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

   1 /**
   2  * This file implements the creation of the achitecture specific firm opcodes
   3  * and the coresponding node constructors for the mips assembler irg.
   4  * $Id$
   5  */
   6 #ifdef HAVE_CONFIG_H
   7 #include "config.h"
   8 #endif
   9
  10 #ifdef _WIN32
  11 #include <malloc.h>
  12 #else
  13 #include <alloca.h>
  14 #endif
  15
  16 #include <stdlib.h>
  17
  18 #include "irprog_t.h"
  19 #include "irgraph_t.h"
  20 #include "irnode_t.h"
  21 #include "irmode_t.h"
  22 #include "ircons_t.h"
  23 #include "iropt_t.h"
  24 #include "irop.h"
  25 #include "firm_common_t.h"
  26 #include "irvrfy_t.h"
  27 #include "irprintf.h"
  28
  29 #include "../bearch.h"
  30
  31 #include "mips_nodes_attr.h"
  32 #include "mips_new_nodes.h"
  33 #include "gen_mips_regalloc_if.h"
  34
  35
  36
  37 /***********************************************************************************
  38  *      _                                   _       _             __
  39  *     | |                                 (_)     | |           / _|
  40  *   __| |_   _ _ __ ___  _ __   ___ _ __   _ _ __ | |_ ___ _ __| |_ __ _  ___ ___
  41  *  / _` | | | | '_ ` _ \| '_ \ / _ \ '__| | | '_ \| __/ _ \ '__|  _/ _` |/ __/ _ \
  42  * | (_| | |_| | | | | | | |_) |  __/ |    | | | | | ||  __/ |  | || (_| | (_|  __/
  43  *  \__,_|\__,_|_| |_| |_| .__/ \___|_|    |_|_| |_|\__\___|_|  |_| \__,_|\___\___|
  44  *                       | |
  45  *                       |_|
  46  ***********************************************************************************/
  47
  48 /**
  49  * Returns a string containing the names of all registers within the limited bitset
  50  */
  51 static char *get_limited_regs(const arch_register_req_t *req, char *buf, int max) {
  52         bitset_t *bs   = bitset_alloca(req->cls->n_regs);
  53         char     *p    = buf;
  54         int       size = 0;
  55         int       i, cnt;
  56
  57         req->limited(NULL, bs);
  58
  59         for (i = 0; i < req->cls->n_regs; i++) {
  60                 if (bitset_is_set(bs, i)) {
  61                         cnt = snprintf(p, max - size, " %s", req->cls->regs[i].name);
  62                         if (cnt < 0) {
  63                                 fprintf(stderr, "dumper problem, exiting\n");
  64                                 exit(1);
  65                         }
  66
  67                         p    += cnt;
  68                         size += cnt;
  69
  70                         if (size >= max)
  71                                 break;
  72                 }
  73         }
  74
  75         return buf;
  76 }
  77
  78 /**
  79  * Dumps the register requirements for either in or out.
  80  */
  81 static void dump_reg_req(FILE *F, ir_node *n, const mips_register_req_t **reqs, int inout) {
  82         char *dir = inout ? "out" : "in";
  83         int   max = inout ? get_mips_n_res(n) : get_irn_arity(n);
  84         char *buf = alloca(1024);
  85         int   i;
  86
  87         memset(buf, 0, 1024);
  88
  89         if (reqs) {
  90                 for (i = 0; i < max; i++) {
  91                         fprintf(F, "%sreq #%d =", dir, i);
  92
  93                         if (reqs[i]->req.type == arch_register_req_type_none) {
  94                                 fprintf(F, " n/a");
  95                         }
  96
  97                         if (reqs[i]->req.type & arch_register_req_type_normal) {
  98                                 fprintf(F, " %s", reqs[i]->req.cls->name);
  99                         }
 100
 101                         if (reqs[i]->req.type & arch_register_req_type_limited) {
 102                                 fprintf(F, " %s", get_limited_regs(&reqs[i]->req, buf, 1024));
 103                         }
 104
 105                         if (reqs[i]->req.type & arch_register_req_type_should_be_same) {
 106                                 ir_fprintf(F, " same as %+F", get_irn_n(n, reqs[i]->same_pos));
 107                         }
 108
 109                         if (reqs[i]->req.type & arch_register_req_type_should_be_different) {
 110                                 ir_fprintf(F, " different from %+F", get_irn_n(n, reqs[i]->different_pos));
 111                         }
 112
 113                         fprintf(F, "\n");
 114                 }
 115
 116                 fprintf(F, "\n");
 117         }
 118         else {
 119                 fprintf(F, "%sreq = N/A\n", dir);
 120         }
 121 }
 122
 123
 124 /**
 125  * Dumper interface for dumping mips nodes in vcg.
