1 /* riscv.h. RISC-V opcode list for GDB, the GNU debugger.
2 Copyright 2011-2016 Free Software Foundation, Inc.
3 Contributed by Andrew Waterman
5 This file is part of GDB, GAS, and the GNU binutils.
7 GDB, GAS, and the GNU binutils are free software; you can redistribute
8 them and/or modify them under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either version
10 3, or (at your option) any later version.
12 GDB, GAS, and the GNU binutils are distributed in the hope that they
13 will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
24 #include "riscv-opc.h"
28 typedef uint64_t insn_t;
30 static inline unsigned int riscv_insn_length (insn_t insn)
32 if ((insn & 0x3) != 0x3) /* RVC. */
34 if ((insn & 0x1f) != 0x1f) /* Base ISA and extensions in 32-bit space. */
36 if ((insn & 0x3f) == 0x1f) /* 48-bit extensions. */
38 if ((insn & 0x7f) == 0x3f) /* 64-bit extensions. */
40 /* Longer instructions not supported at the moment. */
44 static const char * const riscv_rm[8] =
46 "rne", "rtz", "rdn", "rup", "rmm", 0, 0, "dyn"
49 static const char * const riscv_pred_succ[16] =
51 0, "w", "r", "rw", "o", "ow", "or", "orw",
52 "i", "iw", "ir", "irw", "io", "iow", "ior", "iorw"
55 #define RVC_JUMP_BITS 11
56 #define RVC_JUMP_REACH ((1ULL << RVC_JUMP_BITS) * RISCV_JUMP_ALIGN)
58 #define RVC_BRANCH_BITS 8
59 #define RVC_BRANCH_REACH ((1ULL << RVC_BRANCH_BITS) * RISCV_BRANCH_ALIGN)
61 #define RV_X(x, s, n) (((x) >> (s)) & ((1 << (n)) - 1))
62 #define RV_IMM_SIGN(x) (-(((x) >> 31) & 1))
64 #define EXTRACT_ITYPE_IMM(x) \
65 (RV_X(x, 20, 12) | (RV_IMM_SIGN(x) << 12))
66 #define EXTRACT_STYPE_IMM(x) \
67 (RV_X(x, 7, 5) | (RV_X(x, 25, 7) << 5) | (RV_IMM_SIGN(x) << 12))
68 #define EXTRACT_SBTYPE_IMM(x) \
69 ((RV_X(x, 8, 4) << 1) | (RV_X(x, 25, 6) << 5) | (RV_X(x, 7, 1) << 11) | (RV_IMM_SIGN(x) << 12))
70 #define EXTRACT_UTYPE_IMM(x) \
71 ((RV_X(x, 12, 20) << 12) | (RV_IMM_SIGN(x) << 32))
72 #define EXTRACT_UJTYPE_IMM(x) \
73 ((RV_X(x, 21, 10) << 1) | (RV_X(x, 20, 1) << 11) | (RV_X(x, 12, 8) << 12) | (RV_IMM_SIGN(x) << 20))
74 #define EXTRACT_RVC_IMM(x) \
75 (RV_X(x, 2, 5) | (-RV_X(x, 12, 1) << 5))
76 #define EXTRACT_RVC_LUI_IMM(x) \
77 (EXTRACT_RVC_IMM (x) << RISCV_IMM_BITS)
78 #define EXTRACT_RVC_SIMM3(x) \
79 (RV_X(x, 10, 2) | (-RV_X(x, 12, 1) << 2))
80 #define EXTRACT_RVC_ADDI4SPN_IMM(x) \
81 ((RV_X(x, 6, 1) << 2) | (RV_X(x, 5, 1) << 3) | (RV_X(x, 11, 2) << 4) | (RV_X(x, 7, 4) << 6))
82 #define EXTRACT_RVC_ADDI16SP_IMM(x) \
