2 * Copyright (C) 2007-2015 Free Software Foundation, Inc.
4 * This file is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 3, or (at your option) any
9 * This file is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * Under Section 7 of GPL version 3, you are granted additional
15 * permissions described in the GCC Runtime Library Exception, version
16 * 3.1, as published by the Free Software Foundation.
18 * You should have received a copy of the GNU General Public License and
19 * a copy of the GCC Runtime Library Exception along with this program;
20 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
21 * <http://www.gnu.org/licenses/>.
25 #define bit_SSE3 (1 << 0)
26 #define bit_PCLMUL (1 << 1)
27 #define bit_LZCNT (1 << 5)
28 #define bit_SSSE3 (1 << 9)
29 #define bit_FMA (1 << 12)
30 #define bit_CMPXCHG16B (1 << 13)
31 #define bit_SSE4_1 (1 << 19)
32 #define bit_SSE4_2 (1 << 20)
33 #define bit_MOVBE (1 << 22)
34 #define bit_POPCNT (1 << 23)
35 #define bit_AES (1 << 25)
36 #define bit_XSAVE (1 << 26)
37 #define bit_OSXSAVE (1 << 27)
38 #define bit_AVX (1 << 28)
39 #define bit_F16C (1 << 29)
40 #define bit_RDRND (1 << 30)
43 #define bit_CMPXCHG8B (1 << 8)
44 #define bit_CMOV (1 << 15)
45 #define bit_MMX (1 << 23)
46 #define bit_FXSAVE (1 << 24)
47 #define bit_SSE (1 << 25)
48 #define bit_SSE2 (1 << 26)
50 /* Extended Features */
52 #define bit_LAHF_LM (1 << 0)
53 #define bit_ABM (1 << 5)
54 #define bit_SSE4a (1 << 6)
55 #define bit_PRFCHW (1 << 8)
56 #define bit_XOP (1 << 11)
57 #define bit_LWP (1 << 15)
58 #define bit_FMA4 (1 << 16)
59 #define bit_TBM (1 << 21)
62 #define bit_MMXEXT (1 << 22)
63 #define bit_LM (1 << 29)
64 #define bit_3DNOWP (1 << 30)
65 #define bit_3DNOW (1 << 31)
67 /* Extended Features (%eax == 7) */
69 #define bit_FSGSBASE (1 << 0)
70 #define bit_BMI (1 << 3)
71 #define bit_HLE (1 << 4)
72 #define bit_AVX2 (1 << 5)
73 #define bit_BMI2 (1 << 8)
74 #define bit_RTM (1 << 11)
75 #define bit_MPX (1 << 14)
76 #define bit_AVX512F (1 << 16)
77 #define bit_AVX512DQ (1 << 17)
78 #define bit_RDSEED (1 << 18)
79 #define bit_ADX (1 << 19)
80 #define bit_AVX512IFMA (1 << 21)
81 #define bit_PCOMMIT (1 << 22)
82 #define bit_CLFLUSHOPT (1 << 23)
83 #define bit_CLWB (1 << 24)
84 #define bit_AVX512PF (1 << 26)
85 #define bit_AVX512ER (1 << 27)
86 #define bit_AVX512CD (1 << 28)
87 #define bit_SHA (1 << 29)
88 #define bit_AVX512BW (1 << 30)
89 #define bit_AVX512VL (1 << 31)
92 #define bit_PREFETCHWT1 (1 << 0)
93 #define bit_AVX512VBMI (1 << 1)
95 /* XFEATURE_ENABLED_MASK register bits (%eax == 13, %ecx == 0) */
96 #define bit_BNDREGS (1 << 3)
97 #define bit_BNDCSR (1 << 4)
99 /* Extended State Enumeration Sub-leaf (%eax == 13, %ecx == 1) */
100 #define bit_XSAVEOPT (1 << 0)
101 #define bit_XSAVEC (1 << 1)
102 #define bit_XSAVES (1 << 3)
104 /* Signatures for different CPU implementations as returned in uses
105 of cpuid with level 0. */
106 #define signature_AMD_ebx 0x68747541
107 #define signature_AMD_ecx 0x444d4163
108 #define signature_AMD_edx 0x69746e65
110 #define signature_CENTAUR_ebx 0x746e6543
111 #define signature_CENTAUR_ecx 0x736c7561
112 #define signature_CENTAUR_edx 0x48727561
114 #define signature_CYRIX_ebx 0x69727943
115 #define signature_CYRIX_ecx 0x64616574
