nsz Git - libfirm/blob - ir/be/mips/mips_new_nodes.c

   1 /*
   2  * Copyright (C) 1995-2007 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    This file implements the creation of the achitecture specific firm
  23  *           opcodes and the coresponding node constructors for the mips
  24  *           assembler irg.
  25  * @author   Matthias Braun, Mehdi
  26  * @version  $Id$
  27  */
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <stdlib.h>
  33
  34 #include "irprog_t.h"
  35 #include "irgraph_t.h"
  36 #include "irnode_t.h"
  37 #include "irmode_t.h"
  38 #include "ircons_t.h"
  39 #include "iropt_t.h"
  40 #include "irop.h"
  41 #include "firm_common_t.h"
  42 #include "irvrfy_t.h"
  43 #include "irprintf.h"
  44 #include "xmalloc.h"
  45
  46 #include "../bearch_t.h"
  47
  48 #include "mips_nodes_attr.h"
  49 #include "mips_new_nodes.h"
  50 #include "gen_mips_regalloc_if.h"
  51
  52
  53
  54 /***********************************************************************************
  55  *      _                                   _       _             __
  56  *     | |                                 (_)     | |           / _|
  57  *   __| |_   _ _ __ ___  _ __   ___ _ __   _ _ __ | |_ ___ _ __| |_ __ _  ___ ___
  58  *  / _` | | | | '_ ` _ \| '_ \ / _ \ '__| | | '_ \| __/ _ \ '__|  _/ _` |/ __/ _ \
  59  * | (_| | |_| | | | | | | |_) |  __/ |    | | | | | ||  __/ |  | || (_| | (_|  __/
  60  *  \__,_|\__,_|_| |_| |_| .__/ \___|_|    |_|_| |_|\__\___|_|  |_| \__,_|\___\___|
  61  *                       | |
  62  *                       |_|
  63  ***********************************************************************************/
  64
  65 /**
  66  * Dumps the register requirements for either in or out.
  67  */
  68 static void dump_reg_req(FILE *F, ir_node *n, const arch_register_req_t **reqs, int inout) {
  69         char *dir = inout ? "out" : "in";
  70         int   max = inout ? get_mips_n_res(n) : get_irn_arity(n);
  71         char  buf[1024];
  72         int   i;
  73
  74         memset(buf, 0, sizeof(buf));
  75
  76         if (reqs) {
  77                 for (i = 0; i < max; i++) {
  78                         fprintf(F, "%sreq #%d =", dir, i);
  79
  80                         if (reqs[i]->type == arch_register_req_type_none) {
  81                                 fprintf(F, " n/a");
  82                         }
  83
  84                         if (reqs[i]->type & arch_register_req_type_normal) {
  85                                 fprintf(F, " %s", reqs[i]->cls->name);
  86                         }
  87
  88                         if (reqs[i]->type & arch_register_req_type_limited) {
  89                                 fprintf(F, " %s",
  90                                         arch_register_req_format(buf, sizeof(buf), reqs[i], n));
  91                         }
  92
  93                         if (reqs[i]->type & arch_register_req_type_should_be_same) {
  94                                 ir_fprintf(F, " same as %+F", get_irn_n(n, reqs[i]->other_same));
  95                         }
  96
  97                         if (reqs[i]->type & arch_register_req_type_should_be_different) {
  98                                 ir_fprintf(F, " different from %+F", get_irn_n(n, reqs[i]->other_different));
  99                         }
 100
 101                         fprintf(F, "\n");
 102                 }
 103
 104                 fprintf(F, "\n");
 105         } else {
 106                 fprintf(F, "%sreq = N/A\n", dir);
 107         }
 108 }
 109
 110
 111 /**
 112  * Dumper interface for dumping mips nodes in vcg.
