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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_LINUX | 10 #if V8_OS_LINUX |
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284 } | 284 } |
285 return false; | 285 return false; |
286 } | 286 } |
287 | 287 |
288 #endif // V8_HOST_ARCH_ARM || V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64 | 288 #endif // V8_HOST_ARCH_ARM || V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64 |
289 | 289 |
290 #endif // V8_OS_LINUX | 290 #endif // V8_OS_LINUX |
291 | 291 |
292 #endif // V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64 | 292 #endif // V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64 |
293 | 293 |
294 CPU::CPU() : stepping_(0), | 294 CPU::CPU() |
295 model_(0), | 295 : stepping_(0), |
296 ext_model_(0), | 296 model_(0), |
297 family_(0), | 297 ext_model_(0), |
298 ext_family_(0), | 298 family_(0), |
299 type_(0), | 299 ext_family_(0), |
300 implementer_(0), | 300 type_(0), |
301 architecture_(0), | 301 implementer_(0), |
302 part_(0), | 302 architecture_(0), |
303 has_fpu_(false), | 303 part_(0), |
304 has_cmov_(false), | 304 has_fpu_(false), |
305 has_sahf_(false), | 305 has_cmov_(false), |
306 has_mmx_(false), | 306 has_sahf_(false), |
307 has_sse_(false), | 307 has_mmx_(false), |
308 has_sse2_(false), | 308 has_sse_(false), |
309 has_sse3_(false), | 309 has_sse2_(false), |
310 has_ssse3_(false), | 310 has_sse3_(false), |
311 has_sse41_(false), | 311 has_ssse3_(false), |
312 has_sse42_(false), | 312 has_sse41_(false), |
313 has_idiva_(false), | 313 has_sse42_(false), |
314 has_neon_(false), | 314 has_avx_(false), |
315 has_thumb2_(false), | 315 has_fma3_(false), |
316 has_vfp_(false), | 316 has_idiva_(false), |
317 has_vfp3_(false), | 317 has_neon_(false), |
318 has_vfp3_d32_(false), | 318 has_thumb2_(false), |
319 is_fp64_mode_(false) { | 319 has_vfp_(false), |
| 320 has_vfp3_(false), |
| 321 has_vfp3_d32_(false), |
| 322 is_fp64_mode_(false) { |
320 memcpy(vendor_, "Unknown", 8); | 323 memcpy(vendor_, "Unknown", 8); |
321 #if V8_OS_NACL | 324 #if V8_OS_NACL |
322 // Portable host shouldn't do feature detection. | 325 // Portable host shouldn't do feature detection. |
323 // TODO(jfb): Remove the hardcoded ARM simulator flags in the build, and | 326 // TODO(jfb): Remove the hardcoded ARM simulator flags in the build, and |
324 // hardcode them here instead. | 327 // hardcode them here instead. |
325 #elif V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64 | 328 #elif V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64 |
326 int cpu_info[4]; | 329 int cpu_info[4]; |
327 | 330 |
328 // __cpuid with an InfoType argument of 0 returns the number of | 331 // __cpuid with an InfoType argument of 0 returns the number of |
329 // valid Ids in CPUInfo[0] and the CPU identification string in | 332 // valid Ids in CPUInfo[0] and the CPU identification string in |
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349 ext_family_ = (cpu_info[0] >> 20) & 0xff; | 352 ext_family_ = (cpu_info[0] >> 20) & 0xff; |
350 has_fpu_ = (cpu_info[3] & 0x00000001) != 0; | 353 has_fpu_ = (cpu_info[3] & 0x00000001) != 0; |
351 has_cmov_ = (cpu_info[3] & 0x00008000) != 0; | 354 has_cmov_ = (cpu_info[3] & 0x00008000) != 0; |
352 has_mmx_ = (cpu_info[3] & 0x00800000) != 0; | 355 has_mmx_ = (cpu_info[3] & 0x00800000) != 0; |
353 has_sse_ = (cpu_info[3] & 0x02000000) != 0; | 356 has_sse_ = (cpu_info[3] & 0x02000000) != 0; |
354 has_sse2_ = (cpu_info[3] & 0x04000000) != 0; | 357 has_sse2_ = (cpu_info[3] & 0x04000000) != 0; |
355 has_sse3_ = (cpu_info[2] & 0x00000001) != 0; | 358 has_sse3_ = (cpu_info[2] & 0x00000001) != 0; |
356 has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; | 359 has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; |
357 has_sse41_ = (cpu_info[2] & 0x00080000) != 0; | 360 has_sse41_ = (cpu_info[2] & 0x00080000) != 0; |
358 has_sse42_ = (cpu_info[2] & 0x00100000) != 0; | 361 has_sse42_ = (cpu_info[2] & 0x00100000) != 0; |
| 362 has_avx_ = (cpu_info[2] & 0x18000000) != 0; |
| 363 if (has_avx_) has_fma3_ = (cpu_info[2] & 0x00001000) != 0; |
359 } | 364 } |
360 | 365 |
361 #if V8_HOST_ARCH_IA32 | 366 #if V8_HOST_ARCH_IA32 |
362 // SAHF is always available in compat/legacy mode, | 367 // SAHF is always available in compat/legacy mode, |
363 has_sahf_ = true; | 368 has_sahf_ = true; |
364 #else | 369 #else |
365 // Query extended IDs. | 370 // Query extended IDs. |
366 __cpuid(cpu_info, 0x80000000); | 371 __cpuid(cpu_info, 0x80000000); |
367 unsigned num_ext_ids = cpu_info[0]; | 372 unsigned num_ext_ids = cpu_info[0]; |
368 | 373 |
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551 if (end == part) { | 556 if (end == part) { |
552 part_ = 0; | 557 part_ = 0; |
553 } | 558 } |
554 delete[] part; | 559 delete[] part; |
555 } | 560 } |
556 | 561 |
557 #endif | 562 #endif |
558 } | 563 } |
559 | 564 |
560 } } // namespace v8::base | 565 } } // namespace v8::base |
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