Remove -mavx2 configure tests.
There are configure tests for the -mavx2 compiler option. AVX2 support was added in GCC 4.7, so these tests are now obsolete; this patch removes them. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * sysdeps/i386/configure.ac (libc_cv_cc_avx2): Remove configure test. * sysdeps/i386/configure: Regenerated. * sysdeps/x86_64/configure.ac (libc_cv_cc_avx2): Remove configure test. * sysdeps/x86_64/configure: Regenerated. * config.h.in (HAVE_AVX2_SUPPORT): Remove #undef. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memset-avx2 unconditionally instead of conditionally on [$(config-cflags-avx2) = yes]. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list) [HAVE_AVX2_SUPPORT]: Make code unconditional. * sysdeps/x86_64/multiarch/memset.S [HAVE_AVX2_SUPPORT]: Likewise. * sysdeps/x86_64/multiarch/memset_chk.S [IS_IN (libc) && SHARED && HAVE_AVX2_SUPPORT]: Change conditional to [IS_IN (libc) && SHARED].
This commit is contained in:
Joseph Myers
parent
56583289b1
commit
c871b9b096
20
ChangeLog
20
ChangeLog
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@ -1,3 +1,23 @@
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2015-10-28 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/i386/configure.ac (libc_cv_cc_avx2): Remove configure
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test.
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* sysdeps/i386/configure: Regenerated.
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* sysdeps/x86_64/configure.ac (libc_cv_cc_avx2): Remove configure
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test.
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* sysdeps/x86_64/configure: Regenerated.
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* config.h.in (HAVE_AVX2_SUPPORT): Remove #undef.
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* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
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memset-avx2 unconditionally instead of conditionally on
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[$(config-cflags-avx2) = yes].
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* sysdeps/x86_64/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list) [HAVE_AVX2_SUPPORT]: Make code
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unconditional.
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* sysdeps/x86_64/multiarch/memset.S [HAVE_AVX2_SUPPORT]: Likewise.
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* sysdeps/x86_64/multiarch/memset_chk.S
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[IS_IN (libc) && SHARED && HAVE_AVX2_SUPPORT]: Change conditional
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to [IS_IN (libc) && SHARED].
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2015-10-27 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/arm/configure.ac (libc_cv_arm_tls_desc): Remove
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@ -71,9 +71,6 @@
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/* Define if assembler supports Intel MPX. */
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#undef HAVE_MPX_SUPPORT
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/* Define if gcc supports AVX2. */
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#undef HAVE_AVX2_SUPPORT
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/* Define if the compiler\'s exception support is based on libunwind. */
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#undef HAVE_CC_WITH_LIBUNWIND
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@ -119,32 +119,6 @@ if test $libc_cv_asm_mpx == yes; then
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX2 support" >&5
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$as_echo_n "checking for AVX2 support... " >&6; }
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if ${libc_cv_cc_avx2+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if { ac_try='${CC-cc} -mavx2 -xc /dev/null -S -o /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then :
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libc_cv_cc_avx2=yes
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else
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libc_cv_cc_avx2=no
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx2" >&5
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$as_echo "$libc_cv_cc_avx2" >&6; }
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if test $libc_cv_cc_avx2 = yes; then
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$as_echo "#define HAVE_AVX2_SUPPORT 1" >>confdefs.h
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fi
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config_vars="$config_vars
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config-cflags-avx2 = $libc_cv_cc_avx2"
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$as_echo "#define USE_REGPARMS 1" >>confdefs.h
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@ -49,15 +49,6 @@ if test $libc_cv_asm_mpx == yes; then
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AC_DEFINE(HAVE_MPX_SUPPORT)
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fi
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dnl Check if -mavx2 works.
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AC_CACHE_CHECK(for AVX2 support, libc_cv_cc_avx2, [dnl
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LIBC_TRY_CC_OPTION([-mavx2], [libc_cv_cc_avx2=yes], [libc_cv_cc_avx2=no])
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])
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if test $libc_cv_cc_avx2 = yes; then
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AC_DEFINE(HAVE_AVX2_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-avx2], [$libc_cv_cc_avx2])
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AC_DEFINE(USE_REGPARMS)
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dnl It is always possible to access static and hidden symbols in an
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@ -124,32 +124,6 @@ if test $libc_cv_asm_mpx == yes; then
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX2 support" >&5
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$as_echo_n "checking for AVX2 support... " >&6; }
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if ${libc_cv_cc_avx2+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if { ac_try='${CC-cc} -mavx2 -xc /dev/null -S -o /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then :
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libc_cv_cc_avx2=yes
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else
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libc_cv_cc_avx2=no
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx2" >&5
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$as_echo "$libc_cv_cc_avx2" >&6; }
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if test $libc_cv_cc_avx2 = yes; then
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$as_echo "#define HAVE_AVX2_SUPPORT 1" >>confdefs.h
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fi
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config_vars="$config_vars
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config-cflags-avx2 = $libc_cv_cc_avx2"
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if test x"$build_mathvec" = xnotset; then
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build_mathvec=yes
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fi
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@ -45,15 +45,6 @@ if test $libc_cv_asm_mpx == yes; then
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AC_DEFINE(HAVE_MPX_SUPPORT)
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fi
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dnl Check if -mavx2 works.