 113  * @param n        the node to dump
 114  * @param F        the output file
 115  * @param reason   indicates which kind of information should be dumped
 116  * @return 0 on success or != 0 on failure
 117  */
 118 static int mips_dump_node(ir_node *n, FILE *F, dump_reason_t reason) {
 119         ir_mode     *mode = NULL;
 120         int          bad  = 0;
 121         int          i;
 122         mips_attr_t *attr;
 123         char buf[64];
 124         const arch_register_req_t **reqs;
 125         const arch_register_t     **slots;
 126
 127         switch (reason) {
 128                 case dump_node_opcode_txt:
 129                         fprintf(F, "%s", get_irn_opname(n));
 130                         break;
 131
 132                 case dump_node_mode_txt:
 133                         mode = get_irn_mode(n);
 134
 135                         if (mode) {
 136                                 fprintf(F, "[%s]", get_mode_name(mode));
 137                         }
 138                         else {
 139                                 fprintf(F, "[?NOMODE?]");
 140                         }
 141                         break;
 142
 143                 case dump_node_nodeattr_txt:
 144
 145                         /* TODO: dump some attributes which should show up */
 146                         /* in node name in dump (e.g. consts or the like)  */
 147
 148                         break;
 149
 150                 case dump_node_info_txt:
 151                         attr = get_mips_attr(n);
 152                         fprintf(F, "=== mips attr begin ===\n");
 153
 154                         /* dump IN requirements */
 155                         if (get_irn_arity(n) > 0) {
 156                                 reqs = get_mips_in_req_all(n);
 157                                 dump_reg_req(F, n, reqs, 0);
 158                         }
 159
 160                         /* dump OUT requirements */
 161                         if (attr->n_res > 0) {
 162                                 reqs = get_mips_out_req_all(n);
 163                                 dump_reg_req(F, n, reqs, 1);
 164                         }
 165
 166                         /* dump assigned registers */
 167                         slots = get_mips_slots(n);
 168                         if (slots && attr->n_res > 0) {
 169                                 for (i = 0; i < attr->n_res; i++) {
 170                                         if (slots[i]) {
 171                                                 fprintf(F, "reg #%d = %s\n", i, slots[i]->name);
 172                                         }
 173                                         else {
 174                                                 fprintf(F, "reg #%d = n/a\n", i);
 175                                         }
 176                                 }
 177                         }
 178                         fprintf(F, "\n");
 179
 180                         /* dump n_res */
 181                         fprintf(F, "n_res = %d\n", get_mips_n_res(n));
 182
 183                         /* dump flags */
 184                         fprintf(F, "flags =");
 185                         if (attr->flags == arch_irn_flags_none) {
 186                                 fprintf(F, " none");
 187                         }
 188                         else {
 189                                 if (attr->flags & arch_irn_flags_dont_spill) {
 190                                         fprintf(F, " unspillable");
 191                                 }
 192                                 if (attr->flags & arch_irn_flags_rematerializable) {
 193                                         fprintf(F, " remat");
 194                                 }
 195                                 if (attr->flags & arch_irn_flags_ignore) {
 196                                         fprintf(F, " ignore");
 197                                 }
 198                         }
 199                         fprintf(F, " (%d)\n", attr->flags);
 200
 201                         if(attr->modes.load_store_mode != NULL) {
 202                                 fprintf(F, " load_store_mode %s\n", get_mode_name(attr->modes.load_store_mode));
 203                         }
 204                         if(attr->stack_entity != NULL) {
 205                                 fprintf(F, " stack entity %s\n", get_entity_name(attr->stack_entity));
 206                         }
 207                         if(attr->tv != NULL) {
 208                                 tarval_snprintf(buf, sizeof(buf), attr->tv);
 209                                 fprintf(F, " tarval %s\n", buf);
 210                         }
 211                         if(attr->symconst_id != NULL) {
 212                                 fprintf(F, " symconst '%s'\n", get_id_str(attr->symconst_id));
 213                         }
 214
 215                         fprintf(F, "=== mips attr end ===\n");
 216                         /* end of: case dump_node_info_txt */
 217                         break;
 218         }
 219
 220
 221         return bad;
 222 }
 223
 224
 225
 226 /***************************************************************************************************
 227  *        _   _                   _       __        _                    _   _               _
 228  *       | | | |                 | |     / /       | |                  | | | |             | |
 229  *   __ _| |_| |_ _ __   ___  ___| |_   / /_ _  ___| |_   _ __ ___   ___| |_| |__   ___   __| |___
 230  *  / _` | __| __| '__| / __|/ _ \ __| / / _` |/ _ \ __| | '_ ` _ \ / _ \ __| '_ \ / _ \ / _` / __|
 231  * | (_| | |_| |_| |    \__ \  __/ |_ / / (_| |  __/ |_  | | | | | |  __/ |_| | | | (_) | (_| \__ \
 232  *  \__,_|\__|\__|_|    |___/\___|\__/_/ \__, |\___|\__| |_| |_| |_|\___|\__|_| |_|\___/ \__,_|___/
 233  *                                        __/ |
 234  *                                       |___/
 235  ***************************************************************************************************/
 236
 237 /**
 238  * Wraps get_irn_generic_attr() as it takes no const ir_node, so we need to do a cast.
