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_NONE 0
  86 #define F_REG_HIGH 1
  87 #define F_REG_LOW 2
  88
  89 enum machine_registers
  90 {
  91   REG_R0    = T_REG_R, REG_R1, REG_R2, REG_R3, REG_R4, REG_R5, REG_R6, REG_R7,
  92   REG_P0    = T_REG_P, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
  93   REG_I0    = T_REG_I, REG_I1, REG_I2, REG_I3,
  94   REG_M0    = T_REG_M, REG_M1, REG_M2, REG_M3,
  95   REG_B0    = T_REG_B, REG_B1, REG_B2, REG_B3,
  96   REG_L0    = T_REG_L, REG_L1, REG_L2, REG_L3,
  97   REG_A0x   = T_REG_A, REG_A0w, REG_A1x, REG_A1w,
  98   REG_ASTAT = 0x46,
  99   REG_RETS  = 0x47,
 100   REG_LC0   = 0x60, REG_LT0, REG_LB0,  REG_LC1, REG_LT1, REG_LB1,
 101               REG_CYCLES, REG_CYCLES2,
 102   REG_USP   = 0x70, REG_SEQSTAT, REG_SYSCFG,
 103               REG_RETI, REG_RETX, REG_RETN, REG_RETE, REG_EMUDAT,
 104
 105 /* These don't have groups.  */
 106   REG_sftreset = T_NOGROUP, REG_omode, REG_excause, REG_emucause,
 107                  REG_idle_req, REG_hwerrcause,
 108   REG_A0       = 0xc0, REG_A1, REG_CC,
 109 /* Pseudo registers, used only for distinction from symbols.  */
 110                  REG_RL0, REG_RL1, REG_RL2, REG_RL3,
 111                  REG_RL4, REG_RL5, REG_RL6, REG_RL7,
 112                  REG_RH0, REG_RH1, REG_RH2, REG_RH3,
 113                  REG_RH4, REG_RH5, REG_RH6, REG_RH7,
 114                  REG_LASTREG
 115 };
 116
 117 /* Status register flags.  */
 118
 119 enum statusflags
 120 {
 121   S_AZ = 0,
 122   S_AN,
 123   S_AQ = 6,
 124   S_AC0 = 12,
 125   S_AC1,
 126   S_AV0 = 16,
 127   S_AV0S,
 128   S_AV1,
 129   S_AV1S,
 130   S_V = 24,
 131   S_VS = 25
 132 };
 133
 134
 135 enum reg_class
 136 {
 137   rc_dregs_lo,
 138   rc_dregs_hi,
 139   rc_dregs,
 140   rc_dregs_pair,
 141   rc_pregs,
 142   rc_spfp,
 143   rc_dregs_hilo,
 144   rc_accum_ext,
 145   rc_accum_word,
 146   rc_accum,
 147   rc_iregs,
 148   rc_mregs,
 149   rc_bregs,
 150   rc_lregs,
 151   rc_dpregs,
 152   rc_gregs,
 153   rc_regs,
 154   rc_statbits,
 155   rc_ignore_bits,
 156   rc_ccstat,
 157   rc_counters,
 158   rc_dregs2_sysregs1,
 159   rc_open,
 160   rc_sysregs2,
 161   rc_sysregs3,
 162   rc_allregs,
 163   LIM_REG_CLASSES
 164 };
 165
 166 /* mmod field.  */
 167 #define M_S2RND 1
 168 #define M_T     2
 169 #define M_W32   3
 170 #define M_FU    4
 171 #define M_TFU   6
 172 #define M_IS    8
 173 #define M_ISS2  9
 174 #define M_IH    11
 175 #define M_IU    12
 176
 177 /* Register type checking macros.  */
 178
 179 #define CODE_MASK  0x07
 180 #define CLASS_MASK 0xf0
 181
 182 #define REG_SAME(a, b)   ((a).regno == (b).regno)
 183 #define REG_EQUAL(a, b)  (((a).regno & CODE_MASK) == ((b).regno & CODE_MASK))
 184 #define REG_CLASS(a)     ((a).regno & 0xf0)
 185 #define IS_A1(a)         ((a).regno == REG_A1)
 186 #define IS_H(a)          ((a).flags & F_REG_HIGH ? 1: 0)
 187 #define IS_EVEN(r)       ((r).regno % 2 == 0)
 188 #define IS_HCOMPL(a, b)  (REG_EQUAL(a, b) && \
 189                          ((a).flags & F_REG_HIGH) != ((b).flags & F_REG_HIGH))
 190
 191 /* register type checking.  */
