mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 28 | #include "v8.h" |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 29 | |
| 30 | #if defined(V8_TARGET_ARCH_IA32) |
| 31 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 32 | #include "unicode.h" |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 33 | #include "log.h" |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 34 | #include "regexp-stack.h" |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 35 | #include "macro-assembler.h" |
| 36 | #include "regexp-macro-assembler.h" |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 37 | #include "ia32/regexp-macro-assembler-ia32.h" |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 38 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 39 | namespace v8 { |
| 40 | namespace internal { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 41 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 42 | #ifndef V8_INTERPRETED_REGEXP |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 43 | /* |
| 44 | * This assembler uses the following register assignment convention |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 45 | * - edx : Current character. Must be loaded using LoadCurrentCharacter |
| 46 | * before using any of the dispatch methods. Temporarily stores the |
| 47 | * index of capture start after a matching pass for a global regexp. |
| 48 | * - edi : Current position in input, as negative offset from end of string. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 49 | * Please notice that this is the byte offset, not the character offset! |
| 50 | * - esi : end of input (points to byte after last character in input). |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 51 | * - ebp : Frame pointer. Used to access arguments, local variables and |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 52 | * RegExp registers. |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 53 | * - esp : Points to tip of C stack. |
| 54 | * - ecx : Points to tip of backtrack stack |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 55 | * |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 56 | * The registers eax and ebx are free to use for computations. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 57 | * |
| 58 | * Each call to a public method should retain this convention. |
| 59 | * The stack will have the following structure: |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 60 | * - Isolate* isolate (address of the current isolate) |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 61 | * - direct_call (if 1, direct call from JavaScript code, if 0 |
| 62 | * call through the runtime system) |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 63 | * - stack_area_base (high end of the memory area to use as |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 64 | * backtracking stack) |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 65 | * - capture array size (may fit multiple sets of matches) |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 66 | * - int* capture_array (int[num_saved_registers_], for output). |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 67 | * - end of input (address of end of string) |
| 68 | * - start of input (address of first character in string) |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 69 | * - start index (character index of start) |
| 70 | * - String* input_string (location of a handle containing the string) |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 71 | * --- frame alignment (if applicable) --- |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 72 | * - return address |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 73 | * ebp-> - old ebp |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 74 | * - backup of caller esi |
| 75 | * - backup of caller edi |
| 76 | * - backup of caller ebx |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 77 | * - success counter (only for global regexps to count matches). |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 78 | * - Offset of location before start of input (effectively character |
| 79 | * position -1). Used to initialize capture registers to a non-position. |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 80 | * - register 0 ebp[-4] (only positions must be stored in the first |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 81 | * - register 1 ebp[-8] num_saved_registers_ registers) |
| 82 | * - ... |
| 83 | * |
| 84 | * The first num_saved_registers_ registers are initialized to point to |
| 85 | * "character -1" in the string (i.e., char_size() bytes before the first |
| 86 | * character of the string). The remaining registers starts out as garbage. |
| 87 | * |
| 88 | * The data up to the return address must be placed there by the calling |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 89 | * code, by calling the code entry as cast to a function with the signature: |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 90 | * int (*match)(String* input_string, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 91 | * int start_index, |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 92 | * Address start, |
| 93 | * Address end, |
| 94 | * int* capture_output_array, |
| 95 | * bool at_start, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 96 | * byte* stack_area_base, |
| 97 | * bool direct_call) |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 98 | */ |
| 99 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 100 | #define __ ACCESS_MASM(masm_) |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 101 | |
| 102 | RegExpMacroAssemblerIA32::RegExpMacroAssemblerIA32( |
| 103 | Mode mode, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 104 | int registers_to_save, |
| 105 | Zone* zone) |
| 106 | : NativeRegExpMacroAssembler(zone), |
| 107 | masm_(new MacroAssembler(Isolate::Current(), NULL, kRegExpCodeSize)), |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 108 | mode_(mode), |
| 109 | num_registers_(registers_to_save), |
| 110 | num_saved_registers_(registers_to_save), |
| 111 | entry_label_(), |
| 112 | start_label_(), |
| 113 | success_label_(), |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 114 | backtrack_label_(), |
kasperl@chromium.org | 061ef74 | 2009-02-27 12:16:20 +0000 | [diff] [blame] | 115 | exit_label_() { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 116 | ASSERT_EQ(0, registers_to_save % 2); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 117 | __ jmp(&entry_label_); // We'll write the entry code later. |
| 118 | __ bind(&start_label_); // And then continue from here. |
| 119 | } |
| 120 | |
| 121 | |
| 122 | RegExpMacroAssemblerIA32::~RegExpMacroAssemblerIA32() { |
| 123 | delete masm_; |
| 124 | // Unuse labels in case we throw away the assembler without calling GetCode. |
| 125 | entry_label_.Unuse(); |
| 126 | start_label_.Unuse(); |
| 127 | success_label_.Unuse(); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 128 | backtrack_label_.Unuse(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 129 | exit_label_.Unuse(); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 130 | check_preempt_label_.Unuse(); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 131 | stack_overflow_label_.Unuse(); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | int RegExpMacroAssemblerIA32::stack_limit_slack() { |
| 136 | return RegExpStack::kStackLimitSlack; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | |
| 140 | void RegExpMacroAssemblerIA32::AdvanceCurrentPosition(int by) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 141 | if (by != 0) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 142 | __ add(edi, Immediate(by * char_size())); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 143 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | |
| 147 | void RegExpMacroAssemblerIA32::AdvanceRegister(int reg, int by) { |
| 148 | ASSERT(reg >= 0); |
| 149 | ASSERT(reg < num_registers_); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 150 | if (by != 0) { |
| 151 | __ add(register_location(reg), Immediate(by)); |
| 152 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | |
| 156 | void RegExpMacroAssemblerIA32::Backtrack() { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 157 | CheckPreemption(); |
| 158 | // Pop Code* offset from backtrack stack, add Code* and jump to location. |
| 159 | Pop(ebx); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 160 | __ add(ebx, Immediate(masm_->CodeObject())); |
| 161 | __ jmp(ebx); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | |
| 165 | void RegExpMacroAssemblerIA32::Bind(Label* label) { |
| 166 | __ bind(label); |
| 167 | } |
| 168 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 169 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 170 | void RegExpMacroAssemblerIA32::CheckCharacter(uint32_t c, Label* on_equal) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 171 | __ cmp(current_character(), c); |
| 172 | BranchOrBacktrack(equal, on_equal); |
| 173 | } |
| 174 | |
| 175 | |
| 176 | void RegExpMacroAssemblerIA32::CheckCharacterGT(uc16 limit, Label* on_greater) { |
| 177 | __ cmp(current_character(), limit); |
| 178 | BranchOrBacktrack(greater, on_greater); |
| 179 | } |
| 180 | |
| 181 | |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 182 | void RegExpMacroAssemblerIA32::CheckAtStart(Label* on_at_start) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 183 | Label not_at_start; |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 184 | // Did we start the match at the start of the string at all? |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 185 | __ cmp(Operand(ebp, kStartIndex), Immediate(0)); |
| 186 | BranchOrBacktrack(not_equal, ¬_at_start); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 187 | // If we did, are we still at the start of the input? |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 188 | __ lea(eax, Operand(esi, edi, times_1, 0)); |
