S390: Add configure check to detect support for arch13.

Add two configure checks which detect if arch13 is supported
by the assembler at all - by explicitely setting the machine -
and if it is supported with default settings.

ChangeLog:

	* config.h.in (HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT,
	HAVE_S390_ARCH13_ASM_SUPPORT): New undefine.
	* sysdeps/s390/configure.ac: Add checks for arch13 support.
	* sysdeps/s390/configure: Regenerated.

1 files changed, 49 insertions, 0 deletions

diff --git a/sysdeps/s390/configure.ac b/sysdeps/s390/configure.ac
index 4dfb5574b4..3ed5a8ef87 100644
--- a/sysdeps/s390/configure.ac
+++ b/sysdeps/s390/configure.ac
@@ -80,6 +80,32 @@ then
   AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
 fi
 
+AC_CACHE_CHECK(for S390 arch13 zarch instruction support,
+	       libc_cv_asm_s390_arch13, [dnl
+cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ (".machine \"arch13\" \n\t"
+	     ".machinemode \"zarch_nohighgprs\" \n\t"
+	     "lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+dnl test, if assembler supports S390 arch13 instructions
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null]) ;
+then
+  libc_cv_asm_s390_arch13=yes
+else
+  libc_cv_asm_s390_arch13=no
+fi
+rm -f conftest* ])
+if test "$libc_cv_asm_s390_arch13" = yes ;
+then
+  AC_DEFINE(HAVE_S390_ARCH13_ASM_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
@@ -163,5 +189,28 @@ then
   AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT)
 fi
 
+AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default,
+	       libc_cv_asm_s390_min_arch13_zarch, [dnl
+cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ ("lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+dnl test, if assembler supports S390 arch13 zarch instructions as default
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null]) ;
+then
+  libc_cv_asm_s390_min_arch13_zarch=yes
+else
+  libc_cv_asm_s390_min_arch13_zarch=no
+fi
+rm -f conftest* ])
+if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ;
+then
+  AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT)
+fi
+
 test -n "$critic_missing" && AC_MSG_ERROR([
 *** $critic_missing])