gas/config/bfin-defs.h

   1 /* bfin-defs.h ADI Blackfin gas header file
   2    Copyright 2005, 2006, 2007, 2009
   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 3, 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 #define PCREL   1
  26 #define CODE_FRAG_SIZE 4096  /* 1 page.  */
  27
  28
  29 /* Definition for all status bits.  */
  30 typedef enum
  31 {
  32   c_0,
  33   c_1,
  34   c_4,
  35   c_2,
  36   c_uimm2,
  37   c_uimm3,
  38   c_imm3,
  39   c_pcrel4,
  40   c_imm4,
  41   c_uimm4s4,
  42   c_uimm4,
  43   c_uimm4s2,
  44   c_negimm5s4,
  45   c_imm5,
  46   c_uimm5,
  47   c_imm6,
  48   c_imm7,
  49   c_imm8,
  50   c_uimm8,
  51   c_pcrel8,
  52   c_uimm8s4,
  53   c_pcrel8s4,
  54   c_lppcrel10,
  55   c_pcrel10,
  56   c_pcrel12,
  57   c_imm16s4,
  58   c_luimm16,
  59   c_imm16,
  60   c_huimm16,
  61   c_rimm16,
  62   c_imm16s2,
  63   c_uimm16s4,
  64   c_uimm16,
  65   c_pcrel24
  66 } const_forms_t;
  67
  68
  69 /* High-Nibble: group code, low nibble: register code.  */
  70
  71
  72 #define T_REG_R       0x00
  73 #define T_REG_P       0x10
  74 #define T_REG_I       0x20
  75 #define T_REG_B       0x30
  76 #define T_REG_L       0x34
  77 #define T_REG_M       0x24
  78 #define T_REG_A       0x40
  79
  80 /* All registers above this value don't
  81    belong to a usuable register group.  */
  82 #define T_NOGROUP     0xa0
  83
  84 /* Flags.  */
  85 #define F_REG_ALL    0x1000
  86 #define F_REG_HIGH   0x2000  /* Half register: high half.  */
  87
  88 enum machine_registers
  89 {
  90   REG_R0    = T_REG_R, REG_R1, REG_R2, REG_R3, REG_R4, REG_R5, REG_R6, REG_R7,
  91   REG_P0    = T_REG_P, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
  92   REG_I0    = T_REG_I, REG_I1, REG_I2, REG_I3,
  93   REG_M0    = T_REG_M, REG_M1, REG_M2, REG_M3,
  94   REG_B0    = T_REG_B, REG_B1, REG_B2, REG_B3,
  95   REG_L0    = T_REG_L, REG_L1, REG_L2, REG_L3,
  96   REG_A0x   = T_REG_A, REG_A0w, REG_A1x, REG_A1w,
  97   REG_ASTAT = 0x46,
  98   REG_RETS  = 0x47,
  99   REG_LC0   = 0x60, REG_LT0, REG_LB0,  REG_LC1, REG_LT1, REG_LB1,
 100               REG_CYCLES, REG_CYCLES2,
 101   REG_USP   = 0x70, REG_SEQSTAT, REG_SYSCFG,
 102               REG_RETI, REG_RETX, REG_RETN, REG_RETE, REG_EMUDAT,
 103
 104 /* These don't have groups.  */
 105   REG_sftreset = T_NOGROUP, REG_omode, REG_excause, REG_emucause,
 106                  REG_idle_req, REG_hwerrcause,
 107   REG_A0       = 0xc0, REG_A1, REG_CC,
 108 /* Pseudo registers, used only for distinction from symbols.  */
 109                  REG_RL0, REG_RL1, REG_RL2, REG_RL3,
 110                  REG_RL4, REG_RL5, REG_RL6, REG_RL7,
 111                  REG_RH0, REG_RH1, REG_RH2, REG_RH3,
 112                  REG_RH4, REG_RH5, REG_RH6, REG_RH7,
 113                  REG_LASTREG
 114 };
 115
 116 /* Status register flags.  */
 117
 118 enum statusflags
 119 {
 120   S_AZ = 0,
 121   S_AN,
 122   S_AQ = 6,
 123   S_AC0 = 12,
 124   S_AC1,
 125   S_AV0 = 16,
 126   S_AV0S,
 127   S_AV1,
 128   S_AV1S,
 129   S_V = 24,
 130   S_VS = 25
 131 };
 132
 133
 134 enum reg_class
 135 {
 136   rc_dregs_lo,
 137   rc_dregs_hi,
 138   rc_dregs,
 139   rc_dregs_pair,
 140   rc_pregs,
 141   rc_spfp,
 142   rc_dregs_hilo,
 143   rc_accum_ext,
 144   rc_accum_word,
 145   rc_accum,
 146   rc_iregs,
 147   rc_mregs,
 148   rc_bregs,
 149   rc_lregs,
 150   rc_dpregs,
 151   rc_gregs,
 152   rc_regs,
 153   rc_statbits,
 154   rc_ignore_bits,
 155   rc_ccstat,
 156   rc_counters,
 157   rc_dregs2_sysregs1,
 158   rc_open,
 159   rc_sysregs2,
 160   rc_sysregs3,
 161   rc_allregs,