| 189 | __ cmp(eax, Operand(ebp, kInputStart)); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 190 | BranchOrBacktrack(equal, on_at_start); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 191 | __ bind(¬_at_start); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 195 | void RegExpMacroAssemblerIA32::CheckNotAtStart(Label* on_not_at_start) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 196 | // Did we start the match at the start of the string at all? |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 197 | __ cmp(Operand(ebp, kStartIndex), Immediate(0)); |
| 198 | BranchOrBacktrack(not_equal, on_not_at_start); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 199 | // If we did, are we still at the start of the input? |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 200 | __ lea(eax, Operand(esi, edi, times_1, 0)); |
| 201 | __ cmp(eax, Operand(ebp, kInputStart)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 202 | BranchOrBacktrack(not_equal, on_not_at_start); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | void RegExpMacroAssemblerIA32::CheckCharacterLT(uc16 limit, Label* on_less) { |
| 207 | __ cmp(current_character(), limit); |
| 208 | BranchOrBacktrack(less, on_less); |
| 209 | } |
| 210 | |
| 211 | |
| 212 | void RegExpMacroAssemblerIA32::CheckCharacters(Vector<const uc16> str, |
| 213 | int cp_offset, |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 214 | Label* on_failure, |
| 215 | bool check_end_of_string) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 216 | #ifdef DEBUG |
| 217 | // If input is ASCII, don't even bother calling here if the string to |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 218 | // match contains a non-ASCII character. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 219 | if (mode_ == ASCII) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 220 | ASSERT(String::IsOneByte(str.start(), str.length())); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 221 | } |
| 222 | #endif |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 223 | int byte_length = str.length() * char_size(); |
| 224 | int byte_offset = cp_offset * char_size(); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 225 | if (check_end_of_string) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 226 | // Check that there are at least str.length() characters left in the input. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 227 | __ cmp(edi, Immediate(-(byte_offset + byte_length))); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 228 | BranchOrBacktrack(greater, on_failure); |
| 229 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 230 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 231 | if (on_failure == NULL) { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 232 | // Instead of inlining a backtrack, (re)use the global backtrack target. |
| 233 | on_failure = &backtrack_label_; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 234 | } |
| 235 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 236 | // Do one character test first to minimize loading for the case that |
| 237 | // we don't match at all (loading more than one character introduces that |
| 238 | // chance of reading unaligned and reading across cache boundaries). |
| 239 | // If the first character matches, expect a larger chance of matching the |
| 240 | // string, and start loading more characters at a time. |
| 241 | if (mode_ == ASCII) { |
| 242 | __ cmpb(Operand(esi, edi, times_1, byte_offset), |
| 243 | static_cast<int8_t>(str[0])); |
| 244 | } else { |
| 245 | // Don't use 16-bit immediate. The size changing prefix throws off |
| 246 | // pre-decoding. |
| 247 | __ movzx_w(eax, |
| 248 | Operand(esi, edi, times_1, byte_offset)); |
| 249 | __ cmp(eax, static_cast<int32_t>(str[0])); |
| 250 | } |
| 251 | BranchOrBacktrack(not_equal, on_failure); |
| 252 | |
| 253 | __ lea(ebx, Operand(esi, edi, times_1, 0)); |
| 254 | for (int i = 1, n = str.length(); i < n;) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 255 | if (mode_ == ASCII) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 256 | if (i <= n - 4) { |
| 257 | int combined_chars = |
| 258 | (static_cast<uint32_t>(str[i + 0]) << 0) | |
| 259 | (static_cast<uint32_t>(str[i + 1]) << 8) | |
| 260 | (static_cast<uint32_t>(str[i + 2]) << 16) | |
| 261 | (static_cast<uint32_t>(str[i + 3]) << 24); |
| 262 | __ cmp(Operand(ebx, byte_offset + i), Immediate(combined_chars)); |
| 263 | i += 4; |
| 264 | } else { |
| 265 | __ cmpb(Operand(ebx, byte_offset + i), |
| 266 | static_cast<int8_t>(str[i])); |
| 267 | i += 1; |
| 268 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 269 | } else { |
| 270 | ASSERT(mode_ == UC16); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 271 | if (i <= n - 2) { |
| 272 | __ cmp(Operand(ebx, byte_offset + i * sizeof(uc16)), |
| 273 | Immediate(*reinterpret_cast<const int*>(&str[i]))); |
| 274 | i += 2; |
| 275 | } else { |
| 276 | // Avoid a 16-bit immediate operation. It uses the length-changing |
| 277 | // 0x66 prefix which causes pre-decoder misprediction and pipeline |
| 278 | // stalls. See |
| 279 | // "Intel(R) 64 and IA-32 Architectures Optimization Reference Manual" |
| 280 | // (248966.pdf) section 3.4.2.3 "Length-Changing Prefixes (LCP)" |
| 281 | __ movzx_w(eax, |
| 282 | Operand(ebx, byte_offset + i * sizeof(uc16))); |
| 283 | __ cmp(eax, static_cast<int32_t>(str[i])); |
| 284 | i += 1; |
| 285 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 286 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 287 | BranchOrBacktrack(not_equal, on_failure); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 288 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 292 | void RegExpMacroAssemblerIA32::CheckGreedyLoop(Label* on_equal) { |
| 293 | Label fallthrough; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 294 | __ cmp(edi, Operand(backtrack_stackpointer(), 0)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 295 | __ j(not_equal, &fallthrough); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 296 | __ add(backtrack_stackpointer(), Immediate(kPointerSize)); // Pop. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 297 | BranchOrBacktrack(no_condition, on_equal); |
| 298 | __ bind(&fallthrough); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | |
| 302 | void RegExpMacroAssemblerIA32::CheckNotBackReferenceIgnoreCase( |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 303 | int start_reg, |
| 304 | Label* on_no_match) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 305 | Label fallthrough; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 306 | __ mov(edx, register_location(start_reg)); // Index of start of capture |
| 307 | __ mov(ebx, register_location(start_reg + 1)); // Index of end of capture |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 308 | __ sub(ebx, edx); // Length of capture. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 309 | |
| 310 | // The length of a capture should not be negative. This can only happen |
| 311 | // if the end of the capture is unrecorded, or at a point earlier than |
| 312 | // the start of the capture. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 313 | BranchOrBacktrack(less, on_no_match); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 314 | |
| 315 | // If length is zero, either the capture is empty or it is completely |
| 316 | // uncaptured. In either case succeed immediately. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 317 | __ j(equal, &fallthrough); |
| 318 | |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 319 | // Check that there are sufficient characters left in the input. |
| 320 | __ mov(eax, edi); |
| 321 | __ add(eax, ebx); |
| 322 | BranchOrBacktrack(greater, on_no_match); |
| 323 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 324 | if (mode_ == ASCII) { |
| 325 | Label success; |
| 326 | Label fail; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 327 | Label loop_increment; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 328 | // Save register contents to make the registers available below. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 329 | __ push(edi); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 330 | __ push(backtrack_stackpointer()); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 331 | // After this, the eax, ecx, and edi registers are available. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 332 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 333 | __ add(edx, esi); // Start of capture |
| 334 | __ add(edi, esi); // Start of text to match against capture. |
| 335 | __ add(ebx, edi); // End of text to match against capture. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 336 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 337 | Label loop; |
| 338 | __ bind(&loop); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 339 | __ movzx_b(eax, Operand(edi, 0)); |
| 340 | __ cmpb_al(Operand(edx, 0)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 341 | __ j(equal, &loop_increment); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 342 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 343 | // Mismatch, try case-insensitive match (converting letters to lower-case). |
| 344 | __ or_(eax, 0x20); // Convert match character to lower-case. |
| 345 | __ lea(ecx, Operand(eax, -'a')); |
| 346 | __ cmp(ecx, static_cast<int32_t>('z' - 'a')); // Is eax a lowercase letter? |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 347 | Label convert_capture; |
| 348 | __ j(below_equal, &convert_capture); // In range 'a'-'z'. |
| 349 | // Latin-1: Check for values in range [224,254] but not 247. |
| 350 | __ sub(ecx, Immediate(224 - 'a')); |
| 351 | __ cmp(ecx, Immediate(254 - 224)); |
| 352 | __ j(above, &fail); // Weren't Latin-1 letters. |
| 353 | __ cmp(ecx, Immediate(247 - 224)); // Check for 247. |
| 354 | __ j(equal, &fail); |
| 355 | __ bind(&convert_capture); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 356 | // Also convert capture character. |
| 357 | __ movzx_b(ecx, Operand(edx, 0)); |
| 358 | __ or_(ecx, 0x20); |
