clang  6.0.0svn
cpuid.h
Go to the documentation of this file.
1 /*===---- cpuid.h - X86 cpu model detection --------------------------------===
2  *
3  * Permission is hereby granted, free of charge, to any person obtaining a copy
4  * of this software and associated documentation files (the "Software"), to deal
5  * in the Software without restriction, including without limitation the rights
6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7  * copies of the Software, and to permit persons to whom the Software is
8  * furnished to do so, subject to the following conditions:
9  *
10  * The above copyright notice and this permission notice shall be included in
11  * all copies or substantial portions of the Software.
12  *
13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19  * THE SOFTWARE.
20  *
21  *===-----------------------------------------------------------------------===
22  */
23 
24 #if !(__x86_64__ || __i386__)
25 #error this header is for x86 only
26 #endif
27 
28 /* Responses identification request with %eax 0 */
29 /* AMD: "AuthenticAMD" */
30 #define signature_AMD_ebx 0x68747541
31 #define signature_AMD_edx 0x69746e65
32 #define signature_AMD_ecx 0x444d4163
33 /* CENTAUR: "CentaurHauls" */
34 #define signature_CENTAUR_ebx 0x746e6543
35 #define signature_CENTAUR_edx 0x48727561
36 #define signature_CENTAUR_ecx 0x736c7561
37 /* CYRIX: "CyrixInstead" */
38 #define signature_CYRIX_ebx 0x69727943
39 #define signature_CYRIX_edx 0x736e4978
40 #define signature_CYRIX_ecx 0x64616574
41 /* INTEL: "GenuineIntel" */
42 #define signature_INTEL_ebx 0x756e6547
43 #define signature_INTEL_edx 0x49656e69
44 #define signature_INTEL_ecx 0x6c65746e
45 /* TM1: "TransmetaCPU" */
46 #define signature_TM1_ebx 0x6e617254
47 #define signature_TM1_edx 0x74656d73
48 #define signature_TM1_ecx 0x55504361
49 /* TM2: "GenuineTMx86" */
50 #define signature_TM2_ebx 0x756e6547
51 #define signature_TM2_edx 0x54656e69
52 #define signature_TM2_ecx 0x3638784d
53 /* NSC: "Geode by NSC" */
54 #define signature_NSC_ebx 0x646f6547
55 #define signature_NSC_edx 0x43534e20
56 #define signature_NSC_ecx 0x79622065
57 /* NEXGEN: "NexGenDriven" */
58 #define signature_NEXGEN_ebx 0x4778654e
59 #define signature_NEXGEN_edx 0x72446e65
60 #define signature_NEXGEN_ecx 0x6e657669
61 /* RISE: "RiseRiseRise" */
62 #define signature_RISE_ebx 0x65736952
63 #define signature_RISE_edx 0x65736952
64 #define signature_RISE_ecx 0x65736952
65 /* SIS: "SiS SiS SiS " */
66 #define signature_SIS_ebx 0x20536953
67 #define signature_SIS_edx 0x20536953
68 #define signature_SIS_ecx 0x20536953
69 /* UMC: "UMC UMC UMC " */
70 #define signature_UMC_ebx 0x20434d55
71 #define signature_UMC_edx 0x20434d55
72 #define signature_UMC_ecx 0x20434d55
73 /* VIA: "VIA VIA VIA " */
74 #define signature_VIA_ebx 0x20414956
75 #define signature_VIA_edx 0x20414956
76 #define signature_VIA_ecx 0x20414956
77 /* VORTEX: "Vortex86 SoC" */
78 #define signature_VORTEX_ebx 0x74726f56
79 #define signature_VORTEX_edx 0x36387865
80 #define signature_VORTEX_ecx 0x436f5320
81 
82 /* Features in %ecx for leaf 1 */
83 #define bit_SSE3 0x00000001
84 #define bit_PCLMULQDQ 0x00000002
85 #define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */
86 #define bit_DTES64 0x00000004
87 #define bit_MONITOR 0x00000008
88 #define bit_DSCPL 0x00000010
89 #define bit_VMX 0x00000020
90 #define bit_SMX 0x00000040
91 #define bit_EIST 0x00000080
