2 * Copyright (C) 2007, 2008, 2009 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_SSSE3 (1 << 9)
28 #define bit_FMA (1 << 12)
29 #define bit_CMPXCHG16B (1 << 13)
30 #define bit_SSE4_1 (1 << 19)
31 #define bit_SSE4_2 (1 << 20)
32 #define bit_MOVBE (1 << 22)
33 #define bit_POPCNT (1 << 23)
34 #define bit_AES (1 << 25)
35 #define bit_XSAVE (1 << 26)
36 #define bit_OSXSAVE (1 << 27)
37 #define bit_AVX (1 << 28)
40 #define bit_CMPXCHG8B (1 << 8)
41 #define bit_CMOV (1 << 15)
42 #define bit_MMX (1 << 23)
43 #define bit_FXSAVE (1 << 24)
44 #define bit_SSE (1 << 25)
45 #define bit_SSE2 (1 << 26)
47 /* Extended Features */
49 #define bit_FMA4 (1 << 16)
50 #define bit_LAHF_LM (1 << 0)
51 #define bit_SSE4a (1 << 6)
52 #define bit_XOP (1 << 11)
55 #define bit_LM (1 << 29)
56 #define bit_3DNOWP (1 << 30)
57 #define bit_3DNOW (1 << 31)
60 #if defined(__i386__) && defined(__PIC__)
61 /* %ebx may be the PIC register. */
63 #define __cpuid(level, a, b, c, d) \
64 __asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
66 "xchg{l}\t{%%}ebx, %1\n\t" \
67 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
70 #define __cpuid_count(level, count, a, b, c, d) \
71 __asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
73 "xchg{l}\t{%%}ebx, %1\n\t" \
74 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
75 : "0" (level), "2" (count))
77 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
78 nor alternatives in i386 code. */
79 #define __cpuid(level, a, b, c, d) \
80 __asm__ ("xchgl\t%%ebx, %1\n\t" \
82 "xchgl\t%%ebx, %1\n\t" \
83 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
86 #define __cpuid_count(level, count, a, b, c, d) \
87 __asm__ ("xchgl\t%%ebx, %1\n\t" \
89 "xchgl\t%%ebx, %1\n\t" \
90 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
91 : "0" (level), "2" (count))
94 #define __cpuid(level, a, b, c, d) \
95 __asm__ ("cpuid\n\t" \
96 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
99 #define __cpuid_count(level, count, a, b, c, d) \
100 __asm__ ("cpuid\n\t" \
101 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
102 : "0" (level), "2" (count))
105 /* Return highest supported input value for cpuid instruction. ext can
106 be either 0x0 or 0x8000000 to return highest supported value for
107 basic or extended cpuid information. Function returns 0 if cpuid
108 is not supported or whatever cpuid returns in eax register. If sig
109 pointer is non-null, then first four bytes of the signature
110 (as found in ebx register) are returned in location pointed by sig. */
112 static __inline unsigned int
113 __get_cpuid_max (unsigned int __ext, unsigned int *__sig)
115 unsigned int __eax, __ebx, __ecx, __edx;
119 /* See if we can use cpuid. On AMD64 we always can. */
120 __asm__ ("pushf{l|d}\n\t"
123 "mov{l}\t{%0, %1|%1, %0}\n\t"
124 "xor{l}\t{%2, %0|%0, %2}\n\t"
130 : "=&r" (__eax), "=&r" (__ebx)
133 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
134 nor alternatives in i386 code. */
135 __asm__ ("pushfl\n\t"
145 : "=&r" (__eax), "=&r" (__ebx)
149 if (!((__eax ^ __ebx) & 0x00200000))
153 /* Host supports cpuid. Return highest supported cpuid input value. */
154 __cpuid (__ext, __eax, __ebx, __ecx, __edx);
162 /* Return cpuid data for requested cpuid level, as found in returned
163 eax, ebx, ecx and edx registers. The function checks if cpuid is
164 supported and returns 1 for valid cpuid information or 0 for
165 unsupported cpuid level. All pointers are required to be non-null. */
168 __get_cpuid (unsigned int __level,
169 unsigned int *__eax, unsigned int *__ebx,
170 unsigned int *__ecx, unsigned int *__edx)
172 unsigned int __ext = __level & 0x80000000;
174 if (__get_cpuid_max (__ext, 0) < __level)
177 __cpuid (__level, *__eax, *__ebx, *__ecx, *__edx);