1/* Definitions for TI C6X assembler.
2   Copyright (C) 2010-2020 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    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
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  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
122typedef 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)
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  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)
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 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)
171extern int tic6x_convert_symbolic_attribute (const char *);
172
173#define md_end() tic6x_end ();
174extern void tic6x_end (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 bfd_boolean 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