| 359 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 360 | __ cmp(eax, ecx); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 361 | __ j(not_equal, &fail); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 362 | |
| 363 | __ bind(&loop_increment); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 364 | // Increment pointers into match and capture strings. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 365 | __ add(edx, Immediate(1)); |
| 366 | __ add(edi, Immediate(1)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 367 | // Compare to end of match, and loop if not done. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 368 | __ cmp(edi, ebx); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 369 | __ j(below, &loop); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 370 | __ jmp(&success); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 371 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 372 | __ bind(&fail); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 373 | // Restore original values before failing. |
| 374 | __ pop(backtrack_stackpointer()); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 375 | __ pop(edi); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 376 | BranchOrBacktrack(no_condition, on_no_match); |
| 377 | |
| 378 | __ bind(&success); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 379 | // Restore original value before continuing. |
| 380 | __ pop(backtrack_stackpointer()); |
| 381 | // Drop original value of character position. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 382 | __ add(esp, Immediate(kPointerSize)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 383 | // Compute new value of character position after the matched part. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 384 | __ sub(edi, esi); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 385 | } else { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 386 | ASSERT(mode_ == UC16); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 387 | // Save registers before calling C function. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 388 | __ push(esi); |
| 389 | __ push(edi); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 390 | __ push(backtrack_stackpointer()); |
| 391 | __ push(ebx); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 392 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 393 | static const int argument_count = 4; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 394 | __ PrepareCallCFunction(argument_count, ecx); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 395 | // Put arguments into allocated stack area, last argument highest on stack. |
| 396 | // Parameters are |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 397 | // Address byte_offset1 - Address captured substring's start. |
| 398 | // Address byte_offset2 - Address of current character position. |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 399 | // size_t byte_length - length of capture in bytes(!) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 400 | // Isolate* isolate |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 401 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 402 | // Set isolate. |
| 403 | __ mov(Operand(esp, 3 * kPointerSize), |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 404 | Immediate(ExternalReference::isolate_address(isolate()))); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 405 | // Set byte_length. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 406 | __ mov(Operand(esp, 2 * kPointerSize), ebx); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 407 | // Set byte_offset2. |
| 408 | // Found by adding negative string-end offset of current position (edi) |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 409 | // to end of string. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 410 | __ add(edi, esi); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 411 | __ mov(Operand(esp, 1 * kPointerSize), edi); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 412 | // Set byte_offset1. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 413 | // Start of capture, where edx already holds string-end negative offset. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 414 | __ add(edx, esi); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 415 | __ mov(Operand(esp, 0 * kPointerSize), edx); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 416 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 417 | { |
| 418 | AllowExternalCallThatCantCauseGC scope(masm_); |
| 419 | ExternalReference compare = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 420 | ExternalReference::re_case_insensitive_compare_uc16(isolate()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 421 | __ CallCFunction(compare, argument_count); |
| 422 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 423 | // Pop original values before reacting on result value. |
| 424 | __ pop(ebx); |
| 425 | __ pop(backtrack_stackpointer()); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 426 | __ pop(edi); |
| 427 | __ pop(esi); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 428 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 429 | // Check if function returned non-zero for success or zero for failure. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 430 | __ or_(eax, eax); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 431 | BranchOrBacktrack(zero, on_no_match); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 432 | // On success, increment position by length of capture. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 433 | __ add(edi, ebx); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 434 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 435 | __ bind(&fallthrough); |
| 436 | } |
| 437 | |
| 438 | |
| 439 | void RegExpMacroAssemblerIA32::CheckNotBackReference( |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 440 | int start_reg, |
| 441 | Label* on_no_match) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 442 | Label fallthrough; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 443 | Label success; |
| 444 | Label fail; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 445 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 446 | // Find length of back-referenced capture. |
| 447 | __ mov(edx, register_location(start_reg)); |
| 448 | __ mov(eax, register_location(start_reg + 1)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 449 | __ sub(eax, edx); // Length to check. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 450 | // Fail on partial or illegal capture (start of capture after end of capture). |
| 451 | BranchOrBacktrack(less, on_no_match); |
| 452 | // Succeed on empty capture (including no capture) |
| 453 | __ j(equal, &fallthrough); |
| 454 | |
| 455 | // Check that there are sufficient characters left in the input. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 456 | __ mov(ebx, edi); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 457 | __ add(ebx, eax); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 458 | BranchOrBacktrack(greater, on_no_match); |
| 459 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 460 | // Save register to make it available below. |
| 461 | __ push(backtrack_stackpointer()); |
| 462 | |
| 463 | // Compute pointers to match string and capture string |
| 464 | __ lea(ebx, Operand(esi, edi, times_1, 0)); // Start of match. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 465 | __ add(edx, esi); // Start of capture. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 466 | __ lea(ecx, Operand(eax, ebx, times_1, 0)); // End of match |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 467 | |
| 468 | Label loop; |
| 469 | __ bind(&loop); |
| 470 | if (mode_ == ASCII) { |
| 471 | __ movzx_b(eax, Operand(edx, 0)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 472 | __ cmpb_al(Operand(ebx, 0)); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 473 | } else { |
| 474 | ASSERT(mode_ == UC16); |
| 475 | __ movzx_w(eax, Operand(edx, 0)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 476 | __ cmpw_ax(Operand(ebx, 0)); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 477 | } |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 478 | __ j(not_equal, &fail); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 479 | // Increment pointers into capture and match string. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 480 | __ add(edx, Immediate(char_size())); |
| 481 | __ add(ebx, Immediate(char_size())); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 482 | // Check if we have reached end of match area. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 483 | __ cmp(ebx, ecx); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 484 | __ j(below, &loop); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 485 | __ jmp(&success); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 486 | |
| 487 | __ bind(&fail); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 488 | // Restore backtrack stackpointer. |
| 489 | __ pop(backtrack_stackpointer()); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 490 | BranchOrBacktrack(no_condition, on_no_match); |
| 491 | |
| 492 | __ bind(&success); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 493 | // Move current character position to position after match. |
| 494 | __ mov(edi, ecx); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 495 | __ sub(edi, esi); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 496 | // Restore backtrack stackpointer. |
| 497 | __ pop(backtrack_stackpointer()); |
| 498 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 499 | __ bind(&fallthrough); |
| 500 | } |
| 501 | |
| 502 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 503 | void RegExpMacroAssemblerIA32::CheckNotCharacter(uint32_t c, |
| 504 | Label* on_not_equal) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 505 | __ cmp(current_character(), c); |
| 506 | BranchOrBacktrack(not_equal, on_not_equal); |
| 507 | } |
| 508 | |
