mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-02-05 12:40:55 +08:00
Code Issues Packages Projects Releases Wiki Activity

x86: Remove assembly versions of HAS_CPU_FEATURE/HAS_ARCH_FEATURE

Browse Source 
Since all x86 IFUNC selectors are implemented in C, assembly versions of
HAS_CPU_FEATURE and HAS_ARCH_FEATURE can be removed.

	* sysdeps/x86/cpu-features.h [__ASSEMBLER__]
	(LOAD_RTLD_GLOBAL_RO_RDX, HAS_FEATURE, LOAD_FUNC_GOT_EAX,
	HAS_CPU_FEATURE, HAS_ARCH_FEATURE): Removed.
This commit is contained in:
H.J. Lu 2017-08-04 13:38:05 -07:00
parent 973da22a35
commit 64d4dea6cd
2 changed files with 6 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ChangeLog
View File

@ -1,3 +1,9 @@
2017-08-04 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86/cpu-features.h [__ASSEMBLER__]
(LOAD_RTLD_GLOBAL_RO_RDX, HAS_FEATURE, LOAD_FUNC_GOT_EAX,
HAS_CPU_FEATURE, HAS_ARCH_FEATURE): Removed.
2017-08-04 H.J. Lu <hongjiu.lu@intel.com> 2017-08-04 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add * sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add

57
sysdeps/x86/cpu-features.h
View File

@ -127,63 +127,6 @@
# define index_arch_Use_dl_runtime_resolve_slow FEATURE_INDEX_1*FEATURE_SIZE # define index_arch_Use_dl_runtime_resolve_slow FEATURE_INDEX_1*FEATURE_SIZE
# define index_arch_Prefer_No_AVX512 FEATURE_INDEX_1*FEATURE_SIZE # define index_arch_Prefer_No_AVX512 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, field, name) \
testl $(bit_##field##_##name), \
_rtld_local_ro+offset+(index_##field##_##name)(%rip)
# else
# define LOAD_RTLD_GLOBAL_RO_RDX \
mov _rtld_global_ro@GOTPCREL(%rip), %RDX_LP
# define HAS_FEATURE(offset, field, name) \
testl $(bit_##field##_##name), \
RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+offset+(index_##field##_##name)(%rdx)
# endif
# else /* SHARED */
# define LOAD_RTLD_GLOBAL_RO_RDX
# define HAS_FEATURE(offset, field, name) \
testl $(bit_##field##_##name), \
_dl_x86_cpu_features+offset+(index_##field##_##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, field, name) \
testl $(bit_##field##_##name), \
offset+(index_##field##_##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, field, name) \
testl $(bit_##field##_##name), \
RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+offset+(index_##field##_##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, field, name) \
testl $(bit_##field##_##name), \
_dl_x86_cpu_features+offset+(index_##field##_##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, cpu, name)
# define HAS_ARCH_FEATURE(name) HAS_FEATURE (FEATURE_OFFSET, arch, name)
#else /* __ASSEMBLER__ */ #else /* __ASSEMBLER__ */
enum enum