1 /*
2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
3 *
4 * This file is part of libFirm.
5 *
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.
10 *
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.
14 *
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
17 * PURPOSE.
18 */
19
20 /**
21 * @file
22 * @brief Processor architecture specification.
23 * @author Sebastian Hack
24 */
25 #include "config.h"
26
27 #include <string.h>
28
29 #include "bearch.h"
30 #include "benode.h"
31 #include "beinfo.h"
32 #include "ircons_t.h"
33 #include "irnode_t.h"
34 #include "irop_t.h"
35
36 #include "bitset.h"
37 #include "pset.h"
38 #include "raw_bitset.h"
39
40 #include "irprintf.h"
41
42 static const arch_register_req_t no_requirement = {
43 arch_register_req_type_none,
44 NULL,
45 NULL,
46 0,
47 0,
48 0
49 };
50 const arch_register_req_t *arch_no_register_req = &no_requirement;
51
52 static reg_out_info_t dummy_info = {
53 NULL,
54 &no_requirement
55 };
56
57 /* Initialize the architecture environment struct. */
arch_env_begin_codegeneration(const arch_isa_if_t * isa_if,be_main_env_t * main_env)58 arch_env_t *arch_env_begin_codegeneration(const arch_isa_if_t *isa_if,
59 be_main_env_t *main_env)
60 {
61 arch_env_t *arch_env = isa_if->begin_codegeneration(main_env);
62 arch_env->main_env = main_env;
63 return arch_env;
64 }
65
66 /**
67 * Get the isa responsible for a node.
68 * @param irn The node to get the responsible isa for.
69 * @return The irn operations given by the responsible isa.
70 */
get_irn_ops(const ir_node * irn)71 static const arch_irn_ops_t *get_irn_ops(const ir_node *irn)
72 {
73 if (is_Proj(irn)) {
74 irn = get_Proj_pred(irn);
75 assert(!is_Proj(irn));
76 }
77
78 ir_op *ops = get_irn_op(irn);
79 const arch_irn_ops_t *be_ops = get_op_ops(ops)->be_ops;
80
81 return be_ops;
82 }
83
arch_set_frame_offset(ir_node * irn,int offset)84 void arch_set_frame_offset(ir_node *irn, int offset)
85 {
86 const arch_irn_ops_t *ops = get_irn_ops(irn);
87 ops->set_frame_offset(irn, offset);
88 }
89
arch_get_frame_entity(const ir_node * irn)90 ir_entity *arch_get_frame_entity(const ir_node *irn)
91 {
92 const arch_irn_ops_t *ops = get_irn_ops(irn);
93 return ops->get_frame_entity(irn);
94 }
95
arch_get_sp_bias(ir_node * irn)96 int arch_get_sp_bias(ir_node *irn)
97 {
98 const arch_irn_ops_t *ops = get_irn_ops(irn);
99 return ops->get_sp_bias(irn);
100 }
101
arch_get_inverse(const ir_node * irn,int i,arch_inverse_t * inverse,struct obstack * obstack)102 arch_inverse_t *arch_get_inverse(const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack)
103 {
104 const arch_irn_ops_t *ops = get_irn_ops(irn);
105
106 if (ops->get_inverse) {
107 return ops->get_inverse(irn, i, inverse, obstack);
108 } else {
109 return NULL;
110 }
111 }
112
arch_possible_memory_operand(const ir_node * irn,unsigned int i)113 int arch_possible_memory_operand(const ir_node *irn, unsigned int i)
114 {
115 const arch_irn_ops_t *ops = get_irn_ops(irn);
116
117 if (ops->possible_memory_operand) {
118 return ops->possible_memory_operand(irn, i);
119 } else {
120 return 0;
121 }
122 }
123
arch_perform_memory_operand(ir_node * irn,ir_node * spill,unsigned int i)124 void arch_perform_memory_operand(ir_node *irn, ir_node *spill, unsigned int i)
125 {
126 const arch_irn_ops_t *ops = get_irn_ops(irn);
