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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium 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 "base/cpu.h" | 5 #include "base/cpu.h" |
6 | 6 |
7 #include <string.h> | 7 #include <string.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 | 10 |
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31 has_mmx_(false), | 31 has_mmx_(false), |
32 has_sse_(false), | 32 has_sse_(false), |
33 has_sse2_(false), | 33 has_sse2_(false), |
34 has_sse3_(false), | 34 has_sse3_(false), |
35 has_ssse3_(false), | 35 has_ssse3_(false), |
36 has_sse41_(false), | 36 has_sse41_(false), |
37 has_sse42_(false), | 37 has_sse42_(false), |
38 has_avx_(false), | 38 has_avx_(false), |
39 has_avx_hardware_(false), | 39 has_avx_hardware_(false), |
40 has_non_stop_time_stamp_counter_(false), | 40 has_non_stop_time_stamp_counter_(false), |
41 has_aesni_(false), | |
wtc
2013/11/27 18:01:51
Nit: move this member initializer up.
agl
2013/11/27 20:50:57
Done.
| |
41 cpu_vendor_("unknown") { | 42 cpu_vendor_("unknown") { |
42 Initialize(); | 43 Initialize(); |
43 } | 44 } |
44 | 45 |
45 namespace { | 46 namespace { |
46 | 47 |
47 #if defined(ARCH_CPU_X86_FAMILY) | 48 #if defined(ARCH_CPU_X86_FAMILY) |
48 #ifndef _MSC_VER | 49 #ifndef _MSC_VER |
49 | 50 |
50 #if defined(__pic__) && defined(__i386__) | 51 #if defined(__pic__) && defined(__i386__) |
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113 type_ = (cpu_info[0] >> 12) & 0x3; | 114 type_ = (cpu_info[0] >> 12) & 0x3; |
114 ext_model_ = (cpu_info[0] >> 16) & 0xf; | 115 ext_model_ = (cpu_info[0] >> 16) & 0xf; |
115 ext_family_ = (cpu_info[0] >> 20) & 0xff; | 116 ext_family_ = (cpu_info[0] >> 20) & 0xff; |
116 has_mmx_ = (cpu_info[3] & 0x00800000) != 0; | 117 has_mmx_ = (cpu_info[3] & 0x00800000) != 0; |
117 has_sse_ = (cpu_info[3] & 0x02000000) != 0; | 118 has_sse_ = (cpu_info[3] & 0x02000000) != 0; |
118 has_sse2_ = (cpu_info[3] & 0x04000000) != 0; | 119 has_sse2_ = (cpu_info[3] & 0x04000000) != 0; |
119 has_sse3_ = (cpu_info[2] & 0x00000001) != 0; | 120 has_sse3_ = (cpu_info[2] & 0x00000001) != 0; |
120 has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; | 121 has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; |
121 has_sse41_ = (cpu_info[2] & 0x00080000) != 0; | 122 has_sse41_ = (cpu_info[2] & 0x00080000) != 0; |
122 has_sse42_ = (cpu_info[2] & 0x00100000) != 0; | 123 has_sse42_ = (cpu_info[2] & 0x00100000) != 0; |
124 has_aesni_ = (cpu_info[2] & 0x02000000) != 0; | |
wtc
2013/11/27 18:01:51
Nit: this should ideally be set after the has_avx_
agl
2013/11/27 20:50:57
Done.
| |
123 has_avx_hardware_ = | 125 has_avx_hardware_ = |
124 (cpu_info[2] & 0x10000000) != 0; | 126 (cpu_info[2] & 0x10000000) != 0; |
125 // AVX instructions will generate an illegal instruction exception unless | 127 // AVX instructions will generate an illegal instruction exception unless |
126 // a) they are supported by the CPU, | 128 // a) they are supported by the CPU, |
127 // b) XSAVE is supported by the CPU and | 129 // b) XSAVE is supported by the CPU and |
128 // c) XSAVE is enabled by the kernel. | 130 // c) XSAVE is enabled by the kernel. |
129 // See http://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled | 131 // See http://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled |
130 has_avx_ = | 132 has_avx_ = |
131 has_avx_hardware_ && | 133 has_avx_hardware_ && |
132 (cpu_info[2] & 0x08000000) != 0 /* OSXSAVE */ && | 134 (cpu_info[2] & 0x08000000) != 0 /* OSXSAVE */ && |
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170 if (has_sse42()) return SSE42; | 172 if (has_sse42()) return SSE42; |
171 if (has_sse41()) return SSE41; | 173 if (has_sse41()) return SSE41; |
172 if (has_ssse3()) return SSSE3; | 174 if (has_ssse3()) return SSSE3; |
173 if (has_sse3()) return SSE3; | 175 if (has_sse3()) return SSE3; |
174 if (has_sse2()) return SSE2; | 176 if (has_sse2()) return SSE2; |
175 if (has_sse()) return SSE; | 177 if (has_sse()) return SSE; |
176 return PENTIUM; | 178 return PENTIUM; |
177 } | 179 } |
178 | 180 |
179 } // namespace base | 181 } // namespace base |
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