blob: 10855daa8d2464529341d96d83fbc1847c523d29 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
/*************************************************
* Hardware Timer Source File *
* (C) 1999-2008 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(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 = (static_cast<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 = (static_cast<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;
}
}
|