 162   LIM_REG_CLASSES
 163 };
 164
 165 /* mmod field.  */
 166 #define M_S2RND 1
 167 #define M_T     2
 168 #define M_W32   3
 169 #define M_FU    4
 170 #define M_TFU   6
 171 #define M_IS    8
 172 #define M_ISS2  9
 173 #define M_IH    11
 174 #define M_IU    12
 175
 176 /* Register type checking macros.  */
 177
 178 #define CODE_MASK  0x07
 179 #define CLASS_MASK 0xf0
 180
 181 #define REG_SAME(a, b)   ((a).regno == (b).regno)
 182 #define REG_EQUAL(a, b)  (((a).regno & CODE_MASK) == ((b).regno & CODE_MASK))
 183 #define REG_CLASS(a)     ((a.regno) & 0xf0)
 184 #define IS_A1(a)         ((a).regno == REG_A1)
 185 #define IS_H(a)          ((a).regno & F_REG_HIGH ? 1: 0)
 186 #define IS_EVEN(r)       (r.regno % 2 == 0)
 187 #define IS_HCOMPL(a, b)  (REG_EQUAL(a, b) && \
 188                          ((a).regno & F_REG_HIGH) != ((b).regno & F_REG_HIGH))
 189
 190 /* register type checking.  */
 191 #define _TYPECHECK(r, x) (((r).regno & CLASS_MASK) == T_REG_##x)
 192
 193 #define IS_DREG(r)       _TYPECHECK(r, R)
 194 #define IS_DREG_H(r)     (_TYPECHECK(r, R) && IS_H(r))
 195 #define IS_DREG_L(r)     (_TYPECHECK(r, R) && !IS_H(r))
 196 #define IS_PREG(r)       _TYPECHECK(r, P)
 197 #define IS_IREG(r)       (((r).regno & 0xf4) == T_REG_I)
 198 #define IS_MREG(r)       (((r).regno & 0xf4) == T_REG_M)
 199 #define IS_BREG(r)       (((r).regno & 0xf4) == T_REG_B)
 200 #define IS_LREG(r)       (((r).regno & 0xf4) == T_REG_L)
 201 #define IS_CREG(r)       ((r).regno == REG_LC0 || (r).regno == REG_LC1)
 202 #define IS_ALLREG(r)     ((r).regno < T_NOGROUP)
 203
 204 #define IS_GENREG(r) \
 205   (IS_DREG (r) || IS_PREG (r)                           \
 206    || (r).regno == REG_A0x || (r).regno == REG_A0w      \
 207    || (r).regno == REG_A1x || (r).regno == REG_A1w)
 208
 209 #define IS_DAGREG(r) \
 210   (IS_IREG (r) || IS_MREG (r) || IS_BREG (r) || IS_LREG (r))
 211
 212 #define IS_SYSREG(r) \
 213   ((r).regno == REG_ASTAT || (r).regno == REG_SEQSTAT           \
 214    || (r).regno == REG_SYSCFG || (r).regno == REG_RETI          \
 215    || (r).regno == REG_RETX || (r).regno == REG_RETN            \
 216    || (r).regno == REG_RETE || (r).regno == REG_RETS            \
 217    || (r).regno == REG_LC0 || (r).regno == REG_LC1              \
 218    || (r).regno == REG_LT0 || (r).regno == REG_LT1              \
 219    || (r).regno == REG_LB0 || (r).regno == REG_LB1              \
 220    || (r).regno == REG_CYCLES || (r).regno == REG_CYCLES2       \
 221    || (r).regno == REG_EMUDAT)
 222
 223 /* Expression value macros.  */
 224
 225 typedef enum
 226 {
 227   ones_compl,
 228   twos_compl,
 229   mult,
 230   divide,
 231   mod,
 232   add,
 233   sub,
 234   lsh,
 235   rsh,
 236   logand,
 237   logior,
 238   logxor
 239 } expr_opcodes_t;
 240
 241 struct expressionS;
 242
 243 #define SYMBOL_T       symbolS*
 244
 245 struct expression_cell
 246 {
 247   int value;
 248   SYMBOL_T symbol;
 249 };
 250
 251 /* User Type Definitions.  */
 252 struct bfin_insn
 253 {
 254   unsigned long value;
 255   struct bfin_insn *next;
 256   struct expression_cell *exp;
 257   int pcrel;
 258   int reloc;
 259 };
 260
 261 #define INSTR_T struct bfin_insn*
 262 #define EXPR_T  struct expression_cell*
 263
 264 typedef struct expr_node_struct Expr_Node;
 265
 266 extern INSTR_T gencode (unsigned long x);
 267 extern INSTR_T conscode (INSTR_T head, INSTR_T tail);
 268 extern INSTR_T conctcode (INSTR_T head, INSTR_T tail);
 269 extern INSTR_T note_reloc
 270        (INSTR_T code, Expr_Node *, int reloc,int pcrel);
 271 extern INSTR_T note_reloc1
