Several decoder optimizations, including implementation of FFTW wisdom.

Notes:
1. Equivalents of wisdom1.bat will be needed for *nix and OS X.  (The
   version now added to the source .../lib directory is an example only.)
2. Installers should offer to run the wisdom1[.bat] script at installation
   time.
3. wisdom1[.bat] and fftwf-wisdom[.exe] must be installed in .../bin directory 



git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4607 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/filbig.f90

@@ -7,7 +7,8 @@ subroutine filbig(dd,npts,f0,newdat,c4a,n4,sq0)
   parameter (NFFT1=672000,NFFT2=77175)
   parameter (NZ2=1000)
   real*4  dd(npts)                           !Input data
-  complex ca(NFFT1)                          !FFT of input
+  real*4 rca(NFFT1)
+  complex ca(NFFT1/2+1)                      !FFT of input
   complex c4a(NFFT2)                         !Output data
   real*4 s(NZ2)
   real*8 df
@@ -17,8 +18,8 @@ subroutine filbig(dd,npts,f0,newdat,c4a,n4,sq0)
   integer*8 plan1,plan2,plan3
   logical first
   include 'fftw3.f90'
-  equivalence (rfilt,cfilt)
-  data first/.true./,npatience/0/
+  equivalence (rfilt,cfilt),(rca,ca)
+  data first/.true./,npatience/1/
   data halfpulse/114.97547150,36.57879257,-20.93789101,              &
        5.89886379,1.59355187,-2.49138308,0.60910773,-0.04248129/
   common/refspec/dfref,ref(NSZ)
@@ -34,7 +35,7 @@ subroutine filbig(dd,npts,f0,newdat,c4a,n4,sq0)
      if(npatience.eq.4) nflags=FFTW_EXHAUSTIVE
 ! Plan the FFTs just once
      call timer('FFTplans ',0)
-     call sfftw_plan_dft_1d(plan1,nfft1,ca,ca,FFTW_BACKWARD,nflags)
+     call sfftw_plan_dft_r2c_1d(plan1,nfft1,rca,rca,nflags)
      call sfftw_plan_dft_1d(plan2,nfft2,c4a,c4a,FFTW_FORWARD,nflags)
      call sfftw_plan_dft_1d(plan3,nfft2,cfilt,cfilt,FFTW_BACKWARD,nflags)
      call timer('FFTplans ',1)
@@ -67,8 +68,8 @@ subroutine filbig(dd,npts,f0,newdat,c4a,n4,sq0)
 
   if(newdat.ne.0) then
      nz=min(npts,nfft1)
-     ca(1:nz)=dd(1:nz)
-     ca(nz+1:)=0.                   !### Should change this to r2c FFT ###
+     rca(1:nz)=dd(1:nz)
+     rca(nz+1:)=0.
      call timer('FFTbig  ',0)
      call sfftw_execute(plan1)
      call timer('FFTbig  ',1)
@@ -78,7 +79,7 @@ subroutine filbig(dd,npts,f0,newdat,c4a,n4,sq0)
         if(j.lt.1) j=1
         if(j.gt.NSZ) j=NSZ
         fac=sqrt(min(30.0,1.0/ref(j)))
-        ca(i)=fac * ca(i)
+        ca(i)=conjg(fac * ca(i))
      enddo
   endif
 

lib/four2a.f90

@@ -22,8 +22,8 @@ subroutine four2a(a,nfft,ndim,isign,iform)
   complex aa(NSMALL)
   integer nn(NPMAX),ns(NPMAX),nf(NPMAX)
   integer*8 plan(NPMAX),nl(NPMAX),nloc
+!  character cfftw*20
   data nplan/0/,npatience/1/
-!  data nplan/0/,npatience/0/
   include 'fftw3.f90'
   save plan,nplan,nn,ns,nf,nl
 
@@ -42,6 +42,16 @@ subroutine four2a(a,nfft,ndim,isign,iform)
   nf(i)=iform
   nl(i)=nloc
 
+!  cfftw(1:2)='ci'
+!  if(nf(i).ne.1) cfftw(1:2)='ri'
+!  cfftw(3:3)='f'
+!  if(ns(i).eq.1) cfftw(3:3)='b'
+!  write(cfftw(4:),*) nn(i)
+!  cfftw=cfftw(1:3)//cfftw(5:)
+!  write(12,3999) i,nn(i),ns(i),nf(i),cfftw
+!3999 format(4i10,2x,a20)
+!  flush(12)
+
 ! Planning: FFTW_ESTIMATE, FFTW_ESTIMATE_PATIENT, FFTW_MEASURE, 
 !            FFTW_PATIENT,  FFTW_EXHAUSTIVE
   nflags=FFTW_ESTIMATE

lib/jt9.f90

@@ -103,7 +103,19 @@ program jt9
      npts=(60*ntrperiod-6)*12000
      if(iarg .eq. offset + 1) then
         open(12,file=trim(data_dir)//'/timer.out',status='unknown')
-        call timer('jt9     ',0)
+
+! Import FFTW wisdom, if available:
+        open(28,file=trim(data_dir)//'/fftwf_wisdom.dat',status='old',err=30)
+        read(28,1000,err=30,end=30) firstline
+1000    format(a30)
+        rewind 28
+        call import_wisdom_from_file(isuccess,28)
+        close(28)
+        if(isuccess.ne.0) write(12,1010) firstline
+1010    format('Imported FFTW wisdom: ',a30)
+        call flush(12)
+
+30      call timer('jt9     ',0)
      endif
 
      id2=0                               !??? Why is this necessary ???

lib/jt9a.f90

@@ -25,7 +25,18 @@ subroutine jt9a()
   call getcwd(cwd)
   open(12,file=trim(data_dir)//'/timer.out',status='unknown')
 
-  limtrace=0
+  ! Import FFTW wisdom, if available:
+  open(28,file=trim(exe_dir)//'/fftwf_wisdom.dat',status='old',err=30)
+  read(28,1000,err=30,end=30) firstline
+1000 format(a30)
+  rewind 28
+  call import_wisdom_from_file(isuccess,28)
+  close(28)
+  if(isuccess.ne.0) write(12,1010) firstline
+1010 format('Imported FFTW wisdom: ',a30)
+  call flush(12)
+
+30 limtrace=0
 !  limtrace=-1                            !Disable all calls to timer()
   lu=12
 

lib/wisdom1.bat

@@ -0,0 +1,2 @@
+C:\JTSDK-QT\fftw3f\fftwf-wisdom -o fftwf_wisdom.dat -t 1 -m rif672000 cif77175 cib77175 rif16384 rif884736 cib2048 rif8192 rif512 rib512 cib512
+