forked from Imagelibrary/binutils-gdb
LoongArch opcodes support
2021-10-22 Chenghua Xu <xuchenghua@loongson.cn> Zhensong Liu <liuzhensong@loongson.cn> Weinan Liu <liuweinan@loongson.cn> include/ * opcode/loongarch.h: New. * dis-asm.h: Declare print_loongarch_disassembler_options. opcodes/ * Makefile.am: Add LoongArch. * configure.ac: Likewise. * disassemble.c: Likewise. * disassemble.h: Declare print_insn_loongarch. * loongarch-coder.c: New. * loongarch-dis.c: New. * loongarch-opc.c: New. * Makefile.in: Regenerate. * configure: Regenerate. * po/POTFILES.in: Regenerate.
This commit is contained in:
liuzhensong
239
include/opcode/loongarch.h
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239
include/opcode/loongarch.h
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/* LoongArch assembler/disassembler support.
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Copyright (C) 2021 Free Software Foundation, Inc.
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Contributed by Loongson Ltd.
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This file is part of GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the license, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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#ifndef _LOONGARCH_H_
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#define _LOONGARCH_H_
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef uint32_t insn_t;
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struct loongarch_opcode
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{
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const insn_t match;
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const insn_t mask; /* High 1 byte is main opcode and it must be 0xf. */
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#define LARCH_INSN_OPC(insn) ((insn & 0xf0000000) >> 28)
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const char *const name;
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/* ACTUAL PARAMETER:
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// BNF with regular expression.
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args : token* end
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// just few char separate 'iden'
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token : ','
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| '('
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| ')'
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| iden // maybe a label (include at least one alphabet),
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maybe a number, maybe a expr
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| regname
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regname : '$' iden
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iden : [a-zA-Z0-9\.\+\-]+
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end : '\0'
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FORMAT: A string to describe the format of actual parameter including
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bit field infomation. For example, "r5:5,r0:5,sr10:16<<2" matches
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"$12,$13,12345" and "$4,$7,a_label". That 'sr' means the instruction
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may need relocate. '10:16' means bit field of instruction.
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In a 'format', every 'escape's can be replaced to 'iden' or 'regname'
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acrroding to its meaning. We fill all information needed by
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disassembing and assembing to 'format'.
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// BNF with regular expression.
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format : escape (literal+ escape)* literal* end
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| (literal+ escape)* literal* end
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end : '\0' // Get here means parse end.
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// The intersection between any two among FIRST (end), FIRST
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// (literal) and FIRST (escape) must be empty.
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// So we can build a simple parser.
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literal : ','
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| '('
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| ')'
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// Double '<'s means the real number is the immediate after shifting left.
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escape : esc_ch bit_field '<' '<' dec2
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| esc_ch bit_field
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| esc_ch // for MACRO. non-macro format must indicate 'bit_field'
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// '|' means to concatenate nonadjacent bit fields
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// For example, "10:16|0:4" means
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// "16 bits starting from the 10th bit concatenating with 4 bits
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// starting from the 0th bit".
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// This is to say "[25..10]||[3..0]" (little endian).
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b_field : dec2 ':' dec2
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| dec2 ':' dec2 '|' bit_field
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esc_ch : 's' 'r' // signed immediate or label need relocate
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| 's' // signed immediate no need relocate
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| 'u' // unsigned immediate
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| 'l' // label needed relocate
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| 'r' // general purpose registers
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| 'f' // FPU registers
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| 'v' // 128 bit SIMD register
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| 'x' // 256 bit SIMD register
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dec2 : [1-9][0-9]?
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| 0
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*/
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const char *const format;
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/* MACRO: Indicate how a macro instruction expand for assembling.
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The main is to replace the '%num'(means the 'num'th 'escape' in
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'format') in 'macro' string to get the real instruction.
