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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/base/cpu.h" | 5 #include "src/base/cpu.h" |
6 | 6 |
7 #if V8_LIBC_MSVCRT | 7 #if V8_LIBC_MSVCRT |
8 #include <intrin.h> // __cpuid() | 8 #include <intrin.h> // __cpuid() |
9 #endif | 9 #endif |
10 #if V8_OS_POSIX | 10 #if V8_OS_POSIX |
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156 | 156 |
157 ~CPUInfo() { | 157 ~CPUInfo() { |
158 delete[] data_; | 158 delete[] data_; |
159 } | 159 } |
160 | 160 |
161 // Extract the content of a the first occurence of a given field in | 161 // Extract the content of a the first occurence of a given field in |
162 // the content of the cpuinfo file and return it as a heap-allocated | 162 // the content of the cpuinfo file and return it as a heap-allocated |
163 // string that must be freed by the caller using delete[]. | 163 // string that must be freed by the caller using delete[]. |
164 // Return NULL if not found. | 164 // Return NULL if not found. |
165 char* ExtractField(const char* field) const { | 165 char* ExtractField(const char* field) const { |
166 ASSERT(field != NULL); | 166 DCHECK(field != NULL); |
167 | 167 |
168 // Look for first field occurence, and ensure it starts the line. | 168 // Look for first field occurence, and ensure it starts the line. |
169 size_t fieldlen = strlen(field); | 169 size_t fieldlen = strlen(field); |
170 char* p = data_; | 170 char* p = data_; |
171 for (;;) { | 171 for (;;) { |
172 p = strstr(p, field); | 172 p = strstr(p, field); |
173 if (p == NULL) { | 173 if (p == NULL) { |
174 return NULL; | 174 return NULL; |
175 } | 175 } |
176 if (p == data_ || p[-1] == '\n') { | 176 if (p == data_ || p[-1] == '\n') { |
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434 | 434 |
435 uint32_t cpu_flags = SYSPAGE_ENTRY(cpuinfo)->flags; | 435 uint32_t cpu_flags = SYSPAGE_ENTRY(cpuinfo)->flags; |
436 if (cpu_flags & ARM_CPU_FLAG_V7) { | 436 if (cpu_flags & ARM_CPU_FLAG_V7) { |
437 architecture_ = 7; | 437 architecture_ = 7; |
438 has_thumb2_ = true; | 438 has_thumb2_ = true; |
439 } else if (cpu_flags & ARM_CPU_FLAG_V6) { | 439 } else if (cpu_flags & ARM_CPU_FLAG_V6) { |
440 architecture_ = 6; | 440 architecture_ = 6; |
441 // QNX doesn't say if Thumb2 is available. | 441 // QNX doesn't say if Thumb2 is available. |
442 // Assume false for the architectures older than ARMv7. | 442 // Assume false for the architectures older than ARMv7. |
443 } | 443 } |
444 ASSERT(architecture_ >= 6); | 444 DCHECK(architecture_ >= 6); |
445 has_fpu_ = (cpu_flags & CPU_FLAG_FPU) != 0; | 445 has_fpu_ = (cpu_flags & CPU_FLAG_FPU) != 0; |
446 has_vfp_ = has_fpu_; | 446 has_vfp_ = has_fpu_; |
447 if (cpu_flags & ARM_CPU_FLAG_NEON) { | 447 if (cpu_flags & ARM_CPU_FLAG_NEON) { |
448 has_neon_ = true; | 448 has_neon_ = true; |
449 has_vfp3_ = has_vfp_; | 449 has_vfp3_ = has_vfp_; |
450 #ifdef ARM_CPU_FLAG_VFP_D32 | 450 #ifdef ARM_CPU_FLAG_VFP_D32 |
451 has_vfp3_d32_ = (cpu_flags & ARM_CPU_FLAG_VFP_D32) != 0; | 451 has_vfp3_d32_ = (cpu_flags & ARM_CPU_FLAG_VFP_D32) != 0; |
452 #endif | 452 #endif |
453 } | 453 } |
454 has_idiva_ = (cpu_flags & ARM_CPU_FLAG_IDIV) != 0; | 454 has_idiva_ = (cpu_flags & ARM_CPU_FLAG_IDIV) != 0; |
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490 if (end == part) { | 490 if (end == part) { |
491 part_ = 0; | 491 part_ = 0; |
492 } | 492 } |
493 delete[] part; | 493 delete[] part; |
494 } | 494 } |
495 | 495 |
496 #endif | 496 #endif |
497 } | 497 } |
498 | 498 |
499 } } // namespace v8::base | 499 } } // namespace v8::base |
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