| 509 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 510 | void RegExpMacroAssemblerIA32::CheckCharacterAfterAnd(uint32_t c, |
| 511 | uint32_t mask, |
| 512 | Label* on_equal) { |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 513 | if (c == 0) { |
| 514 | __ test(current_character(), Immediate(mask)); |
| 515 | } else { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 516 | __ mov(eax, mask); |
| 517 | __ and_(eax, current_character()); |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 518 | __ cmp(eax, c); |
| 519 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 520 | BranchOrBacktrack(equal, on_equal); |
| 521 | } |
| 522 | |
| 523 | |
| 524 | void RegExpMacroAssemblerIA32::CheckNotCharacterAfterAnd(uint32_t c, |
| 525 | uint32_t mask, |
| 526 | Label* on_not_equal) { |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 527 | if (c == 0) { |
| 528 | __ test(current_character(), Immediate(mask)); |
| 529 | } else { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 530 | __ mov(eax, mask); |
| 531 | __ and_(eax, current_character()); |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 532 | __ cmp(eax, c); |
| 533 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 534 | BranchOrBacktrack(not_equal, on_not_equal); |
| 535 | } |
| 536 | |
| 537 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 538 | void RegExpMacroAssemblerIA32::CheckNotCharacterAfterMinusAnd( |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 539 | uc16 c, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 540 | uc16 minus, |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 541 | uc16 mask, |
| 542 | Label* on_not_equal) { |
yangguo@chromium.org | 154ff99 | 2012-03-13 08:09:54 +0000 | [diff] [blame] | 543 | ASSERT(minus < String::kMaxUtf16CodeUnit); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 544 | __ lea(eax, Operand(current_character(), -minus)); |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 545 | if (c == 0) { |
| 546 | __ test(eax, Immediate(mask)); |
| 547 | } else { |
| 548 | __ and_(eax, mask); |
| 549 | __ cmp(eax, c); |
| 550 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 551 | BranchOrBacktrack(not_equal, on_not_equal); |
| 552 | } |
| 553 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 554 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 555 | void RegExpMacroAssemblerIA32::CheckCharacterInRange( |
| 556 | uc16 from, |
| 557 | uc16 to, |
| 558 | Label* on_in_range) { |
| 559 | __ lea(eax, Operand(current_character(), -from)); |
| 560 | __ cmp(eax, to - from); |
| 561 | BranchOrBacktrack(below_equal, on_in_range); |
| 562 | } |
| 563 | |
| 564 | |
| 565 | void RegExpMacroAssemblerIA32::CheckCharacterNotInRange( |
| 566 | uc16 from, |
| 567 | uc16 to, |
| 568 | Label* on_not_in_range) { |
| 569 | __ lea(eax, Operand(current_character(), -from)); |
| 570 | __ cmp(eax, to - from); |
| 571 | BranchOrBacktrack(above, on_not_in_range); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | void RegExpMacroAssemblerIA32::CheckBitInTable( |
| 576 | Handle<ByteArray> table, |
| 577 | Label* on_bit_set) { |
| 578 | __ mov(eax, Immediate(table)); |
| 579 | Register index = current_character(); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 580 | if (mode_ != ASCII || kTableMask != String::kMaxOneByteCharCode) { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 581 | __ mov(ebx, kTableSize - 1); |
| 582 | __ and_(ebx, current_character()); |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 583 | index = ebx; |
| 584 | } |
| 585 | __ cmpb(FieldOperand(eax, index, times_1, ByteArray::kHeaderSize), 0); |
| 586 | BranchOrBacktrack(not_equal, on_bit_set); |
| 587 | } |
| 588 | |
| 589 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 590 | bool RegExpMacroAssemblerIA32::CheckSpecialCharacterClass(uc16 type, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 591 | Label* on_no_match) { |
| 592 | // Range checks (c in min..max) are generally implemented by an unsigned |
| 593 | // (c - min) <= (max - min) check |
| 594 | switch (type) { |
| 595 | case 's': |
| 596 | // Match space-characters |
| 597 | if (mode_ == ASCII) { |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 598 | // One byte space characters are '\t'..'\r', ' ' and \u00a0. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 599 | Label success; |
| 600 | __ cmp(current_character(), ' '); |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 601 | __ j(equal, &success, Label::kNear); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 602 | // Check range 0x09..0x0d |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 603 | __ lea(eax, Operand(current_character(), -'\t')); |
| 604 | __ cmp(eax, '\r' - '\t'); |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 605 | __ j(below_equal, &success, Label::kNear); |
| 606 | // \u00a0 (NBSP). |
| 607 | __ cmp(eax, 0x00a0 - '\t'); |
| 608 | BranchOrBacktrack(not_equal, on_no_match); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 609 | __ bind(&success); |
| 610 | return true; |
| 611 | } |
| 612 | return false; |
| 613 | case 'S': |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 614 | // The emitted code for generic character classes is good enough. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 615 | return false; |
| 616 | case 'd': |
| 617 | // Match ASCII digits ('0'..'9') |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 618 | __ lea(eax, Operand(current_character(), -'0')); |
| 619 | __ cmp(eax, '9' - '0'); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 620 | BranchOrBacktrack(above, on_no_match); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 621 | return true; |
| 622 | case 'D': |
| 623 | // Match non ASCII-digits |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 624 | __ lea(eax, Operand(current_character(), -'0')); |
| 625 | __ cmp(eax, '9' - '0'); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 626 | BranchOrBacktrack(below_equal, on_no_match); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 627 | return true; |
| 628 | case '.': { |
| 629 | // Match non-newlines (not 0x0a('\n'), 0x0d('\r'), 0x2028 and 0x2029) |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 630 | __ mov(eax, current_character()); |
| 631 | __ xor_(eax, Immediate(0x01)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 632 | // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 633 | __ sub(eax, Immediate(0x0b)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 634 | __ cmp(eax, 0x0c - 0x0b); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 635 | BranchOrBacktrack(below_equal, on_no_match); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 636 | if (mode_ == UC16) { |
| 637 | // Compare original value to 0x2028 and 0x2029, using the already |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 638 | // computed (current_char ^ 0x01 - 0x0b). I.e., check for |
| 639 | // 0x201d (0x2028 - 0x0b) or 0x201e. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 640 | __ sub(eax, Immediate(0x2028 - 0x0b)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 641 | __ cmp(eax, 0x2029 - 0x2028); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 642 | BranchOrBacktrack(below_equal, on_no_match); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 643 | } |
| 644 | return true; |
| 645 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 646 | case 'w': { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 647 | if (mode_ != ASCII) { |
| 648 | // Table is 128 entries, so all ASCII characters can be tested. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 649 | __ cmp(current_character(), Immediate('z')); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 650 | BranchOrBacktrack(above, on_no_match); |
| 651 | } |
| 652 | ASSERT_EQ(0, word_character_map[0]); // Character '\0' is not a word char. |
| 653 | ExternalReference word_map = ExternalReference::re_word_character_map(); |
| 654 | __ test_b(current_character(), |
| 655 | Operand::StaticArray(current_character(), times_1, word_map)); |
| 656 | BranchOrBacktrack(zero, on_no_match); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 657 | return true; |
| 658 | } |
| 659 | case 'W': { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 660 | Label done; |
| 661 | if (mode_ != ASCII) { |
| 662 | // Table is 128 entries, so all ASCII characters can be tested. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 663 | __ cmp(current_character(), Immediate('z')); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 664 | __ j(above, &done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 665 | } |
| 666 | ASSERT_EQ(0, word_character_map[0]); // Character '\0' is not a word char. |
| 667 | ExternalReference word_map = ExternalReference::re_word_character_map(); |
| 668 | __ test_b(current_character(), |
| 669 | Operand::StaticArray(current_character(), times_1, word_map)); |
| 670 | BranchOrBacktrack(not_zero, on_no_match); |
| 671 | if (mode_ != ASCII) { |
| 672 | __ bind(&done); |
| 673 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 674 | return true; |
| 675 | } |
| 676 | // Non-standard classes (with no syntactic shorthand) used internally. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 677 | case '*': |
| 678 | // Match any character. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 679 | return true; |
| 680 | case 'n': { |
| 681 | // Match newlines (0x0a('\n'), 0x0d('\r'), 0x2028 or 0x2029). |
| 682 | // The opposite of '.'. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 683 | __ mov(eax, current_character()); |
| 684 | __ xor_(eax, Immediate(0x01)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 685 | // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 686 | __ sub(eax, Immediate(0x0b)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 687 | __ cmp(eax, 0x0c - 0x0b); |
| 688 | if (mode_ == ASCII) { |
| 689 | BranchOrBacktrack(above, on_no_match); |
| 690 | } else { |
| 691 | Label done; |
| 692 | BranchOrBacktrack(below_equal, &done); |
| 693 | ASSERT_EQ(UC16, mode_); |
| 694 | // Compare original value to 0x2028 and 0x2029, using the already |
