projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 425ce2ed UD |
1 | /* This file is part of the GNU C Library. |
| 2 | Copyright (C) 2008 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Lesser General Public | |
| 15 | License along with the GNU C Library; if not, write to the Free | |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 17 | 02111-1307 USA. */ | |
| 18 | ||
| 19 | #include <sys/param.h> | |
| 20 | ||
| 21 | enum | |
| 22 | { | |
| 23 | INTEL_CPUID_INDEX_1 = 0, | |
| 24 | /* Keep the following line at the end. */ | |
| 25 | INTEL_CPUID_INDEX_MAX | |
| 26 | }; | |
| 27 | ||
| 28 | enum | |
| 29 | { | |
| 30 | AMD_CPUID_INDEX_1 = 0, | |
| 31 | /* Keep the following line at the end. */ | |
| 32 | AMD_CPUID_INDEX_MAX | |
| 33 | }; | |
| 34 | ||
| 35 | extern struct cpu_features | |
| 36 | { | |
| 37 | enum | |
| 38 | { | |
| 39 | arch_kind_unknown = 0, | |
| 40 | arch_kind_intel, | |
| 41 | arch_kind_amd, | |
| 42 | arch_kind_other | |
| 43 | } kind; | |
| 44 | int max_cpuid; | |
| 45 | struct | |
| 46 | { | |
| 47 | unsigned int eax; | |
| 48 | unsigned int ebx; | |
| 49 | unsigned int ecx; | |
| 50 | unsigned int edx; | |
| 51 | } cpuid[MAX (INTEL_CPUID_INDEX_MAX, AMD_CPUID_INDEX_MAX)]; | |
| 52 | } __cpu_features attribute_hidden; | |
| 53 | ||
| 54 | ||
| 55 | extern void __init_cpu_features (void) attribute_hidden; | |
| 56 | #define INIT_ARCH()\ | |
| 57 | do \ | |
| 58 | if (__cpu_features.kind == arch_kind_unknown) \ | |
| 59 | __init_cpu_features (); \ | |
| 60 | while (0) | |
| 61 | ||
| 62 | /* Following are the feature tests used throughout libc. */ | |
| 63 | ||
| 64 | #define INTEL_HAS_POPCOUNT \ | |
| 65 | (__cpu_features.kind == arch_kind_intel \ | |
| 66 | && (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ecx & (1 << 23)) != 0) | |
| 67 | ||
| 68 | #define AMD_HAS_POPCOUNT \ | |
| 69 | (__cpu_features.kind == arch_kind_amd \ | |
| 70 | && (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ecx & (1 << 23)) != 0) |