92 #define bit_TM2 0x00000100
93 #define bit_SSSE3 0x00000200
94 #define bit_CNXTID 0x00000400
95 #define bit_FMA 0x00001000
96 #define bit_CMPXCHG16B 0x00002000
97 #define bit_xTPR 0x00004000
98 #define bit_PDCM 0x00008000
99 #define bit_PCID 0x00020000
100 #define bit_DCA 0x00040000
101 #define bit_SSE41 0x00080000
102 #define bit_SSE4_1 bit_SSE41 /* for gcc compat */
103 #define bit_SSE42 0x00100000
104 #define bit_SSE4_2 bit_SSE42 /* for gcc compat */
105 #define bit_x2APIC 0x00200000
106 #define bit_MOVBE 0x00400000
107 #define bit_POPCNT 0x00800000
108 #define bit_TSCDeadline 0x01000000
109 #define bit_AESNI 0x02000000
110 #define bit_AES bit_AESNI /* for gcc compat */
111 #define bit_XSAVE 0x04000000
112 #define bit_OSXSAVE 0x08000000
113 #define bit_AVX 0x10000000
114 #define bit_F16C 0x20000000
115 #define bit_RDRND 0x40000000
116 
117 /* Features in %edx for leaf 1 */
118 #define bit_FPU 0x00000001
119 #define bit_VME 0x00000002
120 #define bit_DE 0x00000004
121 #define bit_PSE 0x00000008
122 #define bit_TSC 0x00000010
123 #define bit_MSR 0x00000020
124 #define bit_PAE 0x00000040
125 #define bit_MCE 0x00000080
126 #define bit_CX8 0x00000100
127 #define bit_CMPXCHG8B bit_CX8 /* for gcc compat */
128 #define bit_APIC 0x00000200
129 #define bit_SEP 0x00000800
130 #define bit_MTRR 0x00001000
131 #define bit_PGE 0x00002000
132 #define bit_MCA 0x00004000
133 #define bit_CMOV 0x00008000
134 #define bit_PAT 0x00010000
135 #define bit_PSE36 0x00020000
136 #define bit_PSN 0x00040000
137 #define bit_CLFSH 0x00080000
138 #define bit_DS 0x00200000
139 #define bit_ACPI 0x00400000
140 #define bit_MMX 0x00800000
141 #define bit_FXSR 0x01000000
142 #define bit_FXSAVE bit_FXSR /* for gcc compat */
143 #define bit_SSE 0x02000000
144 #define bit_SSE2 0x04000000
145 #define bit_SS 0x08000000
146 #define bit_HTT 0x10000000
147 #define bit_TM 0x20000000
148 #define bit_PBE 0x80000000
149 
150 /* Features in %ebx for leaf 7 sub-leaf 0 */
151 #define bit_FSGSBASE 0x00000001
152 #define bit_SGX 0x00000004
153 #define bit_BMI 0x00000008
154 #define bit_HLE 0x00000010
155 #define bit_AVX2 0x00000020
156 #define bit_SMEP 0x00000080
157 #define bit_BMI2 0x00000100
158 #define bit_ENH_MOVSB 0x00000200
159 #define bit_RTM 0x00000800
160 #define bit_MPX 0x00004000
161 #define bit_AVX512F 0x00010000
162 #define bit_AVX512DQ 0x00020000
163 #define bit_RDSEED 0x00040000
164 #define bit_ADX 0x00080000
165 #define bit_AVX512IFMA 0x00200000
166 #define bit_CLFLUSHOPT 0x00800000
167 #define bit_CLWB 0x01000000
168 #define bit_AVX512PF 0x04000000
169 #define bit_AVX51SER 0x08000000
170 #define bit_AVX512CD 0x10000000
171 #define bit_SHA 0x20000000
172 #define bit_AVX512BW 0x40000000
173 #define bit_AVX512VL 0x80000000
174 
175 /* Features in %ecx for leaf 7 sub-leaf 0 */
176 #define bit_PREFTCHWT1 0x00000001
177 #define bit_AVX512VBMI 0x00000002
178 #define bit_PKU 0x00000004
179 #define bit_OSPKE 0x00000010
180 #define bit_AVX512VPOPCNTDQ 0x00004000
181 #define bit_RDPID 0x00400000
182 
183 /* Features in %edx for leaf 7 sub-leaf 0 */
184 #define bit_AVX5124VNNIW 0x00000004
185 #define bit_AVX5124FMAPS 0x00000008
186 
187 /* Features in %eax for leaf 13 sub-leaf 1 */
188 #define bit_XSAVEOPT 0x00000001
189 #define bit_XSAVEC 0x00000002
190 #define bit_XSAVES 0x00000008
191 
192 /* Features in %ecx for leaf 0x80000001 */
193 #define bit_LAHF_LM 0x00000001