 126  * @param n        the node to dump
 127  * @param F        the output file
 128  * @param reason   indicates which kind of information should be dumped
 129  * @return 0 on success or != 0 on failure
 130  */
 131 static int mips_dump_node(ir_node *n, FILE *F, dump_reason_t reason) {
 132         ir_mode     *mode = NULL;
 133         int          bad  = 0;
 134         int          i;
 135         mips_attr_t *attr;
 136         char buf[64];
 137         const mips_register_req_t **reqs;
 138         const arch_register_t     **slots;
 139
 140         switch (reason) {
 141                 case dump_node_opcode_txt:
 142                         fprintf(F, "%s", get_irn_opname(n));
 143                         break;
 144
 145                 case dump_node_mode_txt:
 146                         mode = get_irn_mode(n);
 147
 148                         if (mode) {
 149                                 fprintf(F, "[%s]", get_mode_name(mode));
 150                         }
 151                         else {
 152                                 fprintf(F, "[?NOMODE?]");
 153                         }
 154                         break;
 155
 156                 case dump_node_nodeattr_txt:
 157
 158                         /* TODO: dump some attributes which should show up */
 159                         /* in node name in dump (e.g. consts or the like)  */
 160
 161                         break;
 162
 163                 case dump_node_info_txt:
 164                         attr = get_mips_attr(n);
 165                         fprintf(F, "=== mips attr begin ===\n");
 166
 167                         /* dump IN requirements */
 168                         if (get_irn_arity(n) > 0) {
 169                                 reqs = get_mips_in_req_all(n);
 170                                 dump_reg_req(F, n, reqs, 0);
 171                         }
 172
 173                         /* dump OUT requirements */
 174                         if (attr->n_res > 0) {
 175                                 reqs = get_mips_out_req_all(n);
 176                                 dump_reg_req(F, n, reqs, 1);
 177                         }
 178
 179                         /* dump assigned registers */
 180                         slots = get_mips_slots(n);
 181                         if (slots && attr->n_res > 0) {
 182                                 for (i = 0; i < attr->n_res; i++) {
 183                                         if (slots[i]) {
 184                                                 fprintf(F, "reg #%d = %s\n", i, slots[i]->name);
 185                                         }
 186                                         else {
 187                                                 fprintf(F, "reg #%d = n/a\n", i);
 188                                         }
 189                                 }
 190                         }
 191                         fprintf(F, "\n");
 192
 193                         /* dump n_res */
 194                         fprintf(F, "n_res = %d\n", get_mips_n_res(n));
 195
 196                         /* dump flags */
 197                         fprintf(F, "flags =");
 198                         if (attr->flags == arch_irn_flags_none) {
 199                                 fprintf(F, " none");
 200                         }
 201                         else {
 202                                 if (attr->flags & arch_irn_flags_dont_spill) {
 203                                         fprintf(F, " unspillable");
 204                                 }
 205                                 if (attr->flags & arch_irn_flags_rematerializable) {
 206                                         fprintf(F, " remat");
 207                                 }
 208                                 if (attr->flags & arch_irn_flags_ignore) {
 209                                         fprintf(F, " ignore");
 210                                 }
 211                         }
 212                         fprintf(F, " (%d)\n", attr->flags);
 213
 214                         if(attr->modes.load_store_mode != NULL) {
 215                                 fprintf(F, " load_store_mode %s\n", get_mode_name(attr->modes.load_store_mode));
