blob: 681bd0c8a27e690580254012ac84d95be955a590 (
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
|
// Copyright (c) 2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
/** Functions for measurement of CPU cycles */
#ifndef H_PERF
#define H_PERF
#include <stdint.h>
#if defined(__i386__)
static inline uint64_t perf_cpucycles(void)
{
uint64_t x;
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#elif defined(__x86_64__)
static inline uint64_t perf_cpucycles(void)
{
uint32_t hi, lo;
__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
return ((uint64_t)lo)|(((uint64_t)hi)<<32);
}
#else
uint64_t perf_cpucycles(void);
#endif
void perf_init(void);
void perf_fini(void);
#endif // H_PERF
|
