1 /*===---- cpuid.h - X86 cpu model detection --------------------------------===
2 *
3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 * See https://llvm.org/LICENSE.txt for license information.
5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 *
7 *===-----------------------------------------------------------------------===
8 */
9
10 #ifndef __CPUID_H
11 #define __CPUID_H
12
13 #if !(__x86_64__ || __i386__)
14 #error this header is for x86 only
15 #endif
16
17 /* Responses identification request with %eax 0 */
18 /* AMD: "AuthenticAMD" */
19 #define signature_AMD_ebx 0x68747541
20 #define signature_AMD_edx 0x69746e65
21 #define signature_AMD_ecx 0x444d4163
22 /* CENTAUR: "CentaurHauls" */
23 #define signature_CENTAUR_ebx 0x746e6543
24 #define signature_CENTAUR_edx 0x48727561
25 #define signature_CENTAUR_ecx 0x736c7561
26 /* CYRIX: "CyrixInstead" */
27 #define signature_CYRIX_ebx 0x69727943
28 #define signature_CYRIX_edx 0x736e4978
29 #define signature_CYRIX_ecx 0x64616574
30 /* HYGON: "HygonGenuine" */
31 #define signature_HYGON_ebx 0x6f677948
32 #define signature_HYGON_edx 0x6e65476e
33 #define signature_HYGON_ecx 0x656e6975
34 /* INTEL: "GenuineIntel" */
35 #define signature_INTEL_ebx 0x756e6547
36 #define signature_INTEL_edx 0x49656e69
37 #define signature_INTEL_ecx 0x6c65746e
38 /* TM1: "TransmetaCPU" */
39 #define signature_TM1_ebx 0x6e617254
40 #define signature_TM1_edx 0x74656d73
41 #define signature_TM1_ecx 0x55504361
42 /* TM2: "GenuineTMx86" */
43 #define signature_TM2_ebx 0x756e6547
44 #define signature_TM2_edx 0x54656e69
45 #define signature_TM2_ecx 0x3638784d
46 /* NSC: "Geode by NSC" */
47 #define signature_NSC_ebx 0x646f6547
48 #define signature_NSC_edx 0x79622065
49 #define signature_NSC_ecx 0x43534e20
50 /* NEXGEN: "NexGenDriven" */
51 #define signature_NEXGEN_ebx 0x4778654e
52 #define signature_NEXGEN_edx 0x72446e65
53 #define signature_NEXGEN_ecx 0x6e657669
54 /* RISE: "RiseRiseRise" */
55 #define signature_RISE_ebx 0x65736952
56 #define signature_RISE_edx 0x65736952
57 #define signature_RISE_ecx 0x65736952
58 /* SIS: "SiS SiS SiS " */
59 #define signature_SIS_ebx 0x20536953
60 #define signature_SIS_edx 0x20536953
61 #define signature_SIS_ecx 0x20536953
62 /* UMC: "UMC UMC UMC " */
63 #define signature_UMC_ebx 0x20434d55
64 #define signature_UMC_edx 0x20434d55
65 #define signature_UMC_ecx 0x20434d55
66 /* VIA: "VIA VIA VIA " */
67 #define signature_VIA_ebx 0x20414956
68 #define signature_VIA_edx 0x20414956
69 #define signature_VIA_ecx 0x20414956
70 /* VORTEX: "Vortex86 SoC" */
71 #define signature_VORTEX_ebx 0x74726f56
72 #define signature_VORTEX_edx 0x36387865
73 #define signature_VORTEX_ecx 0x436f5320
74
75 /* Features in %ecx for leaf 1 */
76 #define bit_SSE3 0x00000001
77 #define bit_PCLMULQDQ 0x00000002
78 #define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */
79 #define bit_DTES64 0x00000004
80 #define bit_MONITOR 0x00000008
81 #define bit_DSCPL 0x00000010
82 #define bit_VMX 0x00000020
83 #define bit_SMX 0x00000040
84 #define bit_EIST 0x00000080
85 #define bit_TM2 0x00000100
86 #define bit_SSSE3 0x00000200
87 #define bit_CNXTID 0x00000400
88 #define bit_FMA 0x00001000
89 #define bit_CMPXCHG16B 0x00002000
90 #define bit_xTPR 0x00004000
91 #define bit_PDCM 0x00008000
92 #define bit_PCID 0x00020000
93 #define bit_DCA 0x00040000
94 #define bit_SSE41 0x00080000
95 #define bit_SSE4_1 bit_SSE41 /* for gcc compat */
96 #define bit_SSE42 0x00100000
97 #define bit_SSE4_2 bit_SSE42 /* for gcc compat */
98 #define bit_x2APIC 0x00200000
99 #define bit_MOVBE 0x00400000
100 #define bit_POPCNT 0x00800000
101 #define bit_TSCDeadline 0x01000000
102 #define bit_AESNI 0x02000000