| 695 | // computed (current_char ^ 0x01 - 0x0b). I.e., check for |
| 696 | // 0x201d (0x2028 - 0x0b) or 0x201e. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 697 | __ sub(eax, Immediate(0x2028 - 0x0b)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 698 | __ cmp(eax, 1); |
| 699 | BranchOrBacktrack(above, on_no_match); |
| 700 | __ bind(&done); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 701 | } |
| 702 | return true; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 703 | } |
| 704 | // No custom implementation (yet): s(UC16), S(UC16). |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 705 | default: |
| 706 | return false; |
| 707 | } |
| 708 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 709 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 710 | |
| 711 | void RegExpMacroAssemblerIA32::Fail() { |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 712 | STATIC_ASSERT(FAILURE == 0); // Return value for failure is zero. |
| 713 | if (!global()) { |
| 714 | __ Set(eax, Immediate(FAILURE)); |
| 715 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 716 | __ jmp(&exit_label_); |
| 717 | } |
| 718 | |
| 719 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 720 | Handle<HeapObject> RegExpMacroAssemblerIA32::GetCode(Handle<String> source) { |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 721 | Label return_eax; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 722 | // Finalize code - write the entry point code now we know how many |
| 723 | // registers we need. |
| 724 | |
| 725 | // Entry code: |
| 726 | __ bind(&entry_label_); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 727 | |
| 728 | // Tell the system that we have a stack frame. Because the type is MANUAL, no |
| 729 | // code is generated. |
| 730 | FrameScope scope(masm_, StackFrame::MANUAL); |
| 731 | |
| 732 | // Actually emit code to start a new stack frame. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 733 | __ push(ebp); |
| 734 | __ mov(ebp, esp); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 735 | // Save callee-save registers. Order here should correspond to order of |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 736 | // kBackup_ebx etc. |
| 737 | __ push(esi); |
| 738 | __ push(edi); |
| 739 | __ push(ebx); // Callee-save on MacOS. |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 740 | __ push(Immediate(0)); // Number of successful matches in a global regexp. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 741 | __ push(Immediate(0)); // Make room for "input start - 1" constant. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 742 | |
| 743 | // Check if we have space on the stack for registers. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 744 | Label stack_limit_hit; |
| 745 | Label stack_ok; |
| 746 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 747 | ExternalReference stack_limit = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 748 | ExternalReference::address_of_stack_limit(isolate()); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 749 | __ mov(ecx, esp); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 750 | __ sub(ecx, Operand::StaticVariable(stack_limit)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 751 | // Handle it if the stack pointer is already below the stack limit. |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 752 | __ j(below_equal, &stack_limit_hit); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 753 | // Check if there is room for the variable number of registers above |
| 754 | // the stack limit. |
| 755 | __ cmp(ecx, num_registers_ * kPointerSize); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 756 | __ j(above_equal, &stack_ok); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 757 | // Exit with OutOfMemory exception. There is not enough space on the stack |
| 758 | // for our working registers. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 759 | __ mov(eax, EXCEPTION); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 760 | __ jmp(&return_eax); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 761 | |
| 762 | __ bind(&stack_limit_hit); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 763 | CallCheckStackGuardState(ebx); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 764 | __ or_(eax, eax); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 765 | // If returned value is non-zero, we exit with the returned value as result. |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 766 | __ j(not_zero, &return_eax); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 767 | |
| 768 | __ bind(&stack_ok); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 769 | // Load start index for later use. |
| 770 | __ mov(ebx, Operand(ebp, kStartIndex)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 771 | |
| 772 | // Allocate space on stack for registers. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 773 | __ sub(esp, Immediate(num_registers_ * kPointerSize)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 774 | // Load string length. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 775 | __ mov(esi, Operand(ebp, kInputEnd)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 776 | // Load input position. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 777 | __ mov(edi, Operand(ebp, kInputStart)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 778 | // Set up edi to be negative offset from string end. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 779 | __ sub(edi, esi); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 780 | |
| 781 | // Set eax to address of char before start of the string. |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 782 | // (effectively string position -1). |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 783 | __ neg(ebx); |
| 784 | if (mode_ == UC16) { |
| 785 | __ lea(eax, Operand(edi, ebx, times_2, -char_size())); |
| 786 | } else { |
| 787 | __ lea(eax, Operand(edi, ebx, times_1, -char_size())); |
| 788 | } |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 789 | // Store this value in a local variable, for use when clearing |
| 790 | // position registers. |
| 791 | __ mov(Operand(ebp, kInputStartMinusOne), eax); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 792 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 793 | #ifdef WIN32 |
| 794 | // Ensure that we write to each stack page, in order. Skipping a page |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 795 | // on Windows can cause segmentation faults. Assuming page size is 4k. |
| 796 | const int kPageSize = 4096; |
| 797 | const int kRegistersPerPage = kPageSize / kPointerSize; |
| 798 | for (int i = num_saved_registers_ + kRegistersPerPage - 1; |
| 799 | i < num_registers_; |
| 800 | i += kRegistersPerPage) { |
| 801 | __ mov(register_location(i), eax); // One write every page. |
| 802 | } |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 803 | #endif // WIN32 |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 804 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 805 | Label load_char_start_regexp, start_regexp; |
| 806 | // Load newline if index is at start, previous character otherwise. |
| 807 | __ cmp(Operand(ebp, kStartIndex), Immediate(0)); |
| 808 | __ j(not_equal, &load_char_start_regexp, Label::kNear); |
| 809 | __ mov(current_character(), '\n'); |
| 810 | __ jmp(&start_regexp, Label::kNear); |
| 811 | |
| 812 | // Global regexp restarts matching here. |
| 813 | __ bind(&load_char_start_regexp); |
| 814 | // Load previous char as initial value of current character register. |
| 815 | LoadCurrentCharacterUnchecked(-1, 1); |
| 816 | __ bind(&start_regexp); |
| 817 | |
| 818 | // Initialize on-stack registers. |
| 819 | if (num_saved_registers_ > 0) { // Always is, if generated from a regexp. |
| 820 | // Fill saved registers with initial value = start offset - 1 |
| 821 | // Fill in stack push order, to avoid accessing across an unwritten |
| 822 | // page (a problem on Windows). |
| 823 | if (num_saved_registers_ > 8) { |
| 824 | __ mov(ecx, kRegisterZero); |
| 825 | Label init_loop; |
| 826 | __ bind(&init_loop); |
| 827 | __ mov(Operand(ebp, ecx, times_1, 0), eax); |
| 828 | __ sub(ecx, Immediate(kPointerSize)); |
| 829 | __ cmp(ecx, kRegisterZero - num_saved_registers_ * kPointerSize); |
| 830 | __ j(greater, &init_loop); |
| 831 | } else { // Unroll the loop. |
| 832 | for (int i = 0; i < num_saved_registers_; i++) { |
| 833 | __ mov(register_location(i), eax); |
| 834 | } |
| 835 | } |
| 836 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 837 | |
| 838 | // Initialize backtrack stack pointer. |
| 839 | __ mov(backtrack_stackpointer(), Operand(ebp, kStackHighEnd)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 840 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 841 | __ jmp(&start_label_); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 842 | |
| 843 | // Exit code: |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 844 | if (success_label_.is_linked()) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 845 | // Save captures when successful. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 846 | __ bind(&success_label_); |
| 847 | if (num_saved_registers_ > 0) { |
| 848 | // copy captures to output |
| 849 | __ mov(ebx, Operand(ebp, kRegisterOutput)); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 850 | __ mov(ecx, Operand(ebp, kInputEnd)); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 851 | __ mov(edx, Operand(ebp, kStartIndex)); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 852 | __ sub(ecx, Operand(ebp, kInputStart)); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 853 | if (mode_ == UC16) { |
| 854 | __ lea(ecx, Operand(ecx, edx, times_2, 0)); |
| 855 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 856 | __ add(ecx, edx); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 857 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 858 | for (int i = 0; i < num_saved_registers_; i++) { |
