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27 lines
548 B
C
27 lines
548 B
C
/*
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Only works in x86_64.
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- https://en.wikipedia.org/wiki/Time_Stamp_Counter
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- https://stackoverflow.com/questions/9887839/clock-cycle-count-wth-gcc/9887979
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#if defined(__i386__) || defined(__x86_64__)
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#include <x86intrin.h>
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#endif
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int main(void) {
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uintmax_t val;
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#if defined(__i386__) || defined(__x86_64__)
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/* https://stackoverflow.com/questions/9887839/clock-cycle-count-wth-gcc/9887979 */
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val = __rdtsc();
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#else
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val = 0;
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#endif
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printf("%jx\n", val);
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return EXIT_SUCCESS;
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}
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