gas/config/bfin-defs.h

   1 /* bfin-defs.h ADI Blackfin gas header file
   2    Copyright 2005, 2006, 2007, 2009, 2010, 2011
   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 #include "opcode/bfin.h"
  26
  27 #define PCREL   1
  28 #define CODE_FRAG_SIZE 4096  /* 1 page.  */
  29
  30
  31 /* Definition for all status bits.  */
  32 typedef enum
  33 {
  34   c_0,
  35   c_1,
  36   c_4,
  37   c_2,
  38   c_uimm2,
  39   c_uimm3,
  40   c_imm3,
  41   c_pcrel4,
  42   c_imm4,
  43   c_uimm4s4,
  44   c_uimm4,
  45   c_uimm4s2,
  46   c_negimm5s4,
  47   c_imm5,
  48   c_uimm5,
  49   c_imm6,
  50   c_imm7,
  51   c_imm8,
  52   c_uimm8,
  53   c_pcrel8,
  54   c_uimm8s4,
  55   c_pcrel8s4,
  56   c_lppcrel10,
  57   c_pcrel10,
  58   c_pcrel12,
  59   c_imm16s4,
  60   c_luimm16,
  61   c_imm16,
  62   c_huimm16,
  63   c_rimm16,
  64   c_imm16s2,
  65   c_uimm16s4,
  66   c_uimm16,
  67   c_pcrel24
  68 } const_forms_t;
  69
  70
  71 /* High-Nibble: group code, low nibble: register code.  */
  72
  73
  74 #define T_REG_R       0x00
  75 #define T_REG_P       0x10
  76 #define T_REG_I       0x20
  77 #define T_REG_B       0x30
  78 #define T_REG_L       0x34
  79 #define T_REG_M       0x24
  80 #define T_REG_A       0x40
  81
  82 /* All registers above this value don't
  83    belong to a usuable register group.  */
  84 #define T_NOGROUP     0xa0
  85
  86 /* Flags.  */
  87 #define F_REG_NONE 0
  88 #define F_REG_HIGH 1
  89 #define F_REG_LOW 2
  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_AC0_COPY,
 126   S_V_COPY,
 127   S_AQ = 6,
 128   S_RND_MOD = 8,
 129   S_AC0 = 12,
 130   S_AC1,
 131   S_AV0 = 16,
 132   S_AV0S,
 133   S_AV1,
 134   S_AV1S,
 135   S_V = 24,
 136   S_VS = 25
 137 };
 138
 139
 140 enum reg_class
 141 {
 142   rc_dregs_lo,
 143   rc_dregs_hi,
 144   rc_dregs,
 145   rc_dregs_pair,
 146   rc_pregs,
 147   rc_spfp,
 148   rc_dregs_hilo,
 149   rc_accum_ext,
 150   rc_accum_word,
 151   rc_accum,
 152   rc_iregs,
 153   rc_mregs,
 154   rc_bregs,
 155   rc_lregs,
 156   rc_dpregs,
 157   rc_gregs,
 158   rc_regs,
 159   rc_statbits,
 160   rc_ignore_bits,
 161   rc_ccstat,
 162   rc_counters,
 163   rc_dregs2_sysregs1,
 164   rc_open,
 165   rc_sysregs2,
 166   rc_sysregs3,
 167   rc_allregs,
 168   LIM_REG_CLASSES
 169 };
 170
 171 /* Register type checking macros.  */
 172
 173 #define CODE_MASK  0x07
 174 #define CLASS_MASK 0xf0
 175
 176 #define REG_SAME(a, b)   ((a).regno == (b).regno)
 177 #define REG_EQUAL(a, b)  (((a).regno & CODE_MASK) == ((b).regno & CODE_MASK))
 178 #define REG_CLASS(a)     ((a).regno & 0xf0)
 179 #define IS_A1(a)         ((a).regno == REG_A1)
 180 #define IS_H(a)          ((a).flags & F_REG_HIGH ? 1: 0)
 181 #define IS_EVEN(r)       ((r).regno % 2 == 0)
 182 #define IS_HCOMPL(a, b)  (REG_EQUAL(a, b) && \
 183                          ((a).flags & F_REG_HIGH) != ((b).flags & F_REG_HIGH))
 184
 185 /* register type checking.  */
 186 #define _TYPECHECK(r, x) (((r).regno & CLASS_MASK) == T_REG_##x)
 187
 188 #define IS_DREG(r)       _TYPECHECK(r, R)
 189 #define IS_DREG_H(r)     (_TYPECHECK(r, R) && IS_H(r))
