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_DIRECT_HW 0x6
38 #define LIGHTREC_IO_MASK LIGHTREC_IO_MODE(0x7)
39 #define LIGHTREC_FLAGS_GET_IO_MODE(x) \
40 (((x) & LIGHTREC_IO_MASK) >> LIGHTREC_IO_MODE_LSB)
42 /* Flags for branches */
43 #define LIGHTREC_EMULATE_BRANCH BIT(2)
44 #define LIGHTREC_LOCAL_BRANCH BIT(3)
46 /* Flags for div/mult opcodes */
47 #define LIGHTREC_NO_LO BIT(2)
48 #define LIGHTREC_NO_HI BIT(3)
49 #define LIGHTREC_NO_DIV_CHECK BIT(4)
51 #define LIGHTREC_REG_RS_LSB 26
52 #define LIGHTREC_REG_RS(x) ((x) << LIGHTREC_REG_RS_LSB)
53 #define LIGHTREC_REG_RS_MASK LIGHTREC_REG_RS(0x3)
54 #define LIGHTREC_FLAGS_GET_RS(x) \
55 (((x) & LIGHTREC_REG_RS_MASK) >> LIGHTREC_REG_RS_LSB)
57 #define LIGHTREC_REG_RT_LSB 28
58 #define LIGHTREC_REG_RT(x) ((x) << LIGHTREC_REG_RT_LSB)
59 #define LIGHTREC_REG_RT_MASK LIGHTREC_REG_RT(0x3)
60 #define LIGHTREC_FLAGS_GET_RT(x) \
61 (((x) & LIGHTREC_REG_RT_MASK) >> LIGHTREC_REG_RT_LSB)
63 #define LIGHTREC_REG_RD_LSB 30
64 #define LIGHTREC_REG_RD(x) ((x) << LIGHTREC_REG_RD_LSB)
65 #define LIGHTREC_REG_RD_MASK LIGHTREC_REG_RD(0x3)
66 #define LIGHTREC_FLAGS_GET_RD(x) \
67 (((x) & LIGHTREC_REG_RD_MASK) >> LIGHTREC_REG_RD_LSB)
69 #define LIGHTREC_REG_NOOP 0x0
70 #define LIGHTREC_REG_UNLOAD 0x1
71 #define LIGHTREC_REG_DISCARD 0x2
72 #define LIGHTREC_REG_CLEAN 0x3
76 enum standard_opcodes {
115 OP_META_MULT2 = 0x19,
116 OP_META_MULTU2 = 0x1a,
119 enum special_opcodes {
120 OP_SPECIAL_SLL = 0x00,
121 OP_SPECIAL_SRL = 0x02,
122 OP_SPECIAL_SRA = 0x03,
123 OP_SPECIAL_SLLV = 0x04,
124 OP_SPECIAL_SRLV = 0x06,
125 OP_SPECIAL_SRAV = 0x07,
126 OP_SPECIAL_JR = 0x08,
127 OP_SPECIAL_JALR = 0x09,
128 OP_SPECIAL_SYSCALL = 0x0c,
129 OP_SPECIAL_BREAK = 0x0d,
130 OP_SPECIAL_MFHI = 0x10,
131 OP_SPECIAL_MTHI = 0x11,
132 OP_SPECIAL_MFLO = 0x12,
133 OP_SPECIAL_MTLO = 0x13,
134 OP_SPECIAL_MULT = 0x18,
135 OP_SPECIAL_MULTU = 0x19,
136 OP_SPECIAL_DIV = 0x1a,
137 OP_SPECIAL_DIVU = 0x1b,
138 OP_SPECIAL_ADD = 0x20,
139 OP_SPECIAL_ADDU = 0x21,
140 OP_SPECIAL_SUB = 0x22,
141 OP_SPECIAL_SUBU = 0x23,
142 OP_SPECIAL_AND = 0x24,
143 OP_SPECIAL_OR = 0x25,
144 OP_SPECIAL_XOR = 0x26,
145 OP_SPECIAL_NOR = 0x27,
146 OP_SPECIAL_SLT = 0x2a,
147 OP_SPECIAL_SLTU = 0x2b,
150 enum regimm_opcodes {
151 OP_REGIMM_BLTZ = 0x00,
152 OP_REGIMM_BGEZ = 0x01,
153 OP_REGIMM_BLTZAL = 0x10,
154 OP_REGIMM_BGEZAL = 0x11,
191 enum cp2_basic_opcodes {
192 OP_CP2_BASIC_MFC2 = 0x00,
193 OP_CP2_BASIC_CFC2 = 0x02,
194 OP_CP2_BASIC_MTC2 = 0x04,
195 OP_CP2_BASIC_CTC2 = 0x06,
199 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
217 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
231 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
241 /* Keep in sync with struct opcode */
249 /* Keep this union at the first position */
253 /* Keep in sync with union code */
267 void lightrec_print_disassembly(const struct block *block, const u32 *code);
269 static inline _Bool op_flag_no_ds(u32 flags)
271 return OPT_SWITCH_DELAY_SLOTS && (flags & LIGHTREC_NO_DS);
274 static inline _Bool op_flag_sync(u32 flags)
276 return OPT_LOCAL_BRANCHES && (flags & LIGHTREC_SYNC);
279 static inline _Bool op_flag_smc(u32 flags)
281 return OPT_FLAG_STORES && (flags & LIGHTREC_SMC);
284 static inline _Bool op_flag_no_invalidate(u32 flags)
286 return (OPT_FLAG_IO || OPT_FLAG_STORES) &&
287 (flags & LIGHTREC_NO_INVALIDATE);
290 static inline _Bool op_flag_no_mask(u32 flags)
292 return OPT_FLAG_IO && (flags & LIGHTREC_NO_MASK);
295 static inline _Bool op_flag_emulate_branch(u32 flags)
297 return OPT_DETECT_IMPOSSIBLE_BRANCHES &&
298 (flags & LIGHTREC_EMULATE_BRANCH);
301 static inline _Bool op_flag_local_branch(u32 flags)
303 return OPT_LOCAL_BRANCHES && (flags & LIGHTREC_LOCAL_BRANCH);
306 static inline _Bool op_flag_no_lo(u32 flags)
308 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_LO);
311 static inline _Bool op_flag_no_hi(u32 flags)
313 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_HI);
316 static inline _Bool op_flag_no_div_check(u32 flags)
318 return OPT_FLAG_MULT_DIV && (flags & LIGHTREC_NO_DIV_CHECK);
321 #endif /* __DISASSEMBLER_H__ */