mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
4f0a1cea34
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.
70 lines
1.9 KiB
Plaintext
70 lines
1.9 KiB
Plaintext
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)
|
|
|
|
dnl Accept as 2.24 or newer.
|
|
AC_CHECK_PROG_VER(AS, $AS, --version,
|
|
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
|
|
[2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390.")
|
|
|
|
|
|
AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
|
|
cat > conftest.c <<\EOF
|
|
#include <htmintrin.h>
|
|
void testtransaction ()
|
|
{
|
|
if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
|
|
{
|
|
__builtin_tend ();
|
|
}
|
|
}
|
|
EOF
|
|
dnl
|
|
dnl test, if the tbegin instruction is used by __builtin_tbegin
|
|
if AC_TRY_COMMAND([${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 "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
|
|
critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
|
|
fi
|
|
|
|
|
|
AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl
|
|
cat > conftest.c <<\EOF
|
|
void testvecinsn ()
|
|
{
|
|
__asm__ (".machine \"z13\" \n\t"
|
|
".machinemode \"zarch_nohighgprs\" \n\t"
|
|
"vistrbs %%v16,%%v17 \n\t"
|
|
"locghie %%r1,0" : :);
|
|
}
|
|
EOF
|
|
dnl
|
|
dnl test, if assembler supports S390 vector instructions
|
|
if AC_TRY_COMMAND([${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 "$libc_cv_asm_s390_vx" = yes ;
|
|
then
|
|
AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)
|
|
else
|
|
AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])
|
|
fi
|
|
|
|
|
|
test -n "$critic_missing" && AC_MSG_ERROR([
|
|
*** $critic_missing])
|