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