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Add _dl_x86_cpu_features to rtld_global
This patch adds _dl_x86_cpu_features to rtld_global in x86 ld.so and initializes it early before __libc_start_main is called so that cpu_features is always available when it is used and we can avoid calling __init_cpu_features in IFUNC selectors. * sysdeps/i386/dl-machine.h: Include <cpu-features.c>. (dl_platform_init): Call init_cpu_features. * sysdeps/i386/dl-procinfo.c (_dl_x86_cpu_features): New. * sysdeps/i386/i686/cacheinfo.c (DISABLE_PREFERRED_MEMORY_INSTRUCTION): Removed. * sysdeps/i386/i686/multiarch/Makefile (aux): Remove init-arch. * sysdeps/i386/i686/multiarch/Versions: Removed. * sysdeps/i386/i686/multiarch/ifunc-defines.sym (KIND_OFFSET): Removed. * sysdeps/i386/ldsodefs.h: Include <cpu-features.h>. * sysdeps/unix/sysv/linux/x86/Makefile (libpthread-sysdep_routines): Remove init-arch. * sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c: Include <sysdeps/x86_64/dl-procinfo.c> instead of sysdeps/generic/dl-procinfo.c>. * sysdeps/x86/Makefile [$(subdir) == csu] (gen-as-const-headers): Add cpu-features-offsets.sym and rtld-global-offsets.sym. [$(subdir) == elf] (sysdep-dl-routines): Add dl-get-cpu-features. [$(subdir) == elf] (tests): Add tst-get-cpu-features. [$(subdir) == elf] (tests-static): Add tst-get-cpu-features-static. * sysdeps/x86/Versions: New file. * sysdeps/x86/cpu-features-offsets.sym: Likewise. * sysdeps/x86/cpu-features.c: Likewise. * sysdeps/x86/cpu-features.h: Likewise. * sysdeps/x86/dl-get-cpu-features.c: Likewise. * sysdeps/x86/libc-start.c: Likewise. * sysdeps/x86/rtld-global-offsets.sym: Likewise. * sysdeps/x86/tst-get-cpu-features-static.c: Likewise. * sysdeps/x86/tst-get-cpu-features.c: Likewise. * sysdeps/x86_64/dl-procinfo.c: Likewise. * sysdeps/x86_64/cacheinfo.c (__cpuid_count): Removed. Assume USE_MULTIARCH is defined and don't check it. (is_intel): Replace __cpu_features with GLRO(dl_x86_cpu_features). (is_amd): Likewise. (max_cpuid): Likewise. (intel_check_word): Likewise. (__cache_sysconf): Don't call __init_cpu_features. (__x86_preferred_memory_instruction): Removed. (init_cacheinfo): Don't call __init_cpu_features. Replace __cpu_features with GLRO(dl_x86_cpu_features). * sysdeps/x86_64/dl-machine.h: <cpu-features.c>. (dl_platform_init): Call init_cpu_features. * sysdeps/x86_64/ldsodefs.h: Include <cpu-features.h>. * sysdeps/x86_64/multiarch/Makefile (aux): Remove init-arch. * sysdeps/x86_64/multiarch/Versions: Removed. * sysdeps/x86_64/multiarch/cacheinfo.c: Likewise. * sysdeps/x86_64/multiarch/init-arch.c: Likewise. * sysdeps/x86_64/multiarch/ifunc-defines.sym (KIND_OFFSET): Removed. * sysdeps/x86_64/multiarch/init-arch.h: Rewrite.
This commit is contained in:
H.J. Lu
parent
63e952d9be
commit
e2e4f56056
54
ChangeLog
54
ChangeLog
@ -1,3 +1,57 @@
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2015-08-13 H.J. Lu <hongjiu.lu@intel.com>
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* sysdeps/i386/dl-machine.h: Include <cpu-features.c>.
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(dl_platform_init): Call init_cpu_features.
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* sysdeps/i386/dl-procinfo.c (_dl_x86_cpu_features): New.
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* sysdeps/i386/i686/cacheinfo.c
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(DISABLE_PREFERRED_MEMORY_INSTRUCTION): Removed.
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* sysdeps/i386/i686/multiarch/Makefile (aux): Remove init-arch.
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* sysdeps/i386/i686/multiarch/Versions: Removed.
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* sysdeps/i386/i686/multiarch/ifunc-defines.sym (KIND_OFFSET):
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Removed.
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* sysdeps/i386/ldsodefs.h: Include <cpu-features.h>.
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* sysdeps/unix/sysv/linux/x86/Makefile
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(libpthread-sysdep_routines): Remove init-arch.
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* sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c: Include
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<sysdeps/x86_64/dl-procinfo.c> instead of
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sysdeps/generic/dl-procinfo.c>.
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* sysdeps/x86/Makefile [$(subdir) == csu] (gen-as-const-headers):
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Add cpu-features-offsets.sym and rtld-global-offsets.sym.
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[$(subdir) == elf] (sysdep-dl-routines): Add dl-get-cpu-features.
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[$(subdir) == elf] (tests): Add tst-get-cpu-features.
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[$(subdir) == elf] (tests-static): Add
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tst-get-cpu-features-static.
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* sysdeps/x86/Versions: New file.
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* sysdeps/x86/cpu-features-offsets.sym: Likewise.
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* sysdeps/x86/cpu-features.c: Likewise.
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* sysdeps/x86/cpu-features.h: Likewise.
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* sysdeps/x86/dl-get-cpu-features.c: Likewise.
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* sysdeps/x86/libc-start.c: Likewise.
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* sysdeps/x86/rtld-global-offsets.sym: Likewise.
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* sysdeps/x86/tst-get-cpu-features-static.c: Likewise.
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* sysdeps/x86/tst-get-cpu-features.c: Likewise.
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* sysdeps/x86_64/dl-procinfo.c: Likewise.
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* sysdeps/x86_64/cacheinfo.c (__cpuid_count): Removed.
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Assume USE_MULTIARCH is defined and don't check it.
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(is_intel): Replace __cpu_features with GLRO(dl_x86_cpu_features).
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(is_amd): Likewise.
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(max_cpuid): Likewise.
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(intel_check_word): Likewise.
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(__cache_sysconf): Don't call __init_cpu_features.
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(__x86_preferred_memory_instruction): Removed.
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(init_cacheinfo): Don't call __init_cpu_features. Replace
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__cpu_features with GLRO(dl_x86_cpu_features).
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* sysdeps/x86_64/dl-machine.h: <cpu-features.c>.
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(dl_platform_init): Call init_cpu_features.
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* sysdeps/x86_64/ldsodefs.h: Include <cpu-features.h>.
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* sysdeps/x86_64/multiarch/Makefile (aux): Remove init-arch.
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* sysdeps/x86_64/multiarch/Versions: Removed.
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* sysdeps/x86_64/multiarch/cacheinfo.c: Likewise.
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* sysdeps/x86_64/multiarch/init-arch.c: Likewise.
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* sysdeps/x86_64/multiarch/ifunc-defines.sym (KIND_OFFSET):
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Removed.
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* sysdeps/x86_64/multiarch/init-arch.h: Rewrite.
