2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief emit assembler for a backend graph
39 #include "../besched.h"
41 #include "TEMPLATE_emitter.h"
42 #include "gen_TEMPLATE_emitter.h"
43 #include "TEMPLATE_nodes_attr.h"
44 #include "TEMPLATE_new_nodes.h"
46 #define SNPRINTF_BUF_LEN 128
49 * Returns the register at in position pos.
51 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
54 const arch_register_t *reg = NULL;
56 assert(get_irn_arity(node) > pos && "Invalid IN position");
58 /* The out register of the operator at position pos is the
59 in register we need. */
60 op = get_irn_n(node, pos);
62 reg = arch_get_irn_register(op);
64 assert(reg && "no in register found");
69 * Returns the register at out position pos.
71 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
74 const arch_register_t *reg = NULL;
76 /* 1st case: irn is not of mode_T, so it has only */
77 /* one OUT register -> good */
78 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
79 /* Proj with the corresponding projnum for the register */
81 if (get_irn_mode(node) != mode_T) {
82 reg = arch_get_irn_register(node);
83 } else if (is_TEMPLATE_irn(node)) {
84 reg = arch_irn_get_register(node, pos);
86 const ir_edge_t *edge;
88 foreach_out_edge(node, edge) {
89 proj = get_edge_src_irn(edge);
90 assert(is_Proj(proj) && "non-Proj from mode_T node");
91 if (get_Proj_proj(proj) == pos) {
92 reg = arch_get_irn_register(proj);
98 assert(reg && "no out register found");
102 /*************************************************************
104 * (_) | | / _| | | | |
105 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
106 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
107 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
108 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
111 *************************************************************/
113 void TEMPLATE_emit_immediate(const ir_node *node)
119 void TEMPLATE_emit_source_register(const ir_node *node, int pos)
121 const arch_register_t *reg = get_in_reg(node, pos);
122 be_emit_string(arch_register_get_name(reg));
125 void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
127 const arch_register_t *reg = get_out_reg(node, pos);
128 be_emit_string(arch_register_get_name(reg));
132 * Returns the target label for a control flow node.
134 static void TEMPLATE_emit_cfop_target(const ir_node *node)
136 ir_node *block = get_irn_link(node);
137 be_gas_emit_block_name(block);
140 /***********************************************************************************
143 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
144 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
145 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
146 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
148 ***********************************************************************************/
151 * Emits code for a unconditional jump.
153 static void emit_Jmp(const ir_node *node)
157 /* for now, the code works for scheduled and non-schedules blocks */
158 block = get_nodes_block(node);
160 be_emit_cstring("\tjmp ");
161 TEMPLATE_emit_cfop_target(node);
162 be_emit_finish_line_gas(node);
166 * Enters the emitter functions for handled nodes into the generic
167 * pointer of an opcode.
169 static void TEMPLATE_register_emitters(void)
172 /* some convienience macros to register additional emitter functions
173 (other than the generated ones) */
174 #define TEMPLATE_EMIT(a) op_TEMPLATE_##a->ops.generic = (op_func)emit_TEMPLATE_##a
175 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
176 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
178 /* first clear the generic function pointer for all ops */
179 clear_irp_opcodes_generic_func();
181 /* register all emitter functions defined in spec */
182 TEMPLATE_register_spec_emitters();
184 /* register addtional emitter functions if needed */
192 typedef void (*emit_func_ptr) (const ir_node *);
195 * Emits code for a node.
197 void TEMPLATE_emit_node(const ir_node *node)
199 ir_op *op = get_irn_op(node);
201 if (op->ops.generic) {
202 emit_func_ptr func = (emit_func_ptr) op->ops.generic;
205 ir_fprintf(stderr, "No emitter for node %+F\n", node);
210 * Walks over the nodes in a block connected by scheduling edges
211 * and emits code for each node.
213 void TEMPLATE_gen_block(ir_node *block, void *data)
218 if (! is_Block(block))
221 be_gas_emit_block_name(block);
222 be_emit_cstring(":\n");
223 be_emit_write_line();
225 sched_foreach(block, node) {
226 TEMPLATE_emit_node(node);
232 * Emits code for function start.
234 void TEMPLATE_emit_func_prolog(ir_graph *irg)
236 const char *irg_name = get_entity_name(get_irg_entity(irg));
238 /* TODO: emit function header */
239 be_emit_cstring("/* start of ");
240 be_emit_string(irg_name);
241 be_emit_cstring(" */\n");
242 be_emit_write_line();
246 * Emits code for function end
248 void TEMPLATE_emit_func_epilog(ir_graph *irg)
250 const char *irg_name = get_entity_name(get_irg_entity(irg));
252 /* TODO: emit function end */
253 be_emit_cstring("/* end of ");
254 be_emit_string(irg_name);
255 be_emit_cstring(" */\n");
256 be_emit_write_line();
260 * Sets labels for control flow nodes (jump target)
261 * TODO: Jump optimization
263 void TEMPLATE_gen_labels(ir_node *block, void *env)
266 int n = get_Block_n_cfgpreds(block);
269 for (n--; n >= 0; n--) {
270 pred = get_Block_cfgpred(block, n);
271 set_irn_link(pred, block);
278 void TEMPLATE_gen_routine(const TEMPLATE_code_gen_t *cg, ir_graph *irg)
282 /* register all emitter functions */
283 TEMPLATE_register_emitters();
285 TEMPLATE_emit_func_prolog(irg);
286 irg_block_walk_graph(irg, TEMPLATE_gen_labels, NULL, NULL);
287 irg_walk_blkwise_graph(irg, NULL, TEMPLATE_gen_block, NULL);
288 TEMPLATE_emit_func_epilog(irg);