GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.

# Local configure fragment for sysdeps/s390.

dnl It is always possible to access static and hidden symbols in an

dnl position independent way.

AC_DEFINE(PI_STATIC_AND_HIDDEN)

AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl

cat > conftest.c <<\EOF

#include <htmintrin.h>

void testtransaction ()

{

  if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)

    {

      __builtin_tend ();

    }

}

EOF

dnl

dnl test, if the tbegin instruction is used by __builtin_tbegin

if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ;

then

  libc_cv_gcc_builtin_tbegin=yes

else

  libc_cv_gcc_builtin_tbegin=no

fi

rm -f conftest* ])

if 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

AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl

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

dnl

dnl test, if assembler supports S390 vector instructions

if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;

then

  libc_cv_asm_s390_vx=yes

else

  libc_cv_asm_s390_vx=no

fi

rm -f conftest* ])

if test "$libc_cv_asm_s390_vx" = yes ;

then

  AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)

else

  AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])

fi

AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl

cat > conftest.c <<\EOF

void testvecclobber ()

{

  __asm__ ("" : : : "v16");

}

EOF

dnl

dnl test, if gcc supports S390 vector registers as clobber in inline assembly

if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;

then

  libc_cv_gcc_s390_vx=yes

else

  libc_cv_gcc_s390_vx=no

fi

rm -f conftest* ])

if test "$libc_cv_gcc_s390_vx" = yes ;

then

  AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)

fi

AC_CACHE_CHECK(for S390 z10 zarch instruction support as default,

	       libc_cv_asm_s390_min_z10_zarch, [dnl

cat > conftest.c <<\EOF

void testinsn (void *a, void *b, int n)

{

    __asm__ ("exrl %2,1f \n\t"

	     "j 2f \n\t"

	     "1: mvc 0(1,%0),0(%1) \n\t"

	     "2:"

	     : : "a" (a), "a" (b), "d" (n)

	     : "memory", "cc");

}

EOF

dnl

dnl test, if assembler supports S390 z10 zarch instructions as default

if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c

			-o conftest.o &> /dev/null]) ;

then

  libc_cv_asm_s390_min_z10_zarch=yes

else

  libc_cv_asm_s390_min_z10_zarch=no

fi

rm -f conftest* ])

if test "$libc_cv_asm_s390_min_z10_zarch" = yes ;

then

  AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT)

fi

AC_CACHE_CHECK(for S390 z196 zarch instruction support as default,

	       libc_cv_asm_s390_min_z196_zarch, [dnl

cat > conftest.c <<\EOF

float testinsn (double e)

{

    float d;

    __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) );

    return d;

}

EOF

dnl

dnl test, if assembler supports S390 z196 zarch instructions as default

if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c

			-o conftest.o &> /dev/null]) ;

then

  libc_cv_asm_s390_min_z196_zarch=yes

else

  libc_cv_asm_s390_min_z196_zarch=no

fi

rm -f conftest* ])

if test "$libc_cv_asm_s390_min_z196_zarch" = yes ;

then

  AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT)

fi

test -n "$critic_missing" && AC_MSG_ERROR([

*** $critic_missing])