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AC_CACHE_CHECK(for AVX2 support, libc_cv_cc_avx2, [dnl
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LIBC_TRY_CC_OPTION([-mavx2], [libc_cv_cc_avx2=yes], [libc_cv_cc_avx2=no])
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])
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if test $libc_cv_cc_avx2 = yes; then
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AC_DEFINE(HAVE_AVX2_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-avx2], [$libc_cv_cc_avx2])
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if test x"$build_mathvec" = xnotset; then
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build_mathvec=yes
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fi
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@ -18,15 +18,11 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \
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stpcpy-sse2-unaligned stpncpy-sse2-unaligned \
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strcat-sse2-unaligned strncat-sse2-unaligned \
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strchr-sse2-no-bsf memcmp-ssse3 strstr-sse2-unaligned \
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strcspn-c strpbrk-c strspn-c varshift
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strcspn-c strpbrk-c strspn-c varshift memset-avx2
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CFLAGS-varshift.c += -msse4
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CFLAGS-strcspn-c.c += -msse4
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CFLAGS-strpbrk-c.c += -msse4
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CFLAGS-strspn-c.c += -msse4
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ifeq (yes,$(config-cflags-avx2))
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sysdep_routines += memset-avx2
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endif
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endif
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ifeq ($(subdir),wcsmbs)
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@ -70,7 +70,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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__memmove_ssse3)
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IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_sse2))
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#ifdef HAVE_AVX2_SUPPORT
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/* Support sysdeps/x86_64/multiarch/memset_chk.S. */
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IFUNC_IMPL (i, name, __memset_chk,
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IFUNC_IMPL_ADD (array, i, __memset_chk, 1,
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@ -85,7 +84,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_IMPL_ADD (array, i, memset,
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HAS_ARCH_FEATURE (AVX2_Usable),
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__memset_avx2))
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#endif
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/* Support sysdeps/x86_64/multiarch/stpncpy.S. */
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IFUNC_IMPL (i, name, stpncpy,
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@ -17,13 +17,12 @@
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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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#ifdef HAVE_AVX2_SUPPORT
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <init-arch.h>
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/* Define multiple versions only for the definition in lib. */
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# if IS_IN (libc)
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#if IS_IN (libc)
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ENTRY(memset)
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.type memset, @gnu_indirect_function
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LOAD_RTLD_GLOBAL_RO_RDX
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leaq __memset_avx2(%rip), %rax
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2: ret
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END(memset)
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# endif
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#endif
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# if IS_IN (libc)
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# undef memset
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# define memset __memset_sse2
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#if IS_IN (libc)
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# undef memset
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# define memset __memset_sse2
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# undef __memset_chk
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# define __memset_chk __memset_chk_sse2
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# undef __memset_chk
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# define __memset_chk __memset_chk_sse2
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# ifdef SHARED
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# undef libc_hidden_builtin_def
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# ifdef SHARED
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal memset calls through a PLT.
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The speedup we get from using GPR instruction is likely eaten away
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by the indirect call in the PLT. */
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# define libc_hidden_builtin_def(name) \
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# define libc_hidden_builtin_def(name) \
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.globl __GI_memset; __GI_memset = __memset_sse2
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# endif
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# undef strong_alias
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# define strong_alias(original, alias)
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# endif
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# undef strong_alias
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# define strong_alias(original, alias)
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#endif
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#include "../memset.S"
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/* Define multiple versions only for the definition in lib. */
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#if IS_IN (libc)
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# if defined SHARED && defined HAVE_AVX2_SUPPORT
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# ifdef SHARED
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ENTRY(__memset_chk)
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.type __memset_chk, @gnu_indirect_function
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LOAD_RTLD_GLOBAL_RO_RDX
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