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Optimize get_system_time using 128 bit math

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This commit is contained in:
Elad 2024-10-24 04:39:02 +03:00
parent 8d9911e383
commit 3378b03c1f
1 changed files with 8 additions and 0 deletions
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8
rpcs3/Emu/Cell/lv2/sys_time.cpp
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@ -155,7 +155,11 @@ u64 get_timebased_time()
const u64 time = count.QuadPart;
const u64 freq = s_time_aux_info.perf_freq;
#if is_u128_emulated
const u64 result = static_cast<u64>(u128_from_mul(time * g_cfg.core.clocks_scale, g_timebase_freq) / freq / 100u);
#else
const u64 result = (time / freq * g_timebase_freq + time % freq * g_timebase_freq / freq) * g_cfg.core.clocks_scale / 100u;
#endif
#else
struct timespec ts;
ensure(::clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
@ -199,7 +203,11 @@ u64 get_system_time()
const u64 time = count.QuadPart;
const u64 freq = s_time_aux_info.perf_freq;
#if is_u128_emulated
const u64 result = static_cast<u64>(u128_from_mul(time, 1000000ull) / freq);
#else
const u64 result = time / freq * 1000000ull + (time % freq) * 1000000ull / freq;
#endif
#else
struct timespec ts;
ensure(::clock_gettime(CLOCK_MONOTONIC, &ts) == 0);