From 2e8029a45b3deeaf31156b093541e0961520c29d Mon Sep 17 00:00:00 2001
From: elad335 <18193363+elad335@users.noreply.github.com>
Date: Thu, 24 Oct 2024 11:32:01 +0300
Subject: [PATCH] get_system_time(): Add fast TSC-based path

---
 rpcs3/Emu/Cell/lv2/sys_time.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/rpcs3/Emu/Cell/lv2/sys_time.cpp b/rpcs3/Emu/Cell/lv2/sys_time.cpp
index 394c3ab4a2..aa5436d998 100644
--- a/rpcs3/Emu/Cell/lv2/sys_time.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_time.cpp
@@ -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