1#include <linux/compiler.h>
 2#include <linux/types.h>
 3
 4#include "tsc.h"
 5
 6u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc)
 7{
 8	u64 t, quot, rem;
 9
10	t = ns - tc->time_zero;
11	quot = t / tc->time_mult;
12	rem  = t % tc->time_mult;
13	return (quot << tc->time_shift) +
14	       (rem << tc->time_shift) / tc->time_mult;
15}
16
17u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc)
18{
19	u64 quot, rem;
20
21	quot = cyc >> tc->time_shift;
22	rem  = cyc & (((u64)1 << tc->time_shift) - 1);
23	return tc->time_zero + quot * tc->time_mult +
24	       ((rem * tc->time_mult) >> tc->time_shift);
25}
26
27u64 __weak rdtsc(void)
28{
29	return 0;
30}

 1#include <linux/compiler.h>
 2#include <linux/types.h>
 3
 4#include "tsc.h"
 5
 6u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc)
 7{
 8	u64 t, quot, rem;
 9
10	t = ns - tc->time_zero;
11	quot = t / tc->time_mult;
12	rem  = t % tc->time_mult;
13	return (quot << tc->time_shift) +
14	       (rem << tc->time_shift) / tc->time_mult;
15}
16
17u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc)
18{
19	u64 quot, rem;
20
21	quot = cyc >> tc->time_shift;
22	rem  = cyc & (((u64)1 << tc->time_shift) - 1);
23	return tc->time_zero + quot * tc->time_mult +
24	       ((rem * tc->time_mult) >> tc->time_shift);
25}
26
27u64 __weak rdtsc(void)
28{
29	return 0;
30}