gas/config/bfin-defs.h

   1 /* bfin-defs.h ADI Blackfin gas header file
   2    Copyright (C) 2005-2021 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #ifndef BFIN_PARSE_H
  22 #define BFIN_PARSE_H
  23
  24 #include "opcode/bfin.h"
  25
  26 #define PCREL   1
  27 #define CODE_FRAG_SIZE 4096  /* 1 page.  */
  28
  29
  30 /* Definition for all status bits.  */
  31 typedef enum
  32 {
  33   c_0,
  34   c_1,
  35   c_4,
  36   c_2,
  37   c_uimm2,
  38   c_uimm3,
  39   c_imm3,
  40   c_pcrel4,
  41   c_imm4,
  42   c_uimm4s4,
  43   c_uimm4,
  44   c_uimm4s2,
  45   c_negimm5s4,
  46   c_imm5,
  47   c_uimm5,
  48   c_imm6,
  49   c_imm7,
  50   c_imm8,
  51   c_uimm8,
  52   c_pcrel8,
  53   c_uimm8s4,
  54   c_pcrel8s4,
  55   c_lppcrel10,
  56   c_pcrel10,
  57   c_pcrel12,
  58   c_imm16s4,
  59   c_luimm16,
  60   c_imm16,
  61   c_huimm16,
  62   c_rimm16,
  63   c_imm16s2,
  64   c_uimm16s4,
  65   c_uimm16,
  66   c_pcrel24
  67 } const_forms_t;
  68
  69
  70 /* High-Nibble: group code, low nibble: register code.  */
  71
  72
  73 #define T_REG_R       0x00
  74 #define T_REG_P       0x10
  75 #define T_REG_I       0x20
  76 #define T_REG_B       0x30
  77 #define T_REG_L       0x34
  78 #define T_REG_M       0x24
  79 #define T_REG_A       0x40
  80
  81 /* All registers above this value don't
  82    belong to a usable register group.  */
  83 #define T_NOGROUP     0xa0
  84
  85 /* Flags.  */
  86 #define F_REG_NONE 0
  87 #define F_REG_HIGH 1
  88 #define F_REG_LOW 2
  89
  90 enum machine_registers
  91 {
  92   REG_R0    = T_REG_R, REG_R1, REG_R2, REG_R3, REG_R4, REG_R5, REG_R6, REG_R7,
  93   REG_P0    = T_REG_P, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
  94   REG_I0    = T_REG_I, REG_I1, REG_I2, REG_I3,
  95   REG_M0    = T_REG_M, REG_M1, REG_M2, REG_M3,
  96   REG_B0    = T_REG_B, REG_B1, REG_B2, REG_B3,
  97   REG_L0    = T_REG_L, REG_L1, REG_L2, REG_L3,
  98   REG_A0x   = T_REG_A, REG_A0w, REG_A1x, REG_A1w,
  99   REG_ASTAT = 0x46,
 100   REG_RETS  = 0x47,
 101   REG_LC0   = 0x60, REG_LT0, REG_LB0,  REG_LC1, REG_LT1, REG_LB1,
 102               REG_CYCLES, REG_CYCLES2,
 103   REG_USP   = 0x70, REG_SEQSTAT, REG_SYSCFG,
 104               REG_RETI, REG_RETX, REG_RETN, REG_RETE, REG_EMUDAT,
 105
 106 /* These don't have groups.  */
 107   REG_sftreset = T_NOGROUP, REG_omode, REG_excause, REG_emucause,
 108                  REG_idle_req, REG_hwerrcause,
 109   REG_A0       = 0xc0, REG_A1, REG_CC,
 110 /* Pseudo registers, used only for distinction from symbols.  */
 111                  REG_RL0, REG_RL1, REG_RL2, REG_RL3,
 112                  REG_RL4, REG_RL5, REG_RL6, REG_RL7,
 113                  REG_RH0, REG_RH1, REG_RH2, REG_RH3,
 114                  REG_RH4, REG_RH5, REG_RH6, REG_RH7,
 115                  REG_LASTREG
 116 };
 117
 118 /* Status register flags.  */
 119
 120 enum statusflags
 121 {
 122   S_AZ = 0,
 123   S_AN,
 124   S_AC0_COPY,
 125   S_V_COPY,
 126   S_AQ = 6,
 127   S_RND_MOD = 8,
 128   S_AC0 = 12,
 129   S_AC1,
 130   S_AV0 = 16,
 131   S_AV0S,
 132   S_AV1,
 133   S_AV1S,
 134   S_V = 24,
 135   S_VS = 25
 136 };
 137
 138
 139 enum reg_class
 140 {
 141   rc_dregs_lo,
 142   rc_dregs_hi,
 143   rc_dregs,
 144   rc_dregs_pair,
 145   rc_pregs,
 146   rc_spfp,
 147   rc_dregs_hilo,
 148   rc_accum_ext,
 149   rc_accum_word,
 150   rc_accum,
 151   rc_iregs,
 152   rc_mregs,
 153   rc_bregs,
 154   rc_lregs,
 155   rc_dpregs,
 156   rc_gregs,
 157   rc_regs,
 158   rc_statbits,
 159   rc_ignore_bits,
 160   rc_ccstat,
 161   rc_counters,