 190 #define IS_DREG_L(r)     (_TYPECHECK(r, R) && !IS_H(r))
 191 #define IS_PREG(r)       _TYPECHECK(r, P)
 192 #define IS_IREG(r)       (((r).regno & 0xf4) == T_REG_I)
 193 #define IS_MREG(r)       (((r).regno & 0xf4) == T_REG_M)
 194 #define IS_BREG(r)       (((r).regno & 0xf4) == T_REG_B)
 195 #define IS_LREG(r)       (((r).regno & 0xf4) == T_REG_L)
 196 #define IS_CREG(r)       ((r).regno == REG_LC0 || (r).regno == REG_LC1)
 197 #define IS_EMUDAT(r)     ((r).regno == REG_EMUDAT)
 198 #define IS_ALLREG(r)     ((r).regno < T_NOGROUP)
 199
 200 #define IS_GENREG(r) \
 201   (IS_DREG (r) || IS_PREG (r)                           \
 202    || (r).regno == REG_A0x || (r).regno == REG_A0w      \
 203    || (r).regno == REG_A1x || (r).regno == REG_A1w)
 204
 205 #define IS_DAGREG(r) \
 206   (IS_IREG (r) || IS_MREG (r) || IS_BREG (r) || IS_LREG (r))
 207
 208 #define IS_SYSREG(r) \
 209   ((r).regno == REG_ASTAT || (r).regno == REG_SEQSTAT           \
 210    || (r).regno == REG_SYSCFG || (r).regno == REG_RETI          \
 211    || (r).regno == REG_RETX || (r).regno == REG_RETN            \
 212    || (r).regno == REG_RETE || (r).regno == REG_RETS            \
 213    || (r).regno == REG_LC0 || (r).regno == REG_LC1              \
 214    || (r).regno == REG_LT0 || (r).regno == REG_LT1              \
 215    || (r).regno == REG_LB0 || (r).regno == REG_LB1              \
 216    || (r).regno == REG_CYCLES || (r).regno == REG_CYCLES2       \
 217    || (r).regno == REG_EMUDAT)
 218
 219 /* Expression value macros.  */
 220
 221 typedef enum
 222 {
 223   ones_compl,
 224   twos_compl,
 225   mult,
 226   divide,
 227   mod,
 228   add,
 229   sub,
 230   lsh,
 231   rsh,
 232   logand,
 233   logior,
 234   logxor
 235 } expr_opcodes_t;
 236
 237 struct expressionS;
 238
 239 #define SYMBOL_T       symbolS*
 240
 241 struct expression_cell
 242 {
 243   int value;
 244   SYMBOL_T symbol;
 245 };
 246
 247 /* User Type Definitions.  */
 248 struct bfin_insn
 249 {
 250   unsigned long value;
 251   struct bfin_insn *next;
 252   struct expression_cell *exp;
 253   int pcrel;
 254   int reloc;
 255 };
 256
 257 #define INSTR_T struct bfin_insn*
 258 #define EXPR_T  struct expression_cell*
 259
 260 typedef struct expr_node_struct Expr_Node;
 261
 262 extern INSTR_T gencode (unsigned long x);
 263 extern INSTR_T conscode (INSTR_T head, INSTR_T tail);
 264 extern INSTR_T conctcode (INSTR_T head, INSTR_T tail);
 265 extern INSTR_T note_reloc
 266        (INSTR_T code, Expr_Node *, int reloc,int pcrel);
 267 extern INSTR_T note_reloc1
 268        (INSTR_T code, const char * sym, int reloc, int pcrel);
 269 extern INSTR_T note_reloc2
 270        (INSTR_T code, const char *symbol, int reloc, int value, int pcrel);
 271
 272 /* Types of expressions.  */
 273 typedef enum
 274 {
 275   Expr_Node_Binop,              /* Binary operator.  */
 276   Expr_Node_Unop,               /* Unary operator.  */
 277   Expr_Node_Reloc,              /* Symbol to be relocated.  */
 278   Expr_Node_GOT_Reloc,          /* Symbol to be relocated using the GOT.  */
