PR target/44074

	* configure.ac (HAVE_AS_IX86_REP_LOCK_PREFIX): New test.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/i386/i386.c (print_operand) <case ;>: Also print ; if
	!HAVE_AS_IX86_REP_LOCK_PREFIX.
	Don't emit whitespace.
	* config/i386/i386.md (*rep_movdi_rex64): Use {%;} after rep.
	(*rep_movsi): Likewise.
	(*rep_movsi_rex64): Likewise.
	(*rep_movqi): Likewise.
	(*rep_movqi_rex64): Likewise.
	(*rep_stosdi_rex64): Likewise.
	(*rep_stossi): Likewise.
	(*rep_stossi_rex64): Likewise.
	(*rep_stosqi): Likewise.
	(*rep_stosqi_rex64): Likewise.
	(*cmpstrnqi_nz_1): Use {%;} after repz.
	(*cmpstrnqi_nz_rex_1): Likewise.
	(*cmpstrnqi_1): Likewise.
	(*cmpstrnqi_rex_1): Likewise.
	(*strlenqi_1): Use {%;} after repnz.
	(*strlenqi_rex_1): Likewise.
	* config/i386/sync.md (memory_barrier_nosse): Replace {%;| } by {%;} .
	(*sync_compare_and_swap<mode>): Likewise.
	(sync_double_compare_and_swap<mode>): Likewise.
	(*sync_double_compare_and_swapdi_pic): Likewise.
	(sync_old_add<mode>): Likewise.
	(sync_add<mode>): Likewise.
	(sync_sub<mode>): Likewise.
	(sync_<code><mode>): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159512 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 35 insertions, 1 deletions

diff --git a/gcc/configure b/gcc/configure
index 0f39e4ebfdc..2384f424917 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -23228,7 +23228,7 @@ $as_echo "#define HAVE_AS_IX86_DIFF_SECT_DELTA 1" >>confdefs.h
 
 fi
 
-    # This one is used unconditionally by i386.[ch]; it is to be defined
+    # These two are used unconditionally by i386.[ch]; it is to be defined
     # to 1 if the feature is present, 0 otherwise.
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for GOTOFF in data" >&5
 $as_echo_n "checking assembler for GOTOFF in data... " >&6; }
@@ -23269,6 +23269,40 @@ cat >>confdefs.h <<_ACEOF
 #define HAVE_AS_GOTOFF_IN_DATA `if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`
 _ACEOF
 
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for rep and lock prefix" >&5
+$as_echo_n "checking assembler for rep and lock prefix... " >&6; }
+if test "${gcc_cv_as_ix86_rep_lock_prefix+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_ix86_rep_lock_prefix=no
+  if test x$gcc_cv_as != x; then
+    echo 'rep movsl
+	 lock orl $0, (%esp)' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags  -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_ix86_rep_lock_prefix=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_ix86_rep_lock_prefix" >&5
+$as_echo "$gcc_cv_as_ix86_rep_lock_prefix" >&6; }
+
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_AS_IX86_REP_LOCK_PREFIX `if test $gcc_cv_as_ix86_rep_lock_prefix = yes; then echo 1; else echo 0; fi`
+_ACEOF
+
+
     ;;
 
   ia64*-*-*)