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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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178 T* a = NULL; | 178 T* a = NULL; |
179 U* b = NULL; | 179 U* b = NULL; |
180 a = b; // Fake assignment to check assignability. | 180 a = b; // Fake assignment to check assignability. |
181 USE(a); | 181 USE(a); |
182 #endif // DEBUG | 182 #endif // DEBUG |
183 #if defined(V8_HOST_ARCH_IA32) | 183 #if defined(V8_HOST_ARCH_IA32) |
184 #define STOS "stosl" | 184 #define STOS "stosl" |
185 #elif defined(V8_HOST_ARCH_X64) | 185 #elif defined(V8_HOST_ARCH_X64) |
186 #define STOS "stosq" | 186 #define STOS "stosq" |
187 #endif | 187 #endif |
| 188 #if defined(__native_client__) |
| 189 // This STOS sequence does not validate for x86_64 Native Client. |
| 190 // Here we #undef STOS to force use of the slower C version. |
| 191 // TODO(bradchen): Profile V8 and implement a faster REP STOS |
| 192 // here if the profile indicates it matters. |
| 193 #undef STOS |
| 194 #endif |
188 | 195 |
189 #if defined(__GNUC__) && defined(STOS) | 196 #if defined(__GNUC__) && defined(STOS) |
190 asm volatile( | 197 asm volatile( |
191 "cld;" | 198 "cld;" |
192 "rep ; " STOS | 199 "rep ; " STOS |
193 : "+&c" (counter), "+&D" (dest) | 200 : "+&c" (counter), "+&D" (dest) |
194 : "a" (value) | 201 : "a" (value) |
195 : "memory", "cc"); | 202 : "memory", "cc"); |
196 #else | 203 #else |
197 for (int i = 0; i < counter; i++) { | 204 for (int i = 0; i < counter; i++) { |
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301 | 308 |
302 // Add formatted contents like printf based on a va_list. | 309 // Add formatted contents like printf based on a va_list. |
303 void AddFormattedList(const char* format, va_list list); | 310 void AddFormattedList(const char* format, va_list list); |
304 private: | 311 private: |
305 DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder); | 312 DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder); |
306 }; | 313 }; |
307 | 314 |
308 } } // namespace v8::internal | 315 } } // namespace v8::internal |
309 | 316 |
310 #endif // V8_V8UTILS_H_ | 317 #endif // V8_V8UTILS_H_ |
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