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| 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 // All Rights Reserved. | 2 // All Rights Reserved. |
| 3 // | 3 // |
| 4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
| 5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
| 6 // met: | 6 // met: |
| 7 // | 7 // |
| 8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
| 9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
| 10 // | 10 // |
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| 228 } | 228 } |
| 229 #endif | 229 #endif |
| 230 | 230 |
| 231 | 231 |
| 232 bool CpuFeatures::initialized_ = false; | 232 bool CpuFeatures::initialized_ = false; |
| 233 unsigned CpuFeatures::supported_ = 0; | 233 unsigned CpuFeatures::supported_ = 0; |
| 234 unsigned CpuFeatures::icache_line_size_ = 0; | 234 unsigned CpuFeatures::icache_line_size_ = 0; |
| 235 unsigned CpuFeatures::dcache_line_size_ = 0; | 235 unsigned CpuFeatures::dcache_line_size_ = 0; |
| 236 | 236 |
| 237 // ----------------------------------------------------------------------------- | 237 // ----------------------------------------------------------------------------- |
| 238 // Implementation of Label | |
| 239 | |
| 240 int Label::pos() const { | |
| 241 if (pos_ < 0) return -pos_ - 1; | |
| 242 if (pos_ > 0) return pos_ - 1; | |
| 243 UNREACHABLE(); | |
| 244 return 0; | |
| 245 } | |
| 246 | |
| 247 | |
| 248 // ----------------------------------------------------------------------------- | |
| 249 // Implementation of RelocInfoWriter and RelocIterator | 238 // Implementation of RelocInfoWriter and RelocIterator |
| 250 // | 239 // |
| 251 // Relocation information is written backwards in memory, from high addresses | 240 // Relocation information is written backwards in memory, from high addresses |
| 252 // towards low addresses, byte by byte. Therefore, in the encodings listed | 241 // towards low addresses, byte by byte. Therefore, in the encodings listed |
| 253 // below, the first byte listed it at the highest address, and successive | 242 // below, the first byte listed it at the highest address, and successive |
| 254 // bytes in the record are at progressively lower addresses. | 243 // bytes in the record are at progressively lower addresses. |
| 255 // | 244 // |
| 256 // Encoding | 245 // Encoding |
| 257 // | 246 // |
| 258 // The most common modes are given single-byte encodings. Also, it is | 247 // The most common modes are given single-byte encodings. Also, it is |
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| 1936 | 1925 |
| 1937 | 1926 |
| 1938 void Assembler::DataAlign(int m) { | 1927 void Assembler::DataAlign(int m) { |
| 1939 DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m)); | 1928 DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m)); |
| 1940 while ((pc_offset() & (m - 1)) != 0) { | 1929 while ((pc_offset() & (m - 1)) != 0) { |
| 1941 db(0); | 1930 db(0); |
| 1942 } | 1931 } |
| 1943 } | 1932 } |
| 1944 } // namespace internal | 1933 } // namespace internal |
| 1945 } // namespace v8 | 1934 } // namespace v8 |
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