gas/config/tc-tic6x.h

   1 /* Definitions for TI C6X assembler.
   2    Copyright (C) 2010-2021 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 #define TC_TIC6X 1
  22 #define TARGET_BYTES_BIG_ENDIAN 0
  23 #define WORKING_DOT_WORD
  24 #define DOUBLEBAR_PARALLEL
  25 #define DWARF2_LINE_MIN_INSN_LENGTH 2
  26 #define MD_APPLY_SYM_VALUE(FIX) 0
  27 #define TC_PREDICATE_START_CHAR '['
  28 #define TC_PREDICATE_END_CHAR ']'
  29 /* For TI C6X, we keep spaces in what the preprocessor considers
  30    operands as they may separate functional unit specifiers from
  31    operands.  */
  32 #define TC_KEEP_OPERAND_SPACES 1
  33
  34 #define TARGET_ARCH     bfd_arch_tic6x
  35 #define TARGET_FORMAT   (target_big_endian      \
  36                          ? "elf32-tic6x-be"     \
  37                          : "elf32-tic6x-le")
  38
  39 typedef struct tic6x_label_list
  40 {
  41   struct tic6x_label_list *next;
  42   symbolS *label;
  43 } tic6x_label_list;
  44
  45 /* Must be consistent with the enum in tc-tic6x.c.  */
  46 #define TIC6X_NUM_UNWIND_REGS 13
  47
  48 /* Unwinding information state.  */
  49 typedef struct tic6x_unwind_info {
  50     int personality_index;
  51     symbolS *personality_routine;
  52     symbolS *function_start;
  53     segT saved_seg;
  54     subsegT saved_subseg;
  55     /* NULL if table entry is inline.  */
  56     symbolS *table_entry;
  57     char *frag_start;
  58     valueT data;
  59     /* 0 before .cfi_startproc
  60       -1 between .cfi_startproc and .handlerdata
  61       >0 between .handlerdata and .endp */
  62     int data_bytes;
  63
  64     offsetT reg_offset[TIC6X_NUM_UNWIND_REGS];
  65     bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS];
  66     int cfa_reg;
  67     int return_reg;
  68     unsigned safe_mask;
  69     unsigned compact_mask;
  70     unsigned reg_saved_mask;
  71     offsetT cfa_offset;
  72     bfd_boolean pop_rts;
  73     /* Only valid for UNWIND_OP_POP_REG */
  74     int saved_reg_count;
  75 } tic6x_unwind_info;
  76
  77 typedef struct
  78 {
  79   /* Any labels seen since the last instruction or data.  If not NULL,
  80      a following instruction may not have parallel bars, but must
  81      start a new execute packet.  */
  82   tic6x_label_list *label_list;
  83
  84   /* Whether compact instructions are forbidden here.  */
  85   bfd_boolean nocmp;
  86
  87   /* If there is a current execute packet, the frag being used for
  88      that execute packet.  */
  89   fragS *execute_packet_frag;
  90
  91   /* If there is a current execute packet, a pointer to the
  92      least-significant byte of the last instruction in it (for setting
  93      the p-bit).  */
  94   char *last_insn_lsb;
  95
  96   /* If there has been an SPMASK instruction in the current execute
  97      packet, a pointer to the first byte in it (for processing
  98      ||^); otherwise NULL.  */
  99   char *spmask_addr;
 100
 101   /* The functional units used in the current execute packet, recorded
 102      by setting the same bits as would be set in the 32-bit SPMASK
 103      instruction.  */
 104   unsigned int func_units_used;
 105
 106   /* If an SPLOOP-family instruction has been seen, and a following
 107      SPKERNEL-family instruction has not yet been seen, the ii value
 108      from the SPLOOP instruction (in the range 1 to 14); otherwise
 109      0.  */
 110   int sploop_ii;
 111
 112   /* Bit N indicates that an R_C6000_NONE relocation has been output for
 113      __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be
 114      emitted only once per section, to save unnecessary bloat.  */
 115   unsigned int marked_pr_dependency;
 116
 117   tic6x_unwind_info *unwind;
 118   tic6x_unwind_info *text_unwind;
 119 } tic6x_segment_info_type;
 120 #define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type
 121
 122 typedef struct
 123 {
 124   /* Whether this machine-dependent frag is used for instructions (as
 125      opposed to code alignment).  */
 126   bfd_boolean is_insns;
 127