 192 #define _TYPECHECK(r, x) (((r).regno & CLASS_MASK) == T_REG_##x)
 193
 194 #define IS_DREG(r)       _TYPECHECK(r, R)
 195 #define IS_DREG_H(r)     (_TYPECHECK(r, R) && IS_H(r))
 196 #define IS_DREG_L(r)     (_TYPECHECK(r, R) && !IS_H(r))
 197 #define IS_PREG(r)       _TYPECHECK(r, P)
 198 #define IS_IREG(r)       (((r).regno & 0xf4) == T_REG_I)
 199 #define IS_MREG(r)       (((r).regno & 0xf4) == T_REG_M)
 200 #define IS_BREG(r)       (((r).regno & 0xf4) == T_REG_B)
 201 #define IS_LREG(r)       (((r).regno & 0xf4) == T_REG_L)
 202 #define IS_CREG(r)       ((r).regno == REG_LC0 || (r).regno == REG_LC1)
 203 #define IS_ALLREG(r)     ((r).regno < T_NOGROUP)
 204
 205 #define IS_GENREG(r) \
 206   (IS_DREG (r) || IS_PREG (r)                           \
 207    || (r).regno == REG_A0x || (r).regno == REG_A0w      \
 208    || (r).regno == REG_A1x || (r).regno == REG_A1w)
 209
 210 #define IS_DAGREG(r) \
 211   (IS_IREG (r) || IS_MREG (r) || IS_BREG (r) || IS_LREG (r))
 212
 213 #define IS_SYSREG(r) \
 214   ((r).regno == REG_ASTAT || (r).regno == REG_SEQSTAT           \
 215    || (r).regno == REG_SYSCFG || (r).regno == REG_RETI          \
 216    || (r).regno == REG_RETX || (r).regno == REG_RETN            \
 217    || (r).regno == REG_RETE || (r).regno == REG_RETS            \
 218    || (r).regno == REG_LC0 || (r).regno == REG_LC1              \
 219    || (r).regno == REG_LT0 || (r).regno == REG_LT1              \
 220    || (r).regno == REG_LB0 || (r).regno == REG_LB1              \
 221    || (r).regno == REG_CYCLES || (r).regno == REG_CYCLES2       \
 222    || (r).regno == REG_EMUDAT)
 223
 224 /* Expression value macros.  */
 225
 226 typedef enum
 227 {
 228   ones_compl,
 229   twos_compl,
 230   mult,
 231   divide,
 232   mod,
 233   add,
 234   sub,
 235   lsh,
 236   rsh,
 237   logand,
 238   logior,
 239   logxor
 240 } expr_opcodes_t;
 241
 242 struct expressionS;
 243
 244 #define SYMBOL_T       symbolS*
 245
 246 struct expression_cell
 247 {
 248   int value;
 249   SYMBOL_T symbol;
 250 };
 251
 252 /* User Type Definitions.  */
 253 struct bfin_insn
 254 {
 255   unsigned long value;
 256   struct bfin_insn *next;
 257   struct expression_cell *exp;
 258   int pcrel;
 259   int reloc;
 260 };
 261
 262 #define INSTR_T struct bfin_insn*
 263 #define EXPR_T  struct expression_cell*
 264
 265 typedef struct expr_node_struct Expr_Node;
 266
 267 extern INSTR_T gencode (unsigned long x);
 268 extern INSTR_T conscode (INSTR_T head, INSTR_T tail);
 269 extern INSTR_T conctcode (INSTR_T head, INSTR_T tail);
 270 extern INSTR_T note_reloc
 271        (INSTR_T code, Expr_Node *, int reloc,int pcrel);
 272 extern INSTR_T note_reloc1
 273        (INSTR_T code, const char * sym, int reloc, int pcrel);
 274 extern INSTR_T note_reloc2
 275        (INSTR_T code, const char *symbol, int reloc, int value, int pcrel);
 276
 277 /* Types of expressions.  */
 278 typedef enum
 279 {
 280   Expr_Node_Binop,              /* Binary operator.  */
 281   Expr_Node_Unop,               /* Unary operator.  */
 282   Expr_Node_Reloc,              /* Symbol to be relocated.  */
 283   Expr_Node_GOT_Reloc,          /* Symbol to be relocated using the GOT.  */
