gas/config/tc-tic6x.h

   1 /* Definitions for TI C6X assembler.
   2    Copyright 2010
   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 #define TC_TIC6X 1
  23 #define TARGET_BYTES_BIG_ENDIAN 0
  24 #define WORKING_DOT_WORD
  25 #define DOUBLEBAR_PARALLEL
  26 #define DWARF2_LINE_MIN_INSN_LENGTH 2
  27 #define MD_APPLY_SYM_VALUE(FIX) 0
  28 #define TC_PREDICATE_START_CHAR '['
  29 #define TC_PREDICATE_END_CHAR ']'
  30 /* For TI C6X, we keep spaces in what the preprocessor considers
  31    operands as they may separate functional unit specifiers from
  32    operands.  */
  33 #define TC_KEEP_OPERAND_SPACES 1
  34
  35 #define TARGET_ARCH     bfd_arch_tic6x
  36 #define TARGET_FORMAT   (target_big_endian      \
  37                          ? "elf32-tic6x-be"     \
  38                          : "elf32-tic6x-le")
  39
  40 typedef struct tic6x_label_list
  41 {
  42   struct tic6x_label_list *next;
  43   symbolS *label;
  44 } tic6x_label_list;
  45
  46 /* Must be consistent with the enum in tc-tic6x.c.  */
  47 #define TIC6X_NUM_UNWIND_REGS 13
  48
  49 /* Unwinding information state.  */
  50 typedef struct tic6x_unwind_info {
  51     int personality_index;
  52     symbolS *personality_routine;
  53     symbolS *function_start;
  54     segT saved_seg;
  55     subsegT saved_subseg;
  56     /* NULL if table entry is inline.  */
  57     symbolS *table_entry;
  58     char *frag_start;
  59     valueT data;
  60     /* 0 before .cfi_startproc
  61       -1 between .cfi_startproc and .handlerdata
  62       >0 between .handlerdata and .endp */
  63     int data_bytes;
  64
  65     offsetT reg_offset[TIC6X_NUM_UNWIND_REGS];
  66     bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS];
  67     int cfa_reg;
  68     int return_reg;
  69     unsigned safe_mask;
  70     unsigned compact_mask;
  71     unsigned reg_saved_mask;
  72     offsetT cfa_offset;
  73     bfd_boolean pop_rts;
  74     /* Only valid for UNWIND_OP_POP_REG */
  75     int saved_reg_count;
  76 } tic6x_unwind_info;
  77
  78 typedef struct
  79 {
  80   /* Any labels seen since the last instruction or data.  If not NULL,
  81      a following instruction may not have parallel bars, but must
  82      start a new execute packet.  */
  83   tic6x_label_list *label_list;
  84
  85   /* Whether compact instructions are forbidden here.  */
  86   bfd_boolean nocmp;
  87
  88   /* If there is a current execute packet, the frag being used for
  89      that execute packet.  */
  90   fragS *execute_packet_frag;
  91
  92   /* If there is a current execute packet, a pointer to the
  93      least-significant byte of the last instruction in it (for setting
  94      the p-bit).  */
  95   char *last_insn_lsb;
  96
  97   /* If there has been an SPMASK instruction in the current execute
  98      packet, a pointer to the first byte in it (for processing
  99      ||^); otherwise NULL.  */
 100   char *spmask_addr;
 101
 102   /* The functional units used in the current execute packet, recorded
 103      by setting the same bits as would be set in the 32-bit SPMASK
 104      instruction.  */
 105   unsigned int func_units_used;
 106
 107   /* If an SPLOOP-family instruction has been seen, and a following
 108      SPKERNEL-family instruction has not yet been seen, the ii value
 109      from the SPLOOP instruction (in the range 1 to 14); otherwise
 110      0.  */
 111   int sploop_ii;
 112
 113   /* Bit N indicates that an R_C6000_NONE relocation has been output for
 114      __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be
 115      emitted only once per section, to save unnecessary bloat.  */
 116   unsigned int marked_pr_dependency;
 117
 118   tic6x_unwind_info *unwind;
 119   tic6x_unwind_info *text_unwind;
 120 } tic6x_segment_info_type;
 121 #define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type
 122
 123 typedef struct
 124 {
 125   /* Whether this machine-dependent frag is used for instructions (as
 126      opposed to code alignment).  */
 127   bfd_boolean is_insns;
 128
