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/*
* 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 <ctype.h>
#include "riscv_data.h"
#ifndef C_
#define C_(Ctx, String) String
#endif
#ifndef NC_
#define NC_(Ctx, String) String
#endif
static struct {
char *name, *meaning;
} tab_ext_meaning[] = {
{ "RV32", NC_("rv-ext", /*/ext:RV32*/ "RISC-V 32-bit") },
{ "RV64", NC_("rv-ext", /*/ext:RV64*/ "RISC-V 64-bit") },
{ "RV128", NC_("rv-ext", /*/ext:RV128*/ "RISC-V 128-bit") },
{ "E", NC_("rv-ext", /*/ext:E*/ "Base embedded integer instructions (15 registers)") },
{ "I", NC_("rv-ext", /*/ext:I*/ "Base integer instructions (31 registers)") },
{ "M", NC_("rv-ext", /*/ext:M*/ "Hardware integer multiply and divide") },
{ "A", NC_("rv-ext", /*/ext:A*/ "Atomic memory operations") },
{ "C", NC_("rv-ext", /*/ext:C*/ "Compressed 16-bit instructions") },
{ "F", NC_("rv-ext", /*/ext:F*/ "Floating-point instructions, single-precision") },
{ "D", NC_("rv-ext", /*/ext:D*/ "Floating-point instructions, double-precision") },
{ "Q", NC_("rv-ext", /*/ext:Q*/ "Floating-point instructions, quad-precision") },
{ "B", NC_("rv-ext", /*/ext:B*/ "Bit manipulation instructions") },
{ "V", NC_("rv-ext", /*/ext:V*/ "Vector operations") },
{ "Zk", NC_("rv-ext", /*/ext:Zk*/ "Scalar Cryptography") },
{ "S", NC_("rv-ext", /*/ext:S*/ "Supervisor-level Instructions") },
{ "U", NC_("rv-ext", /*/ext:U*/ "User Mode") },
{ "T", NC_("rv-ext", /*/ext:T*/ "Transactional memory") },
{ "P", NC_("rv-ext", /*/ext:P*/ "Packed SIMD instructions") },
{ "L", NC_("rv-ext", /*/ext:L*/ "Decimal floating-point instructions") },
{ "J", NC_("rv-ext", /*/ext:J*/ "Dynamically translated languages") },
{ "N", NC_("rv-ext", /*/ext:N*/ "User-level interrupts") },
{ NULL, NULL }
};
static char all_extensions[1024] = "";
#define APPEND_EXT(f) strcat(all_extensions, f); strcat(all_extensions, " ");
const char *riscv_ext_list() {
int i = 0, built = 0;
built = strlen(all_extensions);
if (!built) {
while(tab_ext_meaning[i].name != NULL) {
APPEND_EXT(tab_ext_meaning[i].name);
i++;
}
}
return all_extensions;
}
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 (strncasecmp(tab_ext_meaning[i].name, ext, l) == 0) {
if (tab_ext_meaning[i].meaning != NULL)
return C_("rv-ext", tab_ext_meaning[i].meaning);
else return NULL;
}
i++;
}
}
return NULL;
}
/* see RISC-V spec 2.2: Chapter 22: ISA Subset Naming Conventions */
/* Spec says case-insensitive, but I prefer single-letter extensions
* capped and version string (like "2p1") with a lowercase p. */
#define RV_FIX_CASE(fstr,vo) \
p = fstr; while (*p != 0 && *p != ':') { if (!vo) *p = toupper(*p); p++; } \
if (*p == ':') while (*p != 0) { if (*p == 'P') *p = 'p'; p++; }
static int riscv_isa_next(const char *isap, char *flag) {
char *p = NULL, *start = NULL;
char *next_sep = NULL, *next_digit = NULL;
int skip_len = 0, tag_len = 0, ver_len = 0;
char ext_str[32], ver_str[32];
if (isap == NULL)
return 0;
/* find start by skipping any '_' */
start = (char*)isap;
while (*start != 0 && *start == '_') { start++; skip_len++; };
if (*start == 0)
return 0;
/* find next '_' or \0 */
p = start; while (*p != 0 && *p != '_') { p++; }; next_sep = p;
/* find next digit that may be a version, find length of version */
p = start; while (*p != 0 && !isdigit(*p)) { p++; };
if (isdigit(*p)) next_digit = p;
if (next_digit) {
while (*p != 0 && (isdigit(*p) || *p == 'p' || *p == 'P') ) {
if ((*p == 'p' || *p == 'P') && !isdigit(*(p+1)) )
break;
ver_len++;
p++;
}
}
/* is next version nearer than next separator */
p = start;
if (next_digit && next_digit < next_sep)
tag_len = next_digit - p;
else {
tag_len = next_sep - p;
ver_len = 0;
}
switch(*p) {
case 'S': case 's': /* supervisor extension */
case 'X': case 'x': /* custom extension */
/* custom supervisor extension (SX..) handled by S */
break;
default: /* single character (standard) extension */
tag_len = 1;
if (next_digit != p+1) ver_len = 0;
break;
}
memset(ext_str, 0, 32);
memset(ver_str, 0, 32);
if (ver_len) {
strncpy(ext_str, p, tag_len);
strncpy(ver_str, next_digit, ver_len);
sprintf(flag, "%s:%s", ext_str, ver_str);
if (tag_len == 1) {
RV_FIX_CASE(flag, 0);
} else {
RV_FIX_CASE(flag, 1);
}
return skip_len + tag_len + ver_len;
} else {
strncpy(ext_str, p, tag_len);
sprintf(flag, "%s", ext_str);
if (tag_len == 1) { RV_FIX_CASE(flag, 0); }
return skip_len + tag_len;
}
}
#define FSTR_SIZE 1024
#define RV_CHECK_FOR(e) ( strncasecmp(ps, e, 2) == 0 )
#define ADD_EXT_FLAG(ext) el = strlen(ext); strncpy(pd, ext, el); strncpy(pd + el, " ", 1); pd += el + 1;
char *riscv_isa_to_flags(const char *isa) {
char *flags = NULL, *ps = (char*)isa, *pd = NULL;
char flag_buf[64] = "";
int isa_len = 0, tl = 0, el = 0; /* el used in macro */
if (isa) {
isa_len = strlen(isa);
flags = malloc(FSTR_SIZE);
if (flags) {
memset(flags, 0, FSTR_SIZE);
ps = (char*)isa;
pd = flags;
if ( RV_CHECK_FOR("RV") )
{ ps += 2; }
if ( RV_CHECK_FOR("32") )
{ ADD_EXT_FLAG("RV32"); ps += 2; }
else if ( RV_CHECK_FOR("64") )
{ ADD_EXT_FLAG("RV64"); ps += 2; }
else if ( RV_CHECK_FOR("128") )
{ ADD_EXT_FLAG("RV128"); ps += 3; }
while( (tl = riscv_isa_next(ps, flag_buf)) ) {
if (flag_buf[0] == 'G') { /* G = IMAFD */
flag_buf[0] = 'I'; ADD_EXT_FLAG(flag_buf);
flag_buf[0] = 'M'; ADD_EXT_FLAG(flag_buf);
flag_buf[0] = 'A'; ADD_EXT_FLAG(flag_buf);
flag_buf[0] = 'F'; ADD_EXT_FLAG(flag_buf);
flag_buf[0] = 'D'; ADD_EXT_FLAG(flag_buf);
} else {
ADD_EXT_FLAG(flag_buf);
}
ps += tl;
if (ps - isa >= isa_len) break; /* just in case */
}
}
}
return flags;
}
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