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#include "isa_parser.h"
#include "extension.h"
static std::string strtolower(const char* str)
{
std::string res;
for (const char *r = str; *r; r++)
res += std::tolower(*r);
return res;
}
static void bad_option_string(const char *option, const char *value,
const char *msg)
{
fprintf(stderr, "error: bad %s option '%s'. %s\n", option, value, msg);
abort();
}
static void bad_isa_string(const char* isa, const char* msg)
{
bad_option_string("--isa", isa, msg);
}
static void bad_priv_string(const char* priv)
{
fprintf(stderr, "error: bad --priv option %s\n", priv);
abort();
}
isa_parser_t::isa_parser_t(const char* str, const char *priv)
: extension_table(256, false)
{
isa_string = strtolower(str);
const char* all_subsets = "mafdqchpv";
max_isa = reg_t(2) << 62;
// enable zicntr and zihpm unconditionally for backward compatibility
extension_table[EXT_ZICNTR] = true;
extension_table[EXT_ZIHPM] = true;
if (isa_string.compare(0, 4, "rv32") == 0)
max_xlen = 32, max_isa = reg_t(1) << 30;
else if (isa_string.compare(0, 4, "rv64") == 0)
max_xlen = 64;
else
bad_isa_string(str, "ISA strings must begin with RV32 or RV64");
switch (isa_string[4]) {
case 'g':
// G = IMAFD_Zicsr_Zifencei, but Spike includes the latter two
// unconditionally, so they need not be explicitly added here.
isa_string = isa_string.substr(0, 4) + "imafd" + isa_string.substr(5);
// Fall through
case 'i':
max_isa |= 1L << ('i' - 'a');
break;
case 'e':
max_isa |= 1L << ('e' - 'a');
break;
default:
bad_isa_string(str, ("'" + isa_string.substr(0, 4) + "' must be followed by I, E, or G").c_str());
}
const char* isa_str = isa_string.c_str();
auto p = isa_str, subset = all_subsets;
for (p += 5; islower(*p) && !strchr("zsx", *p); ++p) {
while (*subset && (*p != *subset))
++subset;
if (!*subset) {
if (strchr(all_subsets, *p))
bad_isa_string(str, ("Extension '" + std::string(1, *p) + "' appears too late in ISA string").c_str());
else
bad_isa_string(str, ("Unsupported extension '" + std::string(1, *p) + "'").c_str());
}
switch (*p) {
case 'p': extension_table[EXT_ZBPBO] = true;
extension_table[EXT_ZPN] = true;
extension_table[EXT_ZPSFOPERAND] = true;
extension_table[EXT_ZMMUL] = true; break;
case 'v': // even rv32iv implies double float
case 'q': max_isa |= 1L << ('d' - 'a');
// Fall through
case 'd': max_isa |= 1L << ('f' - 'a');
}
max_isa |= 1L << (*p - 'a');
extension_table[toupper(*p)] = true;
while (isdigit(*(p + 1))) {
++p; // skip major version, point, and minor version if presented
if (*(p + 1) == 'p') ++p;
}
p += *(p + 1) == '_'; // underscores may be used to improve readability
}
while (islower(*p) || (*p == '_')) {
p += *p == '_'; // first underscore is optional
auto end = p;
do ++end; while (*end && *end != '_');
auto ext_str = std::string(p, end);
if (ext_str == "zfh" || ext_str == "zfhmin") {
if (!((max_isa >> ('f' - 'a')) & 1))
bad_isa_string(str, ("'" + ext_str + "' extension requires 'F'").c_str());
extension_table[EXT_ZFHMIN] = true;
if (ext_str == "zfh")
extension_table[EXT_ZFH] = true;
} else if (ext_str == "zicsr") {
// Spike necessarily has Zicsr, because
// Zicsr is implied by the privileged architecture
} else if (ext_str == "zifencei") {
// For compatibility with version 2.0 of the base ISAs, we
// unconditionally include FENCE.I, so Zifencei adds nothing more.
} else if (ext_str == "zihintpause") {
// HINTs encoded in base-ISA instructions are always present.