83 ((RV_X(x, 6, 1) << 4) | (RV_X(x, 2, 1) << 5) | (RV_X(x, 5, 1) << 6) | (RV_X(x, 3, 2) << 7) | (-RV_X(x, 12, 1) << 9))
84 #define EXTRACT_RVC_LW_IMM(x) \
85 ((RV_X(x, 6, 1) << 2) | (RV_X(x, 10, 3) << 3) | (RV_X(x, 5, 1) << 6))
86 #define EXTRACT_RVC_LD_IMM(x) \
87 ((RV_X(x, 10, 3) << 3) | (RV_X(x, 5, 2) << 6))
88 #define EXTRACT_RVC_LWSP_IMM(x) \
89 ((RV_X(x, 4, 3) << 2) | (RV_X(x, 12, 1) << 5) | (RV_X(x, 2, 2) << 6))
90 #define EXTRACT_RVC_LDSP_IMM(x) \
91 ((RV_X(x, 5, 2) << 3) | (RV_X(x, 12, 1) << 5) | (RV_X(x, 2, 3) << 6))
92 #define EXTRACT_RVC_SWSP_IMM(x) \
93 ((RV_X(x, 9, 4) << 2) | (RV_X(x, 7, 2) << 6))
94 #define EXTRACT_RVC_SDSP_IMM(x) \
95 ((RV_X(x, 10, 3) << 3) | (RV_X(x, 7, 3) << 6))
96 #define EXTRACT_RVC_B_IMM(x) \
97 ((RV_X(x, 3, 2) << 1) | (RV_X(x, 10, 2) << 3) | (RV_X(x, 2, 1) << 5) | (RV_X(x, 5, 2) << 6) | (-RV_X(x, 12, 1) << 8))
98 #define EXTRACT_RVC_J_IMM(x) \
99 ((RV_X(x, 3, 3) << 1) | (RV_X(x, 11, 1) << 4) | (RV_X(x, 2, 1) << 5) | (RV_X(x, 7, 1) << 6) | (RV_X(x, 6, 1) << 7) | (RV_X(x, 9, 2) << 8) | (RV_X(x, 8, 1) << 10) | (-RV_X(x, 12, 1) << 11))
101 #define ENCODE_ITYPE_IMM(x) \
102 (RV_X(x, 0, 12) << 20)
103 #define ENCODE_STYPE_IMM(x) \
104 ((RV_X(x, 0, 5) << 7) | (RV_X(x, 5, 7) << 25))
105 #define ENCODE_SBTYPE_IMM(x) \
106 ((RV_X(x, 1, 4) << 8) | (RV_X(x, 5, 6) << 25) | (RV_X(x, 11, 1) << 7) | (RV_X(x, 12, 1) << 31))
107 #define ENCODE_UTYPE_IMM(x) \
108 (RV_X(x, 12, 20) << 12)
109 #define ENCODE_UJTYPE_IMM(x) \
110 ((RV_X(x, 1, 10) << 21) | (RV_X(x, 11, 1) << 20) | (RV_X(x, 12, 8) << 12) | (RV_X(x, 20, 1) << 31))
111 #define ENCODE_RVC_IMM(x) \
112 ((RV_X(x, 0, 5) << 2) | (RV_X(x, 5, 1) << 12))
113 #define ENCODE_RVC_LUI_IMM(x) \
114 ENCODE_RVC_IMM ((x) >> RISCV_IMM_BITS)
115 #define ENCODE_RVC_SIMM3(x) \
116 (RV_X(x, 0, 3) << 10)
117 #define ENCODE_RVC_ADDI4SPN_IMM(x) \
118 ((RV_X(x, 2, 1) << 6) | (RV_X(x, 3, 1) << 5) | (RV_X(x, 4, 2) << 11) | (RV_X(x, 6, 4) << 7))
119 #define ENCODE_RVC_ADDI16SP_IMM(x) \
120 ((RV_X(x, 4, 1) << 6) | (RV_X(x, 5, 1) << 2) | (RV_X(x, 6, 1) << 5) | (RV_X(x, 7, 2) << 3) | (RV_X(x, 9, 1) << 12))
121 #define ENCODE_RVC_LW_IMM(x) \
122 ((RV_X(x, 2, 1) << 6) | (RV_X(x, 3, 3) << 10) | (RV_X(x, 6, 1) << 5))
123 #define ENCODE_RVC_LD_IMM(x) \
124 ((RV_X(x, 3, 3) << 10) | (RV_X(x, 6, 2) << 5))
125 #define ENCODE_RVC_LWSP_IMM(x) \
126 ((RV_X(x, 2, 3) << 4) | (RV_X(x, 5, 1) << 12) | (RV_X(x, 6, 2) << 2))
127 #define ENCODE_RVC_LDSP_IMM(x) \
