1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*
** Bytecode instruction format.
** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
*/
#ifndef _LJ_BC_H
#define _LJ_BC_H
#include "lj_def.h"
#include "lj_arch.h"
/* Bytecode instruction format, 32 bit wide, fields of 8 or 16 bit:
**
** +----+----+----+----+
** | B | C | A | OP | Format ABC
** +----+----+----+----+
** | D | A | OP | Format AD
** +--------------------
** MSB LSB
**
** In-memory instructions are always stored in host byte order.
*/
/* Operand ranges and related constants. */
#define BCMAX_A 0xff
#define BCMAX_B 0xff
#define BCMAX_C 0xff
#define BCMAX_D 0xffff
#define BCBIAS_J 0x8000
#define NO_REG BCMAX_A
#define NO_JMP (~(BCPos)0)
/* Macros to get instruction fields. */
#define bc_op(i) ((BCOp)((i)&0xff))
#define bc_a(i) ((BCReg)(((i)>>8)&0xff))
#define bc_b(i) ((BCReg)((i)>>24))
#define bc_c(i) ((BCReg)(((i)>>16)&0xff))
#define bc_d(i) ((BCReg)((i)>>16))
#define bc_j(i) ((ptrdiff_t)bc_d(i)-BCBIAS_J)
/* Macros to set instruction fields. */
#define setbc_byte(p, x, ofs) \
((uint8_t *)(p))[LJ_ENDIAN_SELECT(ofs, 3-ofs)] = (uint8_t)(x)
#define setbc_op(p, x) setbc_byte(p, (x), 0)
#define setbc_a(p, x) setbc_byte(p, (x), 1)
#define setbc_b(p, x) setbc_byte(p, (x), 3)
#define setbc_c(p, x) setbc_byte(p, (x), 2)
#define setbc_d(p, x) \
((uint16_t *)(p))[LJ_ENDIAN_SELECT(1, 0)] = (uint16_t)(x)
#define setbc_j(p, x) setbc_d(p, (BCPos)((int32_t)(x)+BCBIAS_J))
/* Macros to compose instructions. */
#define BCINS_ABC(o, a, b, c) \
(((BCIns)(o))|((BCIns)(a)<<8)|((BCIns)(b)<<24)|((BCIns)(c)<<16))
#define BCINS_AD(o, a, d) \
(((BCIns)(o))|((BCIns)(a)<<8)|((BCIns)(d)<<16))
#define BCINS_AJ(o, a, j) BCINS_AD(o, a, (BCPos)((int32_t)(j)+BCBIAS_J))
/* Bytecode instruction definition. Order matters, see below.
**
** (name, filler, Amode, Bmode, Cmode or Dmode, metamethod)
**
** The opcode name suffixes specify the type for RB/RC or RD:
** V = variable slot
** S = string const
** N = number const
** P = primitive type (~itype)
** B = unsigned byte literal
** M = multiple args/results
*/
#define BCDEF(_) \
/* Comparison ops. ORDER OPR. */ \
_(ISLT, var, ___, var, lt) \
_(ISGE, var, ___, var, lt) \
_(ISLE, var, ___, var, le) \
_(ISGT, var, ___, var, le) \
\
_(ISEQV, var, ___, var, eq) \
_(ISNEV, var, ___, var, eq) \
_(ISEQS, var, ___, str, eq) \
_(ISNES, var, ___, str, eq) \
_(ISEQN, var, ___, num, eq) \
_(ISNEN, var, ___, num, eq) \
_(ISEQP, var, ___, pri, eq) \
_(ISNEP, var, ___, pri, eq) \
\
/* Unary test and copy ops. */ \
_(ISTC, dst, ___, var, ___) \
_(ISFC, dst, ___, var, ___) \
_(IST, ___, ___, var, ___) \
_(ISF, ___, ___, var, ___) \
_(ISTYPE, var, ___, lit, ___) \
_(ISNUM, var, ___, lit, ___) \
