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
23 * @version $Id: amd64_emitter.c 26746 2009-11-27 08:53:15Z matze $
39 #include "../besched.h"
40 #include "../begnuas.h"
41 #include "../beblocksched.h"
42 #include "../be_dbgout.h"
44 #include "amd64_emitter.h"
45 #include "gen_amd64_emitter.h"
46 #include "amd64_nodes_attr.h"
47 #include "amd64_new_nodes.h"
49 #define SNPRINTF_BUF_LEN 128
51 #include "../benode.h"
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(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(node);
88 } else if (is_amd64_irn(node)) {
89 reg = arch_irn_get_register(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(proj);
103 assert(reg && "no out register found");
107 /*************************************************************
109 * (_) | | / _| | | | |
110 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
111 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
112 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
113 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
116 *************************************************************/
118 void amd64_emit_immediate(const ir_node *node)
124 void amd64_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 amd64_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.
140 static void amd64_emit_cfop_target(const ir_node *node)
142 ir_node *block = get_irn_link(node);
144 be_emit_irprintf("BLOCK_%ld", get_irn_node_nr(block));
148 /***********************************************************************************
151 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
152 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
153 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
154 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
156 ***********************************************************************************/
159 * Default emitter for anything that we don't want to generate code for.
161 static void emit_nothing(const ir_node *node)
167 * Emits code for a return.
169 static void emit_be_Return(const ir_node *node)
171 be_emit_cstring("\tret");
172 be_emit_finish_line_gas(node);
176 * The type of a emitter function.
178 typedef void (emit_func)(const ir_node *irn);
181 * Set a node emitter. Make it a bit more type safe.
183 static inline void set_emitter(ir_op *op, emit_func arm_emit_node)
185 op->ops.generic = (op_func)arm_emit_node;
189 * Enters the emitter functions for handled nodes into the generic
190 * pointer of an opcode.
192 static void amd64_register_emitters(void)
194 /* first clear the generic function pointer for all ops */
195 clear_irp_opcodes_generic_func();
197 /* register all emitter functions defined in spec */
198 amd64_register_spec_emitters();
200 set_emitter(op_be_Return, emit_be_Return);
201 set_emitter(op_be_Start, emit_nothing);
202 set_emitter(op_be_Barrier, emit_nothing);
203 set_emitter(op_be_IncSP, emit_nothing);
206 typedef void (*emit_func_ptr) (const ir_node *);
209 * Emits code for a node.
211 static void amd64_emit_node(const ir_node *node)
213 ir_op *op = get_irn_op(node);
215 if (op->ops.generic) {
216 emit_func_ptr func = (emit_func_ptr) op->ops.generic;
219 ir_fprintf(stderr, "No emitter for node %+F\n", node);
224 * Walks over the nodes in a block connected by scheduling edges
225 * and emits code for each node.
227 static void amd64_gen_block(ir_node *block, void *data)
232 if (! is_Block(block))
235 be_gas_emit_block_name(block);
238 be_emit_write_line();
240 sched_foreach(block, node) {
241 amd64_emit_node(node);
247 * Sets labels for control flow nodes (jump target)
248 * TODO: Jump optimization
250 static void amd64_gen_labels(ir_node *block, void *env)
253 int n = get_Block_n_cfgpreds(block);
256 for (n--; n >= 0; n--) {
257 pred = get_Block_cfgpred(block, n);
258 set_irn_link(pred, block);
265 void amd64_gen_routine(const amd64_code_gen_t *cg, ir_graph *irg)
268 ir_entity *entity = get_irg_entity(irg);
272 /* register all emitter functions */
273 amd64_register_emitters();
275 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
277 be_dbg_method_begin(entity, be_abi_get_stack_layout(cg->birg->abi));
278 be_gas_emit_function_prolog(entity, 4);
280 irg_block_walk_graph(irg, amd64_gen_labels, NULL, NULL);
282 n = ARR_LEN(blk_sched);
283 for (i = 0; i < n; ++i) {
284 ir_node *block = blk_sched[i];
285 ir_node *prev = i > 0 ? blk_sched[i-1] : NULL;
287 set_irn_link(block, prev);
290 for (i = 0; i < n; ++i) {
291 ir_node *block = blk_sched[i];
293 amd64_gen_block(block, 0);
296 be_gas_emit_function_epilog(entity);
299 be_emit_write_line();