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// See LICENSE for license details.
#ifndef _RISCV_DISASM_H
#define _RISCV_DISASM_H
#include "decode.h"
#include <string>
#include <sstream>
#include <vector>
extern const char* xpr_name[NXPR];
extern const char* fpr_name[NFPR];
extern const char* vr_name[NVPR];
extern const char* csr_name(int which);
class arg_t
{
public:
virtual std::string to_string(insn_t val) const = 0;
virtual ~arg_t() {}
};
// Indicates that the next arg (only) is optional.
// If the result of converting the next arg to a string is ""
// then it will not be printed.
struct : public arg_t {
std::string to_string(insn_t insn) const { return ""; }
} opt;
class disasm_insn_t
{
public:
NOINLINE disasm_insn_t(const char* name, uint32_t match, uint32_t mask,
const std::vector<const arg_t*>& args)
: match(match), mask(mask), args(args), name(strdup(name)) {}
~disasm_insn_t() { free(const_cast<char *>(name)); }
bool operator == (insn_t insn) const
{
return (insn.bits() & mask) == match;
}
const char* get_name() const
{
return name;
}
std::string to_string(insn_t insn) const
{
std::stringstream s;
int len;
for (len = 0; name[len]; len++)
s << (name[len] == '_' ? '.' : name[len]);
if (args.size())
{
bool next_arg_optional = false;
s << std::string(std::max(1, 8 - len), ' ');
for (size_t i = 0; i < args.size(); i++) {
if (args[i] == &opt) {
next_arg_optional = true;
continue;
}
std::string argString = args[i]->to_string(insn);
if (next_arg_optional) {
next_arg_optional = false;
if (argString.empty()) continue;
}
if (i != 0) s << ", ";
s << argString;
}
}
return s.str();
}
uint32_t get_match() const { return match; }
uint32_t get_mask() const { return mask; }
private:
uint32_t match;
uint32_t mask;
std::vector<const arg_t*> args;
const char* name;
};
class disassembler_t
{
public:
disassembler_t(int xlen);
~disassembler_t();
std::string disassemble(insn_t insn) const;
const disasm_insn_t* lookup(insn_t insn) const;
void add_insn(disasm_insn_t* insn);
private:
static const int HASH_SIZE = 256;
std::vector<const disasm_insn_t*> chain[HASH_SIZE+1];
};
#endif
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