| 859 | __ mov(eax, register_location(i)); |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 860 | if (i == 0 && global_with_zero_length_check()) { |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 861 | // Keep capture start in edx for the zero-length check later. |
| 862 | __ mov(edx, eax); |
| 863 | } |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 864 | // Convert to index from start of string, not end. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 865 | __ add(eax, ecx); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 866 | if (mode_ == UC16) { |
| 867 | __ sar(eax, 1); // Convert byte index to character index. |
| 868 | } |
| 869 | __ mov(Operand(ebx, i * kPointerSize), eax); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 870 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 871 | } |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 872 | |
| 873 | if (global()) { |
| 874 | // Restart matching if the regular expression is flagged as global. |
| 875 | // Increment success counter. |
| 876 | __ inc(Operand(ebp, kSuccessfulCaptures)); |
| 877 | // Capture results have been stored, so the number of remaining global |
| 878 | // output registers is reduced by the number of stored captures. |
| 879 | __ mov(ecx, Operand(ebp, kNumOutputRegisters)); |
| 880 | __ sub(ecx, Immediate(num_saved_registers_)); |
| 881 | // Check whether we have enough room for another set of capture results. |
| 882 | __ cmp(ecx, Immediate(num_saved_registers_)); |
| 883 | __ j(less, &exit_label_); |
| 884 | |
| 885 | __ mov(Operand(ebp, kNumOutputRegisters), ecx); |
| 886 | // Advance the location for output. |
| 887 | __ add(Operand(ebp, kRegisterOutput), |
| 888 | Immediate(num_saved_registers_ * kPointerSize)); |
| 889 | |
| 890 | // Prepare eax to initialize registers with its value in the next run. |
| 891 | __ mov(eax, Operand(ebp, kInputStartMinusOne)); |
| 892 | |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 893 | if (global_with_zero_length_check()) { |
| 894 | // Special case for zero-length matches. |
| 895 | // edx: capture start index |
| 896 | __ cmp(edi, edx); |
| 897 | // Not a zero-length match, restart. |
| 898 | __ j(not_equal, &load_char_start_regexp); |
| 899 | // edi (offset from the end) is zero if we already reached the end. |
| 900 | __ test(edi, edi); |
| 901 | __ j(zero, &exit_label_, Label::kNear); |
| 902 | // Advance current position after a zero-length match. |
| 903 | if (mode_ == UC16) { |
| 904 | __ add(edi, Immediate(2)); |
| 905 | } else { |
| 906 | __ inc(edi); |
| 907 | } |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 908 | } |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 909 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 910 | __ jmp(&load_char_start_regexp); |
| 911 | } else { |
| 912 | __ mov(eax, Immediate(SUCCESS)); |
| 913 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 914 | } |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 915 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 916 | __ bind(&exit_label_); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 917 | if (global()) { |
| 918 | // Return the number of successful captures. |
| 919 | __ mov(eax, Operand(ebp, kSuccessfulCaptures)); |
| 920 | } |
| 921 | |
| 922 | __ bind(&return_eax); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 923 | // Skip esp past regexp registers. |
| 924 | __ lea(esp, Operand(ebp, kBackup_ebx)); |
| 925 | // Restore callee-save registers. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 926 | __ pop(ebx); |
| 927 | __ pop(edi); |
| 928 | __ pop(esi); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 929 | // Exit function frame, restore previous one. |
| 930 | __ pop(ebp); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 931 | __ ret(0); |
| 932 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 933 | // Backtrack code (branch target for conditional backtracks). |
| 934 | if (backtrack_label_.is_linked()) { |
| 935 | __ bind(&backtrack_label_); |
| 936 | Backtrack(); |
| 937 | } |
| 938 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 939 | Label exit_with_exception; |
| 940 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 941 | // Preempt-code |
| 942 | if (check_preempt_label_.is_linked()) { |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 943 | SafeCallTarget(&check_preempt_label_); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 944 | |
| 945 | __ push(backtrack_stackpointer()); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 946 | __ push(edi); |
| 947 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 948 | CallCheckStackGuardState(ebx); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 949 | __ or_(eax, eax); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 950 | // If returning non-zero, we should end execution with the given |
| 951 | // result as return value. |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 952 | __ j(not_zero, &return_eax); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 953 | |
| 954 | __ pop(edi); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 955 | __ pop(backtrack_stackpointer()); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 956 | // String might have moved: Reload esi from frame. |
| 957 | __ mov(esi, Operand(ebp, kInputEnd)); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 958 | SafeReturn(); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 959 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 960 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 961 | // Backtrack stack overflow code. |
| 962 | if (stack_overflow_label_.is_linked()) { |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 963 | SafeCallTarget(&stack_overflow_label_); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 964 | // Reached if the backtrack-stack limit has been hit. |
| 965 | |
| 966 | Label grow_failed; |
| 967 | // Save registers before calling C function |
| 968 | __ push(esi); |
| 969 | __ push(edi); |
| 970 | |
| 971 | // Call GrowStack(backtrack_stackpointer()) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 972 | static const int num_arguments = 3; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 973 | __ PrepareCallCFunction(num_arguments, ebx); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 974 | __ mov(Operand(esp, 2 * kPointerSize), |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 975 | Immediate(ExternalReference::isolate_address(isolate()))); |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 976 | __ lea(eax, Operand(ebp, kStackHighEnd)); |
| 977 | __ mov(Operand(esp, 1 * kPointerSize), eax); |
| 978 | __ mov(Operand(esp, 0 * kPointerSize), backtrack_stackpointer()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 979 | ExternalReference grow_stack = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 980 | ExternalReference::re_grow_stack(isolate()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 981 | __ CallCFunction(grow_stack, num_arguments); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 982 | // If return NULL, we have failed to grow the stack, and |
| 983 | // must exit with a stack-overflow exception. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 984 | __ or_(eax, eax); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 985 | __ j(equal, &exit_with_exception); |
| 986 | // Otherwise use return value as new stack pointer. |
| 987 | __ mov(backtrack_stackpointer(), eax); |
| 988 | // Restore saved registers and continue. |
| 989 | __ pop(edi); |
| 990 | __ pop(esi); |
| 991 | SafeReturn(); |
| 992 | } |
| 993 | |
| 994 | if (exit_with_exception.is_linked()) { |
| 995 | // If any of the code above needed to exit with an exception. |
| 996 | __ bind(&exit_with_exception); |
| 997 | // Exit with Result EXCEPTION(-1) to signal thrown exception. |
| 998 | __ mov(eax, EXCEPTION); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 999 | __ jmp(&return_eax); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1000 | } |
| 1001 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1002 | CodeDesc code_desc; |
| 1003 | masm_->GetCode(&code_desc); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1004 | Handle<Code> code = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1005 | isolate()->factory()->NewCode(code_desc, |
| 1006 | Code::ComputeFlags(Code::REGEXP), |
| 1007 | masm_->CodeObject()); |
| 1008 | PROFILE(isolate(), RegExpCodeCreateEvent(*code, *source)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1009 | return Handle<HeapObject>::cast(code); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1010 | } |
| 1011 | |
| 1012 | |
| 1013 | void RegExpMacroAssemblerIA32::GoTo(Label* to) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 1014 | BranchOrBacktrack(no_condition, to); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | |
| 1018 | void RegExpMacroAssemblerIA32::IfRegisterGE(int reg, |
| 1019 | int comparand, |
| 1020 | Label* if_ge) { |
| 1021 | __ cmp(register_location(reg), Immediate(comparand)); |
| 1022 | BranchOrBacktrack(greater_equal, if_ge); |
| 1023 | } |
| 1024 | |
| 1025 | |
| 1026 | void RegExpMacroAssemblerIA32::IfRegisterLT(int reg, |
| 1027 | int comparand, |
| 1028 | Label* if_lt) { |
| 1029 | __ cmp(register_location(reg), Immediate(comparand)); |
| 1030 | BranchOrBacktrack(less, if_lt); |
| 1031 | } |
| 1032 | |
| 1033 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1034 | void RegExpMacroAssemblerIA32::IfRegisterEqPos(int reg, |
| 1035 | Label* if_eq) { |
| 1036 | __ cmp(edi, register_location(reg)); |
| 1037 | BranchOrBacktrack(equal, if_eq); |
| 1038 | } |
| 1039 | |
| 1040 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1041 | RegExpMacroAssembler::IrregexpImplementation |
| 1042 | RegExpMacroAssemblerIA32::Implementation() { |
| 1043 | return kIA32Implementation; |
| 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | void RegExpMacroAssemblerIA32::LoadCurrentCharacter(int cp_offset, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1048 | Label* on_end_of_input, |
| 1049 | bool check_bounds, |
