| // 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(unsigned 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(void) |
| { |
| unsigned int num_cycles, num_instr; |
| __asm__ volatile ("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"); |
| } |
| |
