tcg: allow bswap16_i32 to be implemented by TCG backends

Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6830 c046a42c-6fe2-441c-8c8c-71466251a162

tcg/tcg-opc.h

@@ -89,6 +89,9 @@ DEF2(ext8s_i32, 1, 1, 0, 0)
 #ifdef TCG_TARGET_HAS_ext16s_i32
 DEF2(ext16s_i32, 1, 1, 0, 0)
 #endif
+#ifdef TCG_TARGET_HAS_bswap16_i32
+DEF2(bswap16_i32, 1, 1, 0, 0)
+#endif
 #ifdef TCG_TARGET_HAS_bswap32_i32
 DEF2(bswap32_i32, 1, 1, 0, 0)
 #endif