| 1050 | int characters) { |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 1051 | ASSERT(cp_offset >= -1); // ^ and \b can look behind one character. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1052 | ASSERT(cp_offset < (1<<30)); // Be sane! (And ensure negation works) |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1053 | if (check_bounds) { |
| 1054 | CheckPosition(cp_offset + characters - 1, on_end_of_input); |
| 1055 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1056 | LoadCurrentCharacterUnchecked(cp_offset, characters); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | |
| 1060 | void RegExpMacroAssemblerIA32::PopCurrentPosition() { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1061 | Pop(edi); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | |
| 1065 | void RegExpMacroAssemblerIA32::PopRegister(int register_index) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1066 | Pop(eax); |
| 1067 | __ mov(register_location(register_index), eax); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1068 | } |
| 1069 | |
| 1070 | |
| 1071 | void RegExpMacroAssemblerIA32::PushBacktrack(Label* label) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1072 | Push(Immediate::CodeRelativeOffset(label)); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1073 | CheckStackLimit(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1074 | } |
| 1075 | |
| 1076 | |
| 1077 | void RegExpMacroAssemblerIA32::PushCurrentPosition() { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1078 | Push(edi); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1079 | } |
| 1080 | |
| 1081 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1082 | void RegExpMacroAssemblerIA32::PushRegister(int register_index, |
| 1083 | StackCheckFlag check_stack_limit) { |
| 1084 | __ mov(eax, register_location(register_index)); |
| 1085 | Push(eax); |
| 1086 | if (check_stack_limit) CheckStackLimit(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
| 1089 | |
| 1090 | void RegExpMacroAssemblerIA32::ReadCurrentPositionFromRegister(int reg) { |
| 1091 | __ mov(edi, register_location(reg)); |
| 1092 | } |
| 1093 | |
| 1094 | |
| 1095 | void RegExpMacroAssemblerIA32::ReadStackPointerFromRegister(int reg) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1096 | __ mov(backtrack_stackpointer(), register_location(reg)); |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 1097 | __ add(backtrack_stackpointer(), Operand(ebp, kStackHighEnd)); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1098 | } |
| 1099 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1100 | void RegExpMacroAssemblerIA32::SetCurrentPositionFromEnd(int by) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1101 | Label after_position; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1102 | __ cmp(edi, -by * char_size()); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1103 | __ j(greater_equal, &after_position, Label::kNear); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1104 | __ mov(edi, -by * char_size()); |
| 1105 | // On RegExp code entry (where this operation is used), the character before |
| 1106 | // the current position is expected to be already loaded. |
| 1107 | // We have advanced the position, so it's safe to read backwards. |
| 1108 | LoadCurrentCharacterUnchecked(-1, 1); |
| 1109 | __ bind(&after_position); |
| 1110 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1111 | |
| 1112 | void RegExpMacroAssemblerIA32::SetRegister(int register_index, int to) { |
| 1113 | ASSERT(register_index >= num_saved_registers_); // Reserved for positions! |
| 1114 | __ mov(register_location(register_index), Immediate(to)); |
| 1115 | } |
| 1116 | |
| 1117 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 1118 | bool RegExpMacroAssemblerIA32::Succeed() { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1119 | __ jmp(&success_label_); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 1120 | return global(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 1124 | void RegExpMacroAssemblerIA32::WriteCurrentPositionToRegister(int reg, |
| 1125 | int cp_offset) { |
| 1126 | if (cp_offset == 0) { |
| 1127 | __ mov(register_location(reg), edi); |
| 1128 | } else { |
| 1129 | __ lea(eax, Operand(edi, cp_offset * char_size())); |
| 1130 | __ mov(register_location(reg), eax); |
| 1131 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1132 | } |
| 1133 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 1134 | |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 1135 | void RegExpMacroAssemblerIA32::ClearRegisters(int reg_from, int reg_to) { |
| 1136 | ASSERT(reg_from <= reg_to); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1137 | __ mov(eax, Operand(ebp, kInputStartMinusOne)); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 1138 | for (int reg = reg_from; reg <= reg_to; reg++) { |
| 1139 | __ mov(register_location(reg), eax); |
| 1140 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1144 | void RegExpMacroAssemblerIA32::WriteStackPointerToRegister(int reg) { |
ager@chromium.org | 6f10e41 | 2009-02-13 10:11:16 +0000 | [diff] [blame] | 1145 | __ mov(eax, backtrack_stackpointer()); |
| 1146 | __ sub(eax, Operand(ebp, kStackHighEnd)); |
| 1147 | __ mov(register_location(reg), eax); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1151 | // Private methods: |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 1152 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1153 | void RegExpMacroAssemblerIA32::CallCheckStackGuardState(Register scratch) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1154 | static const int num_arguments = 3; |
| 1155 | __ PrepareCallCFunction(num_arguments, scratch); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1156 | // RegExp code frame pointer. |
| 1157 | __ mov(Operand(esp, 2 * kPointerSize), ebp); |
| 1158 | // Code* of self. |
| 1159 | __ mov(Operand(esp, 1 * kPointerSize), Immediate(masm_->CodeObject())); |
| 1160 | // Next address on the stack (will be address of return address). |
| 1161 | __ lea(eax, Operand(esp, -kPointerSize)); |
| 1162 | __ mov(Operand(esp, 0 * kPointerSize), eax); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1163 | ExternalReference check_stack_guard = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1164 | ExternalReference::re_check_stack_guard_state(isolate()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1165 | __ CallCFunction(check_stack_guard, num_arguments); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | |
| 1169 | // Helper function for reading a value out of a stack frame. |
| 1170 | template <typename T> |
| 1171 | static T& frame_entry(Address re_frame, int frame_offset) { |
| 1172 | return reinterpret_cast<T&>(Memory::int32_at(re_frame + frame_offset)); |
| 1173 | } |
| 1174 | |
| 1175 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1176 | int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address, |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1177 | Code* re_code, |
| 1178 | Address re_frame) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1179 | Isolate* isolate = frame_entry<Isolate*>(re_frame, kIsolate); |
| 1180 | ASSERT(isolate == Isolate::Current()); |
| 1181 | if (isolate->stack_guard()->IsStackOverflow()) { |
| 1182 | isolate->StackOverflow(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1183 | return EXCEPTION; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1184 | } |
| 1185 | |
| 1186 | // If not real stack overflow the stack guard was used to interrupt |
| 1187 | // execution for another purpose. |
| 1188 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1189 | // If this is a direct call from JavaScript retry the RegExp forcing the call |
| 1190 | // through the runtime system. Currently the direct call cannot handle a GC. |
| 1191 | if (frame_entry<int>(re_frame, kDirectCall) == 1) { |
| 1192 | return RETRY; |
| 1193 | } |
| 1194 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1195 | // Prepare for possible GC. |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1196 | HandleScope handles(isolate); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1197 | Handle<Code> code_handle(re_code); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1198 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1199 | Handle<String> subject(frame_entry<String*>(re_frame, kInputString)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1200 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1201 | // Current string. |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 1202 | bool is_ascii = subject->IsOneByteRepresentationUnderneath(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1203 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1204 | ASSERT(re_code->instruction_start() <= *return_address); |
| 1205 | ASSERT(*return_address <= |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1206 | re_code->instruction_start() + re_code->instruction_size()); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1207 | |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 1208 | MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1209 | |
| 1210 | if (*code_handle != re_code) { // Return address no longer valid |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1211 | int delta = code_handle->address() - re_code->address(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1212 | // Overwrite the return address on the stack. |
| 1213 | *return_address += delta; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1214 | } |
| 1215 | |
| 1216 | if (result->IsException()) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1217 | return EXCEPTION; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1218 | } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1219 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1220 | Handle<String> subject_tmp = subject; |
| 1221 | int slice_offset = 0; |
| 1222 | |
| 1223 | // Extract the underlying string and the slice offset. |
| 1224 | if (StringShape(*subject_tmp).IsCons()) { |
| 1225 | subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first()); |
| 1226 | } else if (StringShape(*subject_tmp).IsSliced()) { |
