summaryrefslogtreecommitdiff
path: root/vm_exec.h
blob: c92f715594ebe7717675db591a30ce1a54514aa8 (plain)
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
/**********************************************************************

  vm.h -

  $Author$
  created at: 04/01/01 16:56:59 JST

  Copyright (C) 2004-2007 Koichi Sasada

**********************************************************************/

#ifndef RUBY_VM_EXEC_H
#define RUBY_VM_EXEC_H

typedef long OFFSET;
typedef unsigned long lindex_t;
typedef VALUE GENTRY;
typedef rb_iseq_t *ISEQ;

#ifdef __GCC__
/* TODO: machine dependent prefetch instruction */
#define PREFETCH(pc)
#else
#define PREFETCH(pc)
#endif

#if VMDEBUG > 0
#define debugs printf
#define DEBUG_ENTER_INSN(insn) \
  rb_vmdebug_debug_print_pre(th, GET_CFP());

#if OPT_STACK_CACHING
#define SC_REGS() , reg_a, reg_b
#else
#define SC_REGS()
#endif

#define DEBUG_END_INSN() \
  rb_vmdebug_debug_print_post(th, GET_CFP() SC_REGS());

#else

#define debugs
#define DEBUG_ENTER_INSN(insn)
#define DEBUG_END_INSN()
#endif

#define throwdebug if(0)printf
/* #define throwdebug printf */

/************************************************/
#if defined(DISPATCH_XXX)
error !
/************************************************/
#elif OPT_CALL_THREADED_CODE

#define LABEL(x)  insn_func_##x
#define ELABEL(x)
#define LABEL_PTR(x) &LABEL(x)

#define INSN_ENTRY(insn) \
  static rb_control_frame_t * \
    FUNC_FASTCALL(LABEL(insn))(rb_thread_t *th, rb_control_frame_t *reg_cfp) {

#define END_INSN(insn) return reg_cfp;}

#define NEXT_INSN() return reg_cfp;

/************************************************/
#elif OPT_TOKEN_THREADED_CODE || OPT_DIRECT_THREADED_CODE
/* threaded code with gcc */

#define LABEL(x)  INSN_LABEL_##x
#define ELABEL(x) INSN_ELABEL_##x
#define LABEL_PTR(x) &&LABEL(x)

#define INSN_ENTRY_SIG(insn)


#define INSN_DISPATCH_SIG(insn)

#define INSN_ENTRY(insn) \
  LABEL(insn): \
  INSN_ENTRY_SIG(insn); \

/* dispatcher */
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && __GNUC__ == 3
#define DISPATCH_ARCH_DEPEND_WAY(addr) \
  __asm__ __volatile__("jmp *%0;\t# -- inserted by vm.h\t[length = 2]" : : "r" (addr))

#else
#define DISPATCH_ARCH_DEPEND_WAY(addr) \
				/* do nothing */

#endif


/**********************************/
#if OPT_DIRECT_THREADED_CODE

/* for GCC 3.4.x */
#define TC_DISPATCH(insn) \
  INSN_DISPATCH_SIG(insn); \
  goto *(void const *)GET_CURRENT_INSN(); \
  ;

#else
/* token threaded code */

#define TC_DISPATCH(insn)  \
  DISPATCH_ARCH_DEPEND_WAY(insns_address_table[GET_CURRENT_INSN()]); \
  INSN_DISPATCH_SIG(insn); \
  goto *insns_address_table[GET_CURRENT_INSN()]; \
  rb_bug("tc error");


#endif /* DISPATCH_DIRECT_THREADED_CODE */

#define END_INSN(insn)      \
  DEBUG_END_INSN();         \
  TC_DISPATCH(insn);

#define INSN_DISPATCH()     \
  TC_DISPATCH(__START__)    \
  {

#define END_INSNS_DISPATCH()    \
      rb_bug("unknown insn: %"PRIdVALUE, GET_CURRENT_INSN());   \
  }   /* end of while loop */   \

#define NEXT_INSN() TC_DISPATCH(__NEXT_INSN__)

/************************************************/
#else /* no threaded code */
/* most common method */

#define INSN_ENTRY(insn) \
case BIN(insn):

#define END_INSN(insn)                        \
  DEBUG_END_INSN();                           \
  break;


#define INSN_DISPATCH()         \
  while (1) {			\
    switch (GET_CURRENT_INSN()) {

#define END_INSNS_DISPATCH()    \
default:                        \
  SDR(); \
      rb_bug("unknown insn: %ld", GET_CURRENT_INSN());   \
    } /* end of switch */       \
  }   /* end of while loop */   \

#define NEXT_INSN() goto first

#endif

#define VM_SP_CNT(th, sp) ((sp) - (th)->stack)

#if OPT_CALL_THREADED_CODE
#define THROW_EXCEPTION(exc) do { \
    th->errinfo = (VALUE)(exc); \
    return 0; \
} while (0)
#else
#define THROW_EXCEPTION(exc) return (VALUE)(exc)
#endif

#define SCREG(r) (reg_##r)
#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) do { \
    if (((rb_control_frame_t *)(((cfp)->sp) + (margin)) + 1) >= (cfp)) { \
	rb_bug("CHECK_VM_STACK_OVERFLOW_FOR_INSN: should not overflow here. " \
	       "Please contact ruby-core/dev with your (a part of) script. " \
	       "This check will be removed soon."); \
    } \
} while (0)

#endif /* RUBY_VM_EXEC_H */