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/*************************************************
* Hardware Timer Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/tm_hard.h>
#include <botan/config.h>
namespace Botan {
/*************************************************
* Get the timestamp *
*************************************************/
u64bit Hardware_Timer::clock() const
{
u64bit rtc = 0;
#if !defined(__GNUC__)
#error "This module uses GCC-style inline asm"
#endif
#if defined(BOTAN_TARGET_ARCH_IS_IA32) || defined(BOTAN_TARGET_ARCH_IS_AMD64)
u32bit rtc_low = 0, rtc_high = 0;
asm volatile("rdtsc" : "=d" (rtc_high), "=a" (rtc_low));
rtc = ((u64bit)rtc_high << 32) | rtc_low;
#elif defined(BOTAN_TARGET_ARCH_IS_PPC) || defined(BOTAN_TARGET_ARCH_IS_PPC64)
u32bit rtc_low = 0, rtc_high = 0;
asm volatile("mftbu %0; mftb %1" : "=r" (rtc_high), "=r" (rtc_low));
rtc = ((u64bit)rtc_high << 32) | rtc_low;
#elif defined(BOTAN_TARGET_ARCH_IS_ALPHA)
asm volatile("rpcc %0" : "=r" (rtc));
#elif defined(BOTAN_TARGET_ARCH_IS_SPARC64)
asm volatile("rd %%tick, %0" : "=r" (rtc));
#else
#error "Unsure how to access hardware timer on this system"
#endif
return rtc;
}
}
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