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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 private: | 56 private: |
57 SaveFPRegsMode save_doubles_; | 57 SaveFPRegsMode save_doubles_; |
58 | 58 |
59 Major MajorKey() { return StoreBufferOverflow; } | 59 Major MajorKey() { return StoreBufferOverflow; } |
60 int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; } | 60 int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; } |
61 }; | 61 }; |
62 | 62 |
63 | 63 |
64 class StringHelper : public AllStatic { | 64 class StringHelper : public AllStatic { |
65 public: | 65 public: |
66 // Generate code for copying characters using a simple loop. This should only | |
67 // be used in places where the number of characters is small and the | |
68 // additional setup and checking in GenerateCopyCharactersREP adds too much | |
69 // overhead. Copying of overlapping regions is not supported. | |
70 static void GenerateCopyCharacters(MacroAssembler* masm, | |
71 Register dest, | |
72 Register src, | |
73 Register count, | |
74 Register scratch, | |
75 bool ascii); | |
76 | |
77 // Generate code for copying characters using the rep movs instruction. | 66 // Generate code for copying characters using the rep movs instruction. |
78 // Copies ecx characters from esi to edi. Copying of overlapping regions is | 67 // Copies ecx characters from esi to edi. Copying of overlapping regions is |
79 // not supported. | 68 // not supported. |
80 static void GenerateCopyCharactersREP(MacroAssembler* masm, | 69 static void GenerateCopyCharactersREP(MacroAssembler* masm, |
81 Register dest, // Must be edi. | 70 Register dest, // Must be edi. |
82 Register src, // Must be esi. | 71 Register src, // Must be esi. |
83 Register count, // Must be ecx. | 72 Register count, // Must be ecx. |
84 Register scratch, // Neither of above. | 73 Register scratch, // Neither of above. |
85 bool ascii); | 74 bool ascii); |
86 | 75 |
87 // Probe the string table for a two character string. If the string | |
88 // requires non-standard hashing a jump to the label not_probed is | |
89 // performed and registers c1 and c2 are preserved. In all other | |
90 // cases they are clobbered. If the string is not found by probing a | |
91 // jump to the label not_found is performed. This jump does not | |
92 // guarantee that the string is not in the string table. If the | |
93 // string is found the code falls through with the string in | |
94 // register eax. | |
95 static void GenerateTwoCharacterStringTableProbe(MacroAssembler* masm, | |
96 Register c1, | |
97 Register c2, | |
98 Register scratch1, | |
99 Register scratch2, | |
100 Register scratch3, | |
101 Label* not_probed, | |
102 Label* not_found); | |
103 | |
104 // Generate string hash. | 76 // Generate string hash. |
105 static void GenerateHashInit(MacroAssembler* masm, | 77 static void GenerateHashInit(MacroAssembler* masm, |
106 Register hash, | 78 Register hash, |
107 Register character, | 79 Register character, |
108 Register scratch); | 80 Register scratch); |
109 static void GenerateHashAddCharacter(MacroAssembler* masm, | 81 static void GenerateHashAddCharacter(MacroAssembler* masm, |
110 Register hash, | 82 Register hash, |
111 Register character, | 83 Register character, |
112 Register scratch); | 84 Register scratch); |
113 static void GenerateHashGetHash(MacroAssembler* masm, | 85 static void GenerateHashGetHash(MacroAssembler* masm, |
114 Register hash, | 86 Register hash, |
115 Register scratch); | 87 Register scratch); |
116 | 88 |
117 private: | 89 private: |
118 DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); | 90 DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
119 }; | 91 }; |
120 | 92 |
121 | 93 |
122 class StringAddStub: public PlatformCodeStub { | |
123 public: | |
124 explicit StringAddStub(StringAddFlags flags) : flags_(flags) {} | |
125 | |
126 private: | |
127 Major MajorKey() { return StringAdd; } | |
128 int MinorKey() { return flags_; } | |
129 | |
130 void Generate(MacroAssembler* masm); | |
131 | |
132 void GenerateConvertArgument(MacroAssembler* masm, | |
133 int stack_offset, | |
134 Register arg, | |
135 Register scratch1, | |
136 Register scratch2, | |
137 Register scratch3, | |
138 Label* slow); | |
139 | |
140 void GenerateRegisterArgsPush(MacroAssembler* masm); | |
141 void GenerateRegisterArgsPop(MacroAssembler* masm, Register temp); | |
142 | |
143 const StringAddFlags flags_; | |
144 }; | |
145 | |
146 | |
147 class SubStringStub: public PlatformCodeStub { | 94 class SubStringStub: public PlatformCodeStub { |
148 public: | 95 public: |
149 SubStringStub() {} | 96 SubStringStub() {} |
150 | 97 |
151 private: | 98 private: |
152 Major MajorKey() { return SubString; } | 99 Major MajorKey() { return SubString; } |
153 int MinorKey() { return 0; } | 100 int MinorKey() { return 0; } |
154 | 101 |
155 void Generate(MacroAssembler* masm); | 102 void Generate(MacroAssembler* masm); |
156 }; | 103 }; |
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508 Register address_; | 455 Register address_; |
509 RememberedSetAction remembered_set_action_; | 456 RememberedSetAction remembered_set_action_; |
510 SaveFPRegsMode save_fp_regs_mode_; | 457 SaveFPRegsMode save_fp_regs_mode_; |
511 RegisterAllocation regs_; | 458 RegisterAllocation regs_; |
512 }; | 459 }; |
513 | 460 |
514 | 461 |
515 } } // namespace v8::internal | 462 } } // namespace v8::internal |
516 | 463 |
517 #endif // V8_IA32_CODE_STUBS_IA32_H_ | 464 #endif // V8_IA32_CODE_STUBS_IA32_H_ |
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