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2015-08-12 Paul Pluzhnikov <ppluzhnikov@google.com>
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[BZ #18820]
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@ -25,6 +25,7 @@
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#include <sysdep.h>
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#include <tls.h>
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#include <dl-tlsdesc.h>
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#include <cpu-features.c>
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/* Return nonzero iff ELF header is compatible with the running host. */
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static inline int __attribute__ ((unused))
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@ -235,6 +236,8 @@ dl_platform_init (void)
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if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
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/* Avoid an empty string which would disturb us. */
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GLRO(dl_platform) = NULL;
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init_cpu_features (&GLRO(dl_x86_cpu_features));
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}
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static inline Elf32_Addr
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@ -43,6 +43,22 @@
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# define PROCINFO_CLASS
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#endif
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#if !IS_IN (ldconfig)
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# if !defined PROCINFO_DECL && defined SHARED
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._dl_x86_cpu_features
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# else
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PROCINFO_CLASS struct cpu_features _dl_x86_cpu_features
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# endif
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# ifndef PROCINFO_DECL
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= { }
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# endif
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# if !defined SHARED || defined PROCINFO_DECL
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;
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# else
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,
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# endif
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#endif
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#if !defined PROCINFO_DECL && defined SHARED
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._dl_x86_cap_flags
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#else
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@ -1,4 +1,3 @@
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#define DISABLE_PREFETCHW
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#define DISABLE_PREFERRED_MEMORY_INSTRUCTION
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#include <sysdeps/x86_64/cacheinfo.c>
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@ -1,5 +1,4 @@
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ifeq ($(subdir),csu)
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aux += init-arch
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tests += test-multiarch
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gen-as-const-headers += ifunc-defines.sym
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endif
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@ -4,7 +4,6 @@
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--
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CPU_FEATURES_SIZE sizeof (struct cpu_features)
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KIND_OFFSET offsetof (struct cpu_features, kind)
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CPUID_OFFSET offsetof (struct cpu_features, cpuid)
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CPUID_SIZE sizeof (struct cpuid_registers)
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CPUID_EAX_OFFSET offsetof (struct cpuid_registers, eax)
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@ -20,6 +20,7 @@
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#define _I386_LDSODEFS_H 1
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#include <elf.h>
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#include <cpu-features.h>
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struct La_i86_regs;
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struct La_i86_retval;
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@ -15,7 +15,6 @@ sysdep_headers += sys/elf.h sys/perm.h sys/reg.h sys/vm86.h sys/debugreg.h sys/i
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endif
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ifeq ($(subdir),nptl)
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libpthread-sysdep_routines += init-arch
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libpthread-sysdep_routines += elision-lock elision-unlock elision-timed \
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elision-trylock
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endif
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@ -1,5 +1,5 @@
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#if IS_IN (ldconfig)
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# include <sysdeps/i386/dl-procinfo.c>
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#else
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# include <sysdeps/generic/dl-procinfo.c>
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# include <sysdeps/x86_64/dl-procinfo.c>
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#endif
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@ -8,3 +8,14 @@ $(objpfx)tst-ld-sse-use.out: ../sysdeps/x86/tst-ld-sse-use.sh $(objpfx)ld.so
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$(BASH) $< $(objpfx) '$(NM)' '$(OBJDUMP)' '$(READELF)' > $@; \
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$(evaluate-test)
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endif
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ifeq ($(subdir),csu)
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gen-as-const-headers += cpu-features-offsets.sym rtld-global-offsets.sym
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endif
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ifeq ($(subdir),elf)
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sysdep-dl-routines += dl-get-cpu-features
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tests += tst-get-cpu-features
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tests-static += tst-get-cpu-features-static
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endif
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@ -1,4 +1,4 @@
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libc {
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ld {
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GLIBC_PRIVATE {
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__get_cpu_features;
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}
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7
sysdeps/x86/cpu-features-offsets.sym
Normal file
7
sysdeps/x86/cpu-features-offsets.sym
Normal file
@ -0,0 +1,7 @@
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#define SHARED 1
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#include <ldsodefs.h>
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#define rtld_global_ro_offsetof(mem) offsetof (struct rtld_global_ro, mem)
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RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET rtld_global_ro_offsetof (_dl_x86_cpu_features)
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@ -1,7 +1,6 @@
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/* Initialize CPU feature data.
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This file is part of the GNU C Library.
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Copyright (C) 2008-2015 Free Software Foundation, Inc.
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Contributed by Ulrich Drepper <drepper@redhat.com>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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@ -17,48 +16,40 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <atomic.h>
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#include <cpuid.h>
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#include "init-arch.h"
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#include <cpu-features.h>
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struct cpu_features __cpu_features attribute_hidden;
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static void
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get_common_indeces (unsigned int *family, unsigned int *model)
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static inline void
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get_common_indeces (struct cpu_features *cpu_features,
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unsigned int *family, unsigned int *model)
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{
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__cpuid (1, __cpu_features.cpuid[COMMON_CPUID_INDEX_1].eax,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ebx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_1].edx);
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unsigned int eax = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].eax;
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unsigned int eax;
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__cpuid (1, eax, cpu_features->cpuid[COMMON_CPUID_INDEX_1].ebx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_1].edx);
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GLRO(dl_x86_cpu_features).cpuid[COMMON_CPUID_INDEX_1].eax = eax;
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*family = (eax >> 8) & 0x0f;
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*model = (eax >> 4) & 0x0f;
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}
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void
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__init_cpu_features (void)
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static inline void
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init_cpu_features (struct cpu_features *cpu_features)
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{
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unsigned int ebx;
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unsigned int ecx;
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unsigned int edx;
