gas/config/bfin-defs.h

   1 /* bfin-defs.h ADI Blackfin gas header file
   2    Copyright 2005
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #ifndef BFIN_PARSE_H
  23 #define BFIN_PARSE_H
  24
  25 #include <bfd.h>
  26 #include "as.h"
  27
  28 #define PCREL   1
  29 #define CODE_FRAG_SIZE 4096  /* 1 page.  */
  30
  31
  32 /* Definition for all status bits.  */
  33 typedef enum
  34 {
  35   c_0,
  36   c_1,
  37   c_4,
  38   c_2,
  39   c_uimm2,
  40   c_uimm3,
  41   c_imm3,
  42   c_pcrel4,
  43   c_imm4,
  44   c_uimm4s4,
  45   c_uimm4,
  46   c_uimm4s2,
  47   c_negimm5s4,
  48   c_imm5,
  49   c_uimm5,
  50   c_imm6,
  51   c_imm7,
  52   c_imm8,
  53   c_uimm8,
  54   c_pcrel8,
  55   c_uimm8s4,
  56   c_pcrel8s4,
  57   c_lppcrel10,
  58   c_pcrel10,
  59   c_pcrel12,
  60   c_imm16s4,
  61   c_luimm16,
  62   c_imm16,
  63   c_huimm16,
  64   c_rimm16,
  65   c_imm16s2,
  66   c_uimm16s4,
  67   c_uimm16,
  68   c_pcrel24
  69 } const_forms_t;
  70
  71
  72 /* High-Nibble: group code, low nibble: register code.  */
  73
  74
  75 #define T_REG_R       0x00
  76 #define T_REG_P       0x10
  77 #define T_REG_I       0x20
  78 #define T_REG_B       0x30
  79 #define T_REG_L       0x34
  80 #define T_REG_M       0x24
  81 #define T_REG_A       0x40
  82
  83 /* All registers above this value don't
  84    belong to a usuable register group.  */
  85 #define T_NOGROUP     0xa0
  86
  87 /* Flags.  */
  88 #define F_REG_ALL    0x1000
  89 #define F_REG_HIGH   0x2000  /* Half register: high half.  */
  90
  91 enum machine_registers
  92 {
  93   REG_R0    = T_REG_R, REG_R1, REG_R2, REG_R3, REG_R4, REG_R5, REG_R6, REG_R7,
  94   REG_P0    = T_REG_P, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
  95   REG_I0    = T_REG_I, REG_I1, REG_I2, REG_I3,
  96   REG_M0    = T_REG_M, REG_M1, REG_M2, REG_M3,
  97   REG_B0    = T_REG_B, REG_B1, REG_B2, REG_B3,
  98   REG_L0    = T_REG_L, REG_L1, REG_L2, REG_L3,
  99   REG_A0x   = T_REG_A, REG_A0w, REG_A1x, REG_A1w,
 100   REG_ASTAT = 0x46,
 101   REG_RETS  = 0x47,
 102   REG_LC0   = 0x60, REG_LT0, REG_LB0,  REG_LC1, REG_LT1, REG_LB1,
 103               REG_CYCLES, REG_CYCLES2,
 104   REG_USP   = 0x70, REG_SEQSTAT, REG_SYSCFG,
 105               REG_RETI, REG_RETX, REG_RETN, REG_RETE, REG_EMUDAT,
 106
 107 /* These don't have groups.  */
 108   REG_sftreset = T_NOGROUP, REG_omode, REG_excause, REG_emucause,
 109                  REG_idle_req, REG_hwerrcause,
 110   REG_A0       = 0xc0, REG_A1, REG_CC,
 111 /* Pseudo registers, used only for distinction from symbols.  */
 112                  REG_RL0, REG_RL1, REG_RL2, REG_RL3,
 113                  REG_RL4, REG_RL5, REG_RL6, REG_RL7,
 114                  REG_RH0, REG_RH1, REG_RH2, REG_RH3,
 115                  REG_RH4, REG_RH5, REG_RH6, REG_RH7,
 116                  REG_LASTREG
 117 };
 118
 119 /* Status register flags.  */
 120
 121 enum statusflags
 122 {
 123   S_AZ = 0,
 124   S_AN,
 125   S_AQ = 6,
 126   S_AC0 = 12,
 127   S_AC1,
 128   S_AV0 = 16,
 129   S_AV0S,
 130   S_AV1,
 131   S_AV1S,
 132   S_V = 24,
 133   S_VS = 25
 134 };
 135
 136
 137 enum reg_class
 138 {
 139   rc_dregs_lo,
 140   rc_dregs_hi,
 141   rc_dregs,
 142   rc_dregs_pair,
 143   rc_pregs,
 144   rc_spfp,
 145   rc_dregs_hilo,