 128   /* For a frag used for instructions, whether it is may cross a fetch
 129      packet boundary (subject to alignment requirements).  */
 130   bfd_boolean can_cross_fp_boundary;
 131 } tic6x_frag_info;
 132 #define TC_FRAG_TYPE tic6x_frag_info
 133 #define TC_FRAG_INIT(fragP, max_bytes) tic6x_frag_init (fragP)
 134 extern void tic6x_frag_init (fragS *fragp);
 135
 136 typedef struct
 137 {
 138   /* Whether this fix was for an ADDA instruction.  If so, a constant
 139      resulting from resolving the fix should be implicitly shifted
 140      left (it represents a value to be encoded literally in the
 141      instruction, whereas a non-constant represents a DP-relative
 142      value counting in the appropriate units).  */
 143   bfd_boolean fix_adda;
 144   /* The symbol to be subtracted in case of a PCR_H16 or PCR_L16
 145      reloc.  */
 146   symbolS *fix_subsy;
 147 } tic6x_fix_info;
 148 #define TC_FIX_TYPE tic6x_fix_info
 149 #define TC_INIT_FIX_DATA(fixP) tic6x_init_fix_data (fixP)
 150 struct fix;
 151 extern void tic6x_init_fix_data (struct fix *fixP);
 152
 153 #define md_after_parse_args() tic6x_after_parse_args ()
 154 extern void tic6x_after_parse_args (void);
 155
 156 #define md_cleanup() tic6x_cleanup ()
 157 extern void tic6x_cleanup (void);
 158
 159 #define md_cons_align(n) tic6x_cons_align (n)
 160 extern void tic6x_cons_align (int n);
 161
 162 #define md_do_align(n, fill, len, max, label)   \
 163   do {                                          \
 164     if (tic6x_do_align (n, fill, len, max))     \
 165       goto label;                               \
 166   } while (0)
 167 extern bfd_boolean tic6x_do_align (int n, char *fill, int len, int max);
 168
 169 #define CONVERT_SYMBOLIC_ATTRIBUTE(name)        \
 170   tic6x_convert_symbolic_attribute (name)
 171 extern int tic6x_convert_symbolic_attribute (const char *);
 172
 173 #define md_end() tic6x_end ();
 174 extern void tic6x_end (void);
 175
 176 #define md_parse_name(name, exprP, mode, nextcharP)     \
 177   tic6x_parse_name (name, exprP, mode, nextcharP)
 178 extern int tic6x_parse_name (const char *name, expressionS *exprP,
 179                              enum expr_mode mode, char *nextchar);
 180
 181 #define MD_PCREL_FROM_SECTION(FIX, SEC) tic6x_pcrel_from_section (FIX, SEC)
 182 extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec);
 183
 184 #define md_start_line_hook() tic6x_start_line_hook ()
 185 extern void tic6x_start_line_hook (void);
 186
 187 #define TC_CONS_FIX_NEW(frag, where, size, exp, reloc)  \
 188   tic6x_cons_fix_new (frag, where, size, exp, reloc)
 189 extern void tic6x_cons_fix_new (fragS *, int, int, expressionS *,
 190                                 bfd_reloc_code_real_type);
 191
 192 #define tc_fix_adjustable(FIX) tic6x_fix_adjustable (FIX)
 193 extern bfd_boolean tic6x_fix_adjustable (struct fix *);
 194
 195 #define tc_frob_label(sym) tic6x_frob_label (sym)
 196 extern void tic6x_frob_label (symbolS *sym);
 197
 198 #define tc_init_after_args() tic6x_init_after_args ()
 199 extern void tic6x_init_after_args (void);
 200
 201 #define tc_unrecognized_line(c) tic6x_unrecognized_line (c)
 202 extern int tic6x_unrecognized_line (int c);
 203
 204 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 205 #define TARGET_USE_CFIPOP              1
 206
 207 /* CFI hooks.  */
 208 #define tc_regname_to_dw2regnum            tic6x_regname_to_dw2regnum
 209 int tic6x_regname_to_dw2regnum (char *regname);
 210
 211 #define tc_cfi_frame_initial_instructions  tic6x_frame_initial_instructions
 212 void tic6x_frame_initial_instructions (void);
 213
 214 /* The return register is B3.  */
 215 #define DWARF2_DEFAULT_RETURN_COLUMN  (16 + 3)
 216
 217 /* Registers are generally saved at negative offsets to the CFA.  */
 218 #define DWARF2_CIE_DATA_ALIGNMENT     (-4)
 219
 220 #define tc_cfi_startproc tic6x_cfi_startproc
 221 void tic6x_cfi_startproc (void);
 222
 223 #define tc_cfi_endproc tic6x_cfi_endproc
 224 struct fde_entry;
 225 void tic6x_cfi_endproc (struct fde_entry *fde);
 226
 227 #define tc_cfi_section_name ".c6xabi.exidx"