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unsigned int ebx, ecx, edx;
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unsigned int family = 0;
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unsigned int model = 0;
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enum cpu_features_kind kind;
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__cpuid (0, __cpu_features.max_cpuid, ebx, ecx, edx);
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__cpuid (0, cpu_features->max_cpuid, ebx, ecx, edx);
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/* This spells out "GenuineIntel". */
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if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
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{
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kind = arch_kind_intel;
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get_common_indeces (&family, &model);
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get_common_indeces (cpu_features, &family, &model);
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unsigned int eax = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].eax;
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unsigned int eax = cpu_features->cpuid[COMMON_CPUID_INDEX_1].eax;
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unsigned int extended_family = (eax >> 20) & 0xff;
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unsigned int extended_model = (eax >> 12) & 0xf0;
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if (family == 0x0f)
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@ -68,14 +59,14 @@ __init_cpu_features (void)
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}
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else if (family == 0x06)
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{
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ecx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx;
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ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;
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model += extended_model;
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switch (model)
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{
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case 0x1c:
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case 0x26:
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/* BSF is slow on Atom. */
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__cpu_features.feature[index_Slow_BSF] |= bit_Slow_BSF;
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cpu_features->feature[index_Slow_BSF] |= bit_Slow_BSF;
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break;
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case 0x37:
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@ -91,7 +82,7 @@ __init_cpu_features (void)
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#if index_Fast_Unaligned_Load != index_Slow_SSE4_2
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# error index_Fast_Unaligned_Load != index_Slow_SSE4_2
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#endif
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__cpu_features.feature[index_Fast_Unaligned_Load]
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cpu_features->feature[index_Fast_Unaligned_Load]
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|= (bit_Fast_Unaligned_Load
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| bit_Prefer_PMINUB_for_stringop
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| bit_Slow_SSE4_2);
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@ -121,7 +112,7 @@ __init_cpu_features (void)
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#if index_Fast_Rep_String != index_Prefer_PMINUB_for_stringop
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# error index_Fast_Rep_String != index_Prefer_PMINUB_for_stringop
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#endif
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__cpu_features.feature[index_Fast_Rep_String]
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cpu_features->feature[index_Fast_Rep_String]
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|= (bit_Fast_Rep_String
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| bit_Fast_Copy_Backward
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| bit_Fast_Unaligned_Load
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@ -135,31 +126,31 @@ __init_cpu_features (void)
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{
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kind = arch_kind_amd;
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get_common_indeces (&family, &model);
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get_common_indeces (cpu_features, &family, &model);
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ecx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx;
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ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;
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unsigned int eax;
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__cpuid (0x80000000, eax, ebx, ecx, edx);
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if (eax >= 0x80000001)
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__cpuid (0x80000001,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].eax,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ebx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ecx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].edx);
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cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].eax,
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cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ebx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ecx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].edx);
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}
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else
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kind = arch_kind_other;
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if (__cpu_features.max_cpuid >= 7)
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if (cpu_features->max_cpuid >= 7)
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__cpuid_count (7, 0,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_7].eax,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_7].ebx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_7].ecx,
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__cpu_features.cpuid[COMMON_CPUID_INDEX_7].edx);
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cpu_features->cpuid[COMMON_CPUID_INDEX_7].eax,
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cpu_features->cpuid[COMMON_CPUID_INDEX_7].ebx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_7].ecx,
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cpu_features->cpuid[COMMON_CPUID_INDEX_7].edx);
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/* Can we call xgetbv? */
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if (CPUID_OSXSAVE)
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if (HAS_CPU_FEATURE (OSXSAVE))
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{
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unsigned int xcrlow;
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unsigned int xcrhigh;
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@ -169,15 +160,15 @@ __init_cpu_features (void)
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(bit_YMM_state | bit_XMM_state))
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{
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/* Determine if AVX is usable. */
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if (CPUID_AVX)
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__cpu_features.feature[index_AVX_Usable] |= bit_AVX_Usable;
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if (HAS_CPU_FEATURE (AVX))
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cpu_features->feature[index_AVX_Usable] |= bit_AVX_Usable;
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#if index_AVX2_Usable != index_AVX_Fast_Unaligned_Load
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# error index_AVX2_Usable != index_AVX_Fast_Unaligned_Load
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#endif
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/* Determine if AVX2 is usable. Unaligned load with 256-bit
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AVX registers are faster on processors with AVX2. */
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if (CPUID_AVX2)
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__cpu_features.feature[index_AVX2_Usable]
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if (HAS_CPU_FEATURE (AVX2))
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cpu_features->feature[index_AVX2_Usable]
|
||||
|= bit_AVX2_Usable | bit_AVX_Fast_Unaligned_Load;
|
||||
/* Check if OPMASK state, upper 256-bit of ZMM0-ZMM15 and
|
||||
ZMM16-ZMM31 state are enabled. */
|
||||
@ -186,38 +177,26 @@ __init_cpu_features (void)
|
||||
(bit_Opmask_state | bit_ZMM0_15_state | bit_ZMM16_31_state))
|
||||
{
|
||||
/* Determine if AVX512F is usable. */
|
||||
if (CPUID_AVX512F)
|
||||
if (HAS_CPU_FEATURE (AVX512F))
|
||||
{
|
||||
__cpu_features.feature[index_AVX512F_Usable]
|
||||
cpu_features->feature[index_AVX512F_Usable]
|
||||
|= bit_AVX512F_Usable;
|
||||
/* Determine if AVX512DQ is usable. */
|
||||
if (CPUID_AVX512DQ)
|
||||
__cpu_features.feature[index_AVX512DQ_Usable]
|
||||
if (HAS_CPU_FEATURE (AVX512DQ))
|
||||
cpu_features->feature[index_AVX512DQ_Usable]
|
||||
|= bit_AVX512DQ_Usable;
|
||||
}
|
||||
}
|
||||
/* Determine if FMA is usable. */
|
||||
if (CPUID_FMA)
|
||||
__cpu_features.feature[index_FMA_Usable] |= bit_FMA_Usable;
|
||||
if (HAS_CPU_FEATURE (FMA))
|
||||
cpu_features->feature[index_FMA_Usable] |= bit_FMA_Usable;
|
||||
/* Determine if FMA4 is usable. */
|
||||
if (CPUID_FMA4)
|
||||
__cpu_features.feature[index_FMA4_Usable] |= bit_FMA4_Usable;
|
||||
if (HAS_CPU_FEATURE (FMA4))
|
||||
cpu_features->feature[index_FMA4_Usable] |= bit_FMA4_Usable;
|
||||
}
|
||||
}
|
||||
|
||||
__cpu_features.family = family;
|
||||
__cpu_features.model = model;
|
||||
atomic_write_barrier ();
|
||||
__cpu_features.kind = kind;
|
||||
}
|
||||
|
||||
#undef __get_cpu_features
|
||||
|
||||
const struct cpu_features *
|
||||
__get_cpu_features (void)
|
||||
{
|
||||
if (__cpu_features.kind == arch_kind_unknown)
|
||||
__init_cpu_features ();
|
||||
|
||||
return &__cpu_features;
|
||||
cpu_features->family = family;
|
||||
cpu_features->model = model;
|
||||
cpu_features->kind = kind;
|
||||
}
|
||||
240
sysdeps/x86/cpu-features.h
Normal file
240
sysdeps/x86/cpu-features.h
Normal file
@ -0,0 +1,240 @@
|
||||
/* This file is part of the GNU C Library.