} else if (ext_str == "zmmul") {
extension_table[EXT_ZMMUL] = true;
} else if (ext_str == "zba") {
extension_table[EXT_ZBA] = true;
} else if (ext_str == "zbb") {
extension_table[EXT_ZBB] = true;
} else if (ext_str == "zbc") {
extension_table[EXT_ZBC] = true;
} else if (ext_str == "zbs") {
extension_table[EXT_ZBS] = true;
} else if (ext_str == "zbkb") {
extension_table[EXT_ZBKB] = true;
} else if (ext_str == "zbkc") {
extension_table[EXT_ZBKC] = true;
} else if (ext_str == "zbkx") {
extension_table[EXT_ZBKX] = true;
} else if (ext_str == "zk") {
extension_table[EXT_ZBKB] = true;
extension_table[EXT_ZBKC] = true;
extension_table[EXT_ZBKX] = true;
extension_table[EXT_ZKND] = true;
extension_table[EXT_ZKNE] = true;
extension_table[EXT_ZKNH] = true;
extension_table[EXT_ZKR] = true;
} else if (ext_str == "zkn") {
extension_table[EXT_ZBKB] = true;
extension_table[EXT_ZBKC] = true;
extension_table[EXT_ZBKX] = true;
extension_table[EXT_ZKND] = true;
extension_table[EXT_ZKNE] = true;
extension_table[EXT_ZKNH] = true;
} else if (ext_str == "zknd") {
extension_table[EXT_ZKND] = true;
} else if (ext_str == "zkne") {
extension_table[EXT_ZKNE] = true;
} else if (ext_str == "zknh") {
extension_table[EXT_ZKNH] = true;
} else if (ext_str == "zks") {
extension_table[EXT_ZBKB] = true;
extension_table[EXT_ZBKC] = true;
extension_table[EXT_ZBKX] = true;
extension_table[EXT_ZKSED] = true;
extension_table[EXT_ZKSH] = true;
} else if (ext_str == "zksed") {
extension_table[EXT_ZKSED] = true;
} else if (ext_str == "zksh") {
extension_table[EXT_ZKSH] = true;
} else if (ext_str == "zkr") {
extension_table[EXT_ZKR] = true;
} else if (ext_str == "zkt") {
} else if (ext_str == "smepmp") {
extension_table[EXT_SMEPMP] = true;
} else if (ext_str == "smstateen") {
extension_table[EXT_SMSTATEEN] = true;
} else if (ext_str == "svnapot") {
extension_table[EXT_SVNAPOT] = true;
} else if (ext_str == "svpbmt") {
extension_table[EXT_SVPBMT] = true;
} else if (ext_str == "svinval") {
extension_table[EXT_SVINVAL] = true;
} else if (ext_str == "zicbom") {
extension_table[EXT_ZICBOM] = true;
} else if (ext_str == "zicboz") {
extension_table[EXT_ZICBOZ] = true;
} else if (ext_str == "zicbop") {
} else if (ext_str == "zicntr") {
} else if (ext_str == "zihpm") {
} else if (ext_str == "sstc") {
extension_table[EXT_SSTC] = true;
} else if (ext_str[0] == 'x') {
max_isa |= 1L << ('x' - 'a');
extension_table[toupper('x')] = true;
if (ext_str == "xbitmanip") {
extension_table[EXT_XZBP] = true;
extension_table[EXT_XZBS] = true;
extension_table[EXT_XZBE] = true;
extension_table[EXT_XZBF] = true;
extension_table[EXT_XZBC] = true;
extension_table[EXT_XZBM] = true;
extension_table[EXT_XZBR] = true;
extension_table[EXT_XZBT] = true;
} else if (ext_str == "xzbp") {
extension_table[EXT_XZBP] = true;
} else if (ext_str == "xzbs") {
extension_table[EXT_XZBS] = true;
} else if (ext_str == "xzbe") {
extension_table[EXT_XZBE] = true;
} else if (ext_str == "xzbf") {
extension_table[EXT_XZBF] = true;
} else if (ext_str == "xzbc") {
extension_table[EXT_XZBC] = true;
} else if (ext_str == "xzbm") {
extension_table[EXT_XZBM] = true;
} else if (ext_str == "xzbr") {
extension_table[EXT_XZBR] = true;
} else if (ext_str == "xzbt") {
extension_table[EXT_XZBT] = true;
} else if (ext_str.size() == 1) {
bad_isa_string(str, "single 'X' is not a proper name");
} else if (ext_str != "xdummy") {
extension_t* x = find_extension(ext_str.substr(1).c_str())();
if (!extensions.insert(std::make_pair(x->name(), x)).second) {
fprintf(stderr, "extensions must have unique names (got two named \"%s\"!)\n", x->name());
abort();
}
}
} else {
bad_isa_string(str, ("unsupported extension: " + ext_str).c_str());
}
p = end;
}
if (*p) {
bad_isa_string(str, ("can't parse: " + std::string(p)).c_str());
}
std::string lowercase = strtolower(priv);
bool user = false, supervisor = false;
if (lowercase == "m")
;
else if (lowercase == "mu")
user = true;
else if (lowercase == "msu")
user = supervisor = true;
else
bad_priv_string(priv);
if (user) {
max_isa |= reg_t(user) << ('u' - 'a');
extension_table['U'] = true;
}
if (supervisor) {
max_isa |= reg_t(supervisor) << ('s' - 'a');
extension_table['S'] = true;
}
if (((max_isa >> ('h' - 'a')) & 1) && !supervisor)
bad_isa_string(str, "'H' extension requires S mode");
}
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