\
/* Unary ops. */ \
_(MOV, dst, ___, var, ___) \
_(NOT, dst, ___, var, ___) \
_(UNM, dst, ___, var, unm) \
_(LEN, dst, ___, var, len) \
\
/* Binary ops. ORDER OPR. VV last, POW must be next. */ \
_(ADDVN, dst, var, num, add) \
_(SUBVN, dst, var, num, sub) \
_(MULVN, dst, var, num, mul) \
_(DIVVN, dst, var, num, div) \
_(MODVN, dst, var, num, mod) \
\
_(ADDNV, dst, var, num, add) \
_(SUBNV, dst, var, num, sub) \
_(MULNV, dst, var, num, mul) \
_(DIVNV, dst, var, num, div) \
_(MODNV, dst, var, num, mod) \
\
_(ADDVV, dst, var, var, add) \
_(SUBVV, dst, var, var, sub) \
_(MULVV, dst, var, var, mul) \
_(DIVVV, dst, var, var, div) \
_(MODVV, dst, var, var, mod) \
\
_(POW, dst, var, var, pow) \
_(CAT, dst, rbase, rbase, concat) \
\
/* Constant ops. */ \
_(KSTR, dst, ___, str, ___) \
_(KCDATA, dst, ___, cdata, ___) \
_(KSHORT, dst, ___, lits, ___) \
_(KNUM, dst, ___, num, ___) \
_(KPRI, dst, ___, pri, ___) \
_(KNIL, base, ___, base, ___) \
\
/* Upvalue and function ops. */ \
_(UGET, dst, ___, uv, ___) \
_(USETV, uv, ___, var, ___) \
_(USETS, uv, ___, str, ___) \
_(USETN, uv, ___, num, ___) \
_(USETP, uv, ___, pri, ___) \
_(UCLO, rbase, ___, jump, ___) \
_(FNEW, dst, ___, func, gc) \
\
/* Table ops. */ \
_(TNEW, dst, ___, lit, gc) \
_(TDUP, dst, ___, tab, gc) \
_(GGET, dst, ___, str, index) \
_(GSET, var, ___, str, newindex) \
_(TGETV, dst, var, var, index) \
_(TGETS, dst, var, str, index) \
_(TGETB, dst, var, lit, index) \
_(TGETR, dst, var, var, index) \
_(TSETV, var, var, var, newindex) \
_(TSETS, var, var, str, newindex) \
_(TSETB, var, var, lit, newindex) \
_(TSETM, base, ___, num, newindex) \
_(TSETR, var, var, var, newindex) \
\
/* Calls and vararg handling. T = tail call. */ \
_(CALLM, base, lit, lit, call) \
_(CALL, base, lit, lit, call) \
_(CALLMT, base, ___, lit, call) \
_(CALLT, base, ___, lit, call) \
_(ITERC, base, lit, lit, call) \
_(ITERN, base, lit, lit, call) \
_(VARG, base, lit, lit, ___) \
_(ISNEXT, base, ___, jump, ___) \
\
/* Returns. */ \
_(RETM, base, ___, lit, ___) \
_(RET, rbase, ___, lit, ___) \
_(RET0, rbase, ___, lit, ___) \
_(RET1, rbase, ___, lit, ___) \
\
/* Loops and branches. I/J = interp/JIT, I/C/L = init/call/loop. */ \
_(FORI, base, ___, jump, ___) \
_(JFORI, base, ___, jump, ___) \
\
_(FORL, base, ___, jump, ___) \
_(IFORL, base, ___, jump, ___) \
_(JFORL, base, ___, lit, ___) \
\
_(ITERL, base, ___, jump, ___) \
_(IITERL, base, ___, jump, ___) \
_(JITERL, base, ___, lit, ___) \
\
_(LOOP, rbase, ___, jump, ___) \
_(ILOOP, rbase, ___, jump, ___) \
_(JLOOP, rbase, ___, lit, ___) \
\
_(JMP, rbase, ___, jump, ___) \
\
/* Function headers. I/J = interp/JIT, F/V/C = fixarg/vararg/C func. */ \
_(FUNCF, rbase, ___, ___, ___) \
