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