-rw-r--r-- 382 libcpucycles-20230115/cpucycles/s390x-stckf.c raw
// version 20230106 // public domain // djb // adapted from sparc64-rdtick.c #include "cpucycles_internal.h" long long ticks(void) { long long result; asm volatile("stckf 0(%0)" :: "a"(&result) : "memory","cc"); return result; } long long ticks_setup(void) { if (!cpucycles_works(ticks)) return cpucycles_SKIP; return 4096000000; // manual says 2^12 per microsecond }