]>
git.ipfire.org Git - thirdparty/gcc.git/blob - gcc/config/i386/cpuid.h
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_LAHF_LM (1 << 0)
50 #define bit_SSE4a (1 << 6)
51 #define bit_FMA4 (1 << 16)
54 #define bit_LM (1 << 29)
55 #define bit_3DNOWP (1 << 30)
56 #define bit_3DNOW (1 << 31)
59 #if defined(__i386__) && defined(__PIC__)
60 /* %ebx may be the PIC register. */
62 #define __cpuid(level, a, b, c, d) \
63 __asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
65 "xchg{l}\t{%%}ebx, %1\n\t" \
66 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
69 #define __cpuid_count(level, count, a, b, c, d) \
70 __asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
72 "xchg{l}\t{%%}ebx, %1\n\t" \
73 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
74 : "0" (level), "2" (count))
76 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
77 nor alternatives in i386 code. */
78 #define __cpuid(level, a, b, c, d) \
79 __asm__ ("xchgl\t%%ebx, %1\n\t" \
81 "xchgl\t%%ebx, %1\n\t" \
82 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
85 #define __cpuid_count(level, count, a, b, c, d) \
86 __asm__ ("xchgl\t%%ebx, %1\n\t" \
88 "xchgl\t%%ebx, %1\n\t" \
89 : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
90 : "0" (level), "2" (count))
93 #define __cpuid(level, a, b, c, d) \
94 __asm__ ("cpuid\n\t" \
95 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
98 #define __cpuid_count(level, count, a, b, c, d) \
99 __asm__ ("cpuid\n\t" \
100 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
101 : "0" (level), "2" (count))
104 /* Return highest supported input value for cpuid instruction. ext can
105 be either 0x0 or 0x8000000 to return highest supported value for
106 basic or extended cpuid information. Function returns 0 if cpuid
107 is not supported or whatever cpuid returns in eax register. If sig
108 pointer is non-null, then first four bytes of the signature
109 (as found in ebx register) are returned in location pointed by sig. */
111 static __inline
unsigned int
112 __get_cpuid_max (unsigned int __ext
, unsigned int *__sig
)
114 unsigned int __eax
, __ebx
, __ecx
, __edx
;
118 /* See if we can use cpuid. On AMD64 we always can. */
119 __asm__ ("pushf{l|d}\n\t"
122 "mov{l}\t{%0, %1|%1, %0}\n\t"
123 "xor{l}\t{%2, %0|%0, %2}\n\t"
129 : "=&r" (__eax
), "=&r" (__ebx
)
132 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
133 nor alternatives in i386 code. */
134 __asm__ ("pushfl\n\t"
144 : "=&r" (__eax
), "=&r" (__ebx
)
148 if (!((__eax
^ __ebx
) & 0x00200000))
152 /* Host supports cpuid. Return highest supported cpuid input value. */
153 __cpuid (__ext
, __eax
, __ebx
, __ecx
, __edx
);
161 /* Return cpuid data for requested cpuid level, as found in returned
162 eax, ebx, ecx and edx registers. The function checks if cpuid is
163 supported and returns 1 for valid cpuid information or 0 for
164 unsupported cpuid level. All pointers are required to be non-null. */
167 __get_cpuid (unsigned int __level
,
168 unsigned int *__eax
, unsigned int *__ebx
,
169 unsigned int *__ecx
, unsigned int *__edx
)
171 unsigned int __ext
= __level
& 0x80000000;
173 if (__get_cpuid_max (__ext
, 0) < __level
)
176 __cpuid (__level
, *__eax
, *__ebx
, *__ecx
, *__edx
);