103 #define bit_AES bit_AESNI /* for gcc compat */
104 #define bit_XSAVE 0x04000000
105 #define bit_OSXSAVE 0x08000000
106 #define bit_AVX 0x10000000
107 #define bit_F16C 0x20000000
108 #define bit_RDRND 0x40000000
109
110 /* Features in %edx for leaf 1 */
111 #define bit_FPU 0x00000001
112 #define bit_VME 0x00000002
113 #define bit_DE 0x00000004
114 #define bit_PSE 0x00000008
115 #define bit_TSC 0x00000010
116 #define bit_MSR 0x00000020
117 #define bit_PAE 0x00000040
118 #define bit_MCE 0x00000080
119 #define bit_CX8 0x00000100
120 #define bit_CMPXCHG8B bit_CX8 /* for gcc compat */
121 #define bit_APIC 0x00000200
122 #define bit_SEP 0x00000800
123 #define bit_MTRR 0x00001000
124 #define bit_PGE 0x00002000
125 #define bit_MCA 0x00004000
126 #define bit_CMOV 0x00008000
127 #define bit_PAT 0x00010000
128 #define bit_PSE36 0x00020000
129 #define bit_PSN 0x00040000
130 #define bit_CLFSH 0x00080000
131 #define bit_DS 0x00200000
132 #define bit_ACPI 0x00400000
133 #define bit_MMX 0x00800000
134 #define bit_FXSR 0x01000000
135 #define bit_FXSAVE bit_FXSR /* for gcc compat */
136 #define bit_SSE 0x02000000
137 #define bit_SSE2 0x04000000
138 #define bit_SS 0x08000000
139 #define bit_HTT 0x10000000
140 #define bit_TM 0x20000000
141 #define bit_PBE 0x80000000
142
143 /* Features in %ebx for leaf 7 sub-leaf 0 */
144 #define bit_FSGSBASE 0x00000001
145 #define bit_SGX 0x00000004
146 #define bit_BMI 0x00000008
147 #define bit_HLE 0x00000010
148 #define bit_AVX2 0x00000020
149 #define bit_SMEP 0x00000080
150 #define bit_BMI2 0x00000100
151 #define bit_ENH_MOVSB 0x00000200
152 #define bit_INVPCID 0x00000400
153 #define bit_RTM 0x00000800
154 #define bit_MPX 0x00004000
155 #define bit_AVX512F 0x00010000
156 #define bit_AVX512DQ 0x00020000
157 #define bit_RDSEED 0x00040000
158 #define bit_ADX 0x00080000
159 #define bit_AVX512IFMA 0x00200000
160 #define bit_CLFLUSHOPT 0x00800000
161 #define bit_CLWB 0x01000000
162 #define bit_AVX512PF 0x04000000
163 #define bit_AVX512ER 0x08000000
164 #define bit_AVX512CD 0x10000000
165 #define bit_SHA 0x20000000
166 #define bit_AVX512BW 0x40000000
167 #define bit_AVX512VL 0x80000000
168
169 /* Features in %ecx for leaf 7 sub-leaf 0 */
170 #define bit_PREFTCHWT1 0x00000001
171 #define bit_AVX512VBMI 0x00000002
172 #define bit_PKU 0x00000004
173 #define bit_OSPKE 0x00000010
174 #define bit_WAITPKG 0x00000020
175 #define bit_AVX512VBMI2 0x00000040
176 #define bit_SHSTK 0x00000080
177 #define bit_GFNI 0x00000100
178 #define bit_VAES 0x00000200
179 #define bit_VPCLMULQDQ 0x00000400
180 #define bit_AVX512VNNI 0x00000800
181 #define bit_AVX512BITALG 0x00001000
182 #define bit_AVX512VPOPCNTDQ 0x00004000
183 #define bit_RDPID 0x00400000
184 #define bit_CLDEMOTE 0x02000000
185 #define bit_MOVDIRI 0x08000000
186 #define bit_MOVDIR64B 0x10000000
187 #define bit_ENQCMD 0x20000000
188
189 /* Features in %edx for leaf 7 sub-leaf 0 */
190 #define bit_AVX5124VNNIW 0x00000004
191 #define bit_AVX5124FMAPS 0x00000008
192 #define bit_UINTR 0x00000020
193 #define bit_SERIALIZE 0x00004000
194 #define bit_TSXLDTRK 0x00010000
195 #define bit_PCONFIG 0x00040000
196 #define bit_IBT 0x00100000
197 #define bit_AMXBF16 0x00400000
198 #define bit_AVX512FP16 0x00800000
199 #define bit_AMXTILE 0x01000000
200 #define bit_AMXINT8 0x02000000
201
202 /* Features in %eax for leaf 7 sub-leaf 1 */
203 #define bit_RAOINT 0x00000008
204 #define bit_AVXVNNI 0x00000010
205 #define bit_AVX512BF16 0x00000020
206 #define bit_CMPCCXADD 0x00000080
207 #define bit_AMXFP16 0x00200000
208 #define bit_HRESET 0x00400000
209 #define bit_AVXIFMA 0x00800000
210
211 /* Features in %edx for leaf 7 sub-leaf 1 */
212 #define bit_AVXVNNIINT8 0x00000010