128 ((RV_X(x, 3, 2) << 5) | (RV_X(x, 5, 1) << 12) | (RV_X(x, 6, 3) << 2))
129 #define ENCODE_RVC_SWSP_IMM(x) \
130 ((RV_X(x, 2, 4) << 9) | (RV_X(x, 6, 2) << 7))
131 #define ENCODE_RVC_SDSP_IMM(x) \
132 ((RV_X(x, 3, 3) << 10) | (RV_X(x, 6, 3) << 7))
133 #define ENCODE_RVC_B_IMM(x) \
134 ((RV_X(x, 1, 2) << 3) | (RV_X(x, 3, 2) << 10) | (RV_X(x, 5, 1) << 2) | (RV_X(x, 6, 2) << 5) | (RV_X(x, 8, 1) << 12))
135 #define ENCODE_RVC_J_IMM(x) \
136 ((RV_X(x, 1, 3) << 3) | (RV_X(x, 4, 1) << 11) | (RV_X(x, 5, 1) << 2) | (RV_X(x, 6, 1) << 7) | (RV_X(x, 7, 1) << 6) | (RV_X(x, 8, 2) << 9) | (RV_X(x, 10, 1) << 8) | (RV_X(x, 11, 1) << 12))
138 #define VALID_ITYPE_IMM(x) (EXTRACT_ITYPE_IMM(ENCODE_ITYPE_IMM(x)) == (x))
139 #define VALID_STYPE_IMM(x) (EXTRACT_STYPE_IMM(ENCODE_STYPE_IMM(x)) == (x))
140 #define VALID_SBTYPE_IMM(x) (EXTRACT_SBTYPE_IMM(ENCODE_SBTYPE_IMM(x)) == (x))
141 #define VALID_UTYPE_IMM(x) (EXTRACT_UTYPE_IMM(ENCODE_UTYPE_IMM(x)) == (x))
142 #define VALID_UJTYPE_IMM(x) (EXTRACT_UJTYPE_IMM(ENCODE_UJTYPE_IMM(x)) == (x))
143 #define VALID_RVC_IMM(x) (EXTRACT_RVC_IMM(ENCODE_RVC_IMM(x)) == (x))
144 #define VALID_RVC_LUI_IMM(x) (EXTRACT_RVC_LUI_IMM(ENCODE_RVC_LUI_IMM(x)) == (x))
145 #define VALID_RVC_SIMM3(x) (EXTRACT_RVC_SIMM3(ENCODE_RVC_SIMM3(x)) == (x))
146 #define VALID_RVC_ADDI4SPN_IMM(x) (EXTRACT_RVC_ADDI4SPN_IMM(ENCODE_RVC_ADDI4SPN_IMM(x)) == (x))
147 #define VALID_RVC_ADDI16SP_IMM(x) (EXTRACT_RVC_ADDI16SP_IMM(ENCODE_RVC_ADDI16SP_IMM(x)) == (x))
148 #define VALID_RVC_LW_IMM(x) (EXTRACT_RVC_LW_IMM(ENCODE_RVC_LW_IMM(x)) == (x))
149 #define VALID_RVC_LD_IMM(x) (EXTRACT_RVC_LD_IMM(ENCODE_RVC_LD_IMM(x)) == (x))
150 #define VALID_RVC_LWSP_IMM(x) (EXTRACT_RVC_LWSP_IMM(ENCODE_RVC_LWSP_IMM(x)) == (x))
151 #define VALID_RVC_LDSP_IMM(x) (EXTRACT_RVC_LDSP_IMM(ENCODE_RVC_LDSP_IMM(x)) == (x))
152 #define VALID_RVC_SWSP_IMM(x) (EXTRACT_RVC_SWSP_IMM(ENCODE_RVC_SWSP_IMM(x)) == (x))
153 #define VALID_RVC_SDSP_IMM(x) (EXTRACT_RVC_SDSP_IMM(ENCODE_RVC_SDSP_IMM(x)) == (x))
154 #define VALID_RVC_B_IMM(x) (EXTRACT_RVC_B_IMM(ENCODE_RVC_B_IMM(x)) == (x))
155 #define VALID_RVC_J_IMM(x) (EXTRACT_RVC_J_IMM(ENCODE_RVC_J_IMM(x)) == (x))
157 #define RISCV_RTYPE(insn, rd, rs1, rs2) \
158 ((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2))
159 #define RISCV_ITYPE(insn, rd, rs1, imm) \
160 ((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ((rs1) << OP_SH_RS1) | ENCODE_ITYPE_IMM(imm))
161 #define RISCV_STYPE(insn, rs1, rs2, imm) \