 146   rc_accum_ext,
 147   rc_accum_word,
 148   rc_accum,
 149   rc_iregs,
 150   rc_mregs,
 151   rc_bregs,
 152   rc_lregs,
 153   rc_dpregs,
 154   rc_gregs,
 155   rc_regs,
 156   rc_statbits,
 157   rc_ignore_bits,
 158   rc_ccstat,
 159   rc_counters,
 160   rc_dregs2_sysregs1,
 161   rc_open,
 162   rc_sysregs2,
 163   rc_sysregs3,
 164   rc_allregs,
 165   LIM_REG_CLASSES
 166 };
 167
 168 /* mmod field.  */
 169 #define M_S2RND 1
 170 #define M_T     2
 171 #define M_W32   3
 172 #define M_FU    4
 173 #define M_TFU   6
 174 #define M_IS    8
 175 #define M_ISS2  9
 176 #define M_IH    11
 177 #define M_IU    12
 178
 179 /* Register type checking macros.  */
 180
 181 #define CODE_MASK  0x07
 182 #define CLASS_MASK 0xf0
 183
 184 #define REG_SAME(a, b)   ((a).regno == (b).regno)
 185 #define REG_EQUAL(a, b)  (((a).regno & CODE_MASK) == ((b).regno & CODE_MASK))
 186 #define REG_CLASS(a)     ((a.regno) & 0xf0)
 187 #define IS_A1(a)         ((a).regno == REG_A1)
 188 #define IS_H(a)          ((a).regno & F_REG_HIGH ? 1: 0)
 189 #define IS_EVEN(r)       (r.regno % 2 == 0)
 190 #define IS_HCOMPL(a, b)  (REG_EQUAL(a, b) && \
 191                          ((a).regno & F_REG_HIGH) != ((b).regno & F_REG_HIGH))
 192
 193 /* register type checking.  */
 194 #define _TYPECHECK(r, x) (((r).regno & CLASS_MASK) == T_REG_##x)
 195
 196 #define IS_DREG(r)       _TYPECHECK(r, R)
 197 #define IS_DREG_H(r)     (_TYPECHECK(r, R) && IS_H(r))
 198 #define IS_DREG_L(r)     (_TYPECHECK(r, R) && !IS_H(r))
 199 #define IS_PREG(r)       _TYPECHECK(r, P)
 200 #define IS_IREG(r)       (((r).regno & 0xf4) == T_REG_I)
 201 #define IS_MREG(r)       (((r).regno & 0xf4) == T_REG_M)
 202 #define IS_BREG(r)       (((r).regno & 0xf4) == T_REG_B)
 203 #define IS_LREG(r)       (((r).regno & 0xf4) == T_REG_L)
 204 #define IS_CREG(r)       ((r).regno == REG_LC0 || (r).regno == REG_LC1)
 205 #define IS_ALLREG(r)     ((r).regno < T_NOGROUP)
 206
 207 /* Expression value macros.  */
 208
 209 typedef enum
 210 {
 211   ones_compl,
 212   twos_compl,
 213   mult,
 214   divide,
 215   mod,
 216   add,
 217   sub,
 218   lsh,
 219   rsh,
 220   logand,
 221   logior,
 222   logxor
 223 } expr_opcodes_t;
 224
 225 struct expressionS;
 226
 227 #define SYMBOL_T       symbolS*
 228
 229 struct expression_cell
 230 {
 231   int value;
 232   SYMBOL_T symbol;
 233 };
 234
 235 /* User Type Definitions.  */
 236 struct bfin_insn
 237 {
 238   unsigned long value;
 239   struct bfin_insn *next;
 240   struct expression_cell *exp;
 241   int pcrel;
 242   int reloc;
 243 };
 244
 245 #define INSTR_T struct bfin_insn*
 246 #define EXPR_T  struct expression_cell*
 247
 248 typedef struct expr_node_struct Expr_Node;
 249
 250 extern INSTR_T gencode (unsigned long x);
 251 extern INSTR_T conscode (INSTR_T head, INSTR_T tail);
 252 extern INSTR_T conctcode (INSTR_T head, INSTR_T tail);
 253 extern INSTR_T note_reloc
 254        (INSTR_T code, Expr_Node *, int reloc,int pcrel);
 255 extern INSTR_T note_reloc1
 256        (INSTR_T code, const char * sym, int reloc, int pcrel);
 257 extern INSTR_T note_reloc2
 258        (INSTR_T code, const char *symbol, int reloc, int value, int pcrel);
 259
 260 /* Types of expressions.  */
 261 typedef enum
 262 {
 263   Expr_Node_Binop,              /* Binary operator.  */
