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// See LICENSE for license details.
// This little program finds occurrences of strings like
// DASM(ffabc013)
// in its input, then replaces them with the disassembly
// enclosed hexadecimal number, interpreted as a RISC-V
// instruction.
#include "disasm.h"
#include "extension.h"
#include <iostream>
#include <string>
#include <cstdint>
#include <fesvr/option_parser.h>
using namespace std;
int main(int argc, char** argv)
{
string s;
const char* isa = DEFAULT_ISA;
std::function<extension_t*()> extension;
option_parser_t parser;
#ifdef HAVE_DLOPEN
parser.option(0, "extension", 1, [&](const char* s){extension = find_extension(s);});
#endif
parser.option(0, "isa", 1, [&](const char* s){isa = s;});
parser.parse(argv);
std::string lowercase;
for (const char *p = isa; *p; p++)
lowercase += std::tolower(*p);
int xlen;
if (lowercase.compare(0, 4, "rv32") == 0) {
xlen = 32;
} else if (lowercase.compare(0, 4, "rv64") == 0) {
xlen = 64;
} else {
fprintf(stderr, "bad ISA string: %s\n", isa);
return 1;
}
disassembler_t* disassembler = new disassembler_t(xlen);
if (extension) {
for (auto disasm_insn : extension()->get_disasms()) {
disassembler->add_insn(disasm_insn);
}
}
while (getline(cin, s))
{
for (size_t pos = 0; (pos = s.find("DASM(", pos)) != string::npos; )
{
size_t start = pos;
pos += strlen("DASM(");
if (s[pos] == '0' && (s[pos+1] == 'x' || s[pos+1] == 'X'))
pos += 2;
if (!isxdigit(s[pos]))
continue;
char* endp;
int64_t bits = strtoull(&s[pos], &endp, 16);
if (*endp != ')')
continue;
size_t nbits = 4 * (endp - &s[pos]);
if (nbits < 64)
bits = bits << (64 - nbits) >> (64 - nbits);
string dis = disassembler->disassemble(bits);
s = s.substr(0, start) + dis + s.substr(endp - &s[0] + 1);
pos = start + dis.length();
}
cout << s << '\n';
}
return 0;
}
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