tcg-s390: Implement add2/sub2 opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>
diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
index 0929d55..da726bd 100644
--- a/tcg/s390/tcg-target.h
+++ b/tcg/s390/tcg-target.h
@@ -65,8 +65,8 @@
 #define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_deposit_i32      0
 #define TCG_TARGET_HAS_movcond_i32      0
-#define TCG_TARGET_HAS_add2_i32         0
-#define TCG_TARGET_HAS_sub2_i32         0
+#define TCG_TARGET_HAS_add2_i32         1
+#define TCG_TARGET_HAS_sub2_i32         1
 #define TCG_TARGET_HAS_mulu2_i32        0
 #define TCG_TARGET_HAS_muls2_i32        0
 
@@ -90,8 +90,8 @@
 #define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_deposit_i64      0
 #define TCG_TARGET_HAS_movcond_i64      0
-#define TCG_TARGET_HAS_add2_i64         0
-#define TCG_TARGET_HAS_sub2_i64         0
+#define TCG_TARGET_HAS_add2_i64         1
+#define TCG_TARGET_HAS_sub2_i64         1
 #define TCG_TARGET_HAS_mulu2_i64        0
 #define TCG_TARGET_HAS_muls2_i64        0