162 ((MATCH_ ## insn) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2) | ENCODE_STYPE_IMM(imm))
163 #define RISCV_SBTYPE(insn, rs1, rs2, target) \
164 ((MATCH_ ## insn) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2) | ENCODE_SBTYPE_IMM(target))
165 #define RISCV_UTYPE(insn, rd, bigimm) \
166 ((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ENCODE_UTYPE_IMM(bigimm))
167 #define RISCV_UJTYPE(insn, rd, target) \
168 ((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ENCODE_UJTYPE_IMM(target))
170 #define RISCV_NOP RISCV_ITYPE(ADDI, 0, 0, 0)
171 #define RVC_NOP MATCH_C_ADDI
173 #define RISCV_CONST_HIGH_PART(VALUE) \
174 (((VALUE) + (RISCV_IMM_REACH/2)) & ~(RISCV_IMM_REACH-1))
175 #define RISCV_CONST_LOW_PART(VALUE) ((VALUE) - RISCV_CONST_HIGH_PART (VALUE))
176 #define RISCV_PCREL_HIGH_PART(VALUE, PC) RISCV_CONST_HIGH_PART((VALUE) - (PC))
177 #define RISCV_PCREL_LOW_PART(VALUE, PC) RISCV_CONST_LOW_PART((VALUE) - (PC))
179 #define RISCV_JUMP_BITS RISCV_BIGIMM_BITS
180 #define RISCV_JUMP_ALIGN_BITS 1
181 #define RISCV_JUMP_ALIGN (1 << RISCV_JUMP_ALIGN_BITS)
182 #define RISCV_JUMP_REACH ((1ULL << RISCV_JUMP_BITS) * RISCV_JUMP_ALIGN)
184 #define RISCV_IMM_BITS 12
185 #define RISCV_BIGIMM_BITS (32 - RISCV_IMM_BITS)
186 #define RISCV_IMM_REACH (1LL << RISCV_IMM_BITS)
187 #define RISCV_BIGIMM_REACH (1LL << RISCV_BIGIMM_BITS)
188 #define RISCV_RVC_IMM_REACH (1LL << 6)
189 #define RISCV_BRANCH_BITS RISCV_IMM_BITS
190 #define RISCV_BRANCH_ALIGN_BITS RISCV_JUMP_ALIGN_BITS
191 #define RISCV_BRANCH_ALIGN (1 << RISCV_BRANCH_ALIGN_BITS)
192 #define RISCV_BRANCH_REACH (RISCV_IMM_REACH * RISCV_BRANCH_ALIGN)
196 #define OP_MASK_OP 0x7f
198 #define OP_MASK_RS2 0x1f
200 #define OP_MASK_RS1 0x1f
202 #define OP_MASK_RS3 0x1f
204 #define OP_MASK_RD 0x1f
206 #define OP_MASK_SHAMT 0x3f
207 #define OP_SH_SHAMT 20
208 #define OP_MASK_SHAMTW 0x1f
209 #define OP_SH_SHAMTW 20
210 #define OP_MASK_RM 0x7
212 #define OP_MASK_PRED 0xf
213 #define OP_SH_PRED 24
214 #define OP_MASK_SUCC 0xf
215 #define OP_SH_SUCC 20
216 #define OP_MASK_AQ 0x1
218 #define OP_MASK_RL 0x1
221 #define OP_MASK_CUSTOM_IMM 0x7f
222 #define OP_SH_CUSTOM_IMM 25
223 #define OP_MASK_CSR 0xfff
228 #define OP_MASK_CRS2 0x1f
230 #define OP_MASK_CRS1S 0x7
231 #define OP_SH_CRS1S 7
232 #define OP_MASK_CRS2S 0x7
233 #define OP_SH_CRS2S 2
235 /* ABI names for selected x-registers. */
249 /* Replace bits MASK << SHIFT of STRUCT with the equivalent bits in
250 VALUE << SHIFT. VALUE is evaluated exactly once. */
