/
vm_exec.c
143 lines (114 loc) · 2.73 KB
/
vm_exec.c
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
/* -*-c-*- */
/**********************************************************************
vm_exec.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include <math.h>
#if VMDEBUG > 0
#define DECL_SC_REG(type, r, reg) register type reg_##r
#elif defined(__GNUC__) && defined(_x86_64__)
#define DECL_SC_REG(type, r, reg) register type reg_##r __asm__("r" reg)
#elif defined(__GNUC__) && defined(__i386__)
#define DECL_SC_REG(type, r, reg) register type reg_##r __asm__("e" reg)
#else
#define DECL_SC_REG(type, r, reg) register type reg_##r
#endif
/* #define DECL_SC_REG(r, reg) VALUE reg_##r */
#if !OPT_CALL_THREADED_CODE
static VALUE
vm_exec_core(rb_thread_t *th, VALUE initial)
{
#if OPT_STACK_CACHING
#if 0
#elif __GNUC__ && __x86_64__
DECL_SC_REG(VALUE, a, "12");
DECL_SC_REG(VALUE, b, "13");
#else
register VALUE reg_a;
register VALUE reg_b;
#endif
#endif
#if defined(__GNUC__) && defined(__i386__)
DECL_SC_REG(VALUE *, pc, "di");
DECL_SC_REG(rb_control_frame_t *, cfp, "si");
#define USE_MACHINE_REGS 1
#elif defined(__GNUC__) && defined(__x86_64__)
DECL_SC_REG(VALUE *, pc, "14");
DECL_SC_REG(rb_control_frame_t *, cfp, "15");
#define USE_MACHINE_REGS 1
#else
register rb_control_frame_t *reg_cfp;
VALUE *reg_pc;
#endif
#if USE_MACHINE_REGS
#undef RESTORE_REGS
#define RESTORE_REGS() \
{ \
REG_CFP = th->cfp; \
reg_pc = reg_cfp->pc; \
}
#undef REG_PC
#define REG_PC reg_pc
#undef GET_PC
#define GET_PC() (reg_pc)
#undef SET_PC
#define SET_PC(x) (reg_cfp->pc = REG_PC = (x))
#endif
#if OPT_TOKEN_THREADED_CODE || OPT_DIRECT_THREADED_CODE
#include "vmtc.inc"
if (UNLIKELY(th == 0)) {
return (VALUE)insns_address_table;
}
#endif
reg_cfp = th->cfp;
reg_pc = reg_cfp->pc;
#if OPT_STACK_CACHING
reg_a = initial;
reg_b = 0;
#endif
first:
INSN_DISPATCH();
/*****************/
#include "vm.inc"
/*****************/
END_INSNS_DISPATCH();
/* unreachable */
rb_bug("vm_eval: unreachable");
goto first;
}
const void **
rb_vm_get_insns_address_table(void)
{
return (const void **)vm_exec_core(0, 0);
}
#else /* OPT_CALL_THREADED_CODE */
#include "vm.inc"
#include "vmtc.inc"
const void **
rb_vm_get_insns_address_table(void)
{
return (const void **)insns_address_table;
}
static VALUE
vm_exec_core(rb_thread_t *th, VALUE initial)
{
register rb_control_frame_t *reg_cfp = th->cfp;
while (1) {
reg_cfp = ((rb_insn_func_t) (*GET_PC()))(th, reg_cfp);
if (UNLIKELY(reg_cfp == 0)) {
break;
}
}
if (th->retval != Qundef) {
VALUE ret = th->retval;
th->retval = Qundef;
return ret;
}
else {
VALUE err = th->errinfo;
th->errinfo = Qnil;
return err;
}
}
#endif