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| author | Nat Goodspeed <nat@lindenlab.com> | 2017-11-29 14:47:09 -0500 |
|---|---|---|
| committer | Nat Goodspeed <nat@lindenlab.com> | 2017-11-29 14:47:09 -0500 |
| commit | e3a2c5e3217ae74a0277f2e6d4e1e708fe398a1c (patch) | |
| tree | f912ed486a465f5cc0aee5c73c9cb70c195e8c4d /indra/llcommon/llfasttimer.h | |
| parent | 1693ccba58eef676df1f91e50627545ac35bb819 (diff) | |
| parent | bf98e092e53ed228b3cb50fe816058c5a7817329 (diff) | |
DRTVWR-418: Merge from latest viewer-release
Diffstat (limited to 'indra/llcommon/llfasttimer.h')
| -rw-r--r-- | indra/llcommon/llfasttimer.h | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/indra/llcommon/llfasttimer.h b/indra/llcommon/llfasttimer.h index f56e5596f5..2024d707da 100644 --- a/indra/llcommon/llfasttimer.h +++ b/indra/llcommon/llfasttimer.h @@ -90,33 +90,15 @@ public: #if LL_FASTTIMER_USE_RDTSC static U32 getCPUClockCount32() { - U32 ret_val; - __asm - { - _emit 0x0f - _emit 0x31 - shr eax,8 - shl edx,24 - or eax, edx - mov dword ptr [ret_val], eax - } - return ret_val; + unsigned __int64 val = __rdtsc(); + val = val >> 8; + return static_cast<U32>(val); } // return full timer value, *not* shifted by 8 bits static U64 getCPUClockCount64() { - U64 ret_val; - __asm - { - _emit 0x0f - _emit 0x31 - mov eax,eax - mov edx,edx - mov dword ptr [ret_val+4], edx - mov dword ptr [ret_val], eax - } - return ret_val; + return static_cast<U64>( __rdtsc() ); } #else @@ -173,16 +155,16 @@ public: // Mac+Linux+Solaris FAST x86 implementation of CPU clock static U32 getCPUClockCount32() { - U64 x; - __asm__ volatile (".byte 0x0f, 0x31": "=A"(x)); - return (U32)(x >> 8); + U32 low(0),high(0); + __asm__ volatile (".byte 0x0f, 0x31": "=a"(low), "=d"(high) ); + return (low>>8) | (high<<24); } static U64 getCPUClockCount64() { - U64 x; - __asm__ volatile (".byte 0x0f, 0x31": "=A"(x)); - return x; + U32 low(0),high(0); + __asm__ volatile (".byte 0x0f, 0x31": "=a"(low), "=d"(high) ); + return (U64)low | ( ((U64)high) << 32); } #endif |