diff options
| -rw-r--r-- | ChangeLog | 24 | ||||
| -rw-r--r-- | sysdeps/i386/i586/init-arch.h | 19 | ||||
| -rw-r--r-- | sysdeps/i386/i686/init-arch.h | 19 | ||||
| -rw-r--r-- | sysdeps/i386/init-arch.h | 19 | ||||
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 8 | ||||
| -rw-r--r-- | sysdeps/x86/cpu-features.h | 20 | ||||
| -rw-r--r-- | sysdeps/x86/init-arch.h | 13 |
7 files changed, 119 insertions, 3 deletions
@@ -1,5 +1,29 @@ 2015-08-27 H.J. Lu <hongjiu.lu@intel.com> + * sysdeps/i386/init-arch.h: New file. + * sysdeps/i386/i586/init-arch.h: Likewise. + * sysdeps/i386/i686/init-arch.h: Likewise. + * sysdeps/x86/cpu-features.c (init_cpu_features): Set bit_I586 + bit if CX8 is available. Set bit_I686 bit if CMOV is available. + * sysdeps/x86/cpu-features.h (bit_I586): New. + (bit_I686): Likewise. + (bit_CX8): Likewise. + (bit_CMOV): Likewise. + (index_CX8): Likewise. + (index_CMOV): Likewise. + (index_I586): Likewise. + (index_I686): Likewise. + (reg_CX8): Likewise. + (reg_CMOV): Likewise. + (HAS_I586): Defined as HAS_ARCH_FEATURE (I586) if i586 isn't + available at compile-time. + (HAS_I686): Defined as HAS_ARCH_FEATURE (I686) if i686 isn't + available at compile-time. + * sysdeps/x86/init-arch.h (USE_I586): New macro. + (USE_I686): Likewise. + +2015-08-27 H.J. Lu <hongjiu.lu@intel.com> + * sysdeps/i386/bcopy.S: New file. * sysdeps/i386/bzero.S: Likewise. * sysdeps/i386/memcpy.S: Likewise. diff --git a/sysdeps/i386/i586/init-arch.h b/sysdeps/i386/i586/init-arch.h new file mode 100644 index 0000000000..50c43a232e --- /dev/null +++ b/sysdeps/i386/i586/init-arch.h @@ -0,0 +1,19 @@ +/* Copyright (C) 2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +#define MINIMUM_ISA 586 +#include <sysdeps/x86/init-arch.h> diff --git a/sysdeps/i386/i686/init-arch.h b/sysdeps/i386/i686/init-arch.h new file mode 100644 index 0000000000..b4a27351ca --- /dev/null +++ b/sysdeps/i386/i686/init-arch.h @@ -0,0 +1,19 @@ +/* Copyright (C) 2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +#define MINIMUM_ISA 686 +#include <sysdeps/x86/init-arch.h> diff --git a/sysdeps/i386/init-arch.h b/sysdeps/i386/init-arch.h new file mode 100644 index 0000000000..0c74ddcf41 --- /dev/null +++ b/sysdeps/i386/init-arch.h @@ -0,0 +1,19 @@ +/* Copyright (C) 2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +#define MINIMUM_ISA 486 +#include <sysdeps/x86/init-arch.h> diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index 40575de611..b03451dde1 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -150,6 +150,14 @@ init_cpu_features (struct cpu_features *cpu_features) else kind = arch_kind_other; + /* Support i586 if CX8 is available. */ + if (HAS_CPU_FEATURE (CX8)) + cpu_features->feature[index_I586] |= bit_I586; + + /* Support i686 if CMOV is available. */ + if (HAS_CPU_FEATURE (CMOV)) + cpu_features->feature[index_I686] |= bit_I686; + if (cpu_features->max_cpuid >= 7) __cpuid_count (7, 0, cpu_features->cpuid[COMMON_CPUID_INDEX_7].eax, diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h index 6e706241ad..80edbee75c 100644 --- a/sysdeps/x86/cpu-features.h +++ b/sysdeps/x86/cpu-features.h @@ -31,10 +31,14 @@ #define bit_AVX_Fast_Unaligned_Load (1 << 11) #define bit_AVX512F_Usable (1 << 12) #define bit_AVX512DQ_Usable (1 << 13) +#define bit_I586 (1 << 14) +#define bit_I686 (1 << 15) /* CPUID Feature flags. */ /* COMMON_CPUID_INDEX_1. */ +#define bit_CX8 (1 << 8) +#define bit_CMOV (1 << 15) #define bit_SSE2 (1 << 26) #define bit_SSSE3 (1 << 9) #define bit_SSE4_1 (1 << 19) @@ -69,6 +73,8 @@ # include <ifunc-defines.h> # include <rtld-global-offsets.h> +# define index_CX8 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET +# define index_CMOV COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET # define index_SSE2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET # define index_SSSE3 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_SSE4_1 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET @@ -89,6 +95,8 @@ # define index_AVX_Fast_Unaligned_Load FEATURE_INDEX_1*FEATURE_SIZE # define index_AVX512F_Usable FEATURE_INDEX_1*FEATURE_SIZE # define index_AVX512DQ_Usable FEATURE_INDEX_1*FEATURE_SIZE +# define index_I586 FEATURE_INDEX_1*FEATURE_SIZE +# define index_I686 FEATURE_INDEX_1*FEATURE_SIZE # if defined (_LIBC) && !IS_IN (nonlib) # ifdef __x86_64__ @@ -193,6 +201,8 @@ extern const struct cpu_features *__get_cpu_features (void) # define HAS_ARCH_FEATURE(name) \ ((__get_cpu_features ()->feature[index_##name] & (bit_##name)) != 0) +# define index_CX8 COMMON_CPUID_INDEX_1 +# define index_CMOV COMMON_CPUID_INDEX_1 # define index_SSE2 COMMON_CPUID_INDEX_1 # define index_SSSE3 COMMON_CPUID_INDEX_1 # define index_SSE4_1 COMMON_CPUID_INDEX_1 @@ -207,6 +217,8 @@ extern const struct cpu_features *__get_cpu_features (void) # define index_POPCOUNT COMMON_CPUID_INDEX_1 # define index_OSXSAVE COMMON_CPUID_INDEX_1 +# define reg_CX8 edx +# define reg_CMOV edx # define reg_SSE2 edx # define reg_SSSE3 ecx # define reg_SSE4_1 ecx @@ -234,6 +246,8 @@ extern const struct cpu_features *__get_cpu_features (void) # define index_AVX_Fast_Unaligned_Load FEATURE_INDEX_1 # define index_AVX512F_Usable FEATURE_INDEX_1 # define index_AVX512DQ_Usable FEATURE_INDEX_1 +# define index_I586 FEATURE_INDEX_1 +# define index_I686 FEATURE_INDEX_1 #endif /* !__ASSEMBLER__ */ @@ -242,7 +256,7 @@ extern const struct cpu_features *__get_cpu_features (void) #elif defined __i586__ || defined __pentium__ # define HAS_CPUID 1 # define HAS_I586 1 -# define HAS_I686 0 +# define HAS_I686 HAS_ARCH_FEATURE (I686) #elif (defined __i686__ || defined __pentiumpro__ \ || defined __pentium4__ || defined __nocona__ \ || defined __atom__ || defined __core2__ \ @@ -261,8 +275,8 @@ extern const struct cpu_features *__get_cpu_features (void) # define HAS_I686 1 #else # define HAS_CPUID 0 -# define HAS_I586 0 -# define HAS_I686 0 +# define HAS_I586 HAS_ARCH_FEATURE (I586) +# define HAS_I686 HAS_ARCH_FEATURE (I686) #endif #endif /* cpu_features_h */ diff --git a/sysdeps/x86/init-arch.h b/sysdeps/x86/init-arch.h index 2b9988ebc3..55897fabf2 100644 --- a/sysdeps/x86/init-arch.h +++ b/sysdeps/x86/init-arch.h @@ -20,3 +20,16 @@ #else # include <ldsodefs.h> #endif + +#ifndef __x86_64__ +/* Due to the reordering and the other nifty extensions in i686, it is + not really good to use heavily i586 optimized code on an i686. It's + better to use i486 code if it isn't an i586. */ +# if MINIMUM_ISA == 686 +# define USE_I586 0 +# define USE_I686 1 +# else +# define USE_I586 (HAS_ARCH_FEATURE (I586) && !HAS_ARCH_FEATURE (I686)) +# define USE_I686 HAS_ARCH_FEATURE (I686) +# endif +#endif |