 162   rc_dregs2_sysregs1,
 163   rc_open,
 164   rc_sysregs2,
 165   rc_sysregs3,
 166   rc_allregs,
 167   LIM_REG_CLASSES
 168 };
 169
 170 /* Register type checking macros.  */
 171
 172 #define CODE_MASK  0x07
 173 #define CLASS_MASK 0xf0
 174
 175 #define REG_SAME(a, b)   ((a).regno == (b).regno)
 176 #define REG_EQUAL(a, b)  (((a).regno & CODE_MASK) == ((b).regno & CODE_MASK))
 177 #define REG_CLASS(a)     ((a).regno & 0xf0)
 178 #define IS_A1(a)         ((a).regno == REG_A1)
 179 #define IS_H(a)          ((a).flags & F_REG_HIGH ? 1: 0)
 180 #define IS_EVEN(r)       ((r).regno % 2 == 0)
 181 #define IS_HCOMPL(a, b)  (REG_EQUAL(a, b) && \
 182                          ((a).flags & F_REG_HIGH) != ((b).flags & F_REG_HIGH))
 183
 184 /* register type checking.  */
 185 #define _TYPECHECK(r, x) (((r).regno & CLASS_MASK) == T_REG_##x)
 186
 187 #define IS_DREG(r)       _TYPECHECK(r, R)
 188 #define IS_DREG_H(r)     (_TYPECHECK(r, R) && IS_H(r))
 189 #define IS_DREG_L(r)     (_TYPECHECK(r, R) && !IS_H(r))
 190 #define IS_PREG(r)       _TYPECHECK(r, P)
 191 #define IS_IREG(r)       (((r).regno & 0xf4) == T_REG_I)
 192 #define IS_MREG(r)       (((r).regno & 0xf4) == T_REG_M)
 193 #define IS_BREG(r)       (((r).regno & 0xf4) == T_REG_B)
 194 #define IS_LREG(r)       (((r).regno & 0xf4) == T_REG_L)
 195 #define IS_CREG(r)       ((r).regno == REG_LC0 || (r).regno == REG_LC1)
 196 #define IS_EMUDAT(r)     ((r).regno == REG_EMUDAT)
 197 #define IS_ALLREG(r)     ((r).regno < T_NOGROUP)
 198
 199 #define IS_GENREG(r) \
 200   (IS_DREG (r) || IS_PREG (r)                           \
 201    || (r).regno == REG_A0x || (r).regno == REG_A0w      \
 202    || (r).regno == REG_A1x || (r).regno == REG_A1w)
 203
 204 #define IS_DAGREG(r) \
 205   (IS_IREG (r) || IS_MREG (r) || IS_BREG (r) || IS_LREG (r))
 206
 207 #define IS_SYSREG(r) \
 208   ((r).regno == REG_ASTAT || (r).regno == REG_SEQSTAT           \
 209    || (r).regno == REG_SYSCFG || (r).regno == REG_RETI          \
 210    || (r).regno == REG_RETX || (r).regno == REG_RETN            \
 211    || (r).regno == REG_RETE || (r).regno == REG_RETS            \
 212    || (r).regno == REG_LC0 || (r).regno == REG_LC1              \
 213    || (r).regno == REG_LT0 || (r).regno == REG_LT1              \
 214    || (r).regno == REG_LB0 || (r).regno == REG_LB1              \
 215    || (r).regno == REG_CYCLES || (r).regno == REG_CYCLES2       \
 216    || (r).regno == REG_EMUDAT)
 217
 218 /* Expression value macros.  */
 219
 220 typedef enum
 221 {
 222   ones_compl,
 223   twos_compl,
 224   mult,
 225   divide,
 226   mod,
 227   add,
 228   sub,
 229   lsh,
 230   rsh,
 231   logand,
 232   logior,
 233   logxor
 234 } expr_opcodes_t;
 235
 236 struct expressionS;
 237
 238 #define SYMBOL_T       symbolS*
 239
 240 struct expression_cell
 241 {
 242   int value;
 243   SYMBOL_T symbol;
 244 };
 245
 246 /* User Type Definitions.  */
 247 struct bfin_insn
 248 {
 249   unsigned long value;
 250   struct bfin_insn *next;
 251   struct expression_cell *exp;
 252   int pcrel;
 253   int reloc;
 254 };
 255
 256 #define INSTR_T struct bfin_insn*
 257 #define EXPR_T  struct expression_cell*
 258
 259 typedef struct expr_node_struct Expr_Node;
 260
 261 extern INSTR_T gencode (unsigned long x);
 262 extern INSTR_T conscode (INSTR_T head, INSTR_T tail);
 263 extern INSTR_T conctcode (INSTR_T head, INSTR_T tail);
 264 extern INSTR_T note_reloc
 265        (INSTR_T code, Expr_Node *, int reloc,int pcrel);
 266 extern INSTR_T note_reloc1
 267        (INSTR_T code, const char * sym, int reloc, int pcrel);