 216                         }
 217                         if(attr->stack_entity != NULL) {
 218                                 fprintf(F, " stack entity %s\n", get_entity_name(attr->stack_entity));
 219                         }
 220                         if(attr->tv != NULL) {
 221                                 tarval_snprintf(buf, sizeof(buf), attr->tv);
 222                                 fprintf(F, " tarval %s\n", buf);
 223                         }
 224                         if(attr->symconst_id != NULL) {
 225                                 fprintf(F, " symconst '%s'\n", get_id_str(attr->symconst_id));
 226                         }
 227
 228                         fprintf(F, "=== mips attr end ===\n");
 229                         /* end of: case dump_node_info_txt */
 230                         break;
 231         }
 232
 233
 234         return bad;
 235 }
 236
 237
 238
 239 /***************************************************************************************************
 240  *        _   _                   _       __        _                    _   _               _
 241  *       | | | |                 | |     / /       | |                  | | | |             | |
 242  *   __ _| |_| |_ _ __   ___  ___| |_   / /_ _  ___| |_   _ __ ___   ___| |_| |__   ___   __| |___
 243  *  / _` | __| __| '__| / __|/ _ \ __| / / _` |/ _ \ __| | '_ ` _ \ / _ \ __| '_ \ / _ \ / _` / __|
 244  * | (_| | |_| |_| |    \__ \  __/ |_ / / (_| |  __/ |_  | | | | | |  __/ |_| | | | (_) | (_| \__ \
 245  *  \__,_|\__|\__|_|    |___/\___|\__/_/ \__, |\___|\__| |_| |_| |_|\___|\__|_| |_|\___/ \__,_|___/
 246  *                                        __/ |
 247  *                                       |___/
 248  ***************************************************************************************************/
 249
 250 /**
 251  * Wraps get_irn_generic_attr() as it takes no const ir_node, so we need to do a cast.
 252  * Firm was made by people hating const :-(
 253  */
 254 mips_attr_t *get_mips_attr(const ir_node *node) {
 255         assert(is_mips_irn(node) && "need mips node to get attributes");
 256         return (mips_attr_t *)get_irn_generic_attr((ir_node *)node);
 257 }
 258
 259 /**
 260  * Returns the argument register requirements of a mips node.
 261  */
 262 const mips_register_req_t **get_mips_in_req_all(const ir_node *node) {
 263         mips_attr_t *attr = get_mips_attr(node);
 264         return attr->in_req;
 265 }
 266
 267 /**
 268  * Returns the result register requirements of an mips node.
 269  */
 270 const mips_register_req_t **get_mips_out_req_all(const ir_node *node) {
 271         mips_attr_t *attr = get_mips_attr(node);
 272         return attr->out_req;
 273 }
 274
 275 /**
 276  * Returns the argument register requirement at position pos of an mips node.
 277  */
 278 const mips_register_req_t *get_mips_in_req(const ir_node *node, int pos) {
 279         mips_attr_t *attr = get_mips_attr(node);
 280         return attr->in_req[pos];
 281 }
 282
 283 /**
 284  * Returns the result register requirement at position pos of an mips node.
 285  */
 286 const mips_register_req_t *get_mips_out_req(const ir_node *node, int pos) {
 287         mips_attr_t *attr = get_mips_attr(node);
 288         return attr->out_req[pos];
 289 }
 290
 291 /**
 292  * Sets the OUT register requirements at position pos.
 293  */
 294 void set_mips_req_out(ir_node *node, const mips_register_req_t *req, int pos) {
 295         mips_attr_t *attr   = get_mips_attr(node);
 296         attr->out_req[pos] = req;
 297 }
 298
 299 /**
 300  * Sets the IN register requirements at position pos.
 301  */
 302 void set_mips_req_in(ir_node *node, const mips_register_req_t *req, int pos) {
 303         mips_attr_t *attr  = get_mips_attr(node);
 304         attr->in_req[pos] = req;
 305 }
 306
 307 /**
 308  * Returns the register flag of an mips node.
 309  */
 310 arch_irn_flags_t get_mips_flags(const ir_node *node) {
 311         mips_attr_t *attr = get_mips_attr(node);
 312         return attr->flags;
 313 }
 314
 315 /**
 316  * Sets the register flag of an mips node.