 284   Expr_Node_Constant            /* Constant.  */
 285 } Expr_Node_Type;
 286
 287 /* Types of operators.  */
 288 typedef enum
 289 {
 290   Expr_Op_Type_Add,
 291   Expr_Op_Type_Sub,
 292   Expr_Op_Type_Mult,
 293   Expr_Op_Type_Div,
 294   Expr_Op_Type_Mod,
 295   Expr_Op_Type_Lshift,
 296   Expr_Op_Type_Rshift,
 297   Expr_Op_Type_BAND,            /* Bitwise AND.  */
 298   Expr_Op_Type_BOR,             /* Bitwise OR.  */
 299   Expr_Op_Type_BXOR,            /* Bitwise exclusive OR.  */
 300   Expr_Op_Type_LAND,            /* Logical AND.  */
 301   Expr_Op_Type_LOR,             /* Logical OR.  */
 302   Expr_Op_Type_NEG,
 303   Expr_Op_Type_COMP             /* Complement.  */
 304 } Expr_Op_Type;
 305
 306 /* The value that can be stored ... depends on type.  */
 307 typedef union
 308 {
 309   const char *s_value;          /* if relocation symbol, the text.  */
 310   long long i_value;            /* if constant, the value.  */
 311   Expr_Op_Type op_value;        /* if operator, the value.  */
 312 } Expr_Node_Value;
 313
 314 /* The expression node.  */
 315 struct expr_node_struct
 316 {
 317   Expr_Node_Type        type;
 318   Expr_Node_Value       value;
 319   Expr_Node             *Left_Child;
 320   Expr_Node             *Right_Child;
 321 };
 322
 323
 324 /* Operations on the expression node.  */
 325 Expr_Node *Expr_Node_Create (Expr_Node_Type type,
 326                          Expr_Node_Value value,
 327                          Expr_Node *Left_Child,
 328                          Expr_Node *Right_Child);
 329
 330 /* Generate the reloc structure as a series of instructions.  */
 331 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
 332
 333 #define MKREF(x)        mkexpr (0,x)
 334 #define ALLOCATE(x)     malloc (x)
 335
 336 #define NULL_CODE ((INSTR_T) 0)
 337
 338 #ifndef EXPR_VALUE
 339 #define EXPR_VALUE(x)  (((x)->type == Expr_Node_Constant) ? ((x)->value.i_value) : 0)
 340 #endif
 341 #ifndef EXPR_SYMBOL
 342 #define EXPR_SYMBOL(x) ((x)->symbol)
 343 #endif
 344
 345
 346 typedef long reg_t;
 347
 348
 349 typedef struct _register
 350 {
 351   reg_t regno;       /* Register ID as defined in machine_registers.  */
 352   int   flags;
 353 } Register;
 354
 355
 356 typedef struct _macfunc
 357 {
 358   char n;
 359   char op;
 360   char w;
 361   char P;
 362   Register dst;
 363   Register s0;
 364   Register s1;
 365 } Macfunc;
 366
 367 typedef struct _opt_mode
 368 {
 369   int MM;
 370   int mod;
 371 } Opt_mode;
 372
 373 typedef enum
 374 {
 375   SEMANTIC_ERROR,
 376   NO_INSN_GENERATED,
 377   INSN_GENERATED
 378 } parse_state;
 379
 380
 381 #ifdef __cplusplus
 382 extern "C" {
 383 #endif
 384
 385 extern int debug_codeselection;
 386
 387 void error (char *format, ...);
 388 void warn (char *format, ...);
 389 int  semantic_error (char *syntax);
 390 void semantic_error_2 (char *syntax);
 391
 392 EXPR_T mkexpr (int, SYMBOL_T);
 393
 394 /* Defined in bfin-lex.l.  */
 395 void set_start_state (void);
 396
 397 extern int insn_regmask (int, int);
 398 #ifdef __cplusplus
 399 }
 400 #endif
 401
 402 #endif  /* BFIN_PARSE_H */
 403