| 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 "$libc_cv_gcc_s390_vx" = yes ; |
| then |
| AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT) |
| fi |
| |
| AC_CACHE_CHECK(for S390 z196 zarch instruction support as default, |
| libc_cv_asm_s390_min_z196_zarch, [dnl |
| cat > conftest.c <<\EOF |
| float testinsn (double e) |
| { |
| float d; |
| __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) ); |
| return d; |
| } |
| EOF |
| dnl |
| dnl test, if assembler supports S390 z196 zarch instructions as default |
| if AC_TRY_COMMAND([${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]) |