 239  * Firm was made by people hating const :-(
 240  */
 241 mips_attr_t *get_mips_attr(const ir_node *node) {
 242         assert(is_mips_irn(node) && "need mips node to get attributes");
 243         return (mips_attr_t *)get_irn_generic_attr((ir_node *)node);
 244 }
 245
 246 /**
 247  * Returns the argument register requirements of a mips node.
 248  */
 249 const arch_register_req_t **get_mips_in_req_all(const ir_node *node) {
 250         mips_attr_t *attr = get_mips_attr(node);
 251         return attr->in_req;
 252 }
 253
 254 /**
 255  * Returns the result register requirements of an mips node.
 256  */
 257 const arch_register_req_t **get_mips_out_req_all(const ir_node *node) {
 258         mips_attr_t *attr = get_mips_attr(node);
 259         return attr->out_req;
 260 }
 261
 262 /**
 263  * Returns the argument register requirement at position pos of an mips node.
 264  */
 265 const arch_register_req_t *get_mips_in_req(const ir_node *node, int pos) {
 266         mips_attr_t *attr = get_mips_attr(node);
 267         return attr->in_req[pos];
 268 }
 269
 270 /**
 271  * Returns the result register requirement at position pos of an mips node.
 272  */
 273 const arch_register_req_t *get_mips_out_req(const ir_node *node, int pos) {
 274         mips_attr_t *attr = get_mips_attr(node);
 275         return attr->out_req[pos];
 276 }
 277
 278 /**
 279  * Sets the OUT register requirements at position pos.
 280  */
 281 void set_mips_req_out(ir_node *node, const arch_register_req_t *req, int pos) {
 282         mips_attr_t *attr   = get_mips_attr(node);
 283         attr->out_req[pos] = req;
 284 }
 285
 286 /**
 287  * Sets the IN register requirements at position pos.
 288  */
 289 void set_mips_req_in(ir_node *node, const arch_register_req_t *req, int pos) {
 290         mips_attr_t *attr  = get_mips_attr(node);
 291         attr->in_req[pos] = req;
 292 }
 293
 294 /**
 295  * Returns the register flag of an mips node.
 296  */
 297 arch_irn_flags_t get_mips_flags(const ir_node *node) {
 298         mips_attr_t *attr = get_mips_attr(node);
 299         return attr->flags;
 300 }
 301
 302 /**
 303  * Sets the register flag of an mips node.
 304  */
 305 void set_mips_flags(const ir_node *node, arch_irn_flags_t flags) {
 306         mips_attr_t *attr = get_mips_attr(node);
 307         attr->flags      = flags;
 308 }
 309
 310 /**
 311  * Returns the result register slots of an mips node.
 312  */
 313 const arch_register_t **get_mips_slots(const ir_node *node) {
 314         mips_attr_t *attr = get_mips_attr(node);
 315         return attr->slots;
 316 }
 317
 318 /**
 319  * Returns the name of the OUT register at position pos.