 272        (INSTR_T code, const char * sym, int reloc, int pcrel);
 273 extern INSTR_T note_reloc2
 274        (INSTR_T code, const char *symbol, int reloc, int value, int pcrel);
 275
 276 /* Types of expressions.  */
 277 typedef enum
 278 {
 279   Expr_Node_Binop,              /* Binary operator.  */
 280   Expr_Node_Unop,               /* Unary operator.  */
 281   Expr_Node_Reloc,              /* Symbol to be relocated.  */
 282   Expr_Node_GOT_Reloc,          /* Symbol to be relocated using the GOT.  */
 283   Expr_Node_Constant            /* Constant.  */
 284 } Expr_Node_Type;
 285
 286 /* Types of operators.  */
 287 typedef enum
 288 {
 289   Expr_Op_Type_Add,
 290   Expr_Op_Type_Sub,
 291   Expr_Op_Type_Mult,
 292   Expr_Op_Type_Div,
 293   Expr_Op_Type_Mod,
 294   Expr_Op_Type_Lshift,
 295   Expr_Op_Type_Rshift,
 296   Expr_Op_Type_BAND,            /* Bitwise AND.  */
 297   Expr_Op_Type_BOR,             /* Bitwise OR.  */
 298   Expr_Op_Type_BXOR,            /* Bitwise exclusive OR.  */
 299   Expr_Op_Type_LAND,            /* Logical AND.  */
 300   Expr_Op_Type_LOR,             /* Logical OR.  */
 301   Expr_Op_Type_NEG,
 302   Expr_Op_Type_COMP             /* Complement.  */
 303 } Expr_Op_Type;
 304
 305 /* The value that can be stored ... depends on type.  */
 306 typedef union
 307 {
 308   const char *s_value;          /* if relocation symbol, the text.  */
 309   long long i_value;            /* if constant, the value.  */
 310   Expr_Op_Type op_value;        /* if operator, the value.  */
 311 } Expr_Node_Value;
 312
 313 /* The expression node.  */
 314 struct expr_node_struct
 315 {
 316   Expr_Node_Type        type;
 317   Expr_Node_Value       value;
 318   Expr_Node             *Left_Child;
 319   Expr_Node             *Right_Child;
 320 };
 321
 322
 323 /* Operations on the expression node.  */
 324 Expr_Node *Expr_Node_Create (Expr_Node_Type type,
 325                          Expr_Node_Value value,
 326                          Expr_Node *Left_Child,
 327                          Expr_Node *Right_Child);
 328
 329 /* Generate the reloc structure as a series of instructions.  */
 330 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
 331
 332 #define MKREF(x)        mkexpr (0,x)
 333 #define ALLOCATE(x)     malloc (x)
 334
 335 #define NULL_CODE ((INSTR_T) 0)
 336
 337 #ifndef EXPR_VALUE
 338 #define EXPR_VALUE(x)  (((x)->type == Expr_Node_Constant) ? ((x)->value.i_value) : 0)
 339 #endif
 340 #ifndef EXPR_SYMBOL
 341 #define EXPR_SYMBOL(x) ((x)->symbol)
 342 #endif
 343
 344
 345 typedef long reg_t;
 346
 347
 348 typedef struct _register
 349 {
 350   reg_t regno;       /* Register ID as defined in machine_registers.  */
 351   int   flags;
 352 } Register;
 353
 354
 355 typedef struct _macfunc
 356 {
 357   char n;
 358   char op;
 359   char w;
 360   char P;
 361   Register dst;
 362   Register s0;
 363   Register s1;
 364 } Macfunc;
 365
 366 typedef struct _opt_mode
 367 {
 368   int MM;
 369   int mod;
 370 } Opt_mode;
 371
 372 typedef enum
 373 {
 374   SEMANTIC_ERROR,
 375   NO_INSN_GENERATED,
 376   INSN_GENERATED
 377 } parse_state;
 378
 379
 380 #ifdef __cplusplus
 381 extern "C" {
 382 #endif
 383
 384 extern int debug_codeselection;
 385
 386 void error (char *format, ...);
 387 void warn (char *format, ...);
 388 int  semantic_error (char *syntax);
 389 void semantic_error_2 (char *syntax);
 390
 391 EXPR_T mkexpr (int, SYMBOL_T);
 392
 393 /* Defined in bfin-lex.l.  */
 394 void set_start_state (void);
 395
 396 extern int insn_regmask (int, int);
 397 #ifdef __cplusplus
 398 }
 399 #endif
 400
 401 #endif  /* BFIN_PARSE_H */
 402