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