 317  */
 318 void set_mips_flags(const ir_node *node, arch_irn_flags_t flags) {
 319         mips_attr_t *attr = get_mips_attr(node);
 320         attr->flags      = flags;
 321 }
 322
 323 /**
 324  * Returns the result register slots of an mips node.
 325  */
 326 const arch_register_t **get_mips_slots(const ir_node *node) {
 327         mips_attr_t *attr = get_mips_attr(node);
 328         return attr->slots;
 329 }
 330
 331 /**
 332  * Returns the name of the OUT register at position pos.
 333  */
 334 const char *get_mips_out_reg_name(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_name(attr->slots[pos]);
 342 }
 343
 344 /**
 345  * Returns the index of the OUT register at position pos within its register class.
 346  */
 347 int get_mips_out_regnr(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 arch_register_get_index(attr->slots[pos]);
 355 }
 356
 357 /**
 358  * Returns the OUT register at position pos.
 359  */
 360 const arch_register_t *get_mips_out_reg(const ir_node *node, int pos) {
 361         mips_attr_t *attr = get_mips_attr(node);
 362
 363         assert(is_mips_irn(node) && "Not an mips node.");
 364         assert(pos < attr->n_res && "Invalid OUT position.");
 365         assert(attr->slots[pos]  && "No register assigned");
 366
 367         return attr->slots[pos];
 368 }
 369
 370 /**
 371  * Sets the number of results.
 372  */
 373 void set_mips_n_res(ir_node *node, int n_res) {
 374         mips_attr_t *attr = get_mips_attr(node);
 375         attr->n_res      = n_res;
 376 }
 377
 378 /**
 379  * Returns the number of results.
 380  */
 381 int get_mips_n_res(const ir_node *node) {
 382         mips_attr_t *attr = get_mips_attr(node);
 383         return attr->n_res;
 384 }
 385
 386 /**
 387  * Initializes the nodes attributes.
 388  */
 389 void init_mips_attributes(ir_node *node, arch_irn_flags_t flags, const mips_register_req_t **in_reqs,
 390                                                   const mips_register_req_t **out_reqs, const be_execution_unit_t **execution_units,
 391                                                                                                   int n_res, unsigned latency)
 392 {
 393         mips_attr_t *attr = get_mips_attr(node);
 394
 395         attr->flags = flags;
 396         attr->out_req = out_reqs;
 397
 398         attr->n_res = n_res;
 399         attr->in_req = in_reqs;
 400
 401         memset((void *)attr->slots, 0, n_res * sizeof(attr->slots[0]));
 402 }
 403
 404 /************************************************************************
 405  *  ___ _____     _     _ _
 406  * |_ _|  ___|__ | | __| (_)_ __   __ _
 407  *  | || |_ / _ \| |/ _` | | '_ \ / _` |
 408  *  | ||  _| (_) | | (_| | | | | | (_| |
 409  * |___|_|  \___/|_|\__,_|_|_| |_|\__, |
 410  *                                |___/
 411  ************************************************************************/
 412
 413 // test if a tarval can be expressed in a 16bit immediate value
 414 static int is_tarval_16(ir_node* node)
 415 {
 416         mips_attr_t *attr = get_mips_attr(node);
 417         tarval* tv = attr->tv;
 418         long val = get_tarval_long(tv);
 419         if(get_mode_sign(get_irn_mode(node))) {
 420                 if(val < -32768 || val > 32767)
 421                         return 0;
 422         } else {
 423                 unsigned long uval = (unsigned long) val;
 424                 if(uval > 65536)
 425                         return 0;
 426         }
 427
 428         return 1;
 429 }
 430
 431 #define MIPS_MAKE_IFOLDING_TRANSFORM(srcnode, inode, commutative)       \
 432 ir_node *mips_transform_##srcnode(ir_node* node)                                \
 433 {                                                                                                                               \
 434         ir_node* op1 = get_irn_n(node, 0);                                                      \
 435         ir_node* op2 = get_irn_n(node, 1);                                                      \
 436         ir_node* result;                                                                                        \
 437         if(op1 == NULL || op2 == NULL)                                                          \
 438                 return node;                                                                                    \
