From 93a6ec30d4140e1f31359530e0f154595f4ba6b3 Mon Sep 17 00:00:00 2001
From: Rye Mutt <rye@alchemyviewer.org>
Date: Wed, 21 Jul 2021 21:24:09 -0400
Subject: [PATCH] Use rdtsc intrinsic on macos and linux
---
indra/llcommon/llfasttimer.h | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/indra/llcommon/llfasttimer.h b/indra/llcommon/llfasttimer.h
index 5aad4bcb643..5a76a2e5bb7 100644
--- a/indra/llcommon/llfasttimer.h
+++ b/indra/llcommon/llfasttimer.h
@@ -141,16 +141,13 @@ class BlockTimer
// Mac+Linux FAST x86 implementation of CPU clock
static U32 getCPUClockCount32()
{
- U32 low(0),high(0);
- __asm__ volatile (".byte 0x0f, 0x31": "=a"(low), "=d"(high) );
- return (low>>8) | (high<<24);
+ U64 time_stamp = __rdtsc() >> 8U;
+ return static_cast<U32>(time_stamp);
}
static U64 getCPUClockCount64()
{
- U32 low(0),high(0);
- __asm__ volatile (".byte 0x0f, 0x31": "=a"(low), "=d"(high) );
- return (U64)low | ( ((U64)high) << 32);
+ return static_cast<U64>(__rdtsc());
}
#endif
--
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