1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 * Copyright (C) 2014-2021 Paul Cercueil <paul@crapouillou.net>
6 #ifndef __DISASSEMBLER_H__
7 #define __DISASSEMBLER_H__
11 #include "lightrec-config.h"
14 #define __packed __attribute__((packed))
17 #define BIT(x) (1ULL << (x))
19 /* Flags for all opcodes */
20 #define LIGHTREC_NO_DS BIT(0)
21 #define LIGHTREC_SYNC BIT(1)
23 /* Flags for load/store opcodes */
24 #define LIGHTREC_SMC BIT(2)
25 #define LIGHTREC_NO_INVALIDATE BIT(3)
26 #define LIGHTREC_NO_MASK BIT(4)
28 /* I/O mode for load/store opcodes */
29 #define LIGHTREC_IO_MODE_LSB 5
30 #define LIGHTREC_IO_MODE(x) ((x) << LIGHTREC_IO_MODE_LSB)
31 #define LIGHTREC_IO_UNKNOWN 0x0
32 #define LIGHTREC_IO_DIRECT 0x1
33 #define LIGHTREC_IO_HW 0x2
34 #define LIGHTREC_IO_RAM 0x3
35 #define LIGHTREC_IO_BIOS 0x4
36 #define LIGHTREC_IO_SCRATCH 0x5
37 #define LIGHTREC_IO_MASK LIGHTREC_IO_MODE(0x7)
38 #define LIGHTREC_FLAGS_GET_IO_MODE(x) \
39 (((x) & LIGHTREC_IO_MASK) >> LIGHTREC_IO_MODE_LSB)
41 /* Flags for branches */
42 #define LIGHTREC_EMULATE_BRANCH BIT(2)
43 #define LIGHTREC_LOCAL_BRANCH BIT(3)
45 /* Flags for div/mult opcodes */
46 #define LIGHTREC_NO_LO BIT(2)
47 #define LIGHTREC_NO_HI BIT(3)
48 #define LIGHTREC_NO_DIV_CHECK BIT(4)
50 #define LIGHTREC_REG_RS_LSB 26
51 #define LIGHTREC_REG_RS(x) ((x) << LIGHTREC_REG_RS_LSB)
52 #define LIGHTREC_REG_RS_MASK LIGHTREC_REG_RS(0x3)
53 #define LIGHTREC_FLAGS_GET_RS(x) \
54 (((x) & LIGHTREC_REG_RS_MASK) >> LIGHTREC_REG_RS_LSB)
56 #define LIGHTREC_REG_RT_LSB 28
57 #define LIGHTREC_REG_RT(x) ((x) << LIGHTREC_REG_RT_LSB)
58 #define LIGHTREC_REG_RT_MASK LIGHTREC_REG_RT(0x3)
59 #define LIGHTREC_FLAGS_GET_RT(x) \
60 (((x) & LIGHTREC_REG_RT_MASK) >> LIGHTREC_REG_RT_LSB)
62 #define LIGHTREC_REG_RD_LSB 30
63 #define LIGHTREC_REG_RD(x) ((x) << LIGHTREC_REG_RD_LSB)
64 #define LIGHTREC_REG_RD_MASK LIGHTREC_REG_RD(0x3)
65 #define LIGHTREC_FLAGS_GET_RD(x) \
66 (((x) & LIGHTREC_REG_RD_MASK) >> LIGHTREC_REG_RD_LSB)
68 #define LIGHTREC_REG_NOOP 0x0
69 #define LIGHTREC_REG_UNLOAD 0x1
70 #define LIGHTREC_REG_DISCARD 0x2
71 #define LIGHTREC_REG_CLEAN 0x3
75 enum standard_opcodes {
115 enum special_opcodes {
116 OP_SPECIAL_SLL = 0x00,
117 OP_SPECIAL_SRL = 0x02,
118 OP_SPECIAL_SRA = 0x03,
119 OP_SPECIAL_SLLV = 0x04,
120 OP_SPECIAL_SRLV = 0x06,
121 OP_SPECIAL_SRAV = 0x07,
122 OP_SPECIAL_JR = 0x08,
123 OP_SPECIAL_JALR = 0x09,
124 OP_SPECIAL_SYSCALL = 0x0c,
125 OP_SPECIAL_BREAK = 0x0d,
126 OP_SPECIAL_MFHI = 0x10,
127 OP_SPECIAL_MTHI = 0x11,
128 OP_SPECIAL_MFLO = 0x12,
129 OP_SPECIAL_MTLO = 0x13,
130 OP_SPECIAL_MULT = 0x18,
131 OP_SPECIAL_MULTU = 0x19,
132 OP_SPECIAL_DIV = 0x1a,
133 OP_SPECIAL_DIVU = 0x1b,
134 OP_SPECIAL_ADD = 0x20,
135 OP_SPECIAL_ADDU = 0x21,
136 OP_SPECIAL_SUB = 0x22,
137 OP_SPECIAL_SUBU = 0x23,
138 OP_SPECIAL_AND = 0x24,
139 OP_SPECIAL_OR = 0x25,
140 OP_SPECIAL_XOR = 0x26,
141 OP_SPECIAL_NOR = 0x27,
142 OP_SPECIAL_SLT = 0x2a,
143 OP_SPECIAL_SLTU = 0x2b,
146 enum regimm_opcodes {
147 OP_REGIMM_BLTZ = 0x00,
148 OP_REGIMM_BGEZ = 0x01,
149 OP_REGIMM_BLTZAL = 0x10,
150 OP_REGIMM_BGEZAL = 0x11,
165 enum cp2_basic_opcodes {
166 OP_CP2_BASIC_MFC2 = 0x00,
167 OP_CP2_BASIC_CFC2 = 0x02,
168 OP_CP2_BASIC_MTC2 = 0x04,
169 OP_CP2_BASIC_CTC2 = 0x06,
173 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
191 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
205 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
215 /* Keep in sync with struct opcode */
223 /* Keep this union at the first position */
227 /* Keep in sync with union code */
236 void lightrec_print_disassembly(const struct block *block, const u32 *code);
238 static inline _Bool op_flag_no_ds(u32 flags)
240 return OPT_SWITCH_DELAY_SLOTS && (flags & LIGHTREC_NO_DS);
243 static inline _Bool op_flag_sync(u32 flags)
245 return OPT_LOCAL_BRANCHES && (flags & LIGHTREC_SYNC);
248 static inline _Bool op_flag_smc(u32 flags)
250 return OPT_FLAG_STORES && (flags & LIGHTREC_SMC);
253 static inline _Bool op_flag_no_invalidate(u32 flags)
255 return (OPT_FLAG_IO || OPT_FLAG_STORES) &&
256 (flags & LIGHTREC_NO_INVALIDATE);
259 static inline _Bool op_flag_no_mask(u32 flags)
261 return OPT_FLAG_IO && (flags & LIGHTREC_NO_MASK);
264 static inline _Bool op_flag_emulate_branch(u32 flags)
266 return OPT_DETECT_IMPOSSIBLE_BRANCHES &&
267 (flags & LIGHTREC_EMULATE_BRANCH);
270 static inline _Bool op_flag_local_branch(u32 flags)
272 return OPT_LOCAL_BRANCHES && (flags & LIGHTREC_LOCAL_BRANCH);
275 static inline _Bool op_flag_no_lo(u32 flags)
277 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_LO);
280 static inline _Bool op_flag_no_hi(u32 flags)
282 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_HI);
285 static inline _Bool op_flag_no_div_check(u32 flags)
287 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_DIV_CHECK);
290 #endif /* __DISASSEMBLER_H__ */