diff options
Diffstat (limited to 'sysdeps/x86/dl-hwcap.h')
| -rw-r--r-- | sysdeps/x86/dl-hwcap.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/x86/dl-hwcap.h b/sysdeps/x86/dl-hwcap.h new file mode 100644 index 0000000000..f5e9d542ca --- /dev/null +++ b/sysdeps/x86/dl-hwcap.h @@ -0,0 +1,77 @@ +/* x86 version of hardware capability information handling macros. + Copyright (C) 2017-2018 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _DL_HWCAP_H +#define _DL_HWCAP_H + +#if IS_IN (ldconfig) +/* Since ldconfig processes both i386 and x86-64 libraries, it needs + to cover all platforms and hardware capabilities. */ +# define HWCAP_PLATFORMS_START 0 +# define HWCAP_PLATFORMS_COUNT 4 +# define HWCAP_START 0 +# define HWCAP_COUNT 3 +# define HWCAP_IMPORTANT \ + (HWCAP_X86_SSE2 | HWCAP_X86_64 | HWCAP_X86_AVX512_1) +#elif defined __x86_64__ +/* For 64 bit, only cover x86-64 platforms and capabilities. */ +# define HWCAP_PLATFORMS_START 2 +# define HWCAP_PLATFORMS_COUNT 4 +# define HWCAP_START 1 +# define HWCAP_COUNT 3 +# define HWCAP_IMPORTANT (HWCAP_X86_64 | HWCAP_X86_AVX512_1) +#else +/* For 32 bit, only cover i586, i686 and SSE2. */ +# define HWCAP_PLATFORMS_START 0 +# define HWCAP_PLATFORMS_COUNT 2 +# define HWCAP_START 0 +# define HWCAP_COUNT 1 +# define HWCAP_IMPORTANT (HWCAP_X86_SSE2) +#endif + +enum +{ + HWCAP_X86_SSE2 = 1 << 0, + HWCAP_X86_64 = 1 << 1, + HWCAP_X86_AVX512_1 = 1 << 2 +}; + +static inline const char * +__attribute__ ((unused)) +_dl_hwcap_string (int idx) +{ + return GLRO(dl_x86_hwcap_flags)[idx]; +}; + +static inline int +__attribute__ ((unused, always_inline)) +_dl_string_hwcap (const char *str) +{ + int i; + + for (i = HWCAP_START; i < HWCAP_COUNT; i++) + { + if (strcmp (str, GLRO(dl_x86_hwcap_flags)[i]) == 0) + return i; + } + return -1; +}; + +/* We cannot provide a general printing function. */ +#define _dl_procinfo(type, word) -1 + +#endif /* dl-hwcap.h */ |