|
||||
Copyright (C) 2008-2015 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 cpu_features_h
|
||||
#define cpu_features_h
|
||||
|
||||
#define bit_Fast_Rep_String (1 << 0)
|
||||
#define bit_Fast_Copy_Backward (1 << 1)
|
||||
#define bit_Slow_BSF (1 << 2)
|
||||
#define bit_Fast_Unaligned_Load (1 << 4)
|
||||
#define bit_Prefer_PMINUB_for_stringop (1 << 5)
|
||||
#define bit_AVX_Usable (1 << 6)
|
||||
#define bit_FMA_Usable (1 << 7)
|
||||
#define bit_FMA4_Usable (1 << 8)
|
||||
#define bit_Slow_SSE4_2 (1 << 9)
|
||||
#define bit_AVX2_Usable (1 << 10)
|
||||
#define bit_AVX_Fast_Unaligned_Load (1 << 11)
|
||||
#define bit_AVX512F_Usable (1 << 12)
|
||||
#define bit_AVX512DQ_Usable (1 << 13)
|
||||
|
||||
/* CPUID Feature flags. */
|
||||
|
||||
/* COMMON_CPUID_INDEX_1. */
|
||||
#define bit_SSE2 (1 << 26)
|
||||
#define bit_SSSE3 (1 << 9)
|
||||
#define bit_SSE4_1 (1 << 19)
|
||||
#define bit_SSE4_2 (1 << 20)
|
||||
#define bit_OSXSAVE (1 << 27)
|
||||
#define bit_AVX (1 << 28)
|
||||
#define bit_POPCOUNT (1 << 23)
|
||||
#define bit_FMA (1 << 12)
|
||||
#define bit_FMA4 (1 << 16)
|
||||
|
||||
/* COMMON_CPUID_INDEX_7. */
|
||||
#define bit_RTM (1 << 11)
|
||||
#define bit_AVX2 (1 << 5)
|
||||
#define bit_AVX512F (1 << 16)
|
||||
#define bit_AVX512DQ (1 << 17)
|
||||
|
||||
/* XCR0 Feature flags. */
|
||||
#define bit_XMM_state (1 << 1)
|
||||
#define bit_YMM_state (2 << 1)
|
||||
#define bit_Opmask_state (1 << 5)
|
||||
#define bit_ZMM0_15_state (1 << 6)
|
||||
#define bit_ZMM16_31_state (1 << 7)
|
||||
|
||||
/* The integer bit array index for the first set of internal feature bits. */
|
||||
#define FEATURE_INDEX_1 0
|
||||
|
||||
/* The current maximum size of the feature integer bit array. */
|
||||
#define FEATURE_INDEX_MAX 1
|
||||
|
||||
#ifdef __ASSEMBLER__
|
||||
|
||||
# include <ifunc-defines.h>
|
||||
# include <rtld-global-offsets.h>
|
||||
|
||||
# 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
|
||||
# define index_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
||||
# define index_AVX COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
||||
# define index_AVX2 COMMON_CPUID_INDEX_7*CPUID_SIZE+CPUID_EBX_OFFSET
|
||||
|
||||
# define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Slow_BSF FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Fast_Unaligned_Load FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Prefer_PMINUB_for_stringop FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_AVX_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_FMA_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_FMA4_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Slow_SSE4_2 FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_AVX2_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# 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
|
||||
|
||||
# if defined (_LIBC) && !IS_IN (nonlib)
|
||||
# ifdef __x86_64__
|
||||
# ifdef SHARED
|
||||
# if IS_IN (rtld)
|
||||
# define LOAD_RTLD_GLOBAL_RO_RDX
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), _rtld_local_ro+offset+(index_##name)(%rip)
|
||||
# else
|
||||
# define LOAD_RTLD_GLOBAL_RO_RDX \
|
||||
mov _rtld_global_ro@GOTPCREL(%rip), %RDX_LP
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), \
|
||||
RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+offset+(index_##name)(%rdx)
|
||||
# endif
|
||||
# else /* SHARED */
|
||||
# define LOAD_RTLD_GLOBAL_RO_RDX
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), _dl_x86_cpu_features+offset+(index_##name)(%rip)
|
||||
# endif /* !SHARED */
|
||||
# else /* __x86_64__ */
|
||||
# ifdef SHARED
|
||||
# define LOAD_FUNC_GOT_EAX(func) \
|
||||
leal func@GOTOFF(%edx), %eax
|
||||
# if IS_IN (rtld)
|
||||
# define LOAD_GOT_AND_RTLD_GLOBAL_RO \
|
||||
LOAD_PIC_REG(dx)
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), offset+(index_##name)+_rtld_local_ro@GOTOFF(%edx)
|
||||
# else
|
||||
# define LOAD_GOT_AND_RTLD_GLOBAL_RO \
|
||||
LOAD_PIC_REG(dx); \
|
||||
mov _rtld_global_ro@GOT(%edx), %ecx
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), \
|
||||
RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+offset+(index_##name)(%ecx)
|
||||
# endif
|
||||
# else /* SHARED */
|
||||
# define LOAD_FUNC_GOT_EAX(func) \
|
||||
leal func, %eax
|
||||
# define LOAD_GOT_AND_RTLD_GLOBAL_RO
|
||||
# define HAS_FEATURE(offset, name) \
|
||||
testl $(bit_##name), _dl_x86_cpu_features+offset+(index_##name)
|
||||
# endif /* !SHARED */
|
||||
# endif /* !__x86_64__ */
|
||||
# else /* _LIBC && !nonlib */
|
||||
# error "Sorry, <cpu-features.h> is unimplemented for assembler"
|
||||
# endif /* !_LIBC || nonlib */
|
||||
|
||||
/* HAS_* evaluates to true if we may use the feature at runtime. */
|
||||
# define HAS_CPU_FEATURE(name) HAS_FEATURE (CPUID_OFFSET, name)
|
||||
# define HAS_ARCH_FEATURE(name) HAS_FEATURE (FEATURE_OFFSET, name)
|
||||
|
||||
#else /* __ASSEMBLER__ */
|
||||
|
||||
enum
|
||||
{
|
||||
COMMON_CPUID_INDEX_1 = 0,
|
||||
COMMON_CPUID_INDEX_7,
|
||||
COMMON_CPUID_INDEX_80000001, /* for AMD */
|
||||
/* Keep the following line at the end. */
|
||||
COMMON_CPUID_INDEX_MAX
|
||||
};
|
||||
|
||||
struct cpu_features
|
||||
{
|
||||
enum cpu_features_kind
|
||||
{
|
||||
arch_kind_unknown = 0,
|
||||
arch_kind_intel,
|
||||
arch_kind_amd,
|
||||
arch_kind_other
|
||||
} kind;
|
||||
int max_cpuid;
|
||||
struct cpuid_registers
|
||||
{
|
||||
unsigned int eax;
|
||||
unsigned int ebx;
|
||||
unsigned int ecx;
|
||||
unsigned int edx;
|
||||
} cpuid[COMMON_CPUID_INDEX_MAX];
|
||||
unsigned int family;
|
||||
unsigned int model;
|
||||
unsigned int feature[FEATURE_INDEX_MAX];
|
||||
};
|
||||
|
||||
/* Used from outside of glibc to get access to the CPU features
|
||||
structure. */
|
||||
extern const struct cpu_features *__get_cpu_features (void)
|
||||
__attribute__ ((const));
|
||||
|
||||
# if defined (_LIBC) && !IS_IN (nonlib)
|
||||
/* Unused for x86. */
|
||||
# define INIT_ARCH()
|
||||
# define __get_cpu_features() (&GLRO(dl_x86_cpu_features))
|
||||
# endif
|
||||
|
||||
|
||||
/* HAS_* evaluates to true if we may use the feature at runtime. */
|
||||
# define HAS_CPU_FEATURE(name) \
|
||||