 320  */
 321 const char *get_mips_out_reg_name(const ir_node *node, int pos) {
 322         mips_attr_t *attr = get_mips_attr(node);
 323
 324         assert(is_mips_irn(node) && "Not an mips node.");
 325         assert(pos < attr->n_res && "Invalid OUT position.");
 326         assert(attr->slots[pos]  && "No register assigned");
 327
 328         return arch_register_get_name(attr->slots[pos]);
 329 }
 330
 331 /**
 332  * Returns the index of the OUT register at position pos within its register class.
 333  */
 334 int get_mips_out_regnr(const ir_node *node, int pos) {
 335         mips_attr_t *attr = get_mips_attr(node);
 336
 337         assert(is_mips_irn(node) && "Not an mips node.");
 338         assert(pos < attr->n_res && "Invalid OUT position.");
 339         assert(attr->slots[pos]  && "No register assigned");
 340
 341         return arch_register_get_index(attr->slots[pos]);
 342 }
 343
 344 /**
 345  * Returns the OUT register at position pos.
 346  */
 347 const arch_register_t *get_mips_out_reg(const ir_node *node, int pos) {
 348         mips_attr_t *attr = get_mips_attr(node);
 349
 350         assert(is_mips_irn(node) && "Not an mips node.");
 351         assert(pos < attr->n_res && "Invalid OUT position.");
 352         assert(attr->slots[pos]  && "No register assigned");
 353
 354         return attr->slots[pos];
 355 }
 356
 357 /**
 358  * Sets the number of results.
 359  */
 360 void set_mips_n_res(ir_node *node, int n_res) {
 361         mips_attr_t *attr = get_mips_attr(node);
 362         attr->n_res      = n_res;
 363 }
 364
 365 /**
 366  * Returns the number of results.
 367  */
 368 int get_mips_n_res(const ir_node *node) {
 369         mips_attr_t *attr = get_mips_attr(node);
 370         return attr->n_res;
 371 }
 372
 373 /**
 374  * Initializes the nodes attributes.
 375  */
 376 void init_mips_attributes(ir_node *node, arch_irn_flags_t flags, const arch_register_req_t **in_reqs,
 377                                                   const arch_register_req_t **out_reqs,
 378                                                                                                   const be_execution_unit_t ***execution_units,
 379                                                                                                   int n_res, unsigned latency)
 380 {
 381         mips_attr_t *attr = get_mips_attr(node);
 382
 383         attr->flags = flags;
 384         attr->out_req = out_reqs;
 385
 386         attr->n_res = n_res;
 387         attr->in_req = in_reqs;
 388
 389         memset((void *)attr->slots, 0, n_res * sizeof(attr->slots[0]));
 390 }
 391
 392 /************************************************************************
 393  *  ___ _____     _     _ _
 394  * |_ _|  ___|__ | | __| (_)_ __   __ _
 395  *  | || |_ / _ \| |/ _` | | '_ \ / _` |
 396  *  | ||  _| (_) | | (_| | | | | | (_| |
 397  * |___|_|  \___/|_|\__,_|_|_| |_|\__, |
 398  *                                |___/
 399  ************************************************************************/
 400
 401 // test if a tarval can be expressed in a 16bit immediate value
 402 static int is_tarval_16(ir_node* node)
 403 {
 404         mips_attr_t *attr = get_mips_attr(node);
 405         tarval* tv = attr->tv;
 406         long val = get_tarval_long(tv);
 407         if(get_mode_sign(get_irn_mode(node))) {
 408                 if(val < -32768 || val > 32767)
 409                         return 0;
 410         } else {
 411                 unsigned long uval = (unsigned long) val;
 412                 if(uval > 65536)
 413                         return 0;
 414         }
 415
 416         return 1;
 417 }
 418
 419 #define MIPS_MAKE_IFOLDING_TRANSFORM(srcnode, inode, commutative)       \
 420 ir_node *mips_transform_##srcnode(ir_node* node)                                \
 421 {                                                                                                                               \
 422         ir_node* op1 = get_irn_n(node, 0);                                                      \
 423         ir_node* op2 = get_irn_n(node, 1);                                                      \
 424         ir_node* result;                                                                                        \
 425         if(op1 == NULL || op2 == NULL)                                                          \
