X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=libitm%2Facinclude.m4;h=ca7e0a92118029e69e8746d0852e7f91312556a4;hb=167f68ede42b2bb0bf287769951c5a6aca3e7281;hp=eacf8d4538310c70e3291b948c72619eb7026039;hpb=0258b6e46602fef03af8758a17ae64fcd2fc835e;p=gcc.git

diff --git a/libitm/acinclude.m4 b/libitm/acinclude.m4
index eacf8d45383..ca7e0a92118 100644
--- a/libitm/acinclude.m4
+++ b/libitm/acinclude.m4
@@ -135,6 +135,17 @@ powerpc*)
     AC_DEFINE(HAVE_AS_HTM, 1, [Define to 1 if the assembler supports HTM.])
   fi
   ;;
+s390*)
+  AC_CACHE_CHECK([if the assembler supports HTM], libitm_cv_as_htm, [
+    save_CFLAGS="$CFLAGS"
+    CFLAGS="$CFLAGS -march=zEC12"
+    AC_TRY_COMPILE([], [asm("tbegin 0,0; tend");],
+		   [libitm_cv_as_htm=yes], [libitm_cv_as_htm=no])
+    CFLAGS="$save_CFLAGS"])
+  if test x$libitm_cv_as_htm = xyes; then
+    AC_DEFINE(HAVE_AS_HTM, 1, [Define to 1 if the assembler supports HTM.])
+  fi
+  ;;
 esac])
 
 sinclude(../libtool.m4)