194 #define bit_ABM 0x00000020
195 #define bit_SSE4a 0x00000040
196 #define bit_PRFCHW 0x00000100
197 #define bit_XOP 0x00000800
198 #define bit_LWP 0x00008000
199 #define bit_FMA4 0x00010000
200 #define bit_TBM 0x00200000
201 #define bit_MWAITX 0x20000000
202 
203 /* Features in %edx for leaf 0x80000001 */
204 #define bit_MMXEXT 0x00400000
205 #define bit_LM 0x20000000
206 #define bit_3DNOWP 0x40000000
207 #define bit_3DNOW 0x80000000
208 
209 /* Features in %ebx for leaf 0x80000001 */
210 #define bit_CLZERO 0x00000001
211 
212 
213 #if __i386__
214 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
215  __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
216  : "0"(__leaf))
217 
218 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
219  __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
220  : "0"(__leaf), "2"(__count))
221 #else
222 /* x86-64 uses %rbx as the base register, so preserve it. */
223 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
224  __asm(" xchgq %%rbx,%q1\n" \
225  " cpuid\n" \
226  " xchgq %%rbx,%q1" \
227  : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
228  : "0"(__leaf))
229 
230 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
231  __asm(" xchgq %%rbx,%q1\n" \
232  " cpuid\n" \
233  " xchgq %%rbx,%q1" \
234  : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
235  : "0"(__leaf), "2"(__count))
236 #endif
237 
238 static __inline int __get_cpuid_max (unsigned int __leaf, unsigned int *__sig)
239 {
240  unsigned int __eax, __ebx, __ecx, __edx;
241 #if __i386__
242  int __cpuid_supported;
243 
244  __asm(" pushfl\n"
245  " popl %%eax\n"
246  " movl %%eax,%%ecx\n"
247  " xorl $0x00200000,%%eax\n"
248  " pushl %%eax\n"
249  " popfl\n"
250  " pushfl\n"
251  " popl %%eax\n"
252  " movl $0,%0\n"
253  " cmpl %%eax,%%ecx\n"
254  " je 1f\n"
255  " movl $1,%0\n"
256  "1:"
257  : "=r" (__cpuid_supported) : : "eax", "ecx");
258  if (!__cpuid_supported)
259  return 0;
260 #endif
261 
262  __cpuid(__leaf, __eax, __ebx, __ecx, __edx);
263  if (__sig)
264  *__sig = __ebx;
265  return __eax;
266 }
267 
268 static __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax,
269  unsigned int *__ebx, unsigned int *__ecx,
270  unsigned int *__edx)
271 {
272  unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
273 
274  if (__max_leaf == 0 || __max_leaf < __leaf)
275  return 0;
276 
277  __cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx);
278  return 1;
279 }
280 
281 static __inline int __get_cpuid_count (unsigned int __leaf,
282  unsigned int __subleaf,
283  unsigned int *__eax, unsigned int *__ebx,
284  unsigned int *__ecx, unsigned int *__edx)
285 {
286  unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
287 
288  if (__max_leaf == 0 || __max_leaf < __leaf)
289  return 0;
290 
291  __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
292  return 1;
293 }
#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx)
Definition: cpuid.h:223
#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx)
Definition: cpuid.h:230
static __inline int __get_cpuid_count(unsigned int __leaf, unsigned int __subleaf, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx)
Definition: cpuid.h:281
static __inline int __get_cpuid_max(unsigned int __leaf, unsigned int *__sig)
Definition: cpuid.h:238
static __inline int __get_cpuid(unsigned int __leaf, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx)
Definition: cpuid.h:268