diff options
Diffstat (limited to 'sysdeps/s390/configure.ac')
| -rw-r--r-- | sysdeps/s390/configure.ac | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sysdeps/s390/configure.ac b/sysdeps/s390/configure.ac index 1db6d84a20..8a782e7c3a 100644 --- a/sysdeps/s390/configure.ac +++ b/sysdeps/s390/configure.ac @@ -86,5 +86,31 @@ 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]) |