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
40 #include "beblocksched.h"
43 #include "TEMPLATE_emitter.h"
44 #include "gen_TEMPLATE_emitter.h"
45 #include "gen_TEMPLATE_regalloc_if.h"
46 #include "TEMPLATE_nodes_attr.h"
47 #include "TEMPLATE_new_nodes.h"
49 static void TEMPLATE_emit_immediate(const ir_node *node)
51 const TEMPLATE_attr_t *attr = get_TEMPLATE_attr_const(node);
52 be_emit_irprintf("%T", attr->value);
55 static void emit_register(const arch_register_t *reg)
57 be_emit_string(arch_register_get_name(reg));
60 static void TEMPLATE_emit_source_register(const ir_node *node, int pos)
62 const arch_register_t *reg = arch_get_irn_register_in(node, pos);
66 static void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
68 const arch_register_t *reg = arch_get_irn_register_out(node, pos);
73 * Returns the target label for a control flow node.
75 static void TEMPLATE_emit_cfop_target(const ir_node *node)
77 ir_node *block = (ir_node*)get_irn_link(node);
78 be_gas_emit_block_name(block);
81 void TEMPLATE_emitf(const ir_node *node, const char *format, ...)
87 const char *start = format;
88 while (*format != '%' && *format != '\0')
90 be_emit_string_len(start, format-start);
101 if (*format < '0' || '9' <= *format)
103 unsigned const pos = *format++ - '0';
104 TEMPLATE_emit_source_register(node, pos);
109 if (*format < '0' || '9' <= *format)
111 unsigned const pos = *format++ - '0';
112 TEMPLATE_emit_dest_register(node, pos);
117 TEMPLATE_emit_immediate(node);
121 int num = va_arg(ap, int);
122 be_emit_irprintf("%X", num);
127 unsigned num = va_arg(ap, unsigned);
128 be_emit_irprintf("%u", num);
133 int num = va_arg(ap, int);
134 be_emit_irprintf("%d", num);
139 const char *string = va_arg(ap, const char *);
140 be_emit_string(string);
145 TEMPLATE_emit_cfop_target(node);
151 be_emit_write_line();
157 panic("unknown format conversion in arm_emitf()");
161 be_emit_finish_line_gas(node);
166 * Emits code for a unconditional jump.
168 static void emit_TEMPLATE_Jmp(const ir_node *node)
170 TEMPLATE_emitf(node, "jmp %L");
173 static void emit_be_IncSP(const ir_node *node)
175 int offset = be_get_IncSP_offset(node);
180 /* downwards growing stack */
181 const char *op = "add";
187 TEMPLATE_emitf(node, "%s %S0, %d, %D0", op, offset);
190 static void emit_be_Start(const ir_node *node)
192 ir_graph *irg = get_irn_irg(node);
193 ir_type *frame_type = get_irg_frame_type(irg);
194 unsigned size = get_type_size_bytes(frame_type);
196 /* emit function prolog */
198 /* allocate stackframe */
200 TEMPLATE_emitf(node, "sub %%sp, %u, %%sp", size);
204 static void emit_be_Return(const ir_node *node)
206 ir_graph *irg = get_irn_irg(node);
207 ir_type *frame_type = get_irg_frame_type(irg);
208 unsigned size = get_type_size_bytes(frame_type);
210 /* emit function epilog here */
212 /* deallocate stackframe */
214 TEMPLATE_emitf(node, "add %%sp, %u, %%sp", size);
218 TEMPLATE_emitf(node, "ret");
221 static void emit_nothing(const ir_node *node)
227 * The type of a emitter function.
229 typedef void (emit_func)(const ir_node *node);
231 static inline void set_emitter(ir_op *op, emit_func func)
233 op->ops.generic = (op_func)func;
237 * Enters the emitter functions for handled nodes into the generic
238 * pointer of an opcode.
240 static void TEMPLATE_register_emitters(void)
242 /* first clear the generic function pointer for all ops */
243 ir_clear_opcodes_generic_func();
245 /* register all emitter functions defined in spec */
246 TEMPLATE_register_spec_emitters();
248 /* custom emitters not provided by the spec */
249 set_emitter(op_TEMPLATE_Jmp, emit_TEMPLATE_Jmp);
250 set_emitter(op_be_IncSP, emit_be_IncSP);
251 set_emitter(op_be_Return, emit_be_Return);
252 set_emitter(op_be_Start, emit_be_Start);
254 /* no need to emit anything for the following nodes */
255 set_emitter(op_Phi, emit_nothing);
256 set_emitter(op_be_Keep, emit_nothing);
259 typedef void (*emit_func_ptr) (const ir_node *);
262 * Emits code for a node.
264 static void TEMPLATE_emit_node(const ir_node *node)
266 ir_op *op = get_irn_op(node);
268 if (op->ops.generic) {
269 emit_func_ptr func = (emit_func_ptr) op->ops.generic;
272 ir_fprintf(stderr, "No emitter for node %+F\n", node);
277 * Walks over the nodes in a block connected by scheduling edges
278 * and emits code for each node.
280 static void TEMPLATE_emit_block(ir_node *block)
282 be_gas_begin_block(block, true);
284 sched_foreach(block, node) {
285 TEMPLATE_emit_node(node);
290 * Sets labels for control flow nodes (jump target)
292 static void TEMPLATE_gen_labels(ir_node *block, void *env)
295 int n = get_Block_n_cfgpreds(block);
298 for (n--; n >= 0; n--) {
299 pred = get_Block_cfgpred(block, n);
300 set_irn_link(pred, block);
307 void TEMPLATE_emit_routine(ir_graph *irg)
309 ir_node **block_schedule;
310 ir_entity *entity = get_irg_entity(irg);
314 /* register all emitter functions */
315 TEMPLATE_register_emitters();
317 /* create the block schedule */
318 block_schedule = be_create_block_schedule(irg);
320 /* emit assembler prolog */
321 be_gas_emit_function_prolog(entity, 4, NULL);
323 /* populate jump link fields with their destinations */
324 irg_block_walk_graph(irg, TEMPLATE_gen_labels, NULL, NULL);
326 n = ARR_LEN(block_schedule);
327 for (i = 0; i < n; ++i) {
328 ir_node *block = block_schedule[i];
329 TEMPLATE_emit_block(block);
331 be_gas_emit_function_epilog(entity);