127
128 if (ops->perform_memory_operand) {
129 ops->perform_memory_operand(irn, spill, i);
130 } else {
131 return;
132 }
133 }
134
arch_get_op_estimated_cost(const ir_node * irn)135 int arch_get_op_estimated_cost(const ir_node *irn)
136 {
137 const arch_irn_ops_t *ops = get_irn_ops(irn);
138
139 if (ops->get_op_estimated_cost) {
140 return ops->get_op_estimated_cost(irn);
141 } else {
142 return 1;
143 }
144 }
145
get_out_info(const ir_node * node)146 static reg_out_info_t *get_out_info(const ir_node *node)
147 {
148 size_t pos = 0;
149 const backend_info_t *info;
150 assert(get_irn_mode(node) != mode_T);
151 if (is_Proj(node)) {
152 pos = get_Proj_proj(node);
153 node = get_Proj_pred(node);
154 }
155
156 info = be_get_info(node);
157 /* We have a problem with the switch-node where there can be arbitrary
158 * Proj-numbers, so we can't easily allocate an array big-enough to hold
159 * all of them. So until we rewrite Switch-nodes we need this special case
160 */
161 if (info->out_infos == NULL)
162 return &dummy_info;
163 assert(pos < ARR_LEN(info->out_infos));
164 return &info->out_infos[pos];
165 }
166
get_out_info_n(const ir_node * node,unsigned pos)167 static reg_out_info_t *get_out_info_n(const ir_node *node, unsigned pos)
168 {
169 const backend_info_t *info = be_get_info(node);
170 assert(!is_Proj(node));
171 assert(pos < (unsigned)ARR_LEN(info->out_infos));
172 return &info->out_infos[pos];
173 }
174
175
arch_get_irn_register(const ir_node * node)176 const arch_register_t *arch_get_irn_register(const ir_node *node)
177 {
178 const reg_out_info_t *out = get_out_info(node);
179 return out->reg;
180 }
181
arch_get_irn_register_out(const ir_node * node,unsigned pos)182 const arch_register_t *arch_get_irn_register_out(const ir_node *node,
183 unsigned pos)
184 {
185 const reg_out_info_t *out = get_out_info_n(node, pos);
186 return out->reg;
187 }
188
arch_get_irn_register_in(const ir_node * node,int pos)189 const arch_register_t *arch_get_irn_register_in(const ir_node *node, int pos)
190 {
191 ir_node *op = get_irn_n(node, pos);
192 return arch_get_irn_register(op);
193 }
194
arch_set_irn_register_out(ir_node * node,unsigned pos,const arch_register_t * reg)195 void arch_set_irn_register_out(ir_node *node, unsigned pos,
196 const arch_register_t *reg)
197 {
198 reg_out_info_t *out = get_out_info_n(node, pos);
199 out->reg = reg;
200 }
201
arch_set_irn_register(ir_node * node,const arch_register_t * reg)202 void arch_set_irn_register(ir_node *node, const arch_register_t *reg)
203 {
204 reg_out_info_t *out = get_out_info(node);
205 out->reg = reg;
206 }
207
arch_get_irn_register_req(const ir_node * node)208 const arch_register_req_t *arch_get_irn_register_req(const ir_node *node)
209 {
210 reg_out_info_t *out = get_out_info(node);
211 return out->req;
212 }
213
arch_get_irn_flags(const ir_node * node)214 arch_irn_flags_t arch_get_irn_flags(const ir_node *node)
215 {
216 backend_info_t *info;
217 if (is_Proj(node))
218 return arch_irn_flags_not_scheduled;
219
220 info = be_get_info(node);
221 return info->flags;
222 }
223
arch_set_irn_flags(ir_node * node,arch_irn_flags_t flags)224 void arch_set_irn_flags(ir_node *node, arch_irn_flags_t flags)
225 {
226 backend_info_t *info;
227
228 /* setting flags is only supported for instructions currently.