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Maybe need
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*/
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const char *const macro;
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const int *include;
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const int *exclude;
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const unsigned long pinfo;
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#define USELESS 0x0l
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};
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struct hash_control;
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struct loongarch_ase
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{
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const int *enabled;
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struct loongarch_opcode *const opcodes;
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const int *include;
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const int *exclude;
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/* For disassemble to create main opcode hash table. */
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const struct loongarch_opcode *opc_htab[16];
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unsigned char opc_htab_inited;
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/* For GAS to create hash table. */
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struct htab *name_hash_entry;
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};
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extern int is_unsigned (const char *);
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extern int is_signed (const char *);
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extern int is_branch_label (const char *);
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extern int loongarch_get_bit_field_width (const char *bit_field, char **end);
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extern int32_t loongarch_decode_imm (const char *bit_field, insn_t insn,
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int si);
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#define MAX_ARG_NUM_PLUS_2 9
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extern size_t loongarch_split_args_by_comma (char *args,
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const char *arg_strs[]);
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extern char *loongarch_cat_splited_strs (const char *arg_strs[]);
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extern insn_t loongarch_foreach_args (
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const char *format, const char *arg_strs[],
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int32_t (*helper) (char esc1, char esc2, const char *bit_field,
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const char *arg, void *context),
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void *context);
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extern int loongarch_check_format (const char *format);
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extern int loongarch_check_macro (const char *format, const char *macro);
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extern char *loongarch_expand_macro_with_format_map (
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const char *format, const char *macro, const char *const arg_strs[],
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const char *(*map) (char esc1, char esc2, const char *arg),
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char *(*helper) (const char *const arg_strs[], void *context),
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void *context);
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extern char *loongarch_expand_macro (
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const char *macro, const char *const arg_strs[],
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char *(*helper) (const char *const arg_strs[], void *context),
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void *context);
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extern size_t loongarch_bits_imm_needed (int64_t imm, int si);
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extern void loongarch_eliminate_adjacent_repeat_char (char *dest, char c);
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extern int loongarch_parse_dis_options (const char *opts_in);
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extern void loongarch_disassemble_one (
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int64_t pc, insn_t insn,
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int (*fprintf_func) (void *stream, const char *format, ...), void *stream);
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extern const char *const loongarch_r_normal_name[32];
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extern const char *const loongarch_r_lp64_name[32];
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extern const char *const loongarch_r_lp64_name1[32];
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extern const char *const loongarch_f_normal_name[32];
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extern const char *const loongarch_f_lp64_name[32];
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extern const char *const loongarch_f_lp64_name1[32];
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extern const char *const loongarch_c_normal_name[8];
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extern const char *const loongarch_cr_normal_name[4];
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extern const char *const loongarch_v_normal_name[32];
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extern const char *const loongarch_x_normal_name[32];
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extern struct loongarch_ase loongarch_ASEs[];
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extern struct loongarch_ASEs_option
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{
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struct opt_abi
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{
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int elf_abi;
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} abi;
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#define ase_abi abi.elf_abi
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struct opt_isa
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{
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int use_ilp32;
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int use_lp64;
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int use_soft_float;
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int use_single_float;
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int use_double_float;
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int use_lsx;
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int use_lasx;
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int use_la_local_with_abs;
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int use_la_global_with_pcrel;
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int use_la_global_with_abs;
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} isa;
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#define ase_ilp32 isa.use_ilp32
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#define ase_lp64 isa.use_lp64
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#define ase_nf isa.use_soft_float
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#define ase_sf isa.use_single_float
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#define ase_df isa.use_double_float
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#define ase_lsx isa.use_lsx
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#define ase_lasx isa.use_lasx
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#define ase_labs isa.use_la_local_with_abs
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#define ase_gpcr isa.use_la_global_with_pcrel
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#define ase_gabs isa.use_la_global_with_abs
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} LARCH_opts;
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extern size_t loongarch_insn_length (insn_t insn);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LOONGARCH_H_ */
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