + V(CHECK_NOT_BACK_REF_NO_CASE_UNICODE, 39, 8) \ + V(CHECK_NOT_BACK_REF_BACKWARD, 40, 8) /* bc8 reg_idx24 addr32 */ \ + V(CHECK_NOT_BACK_REF_NO_CASE_BACKWARD, 41, 8) /* bc8 reg_idx24 addr32 */ \ + V(CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD, 42, 8) \ + V(CHECK_NOT_REGS_EQUAL, 43, 12) /* bc8 regidx24 reg_idx32 addr32 */ \ + V(CHECK_REGISTER_LT, 44, 12) /* bc8 reg_idx24 value32 addr32 */ \ + V(CHECK_REGISTER_GE, 45, 12) /* bc8 reg_idx24 value32 addr32 */ \ + V(CHECK_REGISTER_EQ_POS, 46, 8) /* bc8 reg_idx24 addr32 */ \ + V(CHECK_AT_START, 47, 8) /* bc8 pad24 addr32 */ \ + V(CHECK_NOT_AT_START, 48, 8) /* bc8 offset24 addr32 */ \ + /* Checks if the current position matches top of backtrack stack */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x31 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: 0x00 (unused) Padding */ \ + /* 0x20 - 0x3F: Address of bytecode when current matches tos */ \ + V(CHECK_GREEDY, 49, 8) /* bc8 pad24 addr32 */ \ + /* Advance character pointer by given offset and jump to another bytecode.*/ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x32 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: Number of characters to advance */ \ + /* 0x20 - 0x3F: Address of bytecode to jump to */ \ + V(ADVANCE_CP_AND_GOTO, 50, 8) /* bc8 offset24 addr32 */ \ + V(SET_CURRENT_POSITION_FROM_END, 51, 4) /* bc8 idx24 */ \ + /* Checks if current position + given offset is in range. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07: 0x34 (fixed) Bytecode */ \ + /* 0x08 - 0x1F: Offset from current position */ \ + /* 0x20 - 0x3F: Address of bytecode when position is out of range */ \ + V(CHECK_CURRENT_POSITION, 52, 8) /* bc8 idx24 addr32 */ \ + /* Combination of: */ \ + /* LOAD_CURRENT_CHAR, CHECK_BIT_IN_TABLE and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x35 (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x3F Number of characters to advance */ \ + /* 0x40 - 0xBF Bit Table */ \ + /* 0xC0 - 0xDF Address of bytecode when character is matched */ \ + /* 0xE0 - 0xFF Address of bytecode when no match */ \ + V(SKIP_UNTIL_BIT_IN_TABLE, 53, 32) \ + /* Combination of: */ \ + /* CHECK_CURRENT_POSITION, LOAD_CURRENT_CHAR_UNCHECKED, AND_CHECK_CHAR */ \ + /* and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x36 (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x2F Number of characters to advance */ \ + /* 0x30 - 0x3F Character to match against (after mask applied) */ \ + /* 0x40 - 0x5F: Bitmask bitwise and combined with current character */ \ + /* 0x60 - 0x7F Minimum number of characters this pattern consumes */ \ + /* 0x80 - 0x9F Address of bytecode when character is matched */ \ + /* 0xA0 - 0xBF Address of bytecode when no match */ \ + V(SKIP_UNTIL_CHAR_AND, 54, 24) \ + /* Combination of: */ \ + /* LOAD_CURRENT_CHAR, CHECK_CHAR and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x37 (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x2F Number of characters to advance */ \ + /* 0x30 - 0x3F Character to match */ \ + /* 0x40 - 0x5F Address of bytecode when character is matched */ \ + /* 0x60 - 0x7F Address of bytecode when no match */ \ + V(SKIP_UNTIL_CHAR, 55, 16) \ + /* Combination of: */ \ + /* CHECK_CURRENT_POSITION, LOAD_CURRENT_CHAR_UNCHECKED, CHECK_CHAR */ \ + /* and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x38 (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x2F Number of characters to advance */ \ + /* 0x30 - 0x3F Character to match */ \ + /* 0x40 - 0x5F Minimum number of characters this pattern consumes */ \ + /* 0x60 - 0x7F Address of bytecode when character is matched */ \ + /* 0x80 - 0x9F Address of bytecode when no match */ \ + V(SKIP_UNTIL_CHAR_POS_CHECKED, 56, 20) \ + /* Combination of: */ \ + /* LOAD_CURRENT_CHAR, CHECK_CHAR, CHECK_CHAR and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x39 (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x3F Number of characters to advance */ \ + /* 0x40 - 0x4F Character to match */ \ + /* 0x50 - 0x5F Other Character to match */ \ + /* 0x60 - 0x7F Address of bytecode when either character is matched */ \ + /* 0x80 - 0x9F Address of bytecode when no match */ \ + V(SKIP_UNTIL_CHAR_OR_CHAR, 57, 20) \ + /* Combination of: */ \ + /* LOAD_CURRENT_CHAR, CHECK_GT, CHECK_BIT_IN_TABLE, GOTO and */ \ + /* and ADVANCE_CP_AND_GOTO */ \ + /* Emitted by RegExpBytecodePeepholeOptimization. */ \ + /* Bit Layout: */ \ + /* 0x00 - 0x07 0x3A (fixed) Bytecode */ \ + /* 0x08 - 0x1F Load character offset from current position */ \ + /* 0x20 - 0x2F Number of characters to advance */ \ + /* 0x30 - 0x3F Character to check if it is less than current char */ \ + /* 0x40 - 0xBF Bit Table */ \ + /* 0xC0 - 0xDF Address of bytecode when character is matched */ \ + /* 0xE0 - 0xFF Address of bytecode when no match */ \ + V(SKIP_UNTIL_GT_OR_NOT_BIT_IN_TABLE, 58, 32) + +#define COUNT(...) +1 +static constexpr int kRegExpBytecodeCount = BYTECODE_ITERATOR(COUNT); +#undef COUNT + +// Just making sure we assigned values above properly. They should be +// contiguous, strictly increasing, and start at 0. +// TODO(jgruber): Do not explicitly assign values, instead generate them +// implicitly from the list order. +static_assert(kRegExpBytecodeCount == 59); + +#define DECLARE_BYTECODES(name, code, length) \ + static constexpr int BC_##name = code; +BYTECODE_ITERATOR(DECLARE_BYTECODES) +#undef DECLARE_BYTECODES + +static constexpr int kRegExpBytecodeLengths[] = { +#define DECLARE_BYTECODE_LENGTH(name, code, length) length, + BYTECODE_ITERATOR(DECLARE_BYTECODE_LENGTH) +#undef DECLARE_BYTECODE_LENGTH +}; + +inline constexpr int RegExpBytecodeLength(int bytecode) { + DCHECK(base::IsInRange(bytecode, 0, kRegExpBytecodeCount - 1)); + return kRegExpBytecodeLengths[bytecode]; +} + +static constexpr const char* const kRegExpBytecodeNames[] = { +#define DECLARE_BYTECODE_NAME(name, ...) #name, + BYTECODE_ITERATOR(DECLARE_BYTECODE_NAME) +#undef DECLARE_BYTECODE_NAME +}; + +inline constexpr const char* RegExpBytecodeName(int bytecode) { + DCHECK(base::IsInRange(bytecode, 0, kRegExpBytecodeCount - 1)); + return kRegExpBytecodeNames[bytecode]; +} + +void RegExpBytecodeDisassembleSingle(const byte* code_base, const byte* pc); +void RegExpBytecodeDisassemble(const byte* code_base, int length, + const char* pattern); + +} // namespace internal +} // namespace v8 + +#endif // V8_REGEXP_REGEXP_BYTECODES_H_ |