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#include <botan/botan.h>
using namespace Botan;
#include "common.h"
#include <time.h>
/*
Using clock() or similiar is bad news when using a hardware-based Engine,
as all the stuff is offloaded and we use zero CPU time, which makes the
benchmarks and such take forever.
*/
#define USE_CLOCK 0
#define USE_TIMES 0
#define USE_POSIX_GETTIME 0
#define USE_RDTSC 1
/* If using USE_RDTSC, set to your CPU's Mhz */
#define CPU_MHZ 2400
#if USE_CLOCK
u64bit get_clock() { return clock(); }
u64bit get_ticks() { return CLOCKS_PER_SEC; }
#elif USE_TIMES
#include <sys/times.h>
#include <unistd.h>
u64bit get_clock() { return times(0); }
u64bit get_ticks() { return sysconf(_SC_CLK_TCK); }
#elif USE_POSIX_GETTIME
u64bit get_clock()
{
struct timespec tv;
clock_gettime(CLOCK_REALTIME, &tv);
return (tv.tv_sec * 1000000000 + tv.tv_nsec) / 1000;
}
u64bit get_ticks() { return 1000000; }
#elif USE_RDTSC
u64bit get_clock()
{
u64bit rtc = 0;
u32bit rtc_low = 0, rtc_high = 0;
asm volatile("rdtsc" : "=d" (rtc_high), "=a" (rtc_low));
rtc = ((u64bit)rtc_high << 32) | rtc_low;
return rtc / 1000;
}
u64bit get_ticks() { return CPU_MHZ * 1000; }
#else
#error "Must choose a timing method!"
#endif
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