 279   Expr_Node_Constant            /* Constant.  */
 280 } Expr_Node_Type;
 281
 282 /* Types of operators.  */
 283 typedef enum
 284 {
 285   Expr_Op_Type_Add,
 286   Expr_Op_Type_Sub,
 287   Expr_Op_Type_Mult,
 288   Expr_Op_Type_Div,
 289   Expr_Op_Type_Mod,
 290   Expr_Op_Type_Lshift,
 291   Expr_Op_Type_Rshift,
 292   Expr_Op_Type_BAND,            /* Bitwise AND.  */
 293   Expr_Op_Type_BOR,             /* Bitwise OR.  */
 294   Expr_Op_Type_BXOR,            /* Bitwise exclusive OR.  */
 295   Expr_Op_Type_LAND,            /* Logical AND.  */
 296   Expr_Op_Type_LOR,             /* Logical OR.  */
 297   Expr_Op_Type_NEG,
 298   Expr_Op_Type_COMP             /* Complement.  */
 299 } Expr_Op_Type;
 300
 301 /* The value that can be stored ... depends on type.  */
 302 typedef union
 303 {
 304   const char *s_value;          /* if relocation symbol, the text.  */
 305   long long i_value;            /* if constant, the value.  */
 306   Expr_Op_Type op_value;        /* if operator, the value.  */
 307 } Expr_Node_Value;
 308
 309 /* The expression node.  */
 310 struct expr_node_struct
 311 {
 312   Expr_Node_Type        type;
 313   Expr_Node_Value       value;
 314   Expr_Node             *Left_Child;
 315   Expr_Node             *Right_Child;
 316 };
 317
 318
 319 /* Operations on the expression node.  */
 320 Expr_Node *Expr_Node_Create (Expr_Node_Type type,
 321                          Expr_Node_Value value,
 322                          Expr_Node *Left_Child,
 323                          Expr_Node *Right_Child);
 324
 325 /* Generate the reloc structure as a series of instructions.  */
 326 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
 327
 328 #define MKREF(x)        mkexpr (0,x)
 329 #define ALLOCATE(x)     malloc (x)
 330
 331 #define NULL_CODE ((INSTR_T) 0)
 332
 333 #ifndef EXPR_VALUE
 334 #define EXPR_VALUE(x)  (((x)->type == Expr_Node_Constant) ? ((x)->value.i_value) : 0)
 335 #endif
 336 #ifndef EXPR_SYMBOL
 337 #define EXPR_SYMBOL(x) ((x)->symbol)
 338 #endif
 339
 340
 341 typedef long reg_t;
 342
 343
 344 typedef struct _register
 345 {
 346   reg_t regno;       /* Register ID as defined in machine_registers.  */
 347   int   flags;
 348 } Register;
 349
 350
 351 typedef struct _macfunc
 352 {
 353   char n;
 354   char op;
 355   char w;
 356   char P;
 357   Register dst;
 358   Register s0;
 359   Register s1;
 360 } Macfunc;
 361
 362 typedef struct _opt_mode
 363 {
 364   int MM;
 365   int mod;
 366 } Opt_mode;
 367
 368 typedef enum
 369 {
 370   SEMANTIC_ERROR,
 371   NO_INSN_GENERATED,
 372   INSN_GENERATED
 373 } parse_state;
 374
 375
 376 #ifdef __cplusplus
 377 extern "C" {
 378 #endif
 379
 380 extern int debug_codeselection;
 381
 382 void error (char *format, ...);
 383 void warn (char *format, ...);
 384 int  semantic_error (char *syntax);
 385 void semantic_error_2 (char *syntax);
 386
 387 EXPR_T mkexpr (int, SYMBOL_T);
 388
 389 /* Defined in bfin-lex.l.  */
 390 void set_start_state (void);
 391
 392 extern int insn_regmask (int, int);
 393 #ifdef __cplusplus
 394 }
 395 #endif
 396
 397 #endif  /* BFIN_PARSE_H */
 398