((__get_cpu_features ()->cpuid[index_##name].reg_##name & (bit_##name)) != 0)
|
||||
# define HAS_ARCH_FEATURE(name) \
|
||||
((__get_cpu_features ()->feature[index_##name] & (bit_##name)) != 0)
|
||||
|
||||
# define index_SSE2 COMMON_CPUID_INDEX_1
|
||||
# define index_SSSE3 COMMON_CPUID_INDEX_1
|
||||
# define index_SSE4_1 COMMON_CPUID_INDEX_1
|
||||
# define index_SSE4_2 COMMON_CPUID_INDEX_1
|
||||
# define index_AVX COMMON_CPUID_INDEX_1
|
||||
# define index_AVX2 COMMON_CPUID_INDEX_7
|
||||
# define index_AVX512F COMMON_CPUID_INDEX_7
|
||||
# define index_AVX512DQ COMMON_CPUID_INDEX_7
|
||||
# define index_RTM COMMON_CPUID_INDEX_7
|
||||
# define index_FMA COMMON_CPUID_INDEX_1
|
||||
# define index_FMA4 COMMON_CPUID_INDEX_80000001
|
||||
# define index_POPCOUNT COMMON_CPUID_INDEX_1
|
||||
# define index_OSXSAVE COMMON_CPUID_INDEX_1
|
||||
|
||||
# define reg_SSE2 edx
|
||||
# define reg_SSSE3 ecx
|
||||
# define reg_SSE4_1 ecx
|
||||
# define reg_SSE4_2 ecx
|
||||
# define reg_AVX ecx
|
||||
# define reg_AVX2 ebx
|
||||
# define reg_AVX512F ebx
|
||||
# define reg_AVX512DQ ebx
|
||||
# define reg_RTM ebx
|
||||
# define reg_FMA ecx
|
||||
# define reg_FMA4 ecx
|
||||
# define reg_POPCOUNT ecx
|
||||
# define reg_OSXSAVE ecx
|
||||
|
||||
# define index_Fast_Rep_String FEATURE_INDEX_1
|
||||
# define index_Fast_Copy_Backward FEATURE_INDEX_1
|
||||
# define index_Slow_BSF FEATURE_INDEX_1
|
||||
# define index_Fast_Unaligned_Load FEATURE_INDEX_1
|
||||
# define index_Prefer_PMINUB_for_stringop FEATURE_INDEX_1
|
||||
# define index_AVX_Usable FEATURE_INDEX_1
|
||||
# define index_FMA_Usable FEATURE_INDEX_1
|
||||
# define index_FMA4_Usable FEATURE_INDEX_1
|
||||
# define index_Slow_SSE4_2 FEATURE_INDEX_1
|
||||
# define index_AVX2_Usable FEATURE_INDEX_1
|
||||
# define index_AVX_Fast_Unaligned_Load FEATURE_INDEX_1
|
||||
# define index_AVX512F_Usable FEATURE_INDEX_1
|
||||
# define index_AVX512DQ_Usable FEATURE_INDEX_1
|
||||
|
||||
#endif /* !__ASSEMBLER__ */
|
||||
|
||||
#endif /* cpu_features_h */
|
||||
27
sysdeps/x86/dl-get-cpu-features.c
Normal file
27
sysdeps/x86/dl-get-cpu-features.c
Normal file
@ -0,0 +1,27 @@
|
||||
/* This file is part of the GNU C Library.
|
||||
Copyright (C) 2015 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/>. */
|
||||
|
||||
|
||||
#include <ldsodefs.h>
|
||||
|
||||
#undef __get_cpu_features
|
||||
|
||||
const struct cpu_features *
|
||||
__get_cpu_features (void)
|
||||
{
|
||||
return &GLRO(dl_x86_cpu_features);
|
||||
}
|
||||
41
sysdeps/x86/libc-start.c
Normal file
41
sysdeps/x86/libc-start.c
Normal file
@ -0,0 +1,41 @@
|
||||
/* 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/>. */
|
||||
|
||||
#ifdef SHARED
|
||||
# include <csu/libc-start.c>
|
||||
# else
|
||||
/* The main work is done in the generic function. */
|
||||
# define LIBC_START_DISABLE_INLINE
|
||||
# define LIBC_START_MAIN generic_start_main
|
||||
# include <csu/libc-start.c>
|
||||
# include <cpu-features.h>
|
||||
# include <cpu-features.c>
|
||||
|
||||
extern struct cpu_features _dl_x86_cpu_features;
|
||||
|
||||
int
|
||||
__libc_start_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
|
||||
int argc, char **argv,
|
||||
__typeof (main) init,
|
||||
void (*fini) (void),
|
||||
void (*rtld_fini) (void), void *stack_end)
|
||||
{
|
||||
init_cpu_features (&_dl_x86_cpu_features);
|
||||
return generic_start_main (main, argc, argv, init, fini, rtld_fini,
|
||||
stack_end);
|
||||
}
|
||||
#endif
|
||||
7
sysdeps/x86/rtld-global-offsets.sym
Normal file
7
sysdeps/x86/rtld-global-offsets.sym
Normal file
@ -0,0 +1,7 @@
|
||||
#define SHARED 1
|
||||
|
||||
#include <ldsodefs.h>
|
||||
|
||||
#define rtld_global_ro_offsetof(mem) offsetof (struct rtld_global_ro, mem)
|
||||
|
||||
RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET rtld_global_ro_offsetof (_dl_x86_cpu_features)
|
||||
1
sysdeps/x86/tst-get-cpu-features-static.c
Normal file
1
sysdeps/x86/tst-get-cpu-features-static.c
Normal file
@ -0,0 +1 @@
|
||||
#include "tst-get-cpu-features.c"
|
||||
31
sysdeps/x86/tst-get-cpu-features.c
Normal file
31
sysdeps/x86/tst-get-cpu-features.c
Normal file
@ -0,0 +1,31 @@
|
||||
/* Test case for x86 __get_cpu_features interface
|
||||
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/>. */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <cpu-features.h>
|
||||
|
||||
static int
|
||||
do_test (void)
|
||||
{
|
||||
if (__get_cpu_features ()->kind == arch_kind_unknown)
|
||||
abort ();
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define TEST_FUNCTION do_test ()
|
||||
#include "../../test-skeleton.c"
|
||||
@ -21,40 +21,11 @@
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <cpuid.h>
|
||||
#include "multiarch/init-arch.h"
|
||||
|
||||
#ifndef __cpuid_count
|
||||
/* FIXME: Provide __cpuid_count if it isn't defined. Copied from gcc
|
||||
4.4.0. Remove this if gcc 4.4 is the minimum requirement. */
|
||||
# if defined(__i386__) && defined(__PIC__)
|
||||
/* %ebx may be the PIC register. */
|
||||
# define __cpuid_count(level, count, a, b, c, d) \
|
||||
__asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
|
||||
"cpuid\n\t" \
|
||||
"xchg{l}\t{%%}ebx, %1\n\t" \
|
||||
: "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
|
||||
: "0" (level), "2" (count))
|
||||
# else
|
||||
# define __cpuid_count(level, count, a, b, c, d) \
|
||||
__asm__ ("cpuid\n\t" \
|
||||
: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
|
||||
: "0" (level), "2" (count))
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef USE_MULTIARCH
|
||||
# include "multiarch/init-arch.h"
|
||||
|
||||
# define is_intel __cpu_features.kind == arch_kind_intel
|
||||
# define is_amd __cpu_features.kind == arch_kind_amd
|
||||
# define max_cpuid __cpu_features.max_cpuid
|
||||
#else
|
||||
/* This spells out "GenuineIntel". */
|
||||
# define is_intel \
|
||||
ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69
|
||||
/* This spells out "AuthenticAMD". */
|
||||
# define is_amd \
|
||||
ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65
|
||||
#endif
|
||||
#define is_intel GLRO(dl_x86_cpu_features).kind == arch_kind_intel
|
||||
#define is_amd GLRO(dl_x86_cpu_features).kind == arch_kind_amd
|
||||