116 #define signature_CYRIX_edx 0x736e4978
118 #define signature_INTEL_ebx 0x756e6547
119 #define signature_INTEL_ecx 0x6c65746e
120 #define signature_INTEL_edx 0x49656e69
122 #define signature_TM1_ebx 0x6e617254
123 #define signature_TM1_ecx 0x55504361
124 #define signature_TM1_edx 0x74656d73
126 #define signature_TM2_ebx 0x756e6547
127 #define signature_TM2_ecx 0x3638784d
128 #define signature_TM2_edx 0x54656e69
130 #define signature_NSC_ebx 0x646f6547
131 #define signature_NSC_ecx 0x43534e20
132 #define signature_NSC_edx 0x79622065
134 #define signature_NEXGEN_ebx 0x4778654e
135 #define signature_NEXGEN_ecx 0x6e657669
136 #define signature_NEXGEN_edx 0x72446e65
138 #define signature_RISE_ebx 0x65736952
139 #define signature_RISE_ecx 0x65736952
140 #define signature_RISE_edx 0x65736952
142 #define signature_SIS_ebx 0x20536953
143 #define signature_SIS_ecx 0x20536953
144 #define signature_SIS_edx 0x20536953
146 #define signature_UMC_ebx 0x20434d55
147 #define signature_UMC_ecx 0x20434d55
148 #define signature_UMC_edx 0x20434d55
150 #define signature_VIA_ebx 0x20414956
151 #define signature_VIA_ecx 0x20414956
152 #define signature_VIA_edx 0x20414956
154 #define signature_VORTEX_ebx 0x74726f56
155 #define signature_VORTEX_ecx 0x436f5320
156 #define signature_VORTEX_edx 0x36387865
158 #define __cpuid(level, a, b, c, d) \
159 __asm__ ("cpuid\n\t" \
160 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
163 #define __cpuid_count(level, count, a, b, c, d) \
164 __asm__ ("cpuid\n\t" \
165 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
166 : "0" (level), "2" (count))
169 /* Return highest supported input value for cpuid instruction. ext can
170 be either 0x0 or 0x8000000 to return highest supported value for
171 basic or extended cpuid information. Function returns 0 if cpuid
172 is not supported or whatever cpuid returns in eax register. If sig
173 pointer is non-null, then first four bytes of the signature
174 (as found in ebx register) are returned in location pointed by sig. */
176 static __inline unsigned int
177 __get_cpuid_max (unsigned int __ext, unsigned int *__sig)
179 unsigned int __eax, __ebx, __ecx, __edx;
182 /* See if we can use cpuid. On AMD64 we always can. */
184 __asm__ ("pushf{l|d}\n\t"
187 "mov{l}\t{%0, %1|%1, %0}\n\t"
188 "xor{l}\t{%2, %0|%0, %2}\n\t"
194 : "=&r" (__eax), "=&r" (__ebx)
197 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
198 nor alternatives in i386 code. */
199 __asm__ ("pushfl\n\t"
209 : "=&r" (__eax), "=&r" (__ebx)
213 if (!((__eax ^ __ebx) & 0x00200000))
217 /* Host supports cpuid. Return highest supported cpuid input value. */
218 __cpuid (__ext, __eax, __ebx, __ecx, __edx);
226 /* Return cpuid data for requested cpuid level, as found in returned
227 eax, ebx, ecx and edx registers. The function checks if cpuid is
228 supported and returns 1 for valid cpuid information or 0 for
229 unsupported cpuid level. All pointers are required to be non-null. */
232 __get_cpuid (unsigned int __level,
233 unsigned int *__eax, unsigned int *__ebx,
234 unsigned int *__ecx, unsigned int *__edx)
236 unsigned int __ext = __level & 0x80000000;
238 if (__get_cpuid_max (__ext, 0) < __level)
241 __cpuid (__level, *__eax, *__ebx, *__ecx, *__edx);