+ }
+}
+
+/**
+ * lowers builtins performing arithmetic (bswap)
+ */
+static void lower_arithmetic_builtin(ir_node *builtin, ir_mode *mode)
+{
+ ir_builtin_kind kind = get_Builtin_kind(builtin);
+ ir_node *operand = get_Builtin_param(builtin, 0);
+ ir_mode *operand_mode = get_irn_mode(operand);
+ (void) mode;
+ if (operand_mode != env->high_signed && operand_mode != env->high_unsigned)
+ return;
+
+ {
+ dbg_info *dbgi = get_irn_dbg_info(builtin);
+ ir_type *type = get_Builtin_type(builtin);
+ ir_type *lowered_type_high = lower_Builtin_type_high(type);
+ ir_type *lowered_type_low = lower_Builtin_type_low(type);
+ ir_node *block = get_nodes_block(builtin);
+ ir_node *mem = get_Builtin_mem(builtin);
+ const lower64_entry_t *entry = get_node_entry(operand);
+ ir_mode *mode_high = get_irn_mode(entry->high_word);
+ ir_node *res_high;
+ ir_node *res_low;
+
+ switch (kind) {
+ case ir_bk_bswap: {
+ ir_node *in_high[1] = { entry->high_word };
+ ir_node *in_low[1] = { entry->low_word };
+ ir_node *swap_high = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
+ ir_node *swap_low = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
+ ir_node *high = new_r_Proj(swap_high, mode_high, pn_Builtin_max+1);
+ ir_node *low = new_r_Proj(swap_low, env->low_unsigned, pn_Builtin_max+1);
+ if (mode_high == env->low_signed) {
+ res_high = new_rd_Conv(dbgi, block, low, env->low_signed);
+ res_low = new_rd_Conv(dbgi, block, high, env->low_unsigned);
+ } else {
+ res_high = low;
+ res_low = high;
+ }
+ break;
+ }
+ default:
+ panic("unexpected builtin");
+ }
+
+ /* search result Proj */
+ foreach_out_edge_safe(builtin, edge) {
+ ir_node *proj = get_edge_src_irn(edge);
+ if (!is_Proj(proj))
+ continue;
+
+ if (get_Proj_proj(proj) == pn_Builtin_max+1) {
+ ir_set_dw_lowered(proj, res_low, res_high);
+ }
+ }
+ }
+}
+
+/**
+ * Lower double word builtins.
+ */
+static void lower_Builtin(ir_node *builtin, ir_mode *mode)
+{
+ ir_builtin_kind kind = get_Builtin_kind(builtin);
+
+ switch (kind) {
+ case ir_bk_trap:
+ case ir_bk_debugbreak:
+ case ir_bk_return_address:
+ case ir_bk_frame_address:
+ case ir_bk_prefetch:
+ case ir_bk_inport:
+ case ir_bk_outport:
+ case ir_bk_inner_trampoline:
+ /* Nothing to do. */
+ return;
+ case ir_bk_bswap:
+ lower_arithmetic_builtin(builtin, mode);
+ return;
+ case ir_bk_ffs:
+ case ir_bk_clz:
+ case ir_bk_ctz:
+ case ir_bk_popcount:
+ case ir_bk_parity:
+ lower_reduce_builtin(builtin, mode);
+ return;
+ }
+ panic("unknown builtin");