#define max_cpuid GLRO(dl_x86_cpu_features).max_cpuid
|
||||
|
||||
static const struct intel_02_cache_info
|
||||
{
|
||||
@ -235,21 +206,8 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
|
||||
/* Intel reused this value. For family 15, model 6 it
|
||||
specifies the 3rd level cache. Otherwise the 2nd
|
||||
level cache. */
|
||||
unsigned int family;
|
||||
unsigned int model;
|
||||
#ifdef USE_MULTIARCH
|
||||
family = __cpu_features.family;
|
||||
model = __cpu_features.model;
|
||||
#else
|
||||
unsigned int eax;
|
||||
unsigned int ebx;
|
||||
unsigned int ecx;
|
||||
unsigned int edx;
|
||||
__cpuid (1, eax, ebx, ecx, edx);
|
||||
|
||||
family = ((eax >> 20) & 0xff) + ((eax >> 8) & 0xf);
|
||||
model = (((eax >>16) & 0xf) << 4) + ((eax >> 4) & 0xf);
|
||||
#endif
|
||||
unsigned int family = GLRO(dl_x86_cpu_features).family;
|
||||
unsigned int model = GLRO(dl_x86_cpu_features).model;
|
||||
|
||||
if (family == 15 && model == 6)
|
||||
{
|
||||
@ -476,18 +434,6 @@ long int
|
||||
attribute_hidden
|
||||
__cache_sysconf (int name)
|
||||
{
|
||||
#ifdef USE_MULTIARCH
|
||||
if (__cpu_features.kind == arch_kind_unknown)
|
||||
__init_cpu_features ();
|
||||
#else
|
||||
/* Find out what brand of processor. */
|
||||
unsigned int max_cpuid;
|
||||
unsigned int ebx;
|
||||
unsigned int ecx;
|
||||
unsigned int edx;
|
||||
__cpuid (0, max_cpuid, ebx, ecx, edx);
|
||||
#endif
|
||||
|
||||
if (is_intel)
|
||||
return handle_intel (name, max_cpuid);
|
||||
|
||||
@ -523,18 +469,6 @@ long int __x86_raw_shared_cache_size attribute_hidden = 1024 * 1024;
|
||||
int __x86_prefetchw attribute_hidden;
|
||||
#endif
|
||||
|
||||
#ifndef DISABLE_PREFERRED_MEMORY_INSTRUCTION
|
||||
/* Instructions preferred for memory and string routines.
|
||||
|
||||
0: Regular instructions
|
||||
1: MMX instructions
|
||||
2: SSE2 instructions
|
||||
3: SSSE3 instructions
|
||||
|
||||
*/
|
||||
int __x86_preferred_memory_instruction attribute_hidden;
|
||||
#endif
|
||||
|
||||
|
||||
static void
|
||||
__attribute__((constructor))
|
||||
@ -551,14 +485,6 @@ init_cacheinfo (void)
|
||||
unsigned int level;
|
||||
unsigned int threads = 0;
|
||||
|
||||
#ifdef USE_MULTIARCH
|
||||
if (__cpu_features.kind == arch_kind_unknown)
|
||||
__init_cpu_features ();
|
||||
#else
|
||||
int max_cpuid;
|
||||
__cpuid (0, max_cpuid, ebx, ecx, edx);
|
||||
#endif
|
||||
|
||||
if (is_intel)
|
||||
{
|
||||
data = handle_intel (_SC_LEVEL1_DCACHE_SIZE, max_cpuid);
|
||||
@ -574,34 +500,13 @@ init_cacheinfo (void)
|
||||
shared = handle_intel (_SC_LEVEL2_CACHE_SIZE, max_cpuid);
|
||||
}
|
||||
|
||||
unsigned int ebx_1;
|
||||
|
||||
#ifdef USE_MULTIARCH
|
||||
eax = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].eax;
|
||||
ebx_1 = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ebx;
|
||||
ecx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx;
|
||||
edx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].edx;
|
||||
#else
|
||||
__cpuid (1, eax, ebx_1, ecx, edx);
|
||||
#endif
|
||||
|
||||
unsigned int family = (eax >> 8) & 0x0f;
|
||||
unsigned int model = (eax >> 4) & 0x0f;
|
||||
unsigned int extended_model = (eax >> 12) & 0xf0;
|
||||
|
||||
#ifndef DISABLE_PREFERRED_MEMORY_INSTRUCTION
|
||||
/* Intel prefers SSSE3 instructions for memory/string routines
|
||||
if they are available. */
|
||||
if ((ecx & 0x200))
|
||||
__x86_preferred_memory_instruction = 3;
|
||||
else
|
||||
__x86_preferred_memory_instruction = 2;
|
||||
#endif
|
||||
|
||||
/* Figure out the number of logical threads that share the
|
||||
highest cache level. */
|
||||
if (max_cpuid >= 4)
|
||||
{
|
||||
unsigned int family = GLRO(dl_x86_cpu_features).family;
|
||||
unsigned int model = GLRO(dl_x86_cpu_features).model;
|
||||
|
||||
int i = 0;
|
||||
|
||||
/* Query until desired cache level is enumerated. */
|
||||
@ -653,7 +558,6 @@ init_cacheinfo (void)
|
||||
threads += 1;
|
||||
if (threads > 2 && level == 2 && family == 6)
|
||||
{
|
||||
model += extended_model;
|
||||
switch (model)
|
||||
{
|
||||
case 0x57:
|
||||
@ -676,7 +580,9 @@ init_cacheinfo (void)
|
||||
intel_bug_no_cache_info:
|
||||
/* Assume that all logical threads share the highest cache level. */
|
||||
|
||||
threads = (ebx_1 >> 16) & 0xff;
|
||||
threads
|
||||
= ((GLRO(dl_x86_cpu_features).cpuid[COMMON_CPUID_INDEX_1].ebx
|
||||
>> 16) & 0xff);
|
||||
}
|
||||
|
||||
/* Cap usage of highest cache level to the number of supported
|
||||
@ -691,25 +597,6 @@ init_cacheinfo (void)
|
||||
long int core = handle_amd (_SC_LEVEL2_CACHE_SIZE);
|
||||
shared = handle_amd (_SC_LEVEL3_CACHE_SIZE);
|
||||
|
||||
#ifndef DISABLE_PREFERRED_MEMORY_INSTRUCTION
|
||||
# ifdef USE_MULTIARCH
|
||||
eax = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].eax;
|
||||
ebx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ebx;
|
||||
ecx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx;
|
||||
edx = __cpu_features.cpuid[COMMON_CPUID_INDEX_1].edx;
|
||||
# else
|
||||
__cpuid (1, eax, ebx, ecx, edx);
|
||||
# endif
|
||||
|
||||
/* AMD prefers SSSE3 instructions for memory/string routines
|
||||
if they are avaiable, otherwise it prefers integer
|
||||
instructions. */
|
||||
if ((ecx & 0x200))
|
||||
__x86_preferred_memory_instruction = 3;
|
||||
else
|
||||
__x86_preferred_memory_instruction = 0;
|
||||
#endif
|
||||
|
||||
/* Get maximum extended function. */
|
||||
__cpuid (0x80000000, max_cpuid_ex, ebx, ecx, edx);
|
||||
|
||||
|
||||
@ -26,6 +26,7 @@
|
||||
#include <sysdep.h>
|
||||
#include <tls.h>
|
||||
#include <dl-tlsdesc.h>
|
||||
#include <cpu-features.c>
|
||||
|
||||
/* Return nonzero iff ELF header is compatible with the running host. */
|
||||
static inline int __attribute__ ((unused))
|
||||
@ -205,6 +206,8 @@ dl_platform_init (void)
|
||||
if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
|
||||
/* Avoid an empty string which would disturb us. */
|
||||
GLRO(dl_platform) = NULL;
|
||||
|
||||
init_cpu_features (&GLRO(dl_x86_cpu_features));
|
||||
}
|
||||
|
||||
static inline ElfW(Addr)
|
||||
|
||||
57
sysdeps/x86_64/dl-procinfo.c
Normal file
57
sysdeps/x86_64/dl-procinfo.c
Normal file
@ -0,0 +1,57 @@
|
||||
/* Data for x86-64 version of processor capability information.