 426                 return node;                                                                                    \
 427                                                                                                                                 \
 428         if((is_mips_lli(op2) || is_mips_lui(op2)) && is_tarval_16(op2)) {       \
 429                 mips_attr_t *attr, *op_attr = get_mips_attr(op2);               \
 430                 long val = get_tarval_long(op_attr->tv);                                \
 431                 result = new_rd_mips_##inode(get_irn_dbg_info(node), get_irn_irg(node), get_nodes_block(node),  \
 432                         op1);                                                                       \
 433                 attr = get_mips_attr(result);                                                   \
 434                 attr->tv = new_tarval_from_long(val, get_mode_sign(get_irn_mode(node)) ? mode_Hs : mode_Hu);    \
 435                 return result;                                                                                  \
 436         }                                                                                                                       \
 437                                                                                                                                 \
 438         if(commutative && (is_mips_lli(op1) || is_mips_lui(op1)) && is_tarval_16(op1)) {        \
 439                 mips_attr_t *attr, *op_attr = get_mips_attr(op1);       \
 440                 long val = get_tarval_long(op_attr->tv);                                \
 441                 result = new_rd_mips_##inode(get_irn_dbg_info(node), get_irn_irg(node), get_nodes_block(node),  \
 442                         op2);                                                                       \
 443                 attr = get_mips_attr(result);                                                   \
 444                 attr->tv = new_tarval_from_long(val, get_mode_sign(get_irn_mode(node)) ? mode_Hs : mode_Hu);    \
 445                 return result;                                                                                  \
 446         }                                                                                                                       \
 447                                                                                                                                 \
 448         return node;                                                                                            \
 449 }
 450
 451 MIPS_MAKE_IFOLDING_TRANSFORM(addu, addiu, 1)
 452 MIPS_MAKE_IFOLDING_TRANSFORM(and, andi, 1)
 453 MIPS_MAKE_IFOLDING_TRANSFORM(or, ori, 1)
 454 MIPS_MAKE_IFOLDING_TRANSFORM(sra, srai, 0)
 455 MIPS_MAKE_IFOLDING_TRANSFORM(xor, xori, 1)
 456 MIPS_MAKE_IFOLDING_TRANSFORM(sl, sli, 0)
 457 MIPS_MAKE_IFOLDING_TRANSFORM(sr, sri, 0)
 458 MIPS_MAKE_IFOLDING_TRANSFORM(slt, slti, 0)
 459
 460 void mips_init_opcode_transforms(void) {
 461         op_mips_addu->ops.transform_node = mips_transform_addu;
 462         op_mips_and->ops.transform_node = mips_transform_and;
 463         op_mips_or->ops.transform_node  = mips_transform_or;
 464         op_mips_sra->ops.transform_node = mips_transform_sra;
 465         op_mips_xor->ops.transform_node = mips_transform_xor;
 466         op_mips_sl->ops.transform_node  = mips_transform_sl;
 467         op_mips_sr->ops.transform_node  = mips_transform_sr;
 468         op_mips_slt->ops.transform_node = mips_transform_slt;
 469 }
 470
 471 /***************************************************************************************
 472  *                  _                            _                   _
 473  *                 | |                          | |                 | |
 474  *  _ __   ___   __| | ___    ___ ___  _ __  ___| |_ _ __ _   _  ___| |_ ___  _ __ ___
 475  * | '_ \ / _ \ / _` |/ _ \  / __/ _ \| '_ \/ __| __| '__| | | |/ __| __/ _ \| '__/ __|
 476  * | | | | (_) | (_| |  __/ | (_| (_) | | | \__ \ |_| |  | |_| | (__| || (_) | |  \__ \
 477  * |_| |_|\___/ \__,_|\___|  \___\___/|_| |_|___/\__|_|   \__,_|\___|\__\___/|_|  |___/
 478  *
 479  ***************************************************************************************/
 480
 481 /* Include the generated constructor functions */
 482 #include "gen_mips_new_nodes.c.inl"