cyccount.c

vc写的SSE2优化离散余弦变换

#define C1
#ifdef C1
//cycCount.c
// managament of time-stamp counter (Pentium)
// $Revision:   1.0  $ 
//***************************************************************************/
//*
//*                  Copyright (c) 1998-99 Intel Corporation.
//*                         All rights reserved.
//*
//*
//***************************************************************************/

#define CALL_CPUID _asm _emit 0x60 __asm _emit 0x0F __asm _emit 0xA2 _asm _emit 0x61
#define RTDSC __asm _emit 0x0F __asm _emit 0x31

long EventTime[32] =						//accummulator for time spent during event
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
long EventStart[32] =					//register start of current measurment for event 
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};	//    while measurment is active
long	IterCount[16] =						//iterartion counter for event
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 

void start_time_event(long, long);
void end_time_event(long);
void reset_time_event_info(long);
long get_time_event_info(long);

/*
struct num_functions {
    char name[32];
    long total;
    long avg;
    long cnt;
} numf[10] = {
    "rgb_ycc_convert", 0, 0, 0,
    "MRGB2YCbCr", 0, 0, 0,
    "forward_DCT", 0, 0, 0,
    "h2v1_downsample", 0, 0, 0,
    "h2v2_downsample", 0, 0, 0,
    "h2v2_merged_upsample", 0, 0, 0,
    "h2v1_fancy_upsample", 0, 0, 0,
    "h2v2_fancy_upsample", 0, 0, 0,
    "jpeg_idct_4x4", 0, 0, 0,
    "jpeg_idct_4x2", 0, 0, 0 };
*/


//*.**PROCEDURE ABSTRACT*****************************************************
//*.
//*.  FUNCTION:   VOID _start_time_event( iCounter:DWORD, bIterOnceMore: DWORD )
//*.  ABSTRACT:   registers start of timing event no. iCounter. if bIterOnceMore is 
//*.				 set, the iteration counter for this event is increased
//*.
//*.*************************************************************************

void start_time_event(long iCounter, long bIterOnceMore)
{
	long hi_time, lo_time;

	__asm {
			CALL_CPUID
		;	RDTSC						;//get time-stamp information in EDX:EAX
			_emit 0x0F
			_emit 0x31
			MOV		hi_time, edx
			MOV		lo_time, eax
	}

	EventStart[2*iCounter] = lo_time;			//store lower 32-bit
	EventStart[2*iCounter+1] = hi_time;		//store upper 32-bit

	if (bIterOnceMore)
		IterCount[iCounter]++;
}


//*.**PROCEDURE ABSTRACT*****************************************************
//*.
//*.  FUNCTION:   VOID _end_time_event( iCounter:DWORD)
//*.  ABSTRACT:   registers end of timing event no. iCounter. 
//*.
//*.
//*.*************************************************************************

void end_time_event(long iCounter)
{
	long hi_time, lo_time,  // EDX, EAX
		 lower32, upper32;  // EBX, ECX

	__asm {
			CALL_CPUID
		;	RDTSC						;//get time-stamp information in EDX:EAX
			_emit 0x0F
			_emit 0x31
			MOV		lo_time, EAX		;//store lower 32-bit
			MOV		hi_time, EDX
	}

	lower32 = EventStart[2*iCounter];
	upper32 = EventStart[2*iCounter+1];

	lo_time -= lower32;  // SUB
	hi_time = (lo_time < 0) ? hi_time - upper32 + 1 : hi_time - upper32;  // SBB

	if (lo_time < 0)
		lo_time *= -1;

	lower32 = EventTime[2*iCounter];
	upper32 = EventTime[2*iCounter+1];

	lo_time += lower32;
	hi_time += upper32;

	EventTime[2*iCounter] = lo_time;
	EventTime[2*iCounter+1] = hi_time;
}


//*.**PROCEDURE ABSTRACT*****************************************************
//*.
//*.  FUNCTION:   DWORD _get_time_event_info( iCounter:DWORD)
//*.  ABSTRACT:   query for timing event no. iCounter. 
//*.	 RETURNS:
//*.			Number of clock cycles spent in event no. iCounter, divided by
//*.			the iteration counter for that event.
//*.
//*.  NOTES: 
//*.			Only lower 32 bits of result are returned
//*.
//*.*************************************************************************

long get_time_event_info(long iCounter)
{
	long hi_time, lo_time,  // EDX, EAX
		 lower32;  // EBX, ECX
//		 lower32, upper32;  // EBX, ECX

	lo_time = EventTime[2*iCounter];
	hi_time = EventTime[2*iCounter+1];

	lower32 = IterCount[iCounter];

	if (lower32)
		lo_time /= lower32;

	return lo_time;
}


//*.**PROCEDURE ABSTRACT*****************************************************
//*.
//*.  FUNCTION:   VOID _reset_time_event_info( iCounter:DWORD)
//*.  ABSTRACT:   forget all information about timing event no. iCounter. 
//*.
//*.
//*.*************************************************************************

void reset_time_event_info(long iCounter)
{
	long lo_time = 0L;  // EAX

	EventStart[2*iCounter] = lo_time;
	EventStart[2*iCounter+1] = lo_time;
	EventTime[2*iCounter] = lo_time;
	EventTime[2*iCounter+1] = lo_time;
	IterCount[iCounter] = lo_time;
}
#endif