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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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56 * RegExp registers. | 56 * RegExp registers. |
57 * - rsp : points to tip of C stack. | 57 * - rsp : points to tip of C stack. |
58 * - rcx : points to tip of backtrack stack. The backtrack stack contains | 58 * - rcx : points to tip of backtrack stack. The backtrack stack contains |
59 * only 32-bit values. Most are offsets from some base (e.g., character | 59 * only 32-bit values. Most are offsets from some base (e.g., character |
60 * positions from end of string or code location from Code* pointer). | 60 * positions from end of string or code location from Code* pointer). |
61 * - r8 : code object pointer. Used to convert between absolute and | 61 * - r8 : code object pointer. Used to convert between absolute and |
62 * code-object-relative addresses. | 62 * code-object-relative addresses. |
63 * | 63 * |
64 * The registers rax, rbx, r9 and r11 are free to use for computations. | 64 * The registers rax, rbx, r9 and r11 are free to use for computations. |
65 * If changed to use r12+, they should be saved as callee-save registers. | 65 * If changed to use r12+, they should be saved as callee-save registers. |
| 66 * The macro assembler special registers r12 and r13 (kSmiConstantRegister, |
| 67 * kRootRegister) aren't special during execution of RegExp code (they don't |
| 68 * hold the values assumed when creating JS code), so no Smi or Root related |
| 69 * macro operations can be used. |
66 * | 70 * |
67 * Each call to a C++ method should retain these registers. | 71 * Each call to a C++ method should retain these registers. |
68 * | 72 * |
69 * The stack will have the following content, in some order, indexable from the | 73 * The stack will have the following content, in some order, indexable from the |
70 * frame pointer (see, e.g., kStackHighEnd): | 74 * frame pointer (see, e.g., kStackHighEnd): |
71 * - Isolate* isolate (Address of the current isolate) | 75 * - Isolate* isolate (Address of the current isolate) |
72 * - direct_call (if 1, direct call from JavaScript code, if 0 call | 76 * - direct_call (if 1, direct call from JavaScript code, if 0 call |
73 * through the runtime system) | 77 * through the runtime system) |
74 * - stack_area_base (High end of the memory area to use as | 78 * - stack_area_base (High end of the memory area to use as |
75 * backtracking stack) | 79 * backtracking stack) |
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104 * byte* stack_area_base, | 108 * byte* stack_area_base, |
105 * bool direct_call) | 109 * bool direct_call) |
106 */ | 110 */ |
107 | 111 |
108 #define __ ACCESS_MASM(masm_) | 112 #define __ ACCESS_MASM(masm_) |
109 | 113 |
110 RegExpMacroAssemblerX64::RegExpMacroAssemblerX64( | 114 RegExpMacroAssemblerX64::RegExpMacroAssemblerX64( |
111 Mode mode, | 115 Mode mode, |
112 int registers_to_save) | 116 int registers_to_save) |
113 : masm_(new MacroAssembler(NULL, kRegExpCodeSize)), | 117 : masm_(new MacroAssembler(NULL, kRegExpCodeSize)), |
| 118 no_root_array_scope_(masm_), |
114 code_relative_fixup_positions_(4), | 119 code_relative_fixup_positions_(4), |
115 mode_(mode), | 120 mode_(mode), |
116 num_registers_(registers_to_save), | 121 num_registers_(registers_to_save), |
117 num_saved_registers_(registers_to_save), | 122 num_saved_registers_(registers_to_save), |
118 entry_label_(), | 123 entry_label_(), |
119 start_label_(), | 124 start_label_(), |
120 success_label_(), | 125 success_label_(), |
121 backtrack_label_(), | 126 backtrack_label_(), |
122 exit_label_() { | 127 exit_label_() { |
123 ASSERT_EQ(0, registers_to_save % 2); | 128 ASSERT_EQ(0, registers_to_save % 2); |
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1378 } | 1383 } |
1379 } | 1384 } |
1380 | 1385 |
1381 #undef __ | 1386 #undef __ |
1382 | 1387 |
1383 #endif // V8_INTERPRETED_REGEXP | 1388 #endif // V8_INTERPRETED_REGEXP |
1384 | 1389 |
1385 }} // namespace v8::internal | 1390 }} // namespace v8::internal |
1386 | 1391 |
1387 #endif // V8_TARGET_ARCH_X64 | 1392 #endif // V8_TARGET_ARCH_X64 |
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