 268 extern INSTR_T note_reloc2
 269        (INSTR_T code, const char *symbol, int reloc, int value, int pcrel);
 270
 271 /* Types of expressions.  */
 272 typedef enum
 273 {
 274   Expr_Node_Binop,              /* Binary operator.  */
 275   Expr_Node_Unop,               /* Unary operator.  */
 276   Expr_Node_Reloc,              /* Symbol to be relocated.  */
 277   Expr_Node_GOT_Reloc,          /* Symbol to be relocated using the GOT.  */
 278   Expr_Node_Constant            /* Constant.  */
 279 } Expr_Node_Type;
 280
 281 /* Types of operators.  */
 282 typedef enum
 283 {
 284   Expr_Op_Type_Add,
 285   Expr_Op_Type_Sub,
 286   Expr_Op_Type_Mult,
 287   Expr_Op_Type_Div,
 288   Expr_Op_Type_Mod,
 289   Expr_Op_Type_Lshift,
 290   Expr_Op_Type_Rshift,
 291   Expr_Op_Type_BAND,            /* Bitwise AND.  */
 292   Expr_Op_Type_BOR,             /* Bitwise OR.  */
 293   Expr_Op_Type_BXOR,            /* Bitwise exclusive OR.  */
 294   Expr_Op_Type_LAND,            /* Logical AND.  */
 295   Expr_Op_Type_LOR,             /* Logical OR.  */
 296   Expr_Op_Type_NEG,
 297   Expr_Op_Type_COMP             /* Complement.  */
 298 } Expr_Op_Type;
 299
 300 /* The value that can be stored ... depends on type.  */
 301 typedef union
 302 {
 303   const char *s_value;          /* if relocation symbol, the text.  */
 304   long long i_value;            /* if constant, the value.  */
 305   Expr_Op_Type op_value;        /* if operator, the value.  */
 306 } Expr_Node_Value;
 307
 308 /* The expression node.  */
 309 struct expr_node_struct
 310 {
 311   Expr_Node_Type        type;
 312   Expr_Node_Value       value;
 313   Expr_Node             *Left_Child;
 314   Expr_Node             *Right_Child;
 315 };
 316
 317
 318 /* Operations on the expression node.  */
 319 Expr_Node *Expr_Node_Create (Expr_Node_Type type,
 320                          Expr_Node_Value value,
 321                          Expr_Node *Left_Child,
 322                          Expr_Node *Right_Child);
 323
 324 /* Generate the reloc structure as a series of instructions.  */
 325 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
 326
 327 #define MKREF(x)        mkexpr (0,x)
 328
 329 #define NULL_CODE ((INSTR_T) 0)
 330
 331 #ifndef EXPR_VALUE
 332 #define EXPR_VALUE(x)  (((x)->type == Expr_Node_Constant) ? ((x)->value.i_value) : 0)
 333 #endif
 334 #ifndef EXPR_SYMBOL
 335 #define EXPR_SYMBOL(x) ((x)->symbol)
 336 #endif
 337
 338
 339 typedef long reg_t;
 340
 341
 342 typedef struct _register
 343 {
 344   reg_t regno;       /* Register ID as defined in machine_registers.  */
 345   int   flags;
 346 } Register;
 347
 348
 349 typedef struct _macfunc
 350 {
 351   char n;
 352   char op;
 353   char w;
 354   char P;
 355   Register dst;
 356   Register s0;
 357   Register s1;
 358 } Macfunc;
 359
 360 typedef struct _opt_mode
 361 {
 362   int MM;
 363   int mod;
 364 } Opt_mode;
 365
 366 typedef enum
 367 {
 368   SEMANTIC_ERROR,
 369   NO_INSN_GENERATED,
 370   INSN_GENERATED
 371 } parse_state;
 372
 373
 374 #ifdef __cplusplus
 375 extern "C" {
 376 #endif
 377
 378 extern int debug_codeselection;
 379
 380 void error (const char *format, ...);
 381 void warn (char *format, ...);
 382 int  semantic_error (char *syntax);
 383 void semantic_error_2 (char *syntax);
 384
 385 EXPR_T mkexpr (int, SYMBOL_T);
 386
 387 /* Defined in bfin-lex.l.  */
 388 void set_start_state (void);
 389
 390 extern int insn_regmask (int, int);
 391 #ifdef __cplusplus
 392 }
 393 #endif
 394
 395 #endif  /* BFIN_PARSE_H */
 396