|
||||
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/>. */
|
||||
|
||||
/* If anything should be added here check whether the size of each string
|
||||
is still ok with the given array size.
|
||||
|
||||
All the #ifdefs in the definitions are quite irritating but
|
||||
necessary if we want to avoid duplicating the information. There
|
||||
are three different modes:
|
||||
|
||||
- PROCINFO_DECL is defined. This means we are only interested in
|
||||
declarations.
|
||||
|
||||
- PROCINFO_DECL is not defined:
|
||||
|
||||
+ if SHARED is defined the file is included in an array
|
||||
initializer. The .element = { ... } syntax is needed.
|
||||
|
||||
+ if SHARED is not defined a normal array initialization is
|
||||
needed.
|
||||
*/
|
||||
|
||||
#ifndef PROCINFO_CLASS
|
||||
# define PROCINFO_CLASS
|
||||
#endif
|
||||
|
||||
#if !defined PROCINFO_DECL && defined SHARED
|
||||
._dl_x86_cpu_features
|
||||
#else
|
||||
PROCINFO_CLASS struct cpu_features _dl_x86_cpu_features
|
||||
#endif
|
||||
#ifndef PROCINFO_DECL
|
||||
= { }
|
||||
#endif
|
||||
#if !defined SHARED || defined PROCINFO_DECL
|
||||
;
|
||||
#else
|
||||
,
|
||||
#endif
|
||||
|
||||
#undef PROCINFO_DECL
|
||||
#undef PROCINFO_CLASS
|
||||
@ -20,6 +20,7 @@
|
||||
#define _X86_64_LDSODEFS_H 1
|
||||
|
||||
#include <elf.h>
|
||||
#include <cpu-features.h>
|
||||
|
||||
struct La_x86_64_regs;
|
||||
struct La_x86_64_retval;
|
||||
|
||||
@ -1,5 +1,4 @@
|
||||
ifeq ($(subdir),csu)
|
||||
aux += init-arch
|
||||
tests += test-multiarch
|
||||
gen-as-const-headers += ifunc-defines.sym
|
||||
endif
|
||||
|
||||
@ -1,5 +0,0 @@
|
||||
libc {
|
||||
GLIBC_PRIVATE {
|
||||
__get_cpu_features;
|
||||
}
|
||||
}
|
||||
@ -1,2 +0,0 @@
|
||||
#define DISABLE_PREFERRED_MEMORY_INSTRUCTION
|
||||
#include "../cacheinfo.c"
|
||||
@ -4,7 +4,6 @@
|
||||
--
|
||||
|
||||
CPU_FEATURES_SIZE sizeof (struct cpu_features)
|
||||
KIND_OFFSET offsetof (struct cpu_features, kind)
|
||||
CPUID_OFFSET offsetof (struct cpu_features, cpuid)
|
||||
CPUID_SIZE sizeof (struct cpuid_registers)
|
||||
CPUID_EAX_OFFSET offsetof (struct cpuid_registers, eax)
|
||||
|
||||
@ -15,192 +15,8 @@
|
||||
License along with the GNU C Library; if not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#define bit_Fast_Rep_String (1 << 0)
|
||||
#define bit_Fast_Copy_Backward (1 << 1)
|
||||
#define bit_Slow_BSF (1 << 2)
|
||||
#define bit_Fast_Unaligned_Load (1 << 4)
|
||||
#define bit_Prefer_PMINUB_for_stringop (1 << 5)
|
||||
#define bit_AVX_Usable (1 << 6)
|
||||
#define bit_FMA_Usable (1 << 7)
|
||||
#define bit_FMA4_Usable (1 << 8)
|
||||
#define bit_Slow_SSE4_2 (1 << 9)
|
||||
#define bit_AVX2_Usable (1 << 10)
|
||||
#define bit_AVX_Fast_Unaligned_Load (1 << 11)
|
||||
#define bit_AVX512F_Usable (1 << 12)
|
||||
#define bit_AVX512DQ_Usable (1 << 13)
|
||||
|
||||
/* CPUID Feature flags. */
|
||||
|
||||
/* COMMON_CPUID_INDEX_1. */
|
||||
#define bit_SSE2 (1 << 26)
|
||||
#define bit_SSSE3 (1 << 9)
|
||||
#define bit_SSE4_1 (1 << 19)
|
||||
#define bit_SSE4_2 (1 << 20)
|
||||
#define bit_OSXSAVE (1 << 27)
|
||||
#define bit_AVX (1 << 28)
|
||||
#define bit_POPCOUNT (1 << 23)
|
||||
#define bit_FMA (1 << 12)
|
||||
#define bit_FMA4 (1 << 16)
|
||||
|
||||
/* COMMON_CPUID_INDEX_7. */
|
||||
#define bit_RTM (1 << 11)
|
||||
#define bit_AVX2 (1 << 5)
|
||||
#define bit_AVX512F (1 << 16)
|
||||
#define bit_AVX512DQ (1 << 17)
|
||||
|
||||
/* XCR0 Feature flags. */
|
||||
#define bit_XMM_state (1 << 1)
|
||||
#define bit_YMM_state (2 << 1)
|
||||
#define bit_Opmask_state (1 << 5)
|
||||
#define bit_ZMM0_15_state (1 << 6)
|
||||
#define bit_ZMM16_31_state (1 << 7)
|
||||
|
||||
/* The integer bit array index for the first set of internal feature bits. */
|
||||
# define FEATURE_INDEX_1 0
|
||||
|
||||
/* The current maximum size of the feature integer bit array. */
|
||||
# define FEATURE_INDEX_MAX 1
|
||||
|
||||
#ifdef __ASSEMBLER__
|
||||
|
||||
# include <ifunc-defines.h>
|
||||
|
||||
# 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
|
||||
# define index_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
||||
# define index_AVX COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
||||
# define index_AVX2 COMMON_CPUID_INDEX_7*CPUID_SIZE+CPUID_EBX_OFFSET
|
||||
|
||||
# define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Slow_BSF FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Fast_Unaligned_Load FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Prefer_PMINUB_for_stringop FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_AVX_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_FMA_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_FMA4_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_Slow_SSE4_2 FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# define index_AVX2_Usable FEATURE_INDEX_1*FEATURE_SIZE
|
||||
# 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
|
||||
|
||||
#else /* __ASSEMBLER__ */
|
||||
|
||||
# include <sys/param.h>
|
||||
|
||||
enum
