-rw-r--r-- 422 libcpucycles-20230105/cpucycles/amd64-tscasm.c raw
// version 20230105 // public domain // djb // adapted from supercop/cpucycles/amd64tscfreq.c #include "cpucycles_internal.h" long long ticks(void) { unsigned long long result; asm volatile(".byte 15;.byte 49;shlq $32,%%rdx;orq %%rdx,%%rax" : "=a"(result) :: "%rdx"); return result; } long long ticks_setup(void) { if (!cpucycles_works(ticks)) return cpucycles_SKIP; return cpucycles_MAYBECYCLECOUNTER; }