glibc/sysdeps/s390/configure
Stefan Liebler 4f0a1cea34 S390: configure check for vector instruction support in assembler.
The S390 specific test checks if the assembler has support for the new z13
vector instructions by compiling a vector instruction. The .machine and
.machinemode directives are needed to compile the vector instruction without
-march=z13 option on 31/64 bit.
On success the macro HAVE_S390_VX_ASM_SUPPORT is defined. This macro is used
to determine if the optimized functions can be build without compile errors.
If the used assembler lacks vector support, then a warning is dumped while
configuring and only the common code functions are build.

The z13 instruction support was introduced in
"[Committed] S/390: Add support for IBM z13."
(https://sourceware.org/ml/binutils/2015-01/msg00197.html)

ChangeLog:

	* config.h.in (HAVE_S390_VX_ASM_SUPPORT): New macro undefine.
	* sysdeps/s390/configure.ac: Add test for S390 vector instruction
	assembler support.
	* sysdeps/s390/configure: Regenerated.
2015-08-26 10:26:19 +02:00

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# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/s390.
$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
for ac_prog in $AS
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if ${ac_cv_prog_AS+:} false; then :
$as_echo_n "(cached) " >&6
else
if test -n "$AS"; then
ac_cv_prog_AS="$AS" # Let the user override the test.
else
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_prog_AS="$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
IFS=$as_save_IFS
fi
fi
AS=$ac_cv_prog_AS
if test -n "$AS"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
$as_echo "$AS" >&6; }
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
test -n "$AS" && break
done
if test -z "$AS"; then
ac_verc_fail=yes
else
# Found it, now check the version.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AS" >&5
$as_echo_n "checking version of $AS... " >&6; }
ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
case $ac_prog_version in
'') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
esac
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
$as_echo "$ac_prog_version" >&6; }
fi
if test $ac_verc_fail = yes; then
critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390."
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_tbegin" >&5
$as_echo_n "checking for __builtin_tbegin... " >&6; }
if ${libc_cv_gcc_builtin_tbegin+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<\EOF
#include <htmintrin.h>
void testtransaction ()
{
if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
{
__builtin_tend ();
}
}
EOF
if { ac_try='${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } ;
then
libc_cv_gcc_builtin_tbegin=yes
else
libc_cv_gcc_builtin_tbegin=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_builtin_tbegin" >&5
$as_echo "$libc_cv_gcc_builtin_tbegin" >&6; }
if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 vector instruction support" >&5
$as_echo_n "checking for S390 vector instruction support... " >&6; }
if ${libc_cv_asm_s390_vx+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<\EOF
void testvecinsn ()
{
__asm__ (".machine \"z13\" \n\t"
".machinemode \"zarch_nohighgprs\" \n\t"
"vistrbs %%v16,%%v17 \n\t"
"locghie %%r1,0" : :);
}
EOF
if { ac_try='${CC-cc} --shared conftest.c -o conftest.o &> /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } ;
then
libc_cv_asm_s390_vx=yes
else
libc_cv_asm_s390_vx=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_vx" >&5
$as_echo "$libc_cv_asm_s390_vx" >&6; }
if test "$libc_cv_asm_s390_vx" = yes ;
then
$as_echo "#define HAVE_S390_VX_ASM_SUPPORT 1" >>confdefs.h
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Use binutils with vector-support in order to use optimized implementations." >&5
$as_echo "$as_me: WARNING: Use binutils with vector-support in order to use optimized implementations." >&2;}
fi
test -n "$critic_missing" && as_fn_error $? "
*** $critic_missing" "$LINENO" 5