Commit | Line | Data |
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39141c87 | 1 | /* Copyright (C) 2001, 2009 Free Software Foundation, Inc. |
17e90c5e | 2 | * |
560b9c25 | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
17e90c5e | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
560b9c25 AW |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
17e90c5e | 12 | * |
560b9c25 AW |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
560b9c25 | 17 | */ |
17e90c5e | 18 | |
13c47753 AW |
19 | #if HAVE_CONFIG_H |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
17e90c5e | 23 | #include <string.h> |
560b9c25 AW |
24 | |
25 | #include "_scm.h" | |
83495480 | 26 | #include "vm-bootstrap.h" |
17e90c5e KN |
27 | #include "instructions.h" |
28 | ||
53e28ed9 AW |
29 | struct scm_instruction { |
30 | enum scm_opcode opcode; /* opcode */ | |
31 | const char *name; /* instruction name */ | |
32 | signed char len; /* Instruction length. This may be -1 for | |
33 | the loader (see the `VM_LOADER' | |
34 | macro). */ | |
35 | signed char npop; /* The number of values popped. This may be | |
36 | -1 for insns like `call' which can take | |
37 | any number of arguments. */ | |
38 | char npush; /* the number of values pushed */ | |
f775e51b | 39 | SCM symname; /* filled in later */ |
17e90c5e KN |
40 | }; |
41 | ||
53e28ed9 AW |
42 | #define SCM_VALIDATE_LOOKUP_INSTRUCTION(pos, var, cvar) \ |
43 | do { \ | |
44 | cvar = scm_lookup_instruction_by_name (var); \ | |
45 | SCM_ASSERT_TYPE (cvar, var, pos, FUNC_NAME, "INSTRUCTION_P"); \ | |
46 | } while (0) | |
17e90c5e | 47 | |
53e28ed9 | 48 | |
f775e51b AW |
49 | static struct scm_instruction* |
50 | fetch_instruction_table () | |
51 | { | |
52 | static struct scm_instruction *table = NULL; | |
53 | ||
54 | if (SCM_UNLIKELY (!table)) | |
55 | { | |
ad47e359 | 56 | size_t bytes = SCM_VM_NUM_INSTRUCTIONS * sizeof(struct scm_instruction); |
f775e51b AW |
57 | int i; |
58 | table = malloc (bytes); | |
59 | memset (table, 0, bytes); | |
60 | #define VM_INSTRUCTION_TO_TABLE 1 | |
aeeff258 AW |
61 | #include <libguile/vm-expand.h> |
62 | #include <libguile/vm-i-system.i> | |
63 | #include <libguile/vm-i-scheme.i> | |
64 | #include <libguile/vm-i-loader.i> | |
f775e51b | 65 | #undef VM_INSTRUCTION_TO_TABLE |
ad47e359 | 66 | for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++) |
f775e51b AW |
67 | { |
68 | table[i].opcode = i; | |
69 | if (table[i].name) | |
f39448c5 | 70 | table[i].symname = scm_from_locale_symbol (table[i].name); |
f775e51b AW |
71 | else |
72 | table[i].symname = SCM_BOOL_F; | |
73 | } | |
74 | } | |
75 | return table; | |
76 | } | |
77 | ||
53e28ed9 AW |
78 | static struct scm_instruction * |
79 | scm_lookup_instruction_by_name (SCM name) | |
17e90c5e | 80 | { |
f775e51b AW |
81 | static SCM instructions_by_name = SCM_BOOL_F; |
82 | struct scm_instruction *table = fetch_instruction_table (); | |
83 | SCM op; | |
84 | ||
5c8cefe5 LC |
85 | if (SCM_UNLIKELY (scm_is_false (instructions_by_name))) |
86 | { | |
87 | unsigned int i; | |
88 | ||
89 | instructions_by_name = | |
90 | scm_make_hash_table (SCM_I_MAKINUM (SCM_VM_NUM_INSTRUCTIONS)); | |
91 | ||
ad47e359 | 92 | for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++) |
f775e51b AW |
93 | if (scm_is_true (table[i].symname)) |
94 | scm_hashq_set_x (instructions_by_name, table[i].symname, | |
95 | SCM_I_MAKINUM (i)); | |
f775e51b | 96 | } |
5c8cefe5 | 97 | |
f775e51b AW |
98 | op = scm_hashq_ref (instructions_by_name, name, SCM_UNDEFINED); |
99 | if (SCM_I_INUMP (op)) | |
100 | return &table[SCM_I_INUM (op)]; | |
101 | ||
102 | return NULL; | |
17e90c5e KN |
103 | } |
104 | ||
53e28ed9 | 105 | |
17e90c5e KN |
106 | /* Scheme interface */ |
107 | ||
108 | SCM_DEFINE (scm_instruction_list, "instruction-list", 0, 0, 0, | |