 439                                                                                                                                 \
 440         if((is_mips_lli(op2) || is_mips_lui(op2)) && is_tarval_16(op2)) {       \
 441                 mips_attr_t *attr, *op_attr = get_mips_attr(op2);               \
 442                 long val = get_tarval_long(op_attr->tv);                                \
 443                 result = new_rd_mips_##inode(get_irn_dbg_info(node), get_irn_irg(node), get_nodes_block(node),  \
 444                         op1, get_irn_mode(node));                                                       \
 445                 attr = get_mips_attr(result);                                                   \
 446                 attr->tv = new_tarval_from_long(val, get_mode_sign(get_irn_mode(node)) ? mode_Hs : mode_Hu);    \
 447                 return result;                                                                                  \
 448         }                                                                                                                       \
 449                                                                                                                                 \
 450         if(commutative && (is_mips_lli(op1) || is_mips_lui(op1)) && is_tarval_16(op1)) {        \
 451                 mips_attr_t *attr, *op_attr = get_mips_attr(op1);       \
 452                 long val = get_tarval_long(op_attr->tv);                                \
 453                 result = new_rd_mips_##inode(get_irn_dbg_info(node), get_irn_irg(node), get_nodes_block(node),  \
 454                         op2, get_irn_mode(node));                                                       \
 455                 attr = get_mips_attr(result);                                                   \
 456                 attr->tv = new_tarval_from_long(val, get_mode_sign(get_irn_mode(node)) ? mode_Hs : mode_Hu);    \
 457                 return result;                                                                                  \
 458         }                                                                                                                       \
 459                                                                                                                                 \
 460         return node;                                                                                            \
 461 }
 462
 463 MIPS_MAKE_IFOLDING_TRANSFORM(add, addi, 1)
 464 MIPS_MAKE_IFOLDING_TRANSFORM(and, andi, 1)
 465 MIPS_MAKE_IFOLDING_TRANSFORM(or, ori, 1)
 466 MIPS_MAKE_IFOLDING_TRANSFORM(sra, srai, 0)
 467 MIPS_MAKE_IFOLDING_TRANSFORM(xor, xori, 1)
 468 MIPS_MAKE_IFOLDING_TRANSFORM(sl, sli, 0)
 469 MIPS_MAKE_IFOLDING_TRANSFORM(sr, sri, 0)
 470 MIPS_MAKE_IFOLDING_TRANSFORM(slt, slti, 0)
 471
 472 void mips_init_opcode_transforms(void) {
 473         op_mips_add->ops.transform_node = mips_transform_add;
 474         op_mips_and->ops.transform_node = mips_transform_and;
 475         op_mips_or->ops.transform_node  = mips_transform_or;
 476         op_mips_sra->ops.transform_node = mips_transform_sra;
 477         op_mips_xor->ops.transform_node = mips_transform_xor;
 478         op_mips_sl->ops.transform_node  = mips_transform_sl;
 479         op_mips_sr->ops.transform_node  = mips_transform_sr;
 480         op_mips_slt->ops.transform_node = mips_transform_slt;
 481 }
 482
 483 /***************************************************************************************
 484  *                  _                            _                   _
 485  *                 | |                          | |                 | |
 486  *  _ __   ___   __| | ___    ___ ___  _ __  ___| |_ _ __ _   _  ___| |_ ___  _ __ ___
 487  * | '_ \ / _ \ / _` |/ _ \  / __/ _ \| '_ \/ __| __| '__| | | |/ __| __/ _ \| '__/ __|
 488  * | | | | (_) | (_| |  __/ | (_| (_) | | | \__ \ |_| |  | |_| | (__| || (_) | |  \__ \
 489  * |_| |_|\___/ \__,_|\___|  \___\___/|_| |_|___/\__|_|   \__,_|\___|\__\___/|_|  |___/
 490  *
 491  ***************************************************************************************/
 492
 493 /* Include the generated constructor functions */
 494 #include "gen_mips_new_nodes.c.inl"