213 #define bit_AVXNECONVERT 0x00000020
214 #define bit_PREFETCHI 0x00004000
215
216 /* Features in %eax for leaf 13 sub-leaf 1 */
217 #define bit_XSAVEOPT 0x00000001
218 #define bit_XSAVEC 0x00000002
219 #define bit_XSAVES 0x00000008
220
221 /* Features in %eax for leaf 0x14 sub-leaf 0 */
222 #define bit_PTWRITE 0x00000010
223
224 /* Features in %ecx for leaf 0x80000001 */
225 #define bit_LAHF_LM 0x00000001
226 #define bit_ABM 0x00000020
227 #define bit_LZCNT bit_ABM /* for gcc compat */
228 #define bit_SSE4a 0x00000040
229 #define bit_PRFCHW 0x00000100
230 #define bit_XOP 0x00000800
231 #define bit_LWP 0x00008000
232 #define bit_FMA4 0x00010000
233 #define bit_TBM 0x00200000
234 #define bit_MWAITX 0x20000000
235
236 /* Features in %edx for leaf 0x80000001 */
237 #define bit_MMXEXT 0x00400000
238 #define bit_LM 0x20000000
239 #define bit_3DNOWP 0x40000000
240 #define bit_3DNOW 0x80000000
241
242 /* Features in %ebx for leaf 0x80000008 */
243 #define bit_CLZERO 0x00000001
244 #define bit_RDPRU 0x00000010
245 #define bit_WBNOINVD 0x00000200
246
247
248 #if __i386__
249 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
250 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
251 : "0"(__leaf))
252
253 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
254 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
255 : "0"(__leaf), "2"(__count))
256 #else
257 /* x86-64 uses %rbx as the base register, so preserve it. */
258 #define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
259 __asm(" xchgq %%rbx,%q1\n" \
260 " cpuid\n" \
261 " xchgq %%rbx,%q1" \
262 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
263 : "0"(__leaf))
264
265 #define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
266 __asm(" xchgq %%rbx,%q1\n" \
267 " cpuid\n" \
268 " xchgq %%rbx,%q1" \
269 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
270 : "0"(__leaf), "2"(__count))
271 #endif
272
__get_cpuid_max(unsigned int __leaf,unsigned int * __sig)273 static __inline unsigned int __get_cpuid_max (unsigned int __leaf,
274 unsigned int *__sig)
275 {
276 unsigned int __eax, __ebx, __ecx, __edx;
277 #if __i386__
278 int __cpuid_supported;
279
280 __asm(" pushfl\n"
281 " popl %%eax\n"
282 " movl %%eax,%%ecx\n"
283 " xorl $0x00200000,%%eax\n"
284 " pushl %%eax\n"
285 " popfl\n"
286 " pushfl\n"
287 " popl %%eax\n"
288 " movl $0,%0\n"
289 " cmpl %%eax,%%ecx\n"
290 " je 1f\n"
291 " movl $1,%0\n"
292 "1:"
293 : "=r" (__cpuid_supported) : : "eax", "ecx");
294 if (!__cpuid_supported)
295 return 0;
296 #endif
297
298 __cpuid(__leaf, __eax, __ebx, __ecx, __edx);
299 if (__sig)
300 *__sig = __ebx;
301 return __eax;
302 }
303
__get_cpuid(unsigned int __leaf,unsigned int * __eax,unsigned int * __ebx,unsigned int * __ecx,unsigned int * __edx)304 static __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax,
305 unsigned int *__ebx, unsigned int *__ecx,
306 unsigned int *__edx)
307 {
308 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
309
310 if (__max_leaf == 0 || __max_leaf < __leaf)
311 return 0;
312
313 __cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx);
314 return 1;
315 }
316
__get_cpuid_count(unsigned int __leaf,unsigned int __subleaf,unsigned int * __eax,unsigned int * __ebx,unsigned int * __ecx,unsigned int * __edx)317 static __inline int __get_cpuid_count (unsigned int __leaf,
318 unsigned int __subleaf,
319 unsigned int *__eax, unsigned int *__ebx,
320 unsigned int *__ecx, unsigned int *__edx)
321 {
322 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
323
324 if (__max_leaf == 0 || __max_leaf < __leaf)
325 return 0;
326
327 __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
328 return 1;
329 }
330
331 #endif /* __CPUID_H */
332