109 | (void), | |
110 | "") | |
111 | #define FUNC_NAME s_scm_instruction_list | |
112 | { | |
113 | SCM list = SCM_EOL; | |
39141c87 AW |
114 | int i; |
115 | struct scm_instruction *ip = fetch_instruction_table (); | |
ad47e359 | 116 | for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++) |
39141c87 AW |
117 | if (ip[i].name) |
118 | list = scm_cons (ip[i].symname, list); | |
17e90c5e KN |
119 | return scm_reverse_x (list, SCM_EOL); |
120 | } | |
121 | #undef FUNC_NAME | |
122 | ||
123 | SCM_DEFINE (scm_instruction_p, "instruction?", 1, 0, 0, | |
124 | (SCM obj), | |
125 | "") | |
126 | #define FUNC_NAME s_scm_instruction_p | |
127 | { | |
5c8cefe5 | 128 | return scm_from_bool (scm_lookup_instruction_by_name (obj) != NULL); |
17e90c5e KN |
129 | } |
130 | #undef FUNC_NAME | |
131 | ||
132 | SCM_DEFINE (scm_instruction_length, "instruction-length", 1, 0, 0, | |
133 | (SCM inst), | |
134 | "") | |
135 | #define FUNC_NAME s_scm_instruction_length | |
136 | { | |
53e28ed9 AW |
137 | struct scm_instruction *ip; |
138 | SCM_VALIDATE_LOOKUP_INSTRUCTION (1, inst, ip); | |
139 | return SCM_I_MAKINUM (ip->len); | |
46cd9a34 KN |
140 | } |
141 | #undef FUNC_NAME | |
142 | ||
143 | SCM_DEFINE (scm_instruction_pops, "instruction-pops", 1, 0, 0, | |
144 | (SCM inst), | |
145 | "") | |
146 | #define FUNC_NAME s_scm_instruction_pops | |
147 | { | |
53e28ed9 AW |
148 | struct scm_instruction *ip; |
149 | SCM_VALIDATE_LOOKUP_INSTRUCTION (1, inst, ip); | |
150 | return SCM_I_MAKINUM (ip->npop); | |
46cd9a34 KN |
151 | } |
152 | #undef FUNC_NAME | |
153 | ||
154 | SCM_DEFINE (scm_instruction_pushes, "instruction-pushes", 1, 0, 0, | |
155 | (SCM inst), | |
156 | "") | |
157 | #define FUNC_NAME s_scm_instruction_pushes | |
158 | { | |
53e28ed9 AW |
159 | struct scm_instruction *ip; |
160 | SCM_VALIDATE_LOOKUP_INSTRUCTION (1, inst, ip); | |
161 | return SCM_I_MAKINUM (ip->npush); | |
17e90c5e KN |
162 | } |
163 | #undef FUNC_NAME | |
164 | ||
165 | SCM_DEFINE (scm_instruction_to_opcode, "instruction->opcode", 1, 0, 0, | |
166 | (SCM inst), | |
167 | "") | |
168 | #define FUNC_NAME s_scm_instruction_to_opcode | |
169 | { | |
53e28ed9 AW |
170 | struct scm_instruction *ip; |
171 | SCM_VALIDATE_LOOKUP_INSTRUCTION (1, inst, ip); | |
172 | return SCM_I_MAKINUM (ip->opcode); | |
17e90c5e KN |
173 | } |
174 | #undef FUNC_NAME | |
175 | ||
176 | SCM_DEFINE (scm_opcode_to_instruction, "opcode->instruction", 1, 0, 0, | |
177 | (SCM op), | |
178 | "") | |
179 | #define FUNC_NAME s_scm_opcode_to_instruction | |
180 | { | |
53e28ed9 | 181 | int opcode; |
f775e51b | 182 | SCM ret = SCM_BOOL_F; |
53e28ed9 | 183 | |
62082959 | 184 | SCM_MAKE_VALIDATE (1, op, I_INUMP); |
53e28ed9 AW |
185 | opcode = SCM_I_INUM (op); |
186 | ||
ad47e359 | 187 | if (opcode >= 0 && opcode < SCM_VM_NUM_INSTRUCTIONS) |
f775e51b AW |
188 | ret = fetch_instruction_table ()[opcode].symname; |
189 | ||
190 | if (scm_is_false (ret)) | |
191 | scm_wrong_type_arg_msg (FUNC_NAME, 1, op, "INSTRUCTION_P"); | |
53e28ed9 | 192 | |
f775e51b | 193 | return ret; |
17e90c5e KN |
194 | } |
195 | #undef FUNC_NAME | |
196 | ||
07e56b27 AW |
197 | void |
198 | scm_bootstrap_instructions (void) | |
199 | { | |
60ae5ca2 AW |
200 | scm_c_register_extension ("libguile", "scm_init_instructions", |
201 | (scm_t_extension_init_func)scm_init_instructions, | |
202 | NULL); | |
07e56b27 AW |
203 | } |
204 | ||
17e90c5e KN |
205 | void |
206 | scm_init_instructions (void) | |
207 | { | |
07e56b27 AW |
208 | scm_bootstrap_vm (); |
209 | ||
17e90c5e | 210 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 211 | #include "libguile/instructions.x" |
17e90c5e KN |
212 | #endif |
213 | } | |
214 | ||
215 | /* | |
216 | Local Variables: | |
217 | c-file-style: "gnu" | |
218 | End: | |
219 | */ |