|
||||
{
|
||||
COMMON_CPUID_INDEX_1 = 0,
|
||||
COMMON_CPUID_INDEX_7,
|
||||
COMMON_CPUID_INDEX_80000001, /* for AMD */
|
||||
/* Keep the following line at the end. */
|
||||
COMMON_CPUID_INDEX_MAX
|
||||
};
|
||||
|
||||
extern struct cpu_features
|
||||
{
|
||||
enum cpu_features_kind
|
||||
{
|
||||
arch_kind_unknown = 0,
|
||||
arch_kind_intel,
|
||||
arch_kind_amd,
|
||||
arch_kind_other
|
||||
} kind;
|
||||
int max_cpuid;
|
||||
struct cpuid_registers
|
||||
{
|
||||
unsigned int eax;
|
||||
unsigned int ebx;
|
||||
unsigned int ecx;
|
||||
unsigned int edx;
|
||||
} cpuid[COMMON_CPUID_INDEX_MAX];
|
||||
unsigned int family;
|
||||
unsigned int model;
|
||||
unsigned int feature[FEATURE_INDEX_MAX];
|
||||
} __cpu_features attribute_hidden;
|
||||
|
||||
|
||||
extern void __init_cpu_features (void) attribute_hidden;
|
||||
# define INIT_ARCH() \
|
||||
do \
|
||||
if (__cpu_features.kind == arch_kind_unknown) \
|
||||
__init_cpu_features (); \
|
||||
while (0)
|
||||
|
||||
/* Used from outside libc.so to get access to the CPU features structure. */
|
||||
extern const struct cpu_features *__get_cpu_features (void)
|
||||
__attribute__ ((const));
|
||||
|
||||
# if IS_IN (libc)
|
||||
# define __get_cpu_features() (&__cpu_features)
|
||||
# endif
|
||||
|
||||
# define HAS_CPU_FEATURE(idx, reg, bit) \
|
||||
((__get_cpu_features ()->cpuid[idx].reg & (bit)) != 0)
|
||||
|
||||
/* Following are the feature tests used throughout libc. */
|
||||
|
||||
/* CPUID_* evaluates to true if the feature flag is enabled.
|
||||
We always use &__cpu_features because the HAS_CPUID_* macros
|
||||
are called only within __init_cpu_features, where we can't
|
||||
call __get_cpu_features without infinite recursion. */
|
||||
# define HAS_CPUID_FLAG(idx, reg, bit) \
|
||||
(((&__cpu_features)->cpuid[idx].reg & (bit)) != 0)
|
||||
|
||||
# define CPUID_OSXSAVE \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_1, ecx, bit_OSXSAVE)
|
||||
# define CPUID_AVX \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_1, ecx, bit_AVX)
|
||||
# define CPUID_FMA \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_1, ecx, bit_FMA)
|
||||
# define CPUID_FMA4 \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_80000001, ecx, bit_FMA4)
|
||||
# define CPUID_RTM \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_7, ebx, bit_RTM)
|
||||
# define CPUID_AVX2 \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_7, ebx, bit_AVX2)
|
||||
# define CPUID_AVX512F \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_7, ebx, bit_AVX512F)
|
||||
# define CPUID_AVX512DQ \
|
||||
HAS_CPUID_FLAG (COMMON_CPUID_INDEX_7, ebx, bit_AVX512DQ)
|
||||
|
||||
/* HAS_* evaluates to true if we may use the feature at runtime. */
|
||||
# define HAS_SSE2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, edx, bit_SSE2)
|
||||
# define HAS_POPCOUNT HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_POPCOUNT)
|
||||
# define HAS_SSSE3 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSSE3)
|
||||
# define HAS_SSE4_1 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSE4_1)
|
||||
# define HAS_SSE4_2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSE4_2)
|
||||
# define HAS_RTM HAS_CPU_FEATURE (COMMON_CPUID_INDEX_7, ebx, bit_RTM)
|
||||
|
||||
# define index_Fast_Rep_String FEATURE_INDEX_1
|
||||
# define index_Fast_Copy_Backward FEATURE_INDEX_1
|
||||
# define index_Slow_BSF FEATURE_INDEX_1
|
||||
# define index_Fast_Unaligned_Load FEATURE_INDEX_1
|
||||
# define index_Prefer_PMINUB_for_stringop FEATURE_INDEX_1
|
||||
# define index_AVX_Usable FEATURE_INDEX_1
|
||||
# define index_FMA_Usable FEATURE_INDEX_1
|
||||
# define index_FMA4_Usable FEATURE_INDEX_1
|
||||
# define index_Slow_SSE4_2 FEATURE_INDEX_1
|
||||
# define index_AVX2_Usable FEATURE_INDEX_1
|
||||
# define index_AVX_Fast_Unaligned_Load FEATURE_INDEX_1
|
||||
# define index_AVX512F_Usable FEATURE_INDEX_1
|
||||
# define index_AVX512DQ_Usable FEATURE_INDEX_1
|
||||
|
||||
# define HAS_ARCH_FEATURE(name) \
|
||||
((__get_cpu_features ()->feature[index_##name] & (bit_##name)) != 0)
|
||||
|
||||
# define HAS_FAST_REP_STRING HAS_ARCH_FEATURE (Fast_Rep_String)
|
||||
# define HAS_FAST_COPY_BACKWARD HAS_ARCH_FEATURE (Fast_Copy_Backward)
|
||||
# define HAS_SLOW_BSF HAS_ARCH_FEATURE (Slow_BSF)
|
||||
# define HAS_FAST_UNALIGNED_LOAD HAS_ARCH_FEATURE (Fast_Unaligned_Load)
|
||||
# define HAS_AVX HAS_ARCH_FEATURE (AVX_Usable)
|
||||
# define HAS_AVX2 HAS_ARCH_FEATURE (AVX2_Usable)
|
||||
# define HAS_AVX512F HAS_ARCH_FEATURE (AVX512F_Usable)
|
||||
# define HAS_AVX512DQ HAS_ARCH_FEATURE (AVX512DQ_Usable)
|
||||
# define HAS_FMA HAS_ARCH_FEATURE (FMA_Usable)
|
||||
# define HAS_FMA4 HAS_ARCH_FEATURE (FMA4_Usable)
|
||||
# define HAS_AVX_FAST_UNALIGNED_LOAD HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
|
||||
|
||||
#endif /* __ASSEMBLER__ */
|
||||
#ifdef __ASSEMBLER__
|
||||
# include <cpu-features.h>
|
||||
#else
|
||||
# include <ldsodefs.h>
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user