| 1227 | SlicedString* slice = SlicedString::cast(*subject_tmp); |
| 1228 | subject_tmp = Handle<String>(slice->parent()); |
| 1229 | slice_offset = slice->offset(); |
| 1230 | } |
| 1231 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1232 | // String might have changed. |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 1233 | if (subject_tmp->IsOneByteRepresentation() != is_ascii) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1234 | // If we changed between an ASCII and an UC16 string, the specialized |
| 1235 | // code cannot be used, and we need to restart regexp matching from |
| 1236 | // scratch (including, potentially, compiling a new version of the code). |
| 1237 | return RETRY; |
| 1238 | } |
| 1239 | |
| 1240 | // Otherwise, the content of the string might have moved. It must still |
| 1241 | // be a sequential or external string with the same content. |
| 1242 | // Update the start and end pointers in the stack frame to the current |
| 1243 | // location (whether it has actually moved or not). |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1244 | ASSERT(StringShape(*subject_tmp).IsSequential() || |
| 1245 | StringShape(*subject_tmp).IsExternal()); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1246 | |
| 1247 | // The original start address of the characters to match. |
| 1248 | const byte* start_address = frame_entry<const byte*>(re_frame, kInputStart); |
| 1249 | |
| 1250 | // Find the current start address of the same character at the current string |
| 1251 | // position. |
| 1252 | int start_index = frame_entry<int>(re_frame, kStartIndex); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1253 | const byte* new_address = StringCharacterPosition(*subject_tmp, |
| 1254 | start_index + slice_offset); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1255 | |
| 1256 | if (start_address != new_address) { |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1257 | // If there is a difference, update the object pointer and start and end |
| 1258 | // addresses in the RegExp stack frame to match the new value. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1259 | const byte* end_address = frame_entry<const byte* >(re_frame, kInputEnd); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1260 | int byte_length = static_cast<int>(end_address - start_address); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1261 | frame_entry<const String*>(re_frame, kInputString) = *subject; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1262 | frame_entry<const byte*>(re_frame, kInputStart) = new_address; |
| 1263 | frame_entry<const byte*>(re_frame, kInputEnd) = new_address + byte_length; |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 1264 | } else if (frame_entry<const String*>(re_frame, kInputString) != *subject) { |
| 1265 | // Subject string might have been a ConsString that underwent |
| 1266 | // short-circuiting during GC. That will not change start_address but |
| 1267 | // will change pointer inside the subject handle. |
| 1268 | frame_entry<const String*>(re_frame, kInputString) = *subject; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1269 | } |
| 1270 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1271 | return 0; |
| 1272 | } |
| 1273 | |
| 1274 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1275 | Operand RegExpMacroAssemblerIA32::register_location(int register_index) { |
| 1276 | ASSERT(register_index < (1<<30)); |
| 1277 | if (num_registers_ <= register_index) { |
| 1278 | num_registers_ = register_index + 1; |
| 1279 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1280 | return Operand(ebp, kRegisterZero - register_index * kPointerSize); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1284 | void RegExpMacroAssemblerIA32::CheckPosition(int cp_offset, |
| 1285 | Label* on_outside_input) { |
| 1286 | __ cmp(edi, -cp_offset * char_size()); |
| 1287 | BranchOrBacktrack(greater_equal, on_outside_input); |
| 1288 | } |
| 1289 | |
| 1290 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1291 | void RegExpMacroAssemblerIA32::BranchOrBacktrack(Condition condition, |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1292 | Label* to) { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1293 | if (condition < 0) { // No condition |
| 1294 | if (to == NULL) { |
| 1295 | Backtrack(); |
| 1296 | return; |
| 1297 | } |
| 1298 | __ jmp(to); |
| 1299 | return; |
| 1300 | } |
| 1301 | if (to == NULL) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1302 | __ j(condition, &backtrack_label_); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1303 | return; |
| 1304 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1305 | __ j(condition, to); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1306 | } |
| 1307 | |
| 1308 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1309 | void RegExpMacroAssemblerIA32::SafeCall(Label* to) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1310 | Label return_to; |
| 1311 | __ push(Immediate::CodeRelativeOffset(&return_to)); |
| 1312 | __ jmp(to); |
| 1313 | __ bind(&return_to); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | |
| 1317 | void RegExpMacroAssemblerIA32::SafeReturn() { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1318 | __ pop(ebx); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1319 | __ add(ebx, Immediate(masm_->CodeObject())); |
| 1320 | __ jmp(ebx); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 1321 | } |
| 1322 | |
| 1323 | |
| 1324 | void RegExpMacroAssemblerIA32::SafeCallTarget(Label* name) { |
| 1325 | __ bind(name); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1326 | } |
| 1327 | |
| 1328 | |
| 1329 | void RegExpMacroAssemblerIA32::Push(Register source) { |
| 1330 | ASSERT(!source.is(backtrack_stackpointer())); |
| 1331 | // Notice: This updates flags, unlike normal Push. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1332 | __ sub(backtrack_stackpointer(), Immediate(kPointerSize)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1333 | __ mov(Operand(backtrack_stackpointer(), 0), source); |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | void RegExpMacroAssemblerIA32::Push(Immediate value) { |
| 1338 | // Notice: This updates flags, unlike normal Push. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1339 | __ sub(backtrack_stackpointer(), Immediate(kPointerSize)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1340 | __ mov(Operand(backtrack_stackpointer(), 0), value); |
| 1341 | } |
| 1342 | |
| 1343 | |
| 1344 | void RegExpMacroAssemblerIA32::Pop(Register target) { |
| 1345 | ASSERT(!target.is(backtrack_stackpointer())); |
| 1346 | __ mov(target, Operand(backtrack_stackpointer(), 0)); |
| 1347 | // Notice: This updates flags, unlike normal Pop. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1348 | __ add(backtrack_stackpointer(), Immediate(kPointerSize)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1349 | } |
| 1350 | |
| 1351 | |
| 1352 | void RegExpMacroAssemblerIA32::CheckPreemption() { |
| 1353 | // Check for preemption. |
| 1354 | Label no_preempt; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1355 | ExternalReference stack_limit = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1356 | ExternalReference::address_of_stack_limit(isolate()); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1357 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1358 | __ j(above, &no_preempt); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1359 | |
| 1360 | SafeCall(&check_preempt_label_); |
| 1361 | |
| 1362 | __ bind(&no_preempt); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1363 | } |
| 1364 | |
| 1365 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1366 | void RegExpMacroAssemblerIA32::CheckStackLimit() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1367 | Label no_stack_overflow; |
| 1368 | ExternalReference stack_limit = |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1369 | ExternalReference::address_of_regexp_stack_limit(isolate()); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1370 | __ cmp(backtrack_stackpointer(), Operand::StaticVariable(stack_limit)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1371 | __ j(above, &no_stack_overflow); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1372 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1373 | SafeCall(&stack_overflow_label_); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1374 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1375 | __ bind(&no_stack_overflow); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1379 | void RegExpMacroAssemblerIA32::LoadCurrentCharacterUnchecked(int cp_offset, |
| 1380 | int characters) { |
| 1381 | if (mode_ == ASCII) { |
| 1382 | if (characters == 4) { |
| 1383 | __ mov(current_character(), Operand(esi, edi, times_1, cp_offset)); |
| 1384 | } else if (characters == 2) { |
| 1385 | __ movzx_w(current_character(), Operand(esi, edi, times_1, cp_offset)); |
| 1386 | } else { |
| 1387 | ASSERT(characters == 1); |
| 1388 | __ movzx_b(current_character(), Operand(esi, edi, times_1, cp_offset)); |
| 1389 | } |
| 1390 | } else { |
| 1391 | ASSERT(mode_ == UC16); |
| 1392 | if (characters == 2) { |
| 1393 | __ mov(current_character(), |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1394 | Operand(esi, edi, times_1, cp_offset * sizeof(uc16))); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1395 | } else { |
| 1396 | ASSERT(characters == 1); |
| 1397 | __ movzx_w(current_character(), |
| 1398 | Operand(esi, edi, times_1, cp_offset * sizeof(uc16))); |
| 1399 | } |
| 1400 | } |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1401 | } |
| 1402 | |
| 1403 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1404 | #undef __ |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1405 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 1406 | #endif // V8_INTERPRETED_REGEXP |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1407 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 1408 | }} // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1409 | |
| 1410 | #endif // V8_TARGET_ARCH_IA32 |