_(IFUNCF, rbase, ___, ___, ___) \
_(JFUNCF, rbase, ___, lit, ___) \
_(FUNCV, rbase, ___, ___, ___) \
_(IFUNCV, rbase, ___, ___, ___) \
_(JFUNCV, rbase, ___, lit, ___) \
_(FUNCC, rbase, ___, ___, ___) \
_(FUNCCW, rbase, ___, ___, ___)
/* Bytecode opcode numbers. */
typedef enum {
#define BCENUM(name, ma, mb, mc, mt) BC_##name,
BCDEF(BCENUM)
#undef BCENUM
BC__MAX
} BCOp;
LJ_STATIC_ASSERT((int)BC_ISEQV+1 == (int)BC_ISNEV);
LJ_STATIC_ASSERT(((int)BC_ISEQV^1) == (int)BC_ISNEV);
LJ_STATIC_ASSERT(((int)BC_ISEQS^1) == (int)BC_ISNES);
LJ_STATIC_ASSERT(((int)BC_ISEQN^1) == (int)BC_ISNEN);
LJ_STATIC_ASSERT(((int)BC_ISEQP^1) == (int)BC_ISNEP);
LJ_STATIC_ASSERT(((int)BC_ISLT^1) == (int)BC_ISGE);
LJ_STATIC_ASSERT(((int)BC_ISLE^1) == (int)BC_ISGT);
LJ_STATIC_ASSERT(((int)BC_ISLT^3) == (int)BC_ISGT);
LJ_STATIC_ASSERT((int)BC_IST-(int)BC_ISTC == (int)BC_ISF-(int)BC_ISFC);
LJ_STATIC_ASSERT((int)BC_CALLT-(int)BC_CALL == (int)BC_CALLMT-(int)BC_CALLM);
LJ_STATIC_ASSERT((int)BC_CALLMT + 1 == (int)BC_CALLT);
LJ_STATIC_ASSERT((int)BC_RETM + 1 == (int)BC_RET);
LJ_STATIC_ASSERT((int)BC_FORL + 1 == (int)BC_IFORL);
LJ_STATIC_ASSERT((int)BC_FORL + 2 == (int)BC_JFORL);
LJ_STATIC_ASSERT((int)BC_ITERL + 1 == (int)BC_IITERL);
LJ_STATIC_ASSERT((int)BC_ITERL + 2 == (int)BC_JITERL);
LJ_STATIC_ASSERT((int)BC_LOOP + 1 == (int)BC_ILOOP);
LJ_STATIC_ASSERT((int)BC_LOOP + 2 == (int)BC_JLOOP);
LJ_STATIC_ASSERT((int)BC_FUNCF + 1 == (int)BC_IFUNCF);
LJ_STATIC_ASSERT((int)BC_FUNCF + 2 == (int)BC_JFUNCF);
LJ_STATIC_ASSERT((int)BC_FUNCV + 1 == (int)BC_IFUNCV);
LJ_STATIC_ASSERT((int)BC_FUNCV + 2 == (int)BC_JFUNCV);
/* This solves a circular dependency problem, change as needed. */
#define FF_next_N 4
/* Stack slots used by FORI/FORL, relative to operand A. */
enum {
FORL_IDX, FORL_STOP, FORL_STEP, FORL_EXT
};
/* Bytecode operand modes. ORDER BCMode */
typedef enum {
BCMnone, BCMdst, BCMbase, BCMvar, BCMrbase, BCMuv, /* Mode A must be <= 7 */
BCMlit, BCMlits, BCMpri, BCMnum, BCMstr, BCMtab, BCMfunc, BCMjump, BCMcdata,
BCM_max
} BCMode;
#define BCM___ BCMnone
#define bcmode_a(op) ((BCMode)(lj_bc_mode[op] & 7))
#define bcmode_b(op) ((BCMode)((lj_bc_mode[op]>>3) & 15))
#define bcmode_c(op) ((BCMode)((lj_bc_mode[op]>>7) & 15))
#define bcmode_d(op) bcmode_c(op)
#define bcmode_hasd(op) ((lj_bc_mode[op] & (15<<3)) == (BCMnone<<3))
#define bcmode_mm(op) ((MMS)(lj_bc_mode[op]>>11))
#define BCMODE(name, ma, mb, mc, mm) \
(BCM##ma|(BCM##mb<<3)|(BCM##mc<<7)|(MM_##mm<<11)),
#define BCMODE_FF 0
static LJ_AINLINE int bc_isret(BCOp op)
{
return (op == BC_RETM || op == BC_RET || op == BC_RET0 || op == BC_RET1);
}
LJ_DATA const uint16_t lj_bc_mode[];
LJ_DATA const uint16_t lj_bc_ofs[];
#endif
|