 129   /* For a frag used for instructions, whether it is may cross a fetch
 130      packet boundary (subject to alignment requirements).  */
 131   bfd_boolean can_cross_fp_boundary;
 132 } tic6x_frag_info;
 133 #define TC_FRAG_TYPE tic6x_frag_info
 134 #define TC_FRAG_INIT(fragP) tic6x_frag_init (fragP)
 135 extern void tic6x_frag_init (fragS *fragp);
 136
 137 typedef struct
 138 {
 139   /* Whether this fix was for an ADDA instruction.  If so, a constant
 140      resulting from resolving the fix should be implicitly shifted
 141      left (it represents a value to be encoded literally in the
 142      instruction, whereas a non-constant represents a DP-relative
 143      value counting in the appropriate units).  */
 144   bfd_boolean fix_adda;
 145   /* The symbol to be subtracted in case of a PCR_H16 or PCR_L16
 146      reloc.  */
 147   symbolS *fix_subsy;
 148 } tic6x_fix_info;
 149 #define TC_FIX_TYPE tic6x_fix_info
 150 #define TC_INIT_FIX_DATA(fixP) tic6x_init_fix_data (fixP)
 151 struct fix;
 152 extern void tic6x_init_fix_data (struct fix *fixP);
 153
 154 #define md_after_parse_args() tic6x_after_parse_args ()
 155 extern void tic6x_after_parse_args (void);
 156
 157 #define md_cleanup() tic6x_cleanup ()
 158 extern void tic6x_cleanup (void);
 159
 160 #define md_cons_align(n) tic6x_cons_align (n)
 161 extern void tic6x_cons_align (int n);
 162
 163 #define md_do_align(n, fill, len, max, label)   \
 164   do {                                          \
 165     if (tic6x_do_align (n, fill, len, max))     \
 166       goto label;                               \
 167   } while (0)
 168 extern bfd_boolean tic6x_do_align (int n, char *fill, int len, int max);
 169
 170 #define CONVERT_SYMBOLIC_ATTRIBUTE(name)        \
 171   tic6x_convert_symbolic_attribute (name)
 172 extern int tic6x_convert_symbolic_attribute (const char *);
 173
 174 #define md_end() tic6x_end ();
 175 extern void tic6x_end (void);
 176
 177 #define md_parse_name(name, exprP, mode, nextcharP)     \
 178   tic6x_parse_name (name, exprP, mode, nextcharP)
 179 extern int tic6x_parse_name (const char *name, expressionS *exprP,
 180                              enum expr_mode mode, char *nextchar);
 181
 182 #define MD_PCREL_FROM_SECTION(FIX, SEC) tic6x_pcrel_from_section (FIX, SEC)
 183 extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec);
 184
 185 #define md_start_line_hook() tic6x_start_line_hook ()
 186 extern void tic6x_start_line_hook (void);
 187
 188 #define TC_CONS_FIX_NEW(frag, where, size, exp) \
 189   tic6x_cons_fix_new (frag, where, size, exp)
 190 extern void tic6x_cons_fix_new (fragS *frag, int where, int size,
 191                                 expressionS *exp);
 192
 193 #define tc_fix_adjustable(FIX) tic6x_fix_adjustable (FIX)
 194 extern bfd_boolean tic6x_fix_adjustable (struct fix *);
 195
 196 #define tc_frob_label(sym) tic6x_frob_label (sym)
 197 extern void tic6x_frob_label (symbolS *sym);
 198
 199 #define tc_init_after_args() tic6x_init_after_args ()
 200 extern void tic6x_init_after_args (void);
 201
 202 #define tc_unrecognized_line(c) tic6x_unrecognized_line (c)
 203 extern int tic6x_unrecognized_line (int c);
 204
 205 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 206 #define TARGET_USE_CFIPOP              1
 207
 208 /* CFI hooks.  */
 209 #define tc_regname_to_dw2regnum            tic6x_regname_to_dw2regnum
 210 int tic6x_regname_to_dw2regnum (char *regname);
 211
 212 #define tc_cfi_frame_initial_instructions  tic6x_frame_initial_instructions
 213 void tic6x_frame_initial_instructions (void);
 214
 215 /* The return register is B3.  */
 216 #define DWARF2_DEFAULT_RETURN_COLUMN  (16 + 3)
 217
 218 /* Registers are generally saved at negative offsets to the CFA.  */
 219 #define DWARF2_CIE_DATA_ALIGNMENT     (-4)
 220
 221 #define tc_cfi_startproc tic6x_cfi_startproc
 222 void tic6x_cfi_startproc (void);
 223
 224 #define tc_cfi_endproc tic6x_cfi_endproc
 225 struct fde_entry;
 226 void tic6x_cfi_endproc (struct fde_entry *fde);
 227
 228 #define tc_cfi_section_name ".c6xabi.exidx"