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