參數(shù)資料
型號： BENCHMARKING
英文描述： Benchmarking the Am186EM: Using the Dhrystone V2.1 As An Example Application Note? 1.66MB (PDF)
中文描述： 基準(zhǔn)Am186EM：作為示例應(yīng)用注意Dhrystone的V2.1版本？ 1.66MB（PDF格式）
文件頁數(shù)： 37/88頁
文件大小： 1701K
代理商： BENCHMARKING
37
//test loop time
// could use a #pragma here to turn off the optimizer
amd = 0; // any variable will do here (unused one please)
timer_start(); // init the timers and set to 0
// now do as many loops as the timed program will run. If only 1 pass skip this
// section of code.
for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index){
amd = amd +1; // keeps optimizer at bay, it will try to take out code
}
timer_stop(); // stop the timer
amd = amd+2; // keeps optimizer at bay
read_time(&Ttest_time); //get counters into Ttest_time struct
loop_time = elapsed_time(40.0,&Ttest_time); // produce a floating point
// number of seconds of execution
timer_init(); //reset the timer back to 0
//now start the program
cr2_on(); // signal start of program turn on the LED
timer_start(); //start timer again
#endif // optional, use if you used #ifdef
/***************/
At the end of the program being timed:
/**************/
/* Stop timer */
/**************/
#ifdef AM186EM
timer_stop(); //stop timer
cr3_on(); // signal program stop
read_time(&Ttest_time); // read the contents of the timers into a structure
total_time = elapsed_time(40.0,&Ttest_time); // calculate number of secs.
#endif
/**************/
/****************/
/* Calculations */
/****************/
#ifdef AM186EM
***************** YOUR PROGRAM *********************
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