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#include <cstdio>
#include <cstdint>
void run_threaded(uint8_t* code, int limit)
{
static void* opjump[] = {
&&add,
&&sub,
&&mul,
&&div,
&&print,
&&halt,
&&restart,
};
int counts[] = { 0, 0, 0, 0, 0, 0, 0 };
int ops = 0;
int pc = 0;
goto *opjump[code[pc]];
while (1)
{
add:
{
++counts[0];
if (++ops == limit) break;
goto *opjump[code[++pc]];
}
sub:
{
++counts[1];
if (++ops == limit) break;
goto *opjump[code[++pc]];
}
mul:
{
++counts[2];
if (++ops == limit) break;
goto *opjump[code[++pc]];
}
div:
{
++counts[3];
if (++ops == limit) break;
goto *opjump[code[++pc]];
}
print:
{
++counts[4];
if (++ops == limit) break;
goto *opjump[code[++pc]];
}
halt:
{
++counts[5];
if (++ops == limit) break;
break;
}
restart:
{
++counts[6];
if (++ops == limit) break;
pc = 0;
goto *opjump[code[pc]];
}
}
std::printf("add: %d\n", counts[0]);
std::printf("sub: %d\n", counts[1]);
std::printf("mul: %d\n", counts[2]);
std::printf("div: %d\n", counts[3]);
std::printf("print: %d\n", counts[4]);
std::printf("halt: %d\n", counts[5]);
std::printf("restart: %d\n", counts[6]);
}
int main()
{
uint8_t program[] = {
0, 0, 0, 0,
1, 2, 1, 2,
4, 3, 4, 3,
6,
};
run_threaded(program, 32 * 1000 * 1000);
return 0;
}
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