1/* Definitions for TI C6X assembler. 2 Copyright (C) 2010-2024 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 39typedef 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. */ 49typedef 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 bool 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 bool pop_rts; 73 /* Only valid for UNWIND_OP_POP_REG */ 74 int saved_reg_count; 75} tic6x_unwind_info; 76 77typedef 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 bool 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 122typedef struct 123{ 124 /* Whether this machine-dependent frag is used for instructions (as 125 opposed to code alignment). */ 126 bool 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 bool 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) 134extern void tic6x_frag_init (fragS *fragp); 135 136typedef 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 bool 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) 150struct fix; 151extern void tic6x_init_fix_data (struct fix *fixP); 152 153#define md_after_parse_args() tic6x_after_parse_args () 154extern void tic6x_after_parse_args (void); 155 156#define md_cleanup() tic6x_cleanup () 157extern void tic6x_cleanup (void); 158 159#define md_cons_align(n) tic6x_cons_align (n) 160extern 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) 167extern bool tic6x_do_align (int n, char *fill, int len, int max); 168 169#define CONVERT_SYMBOLIC_ATTRIBUTE(name) \ 170 tic6x_convert_symbolic_attribute (name) 171extern int tic6x_convert_symbolic_attribute (const char *); 172 173#define md_finish() tic6x_md_finish (); 174extern void tic6x_md_finish (void); 175 176#define md_parse_name(name, exprP, mode, nextcharP) \ 177 tic6x_parse_name (name, exprP, mode, nextcharP) 178extern 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) 182extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec); 183 184#define md_start_line_hook() tic6x_start_line_hook () 185extern 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) 189extern 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) 193extern bool tic6x_fix_adjustable (struct fix *); 194 195#define tc_frob_label(sym) tic6x_frob_label (sym) 196extern void tic6x_frob_label (symbolS *sym); 197 198#define tc_init_after_args() tic6x_init_after_args () 199extern void tic6x_init_after_args (void); 200 201#define tc_unrecognized_line(c) tic6x_unrecognized_line (c) 202extern 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 209int tic6x_regname_to_dw2regnum (char *regname); 210 211#define tc_cfi_frame_initial_instructions tic6x_frame_initial_instructions 212void 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 221void tic6x_cfi_startproc (void); 222 223#define tc_cfi_endproc tic6x_cfi_endproc 224struct fde_entry; 225void tic6x_cfi_endproc (struct fde_entry *fde); 226 227#define tc_cfi_section_name ".c6xabi.exidx" 228