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https://sourceware.org/git/glibc.git
synced 2024-09-22 01:14:01 +00:00
5a414ff70c
Added support for TX lock elision of pthread mutexes on s390 and s390x. This may improve lock scaling of existing programs on TX capable systems. The lock elision code is only built with --enable-lock-elision=yes and then requires a GCC version supporting the TX builtins. With lock elision default mutexes are elided via __builtin_tbegin, if the cpu supports transactions. By default lock elision is not enabled and the elision code is not built.
109 lines
3.2 KiB
Plaintext
109 lines
3.2 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/s390.
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$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
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for ac_prog in $AS
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_prog_AS+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -n "$AS"; then
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ac_cv_prog_AS="$AS" # Let the user override the test.
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else
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
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ac_cv_prog_AS="$ac_prog"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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fi
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fi
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AS=$ac_cv_prog_AS
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if test -n "$AS"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
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$as_echo "$AS" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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test -n "$AS" && break
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done
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if test -z "$AS"; then
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ac_verc_fail=yes
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else
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# Found it, now check the version.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AS" >&5
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$as_echo_n "checking version of $AS... " >&6; }
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ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
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case $ac_prog_version in
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'') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
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2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
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ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
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*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
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esac
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
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$as_echo "$ac_prog_version" >&6; }
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fi
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if test $ac_verc_fail = yes; then
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critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390."
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_tbegin" >&5
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$as_echo_n "checking for __builtin_tbegin... " >&6; }
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if ${libc_cv_gcc_builtin_tbegin+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<\EOF
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#include <htmintrin.h>
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void testtransaction ()
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{
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if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
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{
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__builtin_tend ();
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}
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}
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EOF
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if { ac_try='${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null'
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{ { eval echo "\"\$as_me\":${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; }; } ;
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then
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libc_cv_gcc_builtin_tbegin=yes
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else
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libc_cv_gcc_builtin_tbegin=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_builtin_tbegin" >&5
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$as_echo "$libc_cv_gcc_builtin_tbegin" >&6; }
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if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
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critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
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fi
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test -n "$critic_missing" && as_fn_error $? "
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*** $critic_missing" "$LINENO" 5
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