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get_system_time(): Add fast TSC-based path

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elad335 2024-10-24 11:32:01 +03:00 committed by Elad
parent a9a454faf7
commit 2e8029a45b
1 changed files with 25 additions and 0 deletions
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25
rpcs3/Emu/Cell/lv2/sys_time.cpp
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@ -7,6 +7,7 @@
#include "Emu/Cell/timers.hpp"
#include "util/asm.hpp"
#include "util/sysinfo.hpp"
static u64 timebase_offset;
static u64 systemtime_offset;
@ -146,6 +147,18 @@ u64 convert_to_timebased_time(u64 time)
u64 get_timebased_time()
{
if (u64 freq = utils::get_tsc_freq())
{
const u64 tsc = utils::get_tsc();
#if is_u128_emulated
const u64 result = static_cast<u64>(u128_from_mul(tsc, g_timebase_freq) / freq) * g_cfg.core.clocks_scale / 100u;
#else
const u64 result = (tsc / freq * g_timebase_freq + tsc % freq * g_timebase_freq / freq) * g_cfg.core.clocks_scale / 100u;
#endif
return result - timebase_offset;
}
while (true)
{
#ifdef _WIN32
@ -194,6 +207,18 @@ void initialize_timebased_time(u64 timebased_init, bool reset)
// Returns some relative time in microseconds, don't change this fact
u64 get_system_time()
{
if (u64 freq = utils::get_tsc_freq())
{
const u64 tsc = utils::get_tsc();
#if is_u128_emulated
const u64 result = static_cast<u64>(u128_from_mul(tsc, 1000000ull) / freq) * g_cfg.core.clocks_scale / 100u;
#else
const u64 result = (tsc / freq * 1000000ull + tsc % freq * 1000000ull / freq) * g_cfg.core.clocks_scale / 100u;
#endif
return result;
}
while (true)
{
#ifdef _WIN32