 264   Expr_Node_Unop,               /* Unary operator.  */
 265   Expr_Node_Reloc,              /* Symbol to be relocated.  */
 266   Expr_Node_Constant            /* Constant.  */
 267 } Expr_Node_Type;
 268
 269 /* Types of operators.  */
 270 typedef enum
 271 {
 272   Expr_Op_Type_Add,
 273   Expr_Op_Type_Sub,
 274   Expr_Op_Type_Mult,
 275   Expr_Op_Type_Div,
 276   Expr_Op_Type_Mod,
 277   Expr_Op_Type_Lshift,
 278   Expr_Op_Type_Rshift,
 279   Expr_Op_Type_BAND,            /* Bitwise AND.  */
 280   Expr_Op_Type_BOR,             /* Bitwise OR.  */
 281   Expr_Op_Type_BXOR,            /* Bitwise exclusive OR.  */
 282   Expr_Op_Type_LAND,            /* Logical AND.  */
 283   Expr_Op_Type_LOR,             /* Logical OR.  */
 284   Expr_Op_Type_NEG,
 285   Expr_Op_Type_COMP             /* Complement.  */
 286 } Expr_Op_Type;
 287
 288 /* The value that can be stored ... depends on type.  */
 289 typedef union
 290 {
 291   const char *s_value;          /* if relocation symbol, the text.  */
 292   int i_value;                  /* if constant, the value.  */
 293   Expr_Op_Type op_value;        /* if operator, the value.  */
 294 } Expr_Node_Value;
 295
 296 /* The expression node.  */
 297 struct expr_node_struct
 298 {
 299   Expr_Node_Type        type;
 300   Expr_Node_Value       value;
 301   Expr_Node             *Left_Child;
 302   Expr_Node             *Right_Child;
 303 };
 304
 305
 306 /* Operations on the expression node.  */
 307 Expr_Node *Expr_Node_Create (Expr_Node_Type type,
 308                          Expr_Node_Value value,
 309                          Expr_Node *Left_Child,
 310                          Expr_Node *Right_Child);
 311
 312 /* Generate the reloc structure as a series of instructions.  */
 313 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
 314
 315 #define MKREF(x)        mkexpr (0,x)
 316 #define ALLOCATE(x)     malloc (x)
 317
 318 #define NULL_CODE ((INSTR_T) 0)
 319
 320 #ifndef EXPR_VALUE
 321 #define EXPR_VALUE(x)  (((x)->type == Expr_Node_Constant) ? ((x)->value.i_value) : 0)
 322 #endif
 323 #ifndef EXPR_SYMBOL
 324 #define EXPR_SYMBOL(x) ((x)->symbol)
 325 #endif
 326
 327
 328 typedef long reg_t;
 329
 330
 331 typedef struct _register
 332 {
 333   reg_t regno;       /* Register ID as defined in machine_registers.  */
 334   int   flags;
 335 } Register;
 336
 337
 338 typedef struct _macfunc
 339 {
 340   char n;
 341   char op;
 342   char w;
 343   char P;
 344   Register dst;
 345   Register s0;
 346   Register s1;
 347 } Macfunc;
 348
 349 typedef struct _opt_mode
 350 {
 351   int MM;
 352   int mod;
 353 } Opt_mode;
 354
 355 typedef enum
 356 {
 357   SEMANTIC_ERROR,
 358   NO_INSN_GENERATED,
 359   INSN_GENERATED
 360 } parse_state;
 361
 362
 363 #ifdef __cplusplus
 364 extern "C" {
 365 #endif
 366
 367 extern int debug_codeselection;
 368
 369 void error (char *format, ...);
 370 void warn (char *format, ...);
 371 int  semantic_error (char *syntax);
 372 void semantic_error_2 (char *syntax);
 373
 374 EXPR_T mkexpr (int, SYMBOL_T);
 375
 376 extern void bfin_equals (Expr_Node *sym);
 377 /* Defined in bfin-lex.l.  */
 378 void set_start_state (void);
 379
 380 #ifdef __cplusplus
 381 }
 382 #endif
 383
 384 #endif  /* BFIN_PARSE_H */
 385