Attachment 50597 Details for Bug 100089 – denbench_mp2decoddata2.cpp

denbench_mp2decoddata2.cpp

test.cpp (text/x-csrc), 2.08 KB, created by Hongtao.liu on 2021-04-15 06:35:57 UTC

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Creator: Hongtao.liu

Created: 2021-04-15 06:35:57 UTC

Size: 2.08 KB

patch

obsolete

>#include<stdint.h>
>#include <chrono>
>#include <iostream>
>#include <cstring>
>#include <stdlib.h>
>#include <stdint.h>
>typedef signed short e_s16;
>typedef signed long e_s32;
>
>std::chrono::high_resolution_clock::time_point start,end;
>std::chrono::duration<double> elapsed;
>std::chrono::high_resolution_clock timer;
>bool pause = false;
>
>
>void pause_timer()
>{
>  end = timer.now();
>  elapsed += (end-start);
>  pause = true;
>}  
>
>void unpause_timer() 
>{
>  pause = false;
>  start = timer.now();
>}
>
>void
>__attribute__ ((noipa))
>foo (e_s16* a)
>{
>  free (a);
>}
>
>
>static inline void idctrow(e_s16 *blk)
>{
>   e_s32 x0, x1, x2, x3, x4, x5, x6, x7, x8;
>
>
>   if (!((x1 = blk[4]<<11) | (x2 = blk[6]) | (x3 = blk[2]) |
>      (x4 = blk[1]) | (x5 = blk[7]) | (x6 = blk[5]) | (x7 = blk[3])))
>   {
>      blk[0]=blk[1]=blk[2]=blk[3]=blk[4]=blk[5]=blk[6]=blk[7]=(e_s16)blk[0]<<3;
>      return;
>   }
>
>   x0 = (blk[0]<<11) + 128;
>
>
>   x8 = 565*(x4+x5);
>   x4 = x8 + (2841 -565)*x4;
>   x5 = x8 - (2841 +565)*x5;
>   x8 = 2408*(x6+x7);
>   x6 = x8 - (2408 -1609)*x6;
>   x7 = x8 - (2408 +1609)*x7;
>
>
>   x8 = x0 + x1;
>   x0 -= x1;
>   x1 = 1108*(x3+x2);
>   x2 = x1 - (2676 +1108)*x2;
>   x3 = x1 + (2676 -1108)*x3;
>   x1 = x4 + x6;
>   x4 -= x6;
>   x6 = x5 + x7;
>   x5 -= x7;
>   x7 = x8 + x3;
>   x8 -= x3;
>   x3 = x0 + x2;
>   x0 -= x2;
>   x2 = (181*(x4+x5)+128)>>8;
>   x4 = (181*(x4-x5)+128)>>8;
>
>   blk[0] = (e_s16)((x7+x1)>>8);
>   blk[1] = (e_s16)((x3+x2)>>8);
>   blk[2] = (e_s16)((x0+x4)>>8);
>   blk[3] = (e_s16)((x8+x6)>>8);
>   blk[4] = (e_s16)((x8-x6)>>8);
>   blk[5] = (e_s16)((x0-x4)>>8);
>   blk[6] = (e_s16)((x3-x2)>>8);
>   blk[7] = (e_s16)((x7-x1)>>8);
>
>}
>
>int
>__attribute__ ((noipa))
>Fast_IDCT(e_s16 *block)
>{
>   e_s32 i;
>
>   for (i=0; i<8; i++)
>      idctrow(block+8*i);
>
>   return 1;
>}
>
>int main ()
>{
>  int i = 0;
>  while (i++ != 30000000)
>    {
>      e_s16* p = new e_s16[64];
>      for (int j = 0;j != 64; j++)
>	p[j] = j*j - 3*j + 2;
>      unpause_timer ();
>      Fast_IDCT (p);
>      pause_timer ();
>      foo (p);
>    }
>
>  std::cout << "elapsed time: "<<  elapsed.count() <<" seconds for Fast_IDCT with 30000000 iterations"<<std::endl;
>  return 1;
>}
>

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