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137 lines
3.7 KiB
137 lines
3.7 KiB
/* *************************************************************************
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** INTEL Corporation Proprietary Information
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**
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** This listing is supplied under the terms of a license
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** agreement with INTEL Corporation and may not be copied
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** nor disclosed except in accordance with the terms of
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** that agreement.
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**
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** Copyright (c) 1995 Intel Corporation.
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** All Rights Reserved.
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**
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** *************************************************************************
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*/
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/*
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* ctiming.h
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*
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* DESCRIPTION:
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* Common timing functions.
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*
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* I extracted this code from meantime.h in HQV's decode directory.
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*/
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// $Header: S:\h26x\src\common\ctiming.h_v 1.2 26 Dec 1995 17:43:06 DBRUCKS $
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// $Log: S:\h26x\src\common\ctiming.h_v $
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;//
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;// Rev 1.2 26 Dec 1995 17:43:06 DBRUCKS
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;// changed bTimerIsOn to bTimerIsActive
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;//
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;// Rev 1.1 26 Dec 1995 12:40:54 DBRUCKS
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;// added higher level macros to simplify use
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;//
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;// Rev 1.0 20 Dec 1995 15:06:14 DBRUCKS
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;// Initial revision.
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#ifndef __CTIMING_H__
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#define __CTIMING_H__
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/* The following timing overhead numbers were generated by Tom Walsh
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* based on static variables for startlow, starthigh, and elapsed.
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*
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* When timing sections of code with low clock numbers be careful to
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* minimize the timing overhead. Store the sub totals to a stack variable
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* instead of to the instance via a pointer indirection and offset.
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*/
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#define P5TIMING_OVERHEAD 13
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#define P6TIMING_OVERHEAD 33
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/* Low Level Macros
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*/
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#define __RDTSC__ __asm { __asm __emit 0Fh __asm __emit 31h }
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#define STARTCLOCK(startlow,starthigh) { \
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__asm { \
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__asm __RDTSC__ \
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__asm mov startlow, eax \
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__asm mov starthigh, edx \
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} \
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}
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#define STOPCLOCKP5(startlow,starthigh,elapsed) { \
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__asm { \
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__asm __RDTSC__ \
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__asm sub eax, startlow \
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__asm sbb edx, starthigh \
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__asm sub eax, P5TIMING_OVERHEAD \
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__asm sbb edx, 0 \
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__asm mov elapsed,eax \
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} \
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}
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#define STOPCLOCKP6(startlow,starthigh,elapsed) { \
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__asm { \
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__asm __RDTSC__ \
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__asm sub eax, startlow \
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__asm sbb edx, starthigh \
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__asm sub eax, P6TIMING_OVERHEAD \
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__asm sbb edx, 0 \
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__asm mov elapsed,eax \
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} \
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}
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/* High Level Macros
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*
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* Call TIMER_START and TIMER_STOP in the main function that you wish to time.
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* TIMER_BEFORE and TIMER_AFTER should be used inside of that main function.
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* Fo example:
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*
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* TIMER_START
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* TIMER_BEFORE
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* TIMER_AFTER_P5
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* TIMER_BEFORE
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* TIMER_AFTER_P5
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* TIMER_STOP
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*
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* Variable Definitions
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* DWORD dwStartLow; // temporary set in TIMER_START
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* DWORD dwStartHigh; // temporary set in TIMER_START
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* DWORD dwElapsed; // temporary used in TIMER_AFTER_*
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* DWORD dwBefore; // temporary used in TIMER_BEFORE and TIMER_AFTER_*
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* DWORD dwResult; // result variable
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* int bTimerIsActive // boolean - true if timing this frame
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*
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* WARNING: TIMER_AFTER_P5 and TIMER_AFTER_P6 add to the result variable.
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*/
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#define TIMER_START(bTimerIsActive,dwStartLow,dwStartHigh) \
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{ \
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bTimerIsActive = 1; \
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STARTCLOCK(dwStartLow,dwStartHigh); \
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}
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#define TIMER_BEFORE(bTimerIsActive,dwStartLow,dwStartHigh,dwBefore) \
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{ \
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if (bTimerIsActive) \
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{ \
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STOPCLOCKP5(dwStartLow,dwStartHigh,dwBefore); \
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} \
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}
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#define TIMER_AFTER_P5(bTimerIsActive,dwStartLow,dwStartHigh,dwBefore,dwElapsed,dwResult) \
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{ \
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if (bTimerIsActive) \
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{ \
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STOPCLOCKP5(dwStartLow,dwStartHigh,dwElapsed); \
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dwResult += dwElapsed - dwBefore; \
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} \
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}
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#define TIMER_STOP(bTimerIsActive,dwStartLow,dwStartHigh,dwResult) \
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{ \
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if (bTimerIsActive) \
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{ \
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STOPCLOCKP5(dwStartLow,dwStartHigh,dwResult); \
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} \
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}
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#endif /* __CTIMING_H__ */
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