Created
February 4, 2014 23:23
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| SUBROUTINE SEARCH1(IDATA,IDX,INPUT,IOUT,N) | |
| IMPLICIT NONE | |
| INTEGER IDATA,IDX,INPUT,IOUT,I,N,IL,IR,IC | |
| DIMENSION IDATA(N),IDX(N),INPUT(N),IOUT(N) | |
| DO 20 I=1,N | |
| IL=1 | |
| IR=N | |
| 30 IC=(IL+IR)/2 | |
| IF(IDATA(IDX(IC)).EQ.INPUT(I))THEN | |
| IOUT(I)=IC | |
| ELSE | |
| IF(IDATA(IDX(IC)).GT.INPUT(I))THEN | |
| IR=IC-1 | |
| ELSE | |
| IL=IC+1 | |
| END IF | |
| GO TO 30 | |
| END IF | |
| 20 CONTINUE | |
| C | |
| RETURN | |
| END | |
| C | |
| SUBROUTINE SEARCH2(IDATA,IDX,INPUT,IOUT,N) | |
| IMPLICIT NONE | |
| INTEGER IDATA,IDX,INPUT,IOUT,ITMP,I,N,IL,IR,IC | |
| DIMENSION IDATA(N),IDX(N),INPUT(N),ITMP(N),IOUT(N) | |
| DO 10 I=1,N | |
| ITMP(I)=IDATA(IDX(I)) | |
| 10 CONTINUE | |
| DO 20 I=1,N | |
| IL=1 | |
| IR=N | |
| 30 IC=(IL+IR)/2 | |
| IF(ITMP(IC).EQ.INPUT(I))THEN | |
| IOUT(I)=IC | |
| ELSE | |
| IF(ITMP(IC).GT.INPUT(I))THEN | |
| IR=IC-1 | |
| ELSE | |
| IL=IC+1 | |
| END IF | |
| GO TO 30 | |
| END IF | |
| 20 CONTINUE | |
| C | |
| RETURN | |
| END | |
| C | |
| IMPLICIT NONE | |
| INTEGER IDATA,IDX,INPUT,IOUT1,IOUT2,I,J,NN,N | |
| INTEGER ISTART,IEND,IRATE,IMAX,NDIFF | |
| REAL*8 TIME1,TIME2 | |
| PARAMETER(NN=24,N=2**NN) | |
| DIMENSION IDATA(N),IDX(N),INPUT(N),IOUT1(N),IOUT2(N) | |
| C | |
| DO 10 I=1,N | |
| IDATA(I)=1 | |
| DO 20 J=1,NN | |
| IF(MOD((I-1)/2**(J-1),2).EQ.1)THEN | |
| IDATA(I)=IDATA(I)+2**(NN-J) | |
| END IF | |
| 20 CONTINUE | |
| IDX(I)=IDATA(I) | |
| INPUT(I)=IDATA(I) | |
| 10 CONTINUE | |
| CALL SEARCH1(IDATA,IDX,INPUT,IOUT1,N) | |
| CALL SYSTEM_CLOCK(ISTART,IRATE,IMAX) | |
| CALL SEARCH1(IDATA,IDX,INPUT,IOUT1,N) | |
| CALL SYSTEM_CLOCK(IEND,IRATE,IMAX) | |
| TIME1=DBLE(IEND-ISTART)/DBLE(IRATE) | |
| CALL SEARCH2(IDATA,IDX,INPUT,IOUT2,N) | |
| CALL SYSTEM_CLOCK(ISTART,IRATE,IMAX) | |
| CALL SEARCH2(IDATA,IDX,INPUT,IOUT2,N) | |
| CALL SYSTEM_CLOCK(IEND,IRATE,IMAX) | |
| TIME2=DBLE(IEND-ISTART)/DBLE(IRATE) | |
| NDIFF=0 | |
| DO 30 I=1,N | |
| IF(IOUT1(I).NE.IOUT2(I))THEN | |
| NDIFF=NDIFF+1 | |
| END IF | |
| 30 CONTINUE | |
| WRITE(*,*)TIME1,TIME2,NDIFF | |
| END |
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