2008-08-17 18:01:49 +00:00
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel
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2015-10-04 11:54:25 +00:00
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* FILE: ntoskrnl/rtl/i386/stack.S
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2008-08-17 18:01:49 +00:00
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* PURPOSE: Stack Support for RTL
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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2010-11-27 22:12:15 +00:00
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#include <asm.inc>
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#include <ks386.inc>
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2008-08-17 18:01:49 +00:00
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2015-09-01 19:51:52 +00:00
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EXTERN _KePrefetchNTAGranularity:DWORD
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2008-08-17 18:01:49 +00:00
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/* FUNCTIONS *****************************************************************/
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2010-11-27 22:12:15 +00:00
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.code
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2008-08-17 18:01:49 +00:00
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2015-09-01 19:51:52 +00:00
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PUBLIC @RtlPrefetchMemoryNonTemporal@8
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@RtlPrefetchMemoryNonTemporal@8:
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/*
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* Kernel will overwrite this to 'nop' during init
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* if prefetchnta is available. Slight optimization
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* as compared to checking KeI386XMMIPresent for every call.
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*/
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ret
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/* Get granularity */
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mov eax, [_KePrefetchNTAGranularity]
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/* Prefetch this line */
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FetchLine:
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prefetchnta byte ptr [ecx]
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/* Update address and count */
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add ecx, eax
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sub edx, eax
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/* Keep looping for the next line, or return if done */
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ja FetchLine
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ret
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2010-11-27 22:12:15 +00:00
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END
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