2 * Copyright (C) 1995-2007 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
41 #include "../besched.h"
43 #include "TEMPLATE_emitter.h"
44 #include "gen_TEMPLATE_emitter.h"
45 #include "TEMPLATE_nodes_attr.h"
46 #include "TEMPLATE_new_nodes.h"
47 #include "TEMPLATE_map_regs.h"
49 #define SNPRINTF_BUF_LEN 128
51 static const arch_env_t *arch_env;
54 * Returns the register at in position pos.
56 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
59 const arch_register_t *reg = NULL;
61 assert(get_irn_arity(node) > pos && "Invalid IN position");
63 /* The out register of the operator at position pos is the
64 in register we need. */
65 op = get_irn_n(node, pos);
67 reg = arch_get_irn_register(arch_env, op);
69 assert(reg && "no in register found");
74 * Returns the register at out position pos.
76 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
79 const arch_register_t *reg = NULL;
81 /* 1st case: irn is not of mode_T, so it has only */
82 /* one OUT register -> good */
83 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
84 /* Proj with the corresponding projnum for the register */
86 if (get_irn_mode(node) != mode_T) {
87 reg = arch_get_irn_register(arch_env, node);
88 } else if (is_TEMPLATE_irn(node)) {
89 reg = get_TEMPLATE_out_reg(node, pos);
91 const ir_edge_t *edge;
93 foreach_out_edge(node, edge) {
94 proj = get_edge_src_irn(edge);
95 assert(is_Proj(proj) && "non-Proj from mode_T node");
96 if (get_Proj_proj(proj) == pos) {
97 reg = arch_get_irn_register(arch_env, proj);
103 assert(reg && "no out register found");
107 /*************************************************************
109 * (_) | | / _| | | | |
110 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
111 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
112 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
113 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
116 *************************************************************/
118 void TEMPLATE_emit_immediate(const ir_node *node)
124 void TEMPLATE_emit_source_register(const ir_node *node, int pos)
126 const arch_register_t *reg = get_in_reg(node, pos);
127 be_emit_string(arch_register_get_name(reg));
130 void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
132 const arch_register_t *reg = get_out_reg(node, pos);
133 be_emit_string(arch_register_get_name(reg));
137 * Returns the target label for a control flow node.
139 static void TEMPLATE_emit_cfop_target(const ir_node *node) {
140 ir_node *block = get_irn_link(node);
142 be_emit_irprintf("BLOCK_%ld", get_irn_node_nr(block));
145 /***********************************************************************************
148 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
149 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
150 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
151 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
153 ***********************************************************************************/
156 * Emits code for a unconditional jump.
158 static void emit_Jmp(const ir_node *node) {
161 /* for now, the code works for scheduled and non-schedules blocks */
162 block = get_nodes_block(node);
164 be_emit_cstring("\tjmp ");
165 TEMPLATE_emit_cfop_target(node);
166 be_emit_finish_line_gas(node);
170 * Enters the emitter functions for handled nodes into the generic
171 * pointer of an opcode.
173 static void TEMPLATE_register_emitters(void) {
175 /* some convienience macros to register additional emitter functions
176 (other than the generated ones) */
177 #define TEMPLATE_EMIT(a) op_TEMPLATE_##a->ops.generic = (op_func)emit_TEMPLATE_##a
178 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
179 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
181 /* first clear the generic function pointer for all ops */
182 clear_irp_opcodes_generic_func();
184 /* register all emitter functions defined in spec */
185 TEMPLATE_register_spec_emitters();
187 /* register addtional emitter functions if needed */
195 typedef void (*emit_func_ptr) (const ir_node *);
198 * Emits code for a node.
200 void TEMPLATE_emit_node(const ir_node *node) {
201 ir_op *op = get_irn_op(node);
203 if (op->ops.generic) {
204 emit_func_ptr func = (emit_func_ptr) op->ops.generic;
207 ir_fprintf(stderr, "No emitter for node %+F\n", node);
212 * Walks over the nodes in a block connected by scheduling edges
213 * and emits code for each node.
215 void TEMPLATE_gen_block(ir_node *block, void *data) {
219 if (! is_Block(block))
222 be_emit_cstring("BLOCK_");
223 be_emit_irprintf("%ld:\n", get_irn_node_nr(block));
224 be_emit_write_line();
226 sched_foreach(block, node) {
227 TEMPLATE_emit_node(node);
233 * Emits code for function start.
235 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) {
249 const char *irg_name = get_entity_name(get_irg_entity(irg));
251 /* TODO: emit function end */
252 be_emit_cstring("/* end of ");
253 be_emit_string(irg_name);
254 be_emit_cstring(" */\n");
255 be_emit_write_line();
259 * Sets labels for control flow nodes (jump target)
260 * TODO: Jump optimization
262 void TEMPLATE_gen_labels(ir_node *block, void *env) {
264 int n = get_Block_n_cfgpreds(block);
267 for (n--; n >= 0; n--) {
268 pred = get_Block_cfgpred(block, n);
269 set_irn_link(pred, block);
276 void TEMPLATE_gen_routine(const TEMPLATE_code_gen_t *cg, ir_graph *irg) {
278 arch_env = cg->arch_env;
280 /* register all emitter functions */
281 TEMPLATE_register_emitters();
283 TEMPLATE_emit_func_prolog(irg);
284 irg_block_walk_graph(irg, TEMPLATE_gen_labels, NULL, NULL);
285 irg_walk_blkwise_graph(irg, NULL, TEMPLATE_gen_block, NULL);
286 TEMPLATE_emit_func_epilog(irg);