251 #define INSERT_BITS(STRUCT, VALUE, MASK, SHIFT) \
252 (STRUCT) = (((STRUCT) & ~((insn_t)(MASK) << (SHIFT))) \
253 | ((insn_t)((VALUE) & (MASK)) << (SHIFT)))
255 /* Extract bits MASK << SHIFT from STRUCT and shift them right
257 #define EXTRACT_BITS(STRUCT, MASK, SHIFT) \
258 (((STRUCT) >> (SHIFT)) & (MASK))
260 /* Extract the operand given by FIELD from integer INSN. */
261 #define EXTRACT_OPERAND(FIELD, INSN) \
262 EXTRACT_BITS ((INSN), OP_MASK_##FIELD, OP_SH_##FIELD)
264 /* This structure holds information for a particular instruction. */
268 /* The name of the instruction. */
270 /* The ISA subset name (I, M, A, F, D, Xextension). */
272 /* A string describing the arguments for this instruction. */
274 /* The basic opcode for the instruction. When assembling, this
275 opcode is modified by the arguments to produce the actual opcode
276 that is used. If pinfo is INSN_MACRO, then this is 0. */
278 /* If pinfo is not INSN_MACRO, then this is a bit mask for the
279 relevant portions of the opcode when disassembling. If the
280 actual opcode anded with the match field equals the opcode field,
281 then we have found the correct instruction. If pinfo is
282 INSN_MACRO, then this field is the macro identifier. */
284 /* A function to determine if a word corresponds to this instruction.
285 Usually, this computes ((word & mask) == match). */
286 int (*match_func) (const struct riscv_opcode *op, insn_t word);
287 /* For a macro, this is INSN_MACRO. Otherwise, it is a collection
288 of bits describing the instruction, notably any relevant hazard
293 /* Instruction is a simple alias (e.g. "mv" for "addi"). */
294 #define INSN_ALIAS 0x00000001
295 /* Instruction is actually a macro. It should be ignored by the
296 disassembler, and requires special treatment by the assembler. */
297 #define INSN_MACRO 0xffffffff
299 /* This is a list of macro expanded instructions.
301 _I appended means immediate
302 _A appended means address
303 _AB appended means address with base register
304 _D appended means 64 bit floating point constant
305 _S appended means 32 bit floating point constant. */
335 extern const char * const riscv_gpr_names_numeric[NGPR];
336 extern const char * const riscv_gpr_names_abi[NGPR];
337 extern const char * const riscv_fpr_names_numeric[NFPR];
338 extern const char * const riscv_fpr_names_abi[NFPR];
340 extern const struct riscv_opcode riscv_opcodes[];
342 #endif /* _RISCV_H_ */