/[dynamips]/upstream/dynamips-0.2.5/insn_lookup.h
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Contents of /upstream/dynamips-0.2.5/insn_lookup.h

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Revision 1 - (show annotations)
Sat Oct 6 16:01:44 2007 UTC (12 years, 1 month ago) by dpavlin
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File size: 2773 byte(s)
import 0.2.5 from upstream

1 /*
2 * Cisco 7200 (Predator) simulation platform.
3 * Copyright (c) 2006 Christophe Fillot (cf@utc.fr)
4 *
5 * MIPS Instruction Lookup Tables.
6 */
7
8 #ifndef __INSN_LOOKUP_H__
9 #define __INSN_LOOKUP_H__
10
11 #include "utils.h"
12 #include "hash.h"
13 #include "mips64.h"
14 #include "dynamips.h"
15
16 /* Forward declaration for instruction lookup table */
17 typedef struct insn_lookup insn_lookup_t;
18
19 /* CBM (Class BitMap) array */
20 #define CBM_SHIFT 5 /* log2(32) */
21 #define CBM_SIZE (1 << CBM_SHIFT) /* Arrays of 32-bits Integers */
22 #define CBM_HASH_SIZE 256 /* Size for Hash Tables */
23
24 typedef struct cbm_array cbm_array_t;
25 struct cbm_array {
26 int nr_entries; /* Number of entries */
27 int tab[0]; /* Values... */
28 };
29
30 #define CBM_ARRAY(array,i) ((array)->tab[(i)])
31 #define CBM_CSIZE(count) (((count)*sizeof(int))+sizeof(cbm_array_t))
32
33 /* callback function prototype for instruction checking */
34 typedef int (*ilt_check_cbk_t)(void *,int value);
35 typedef void *(*ilt_get_insn_cbk_t)(int index);
36
37 /* RFC (Recursive Flow Classification) arrays */
38 #define RFC_ARRAY_MAXSIZE 65536
39 #define RFC_ARRAY_MAXBITS 16
40 #define RFC_ARRAY_NUMBER 3
41
42 typedef struct rfc_array rfc_array_t;
43 struct rfc_array {
44 rfc_array_t *parent0,*parent1;
45 int nr_elements;
46
47 /* Number of Equivalent ID */
48 int nr_eqid;
49
50 /* Hash Table for Class Bitmaps */
51 hash_table_t *cbm_hash;
52
53 /* Array to get Class Bitmaps from IDs */
54 cbm_array_t **id2cbm;
55
56 /* Equivalent ID (eqID) array */
57 int eqID[0];
58 };
59
60 /* Equivalent Classes */
61 typedef struct rfc_eqclass rfc_eqclass_t;
62 struct rfc_eqclass {
63 cbm_array_t *cbm; /* Class Bitmap */
64 int eqID; /* Index associated to this class */
65 };
66
67 /* Instruction lookup table */
68 struct insn_lookup {
69 int nr_insn; /* Number of instructions */
70 int cbm_size; /* Size of Class Bitmaps */
71
72 ilt_get_insn_cbk_t get_insn;
73 ilt_check_cbk_t chk_lo,chk_hi;
74
75 /* RFC tables */
76 rfc_array_t *rfct[RFC_ARRAY_NUMBER];
77 };
78
79 /* Instruction lookup */
80 static forced_inline int ilt_get_index(rfc_array_t *a1,rfc_array_t *a2,
81 int i1,int i2)
82 {
83 return((a1->eqID[i1]*a2->nr_eqid) + a2->eqID[i2]);
84 }
85
86 static forced_inline int ilt_get_idx(insn_lookup_t *ilt,int a1,int a2,
87 int i1,int i2)
88 {
89 return(ilt_get_index(ilt->rfct[a1],ilt->rfct[a2],i1,i2));
90 }
91
92 static forced_inline int ilt_lookup(insn_lookup_t *ilt,mips_insn_t insn)
93 {
94 int id_i;
95
96 id_i = ilt_get_idx(ilt,0,1,insn >> 16,insn & 0xFFFF);
97 return(ilt->rfct[2]->eqID[id_i]);
98 }
99
100 /* Create an instruction lookup table */
101 insn_lookup_t *ilt_create(int nr_insn,ilt_get_insn_cbk_t get_insn,
102 ilt_check_cbk_t chk_lo,ilt_check_cbk_t chk_hi);
103
104 #endif

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