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
|
/*
* rpiz - https://github.com/bp0/rpiz
* Copyright (C) 2017 Burt P. <pburt0@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "riscv_data.h"
static struct {
char *name, *meaning;
} tab_ext_meaning[] = {
{ "rv32", "32-bit" },
{ "rv64", "64-bit" },
{ "rv128", "128-bit" },
{ "rv_E", "Base embedded integer instructions (15 registers)" },
{ "rv_I", "Base integer instructions (31 registers)" },
{ "rv_M", "Hardware integer multiply and divide" },
{ "rv_A", "Atomic memory operations" },
{ "rv_C", "Compressed 16-bit instructions" },
{ "rv_F", "Floating-point instructions, single-precision" },
{ "rv_D", "Floating-point instructions, double-precision" },
{ "rv_Q", "Floating-point instructions, quad-precision" },
{ "rv_B", "Bit manipulation instructions" },
{ "rv_V", "Vector operations" },
{ "rv_T", "Transactional memory" },
{ "rv_P", "Packed SIMD instructions" },
{ "rv_L", "Decimal floating-point instructions" },
{ "rv_J", "Dynamically translated languages" },
{ "rv_N", "User-level interrupts" },
{ NULL, NULL }
};
const char *riscv_ext_meaning(const char *ext) {
int i = 0, l = 0;
char *c = NULL;
if (ext) {
c = strchr(ext, ':'); /* allow extension:version, ignore version */
if (c != NULL)
l = c - ext;
else
l = strlen(ext);
while(tab_ext_meaning[i].name != NULL) {
if (strncmp(tab_ext_meaning[i].name, ext, l) == 0)
return tab_ext_meaning[i].meaning;
i++;
}
}
return NULL;
}
/* see RISC-V spec 2.2: Chapter 22: ISA Subset Naming Conventions */
#define FSTR_SIZE 1024
#define EAT_VERSION() if (isdigit(*ps)) while(isdigit(*ps) || *ps == 'p' ) { ps++; };
#define CP_EXT_FLAG() while(*ps != 0 && *ps != '_' && *ps != ' ') { if (isdigit(*ps)) { EAT_VERSION(); break; } *pd = *ps; ps++; pd++; }; *pd = ' '; pd++;
#define ADD_EXT_FLAG(ext) l = strlen(ext); strncpy(pd, ext " ", l + 1); pd += l + 1;
char *riscv_isa_to_flags(const char *isa) {
char *flags = NULL, *ps = (char*)isa, *pd = NULL;
char ext[64] = "", ver[64] = "";
int l = 0;
if (isa) {
flags = malloc(FSTR_SIZE);
if (flags) {
memset(flags, 0, FSTR_SIZE);
pd = flags;
if ( strncmp(ps, "rv", 2) == 0
|| strncmp(ps, "RV", 2) == 0 ) {
ps += 2;
}
if ( strncmp(ps, "32", 2) == 0 ) {
ADD_EXT_FLAG("rv32");
ps += 2;
} else if ( strncmp(ps, "64", 2) == 0 ) {
ADD_EXT_FLAG("rv64");
ps += 2;
} else if ( strncmp(ps, "128", 3) == 0) {
ADD_EXT_FLAG("rv128");
ps += 3;
}
while (*ps != 0) {
switch(*ps) {
case 'G': case 'g': /* G = IMAFD */
ADD_EXT_FLAG("rv_I");
ADD_EXT_FLAG("rv_M");
ADD_EXT_FLAG("rv_A");
ADD_EXT_FLAG("rv_F");
ADD_EXT_FLAG("rv_D");
break;
case 'E': case 'e': ADD_EXT_FLAG("rv_E"); break;
case 'I': case 'i': ADD_EXT_FLAG("rv_I"); break;
case 'M': case 'm': ADD_EXT_FLAG("rv_M"); break;
case 'A': case 'a': ADD_EXT_FLAG("rv_A"); break;
case 'C': case 'c': ADD_EXT_FLAG("rv_C"); break;
case 'F': case 'f': ADD_EXT_FLAG("rv_F"); break;
case 'D': case 'd': ADD_EXT_FLAG("rv_D"); break;
case 'Q': case 'q': ADD_EXT_FLAG("rv_Q"); break;
case 'P': case 'p': ADD_EXT_FLAG("rv_P"); break;
case 'B': case 'b': ADD_EXT_FLAG("rv_B"); break;
case 'V': case 'v': ADD_EXT_FLAG("rv_V"); break;
case 'J': case 'j': ADD_EXT_FLAG("rv_J"); break;
case 'N': case 'n': ADD_EXT_FLAG("rv_N"); break;
case 'S': case 's': CP_EXT_FLAG(); break; /* supervisor extension */
case 'X': case 'x': CP_EXT_FLAG(); break; /* custom extension */
/* custom supervisor extension (SX..) handled by S */
default: break;
}
ps++;
EAT_VERSION();
}
}
}
return flags;
}
|
