mirror of https://github.com/YosysHQ/picorv32.git
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
// This is free and unencumbered software released into the public domain.
|
|
//
|
|
// Anyone is free to copy, modify, publish, use, compile, sell, or
|
|
// distribute this software, either in source code form or as a compiled
|
|
// binary, for any purpose, commercial or non-commercial, and by any
|
|
// means.
|
|
|
|
#include "firmware.h"
|
|
|
|
static void stats_print_dec(int val, int digits, bool zero_pad)
|
|
{
|
|
char buffer[32];
|
|
char *p = buffer;
|
|
while (val || digits > 0) {
|
|
if (val)
|
|
*(p++) = '0' + val % 10;
|
|
else
|
|
*(p++) = zero_pad ? '0' : ' ';
|
|
val = val / 10;
|
|
digits--;
|
|
}
|
|
while (p != buffer) {
|
|
if (p[-1] == ' ' && p[-2] == ' ') p[-1] = '.';
|
|
print_chr(*(--p));
|
|
}
|
|
}
|
|
|
|
void stats()
|
|
{
|
|
int num_cycles, num_instr;
|
|
asm("rdcycle %0; rdinstret %1;" : "=r"(num_cycles), "=r"(num_instr));
|
|
print_str("Cycle counter ........");
|
|
stats_print_dec(num_cycles, 8, false);
|
|
print_str("\nInstruction counter ..");
|
|
stats_print_dec(num_instr, 8, false);
|
|
print_str("\nCPI: ");
|
|
stats_print_dec((num_cycles / num_instr), 0, false);
|
|
print_str(".");
|
|
stats_print_dec(((100 * num_cycles) / num_instr) % 100, 2, true);
|
|
print_str("\n");
|
|
}
|
|
|