229 * (mainly because we found no use for it yet and saved the space for
230 * be_infos for them */
231 assert(!is_Proj(node));
232 info = be_get_info(node);
233 info->flags = flags;
234 }
235
arch_add_irn_flags(ir_node * node,arch_irn_flags_t flags)236 void arch_add_irn_flags(ir_node *node, arch_irn_flags_t flags)
237 {
238 backend_info_t *info;
239 assert(!is_Proj(node));
240 info = be_get_info(node);
241 info->flags |= flags;
242 }
243
arch_reg_is_allocatable(const arch_register_req_t * req,const arch_register_t * reg)244 bool arch_reg_is_allocatable(const arch_register_req_t *req,
245 const arch_register_t *reg)
246 {
247 if (reg->type & arch_register_type_joker)
248 return true;
249 if (req->type == arch_register_req_type_none)
250 return false;
251 if (req->type & arch_register_req_type_limited) {
252 if (reg->reg_class != req->cls)
253 return false;
254 return rbitset_is_set(req->limited, reg->index);
255 }
256 return req->cls == reg->reg_class;
257 }
258
arch_dump_register_req(FILE * F,const arch_register_req_t * req,const ir_node * node)259 void arch_dump_register_req(FILE *F, const arch_register_req_t *req,
260 const ir_node *node)
261 {
262 if (req == NULL || req->type == arch_register_req_type_none) {
263 fprintf(F, "n/a");
264 return;
265 }
266
267 fprintf(F, "%s", req->cls->name);
268
269 if (arch_register_req_is(req, limited)) {
270 unsigned n_regs = req->cls->n_regs;
271 unsigned i;
272
273 fprintf(F, " limited to");
274 for (i = 0; i < n_regs; ++i) {
275 if (rbitset_is_set(req->limited, i)) {
276 const arch_register_t *reg = &req->cls->regs[i];
277 fprintf(F, " %s", reg->name);
278 }
279 }
280 }
281
282 if (arch_register_req_is(req, should_be_same)) {
283 const unsigned other = req->other_same;
284 int i;
285
286 fprintf(F, " same as");
287 for (i = 0; 1U << i <= other; ++i) {
288 if (other & (1U << i)) {
289 ir_fprintf(F, " %+F", get_irn_n(skip_Proj_const(node), i));
290 }
291 }
292 }
293
294 if (arch_register_req_is(req, must_be_different)) {
295 const unsigned other = req->other_different;
296 int i;
297
298 fprintf(F, " different from");
299 for (i = 0; 1U << i <= other; ++i) {
300 if (other & (1U << i)) {
301 ir_fprintf(F, " %+F", get_irn_n(skip_Proj_const(node), i));
302 }
303 }
304 }
305
306 if (req->width != 1) {
307 fprintf(F, " width:%d", req->width);
308 }
309 if (arch_register_req_is(req, aligned)) {
310 fprintf(F, " aligned");
311 }
312 if (arch_register_req_is(req, ignore)) {
313 fprintf(F, " ignore");
314 }
315 if (arch_register_req_is(req, produces_sp)) {
316 fprintf(F, " produces_sp");
317 }
318 }
319
arch_dump_reqs_and_registers(FILE * F,const ir_node * node)320 void arch_dump_reqs_and_registers(FILE *F, const ir_node *node)
321 {
322 int n_ins = get_irn_arity(node);
323 for (int i = 0; i < n_ins; ++i) {
324 const arch_register_req_t *req = arch_get_irn_register_req_in(node, i);
325 fprintf(F, "inreq #%d = ", i);
326 arch_dump_register_req(F, req, node);
327 fputs("\n", F);
328 }
329 unsigned n_outs = arch_get_irn_n_outs(node);
330 for (unsigned o = 0; o < n_outs; ++o) {
331 const arch_register_req_t *req = arch_get_irn_register_req_out(node, o);
332 fprintf(F, "outreq #%u = ", o);
333 arch_dump_register_req(F, req, node);
334 fputs("\n", F);
335 }
336 for (unsigned o = 0; o < n_outs; ++o) {
337 const arch_register_t *reg = arch_get_irn_register_out(node, o);
338 const arch_register_req_t *req = arch_get_irn_register_req_out(node, o);
339 if (req->cls == NULL)
340 continue;
341 fprintf(F, "reg #%u = %s\n", o, reg != NULL ? reg->name : "n/a");
342 }
343
344 fprintf(F, "flags =");
345 arch_irn_flags_t flags = arch_get_irn_flags(node);
346 if (flags == arch_irn_flags_none) {
347 fprintf(F, " none");
348 } else {
349 if (flags & arch_irn_flags_dont_spill) {
350 fprintf(F, " unspillable");
351 }
352 if (flags & arch_irn_flags_rematerializable) {
353 fprintf(F, " remat");
354 }
355 if (flags & arch_irn_flags_modify_flags) {
356 fprintf(F, " modify_flags");
357 }
358 if (flags & arch_irn_flags_simple_jump) {
359 fprintf(F, " simple_jump");
360 }
361 if (flags & arch_irn_flags_not_scheduled) {
362 fprintf(F, " not_scheduled");
363 }
364 }
365 fprintf(F, " (0x%x)\n", (unsigned)flags);
366 }
367