1 /* LoongArch assembler/disassembler support.
3 Copyright (C) 2021-2022 Free Software Foundation, Inc.
4 Contributed by Loongson Ltd.
6 This file is part of GNU Binutils.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the license, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; see the file COPYING3. If not,
20 see <http://www.gnu.org/licenses/>. */
31 typedef uint32_t insn_t;
33 struct loongarch_opcode
36 const insn_t mask; /* High 1 byte is main opcode and it must be 0xf. */
37 #define LARCH_INSN_OPC(insn) ((insn & 0xf0000000) >> 28)
38 const char *const name;
42 // BNF with regular expression.
45 // just few char separate 'iden'
49 | iden // maybe a label (include at least one alphabet),
50 maybe a number, maybe a expr
55 iden : [a-zA-Z0-9\.\+\-]+
60 FORMAT: A string to describe the format of actual parameter including
61 bit field infomation. For example, "r5:5,r0:5,sr10:16<<2" matches
62 "$12,$13,12345" and "$4,$7,a_label". That 'sr' means the instruction
63 may need relocate. '10:16' means bit field of instruction.
64 In a 'format', every 'escape's can be replaced to 'iden' or 'regname'
65 acrroding to its meaning. We fill all information needed by
66 disassembing and assembing to 'format'.
68 // BNF with regular expression.
69 format : escape (literal+ escape)* literal* end
70 | (literal+ escape)* literal* end
72 end : '\0' // Get here means parse end.
74 // The intersection between any two among FIRST (end), FIRST
75 // (literal) and FIRST (escape) must be empty.
76 // So we can build a simple parser.
81 // Double '<'s means the real number is the immediate after shifting left.
82 escape : esc_ch bit_field '<' '<' dec2
84 | esc_ch // for MACRO. non-macro format must indicate 'bit_field'
86 // '|' means to concatenate nonadjacent bit fields
87 // For example, "10:16|0:4" means
88 // "16 bits starting from the 10th bit concatenating with 4 bits
89 // starting from the 0th bit".
90 // This is to say "[25..10]||[3..0]" (little endian).
91 b_field : dec2 ':' dec2
92 | dec2 ':' dec2 '|' bit_field
94 esc_ch : 's' 'r' // signed immediate or label need relocate
95 | 's' // signed immediate no need relocate
96 | 'u' // unsigned immediate
97 | 'l' // label needed relocate
98 | 'r' // general purpose registers
99 | 'f' // FPU registers
100 | 'v' // 128 bit SIMD register
101 | 'x' // 256 bit SIMD register
107 const char *const format;
109 /* MACRO: Indicate how a macro instruction expand for assembling.
110 The main is to replace the '%num'(means the 'num'th 'escape' in
111 'format') in 'macro' string to get the real instruction.
115 const char *const macro;
119 const unsigned long pinfo;
128 struct loongarch_opcode *const opcodes;
132 /* For disassemble to create main opcode hash table. */
133 const struct loongarch_opcode *opc_htab[16];
134 unsigned char opc_htab_inited;
136 /* For GAS to create hash table. */
137 struct htab *name_hash_entry;
140 extern int is_unsigned (const char *);
141 extern int is_signed (const char *);
142 extern int is_branch_label (const char *);
144 extern int loongarch_get_bit_field_width (const char *bit_field, char **end);
145 extern int32_t loongarch_decode_imm (const char *bit_field, insn_t insn,
148 #define MAX_ARG_NUM_PLUS_2 9
150 extern size_t loongarch_split_args_by_comma (char *args,
151 const char *arg_strs[]);
152 extern char *loongarch_cat_splited_strs (const char *arg_strs[]);
153 extern insn_t loongarch_foreach_args (
154 const char *format, const char *arg_strs[],
155 int32_t (*helper) (char esc1, char esc2, const char *bit_field,
156 const char *arg, void *context),
159 extern int loongarch_check_format (const char *format);
160 extern int loongarch_check_macro (const char *format, const char *macro);
162 extern char *loongarch_expand_macro_with_format_map (
163 const char *format, const char *macro, const char *const arg_strs[],
164 const char *(*map) (char esc1, char esc2, const char *arg),
165 char *(*helper) (const char *const arg_strs[], void *context),
166 void *context, size_t len_str);
167 extern char *loongarch_expand_macro (
168 const char *macro, const char *const arg_strs[],
169 char *(*helper) (const char *const arg_strs[], void *context),
170 void *context, size_t len_str);
171 extern size_t loongarch_bits_imm_needed (int64_t imm, int si);
173 extern void loongarch_eliminate_adjacent_repeat_char (char *dest, char c);
175 extern int loongarch_parse_dis_options (const char *opts_in);
176 extern void loongarch_disassemble_one (
177 int64_t pc, insn_t insn,
178 int (*fprintf_func) (void *stream, const char *format, ...), void *stream);
180 extern const char *const loongarch_r_normal_name[32];
181 extern const char *const loongarch_r_lp64_name[32];
182 extern const char *const loongarch_r_lp64_name1[32];
183 extern const char *const loongarch_f_normal_name[32];
184 extern const char *const loongarch_f_lp64_name[32];
185 extern const char *const loongarch_f_lp64_name1[32];
186 extern const char *const loongarch_c_normal_name[8];
187 extern const char *const loongarch_cr_normal_name[4];
188 extern const char *const loongarch_v_normal_name[32];
189 extern const char *const loongarch_x_normal_name[32];
191 extern struct loongarch_ase loongarch_ASEs[];
193 extern struct loongarch_ASEs_option
199 #define ase_abi abi.elf_abi
207 int use_single_float;
208 int use_double_float;
213 int use_la_local_with_abs;
214 int use_la_global_with_pcrel;
215 int use_la_global_with_abs;
217 #define ase_ilp32 isa.use_ilp32
218 #define ase_lp64 isa.use_lp64
220 #define ase_nf isa.use_soft_float
221 #define ase_sf isa.use_single_float
222 #define ase_df isa.use_double_float
224 #define ase_lsx isa.use_lsx
225 #define ase_lasx isa.use_lasx
227 #define ase_labs isa.use_la_local_with_abs
228 #define ase_gpcr isa.use_la_global_with_pcrel
229 #define ase_gabs isa.use_la_global_with_abs
233 extern size_t loongarch_insn_length (insn_t insn);
239 #endif /* _LOONGARCH_H_ */